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POOLING AND SERVICING AGREEMENT

Pooling and Servicing Agreement

POOLING AND SERVICING AGREEMENT | Document Parties: WELLS FARGO MORTGAGE BACKED SECURITIES SERIES 2004-DD TRUST | WACHOVIA BANK, NATIONAL ASSOCIATION | WELLS FARGO ASSET SECURITIES CORPORATION | WELLS FARGO BANK, NA You are currently viewing:
This Pooling and Servicing Agreement involves

WELLS FARGO MORTGAGE BACKED SECURITIES SERIES 2004-DD TRUST | WACHOVIA BANK, NATIONAL ASSOCIATION | WELLS FARGO ASSET SECURITIES CORPORATION | WELLS FARGO BANK, NA

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Title: POOLING AND SERVICING AGREEMENT
Governing Law: New York     Date: 1/25/2005

POOLING AND SERVICING AGREEMENT, Parties: wells fargo mortgage backed securities series 2004-dd trust , wachovia bank  national association , wells fargo asset securities corporation , wells fargo bank  na
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                                                                       EXHIBIT 4


       ___________________________________________________________________



                    WELLS FARGO ASSET SECURITIES CORPORATION

                                     (Seller)

                                       and

                             WELLS FARGO BANK, N.A.

                                (Master Servicer)

                                       and

                       WACHOVIA BANK, NATIONAL ASSOCIATION

                                    (Trustee)

                         POOLING AND SERVICING AGREEMENT

                          Dated as of December 17, 2004

                                 $600.082,218.57

                       Mortgage Pass-Through Certificates
                                 Series 2004-DD


        _________________________________________________________________


<PAGE>


                                TABLE OF CONTENTS

                                                                             Page

                                    ARTICLE I

                                   DEFINITIONS

Section 1.01   Definitions..............................................
Section 1.02   Acts of Holders..........................................
Section 1.03   Effect of Headings and Table of Contents.................
Section 1.04   Benefits of Agreement....................................

                                   ARTICLE II

                          CONVEYANCE OF MORTGAGE LOANS;
                      ORIGINAL ISSUANCE OF THE CERTIFICATES

Section 2.01   Conveyance of Mortgage Loans.............................
Section 2.02   Acceptance by Custodian..................................
Section 2.03   Representations and Warranties of the Master Servicer and
               the Seller..............................................
Section 2.04   Execution and Delivery of Certificates...................
Section 2.05   Designation of Certificates; Designation of Startup Day
                and Latest Possible Maturity Date.......................
Section 2.06   Optional Substitution of Mortgage Loans..................

                                   ARTICLE III

                  ADMINISTRATION OF THE TRUST ESTATE; SERVICING
                               OF THE MORTGAGE LOANS

Section 3.01   Certificate Account......................................
Section 3.02   Permitted Withdrawals from the Certificate Account.......
Section 3.03   Advances by Master Servicer and Trustee..................
Section 3.04   Custodian to Cooperate; Release of Owner Mortgage Loan
               Files and Retained Mortgage Loan Files..................
Section 3.05   Reports to the Trustee; Annual Compliance Statements.....
Section 3.06   Title, Management and Disposition of Any REO Mortgage
               Loan....................................................
Section 3.07   Amendments to Servicing Agreements,
               Modification of Standard Provisions.....................
Section 3.08   Oversight of Servicing...................................
Section 3.09   Termination and Substitution of Servicing Agreements.....
Section 3.10   Application of Net Liquidation Proceeds..................
Section 3.11   Exchange Act Reports.....................................

                                   ARTICLE IV

                    DISTRIBUTIONS IN RESPECT OF CERTIFICATES;
                         PAYMENTS TO CERTIFICATEHOLDERS;
                             STATEMENTS AND REPORTS

Section 4.01   Distributions............................................
Section 4.02   Allocation of Realized Losses............................
Section 4.03   Paying Agent.............................................
Section 4.04   Statements to Certificateholders;
               Reports to the Trustee and the Seller...................
Section 4.05   Reports to Mortgagors and the Internal Revenue Service...
Section 4.06   Calculation of Amounts; Binding Effect of Interpretations
               and Actions of Master Servicer..........................

                                    ARTICLE V

                                THE CERTIFICATES

Section 5.01   The Certificates.........................................
Section 5.02   Registration of Certificates.............................
Section 5.03   Mutilated, Destroyed, Lost or Stolen Certificates........
Section 5.04   Persons Deemed Owners....................................
Section 5.05   Access to List of Certificateholders' Names and Addresses
Section 5.06   Maintenance of Office or Agency..........................
Section 5.07   Definitive Certificates..................................
Section 5.08   Notices to Clearing Agency...............................

                                   ARTICLE VI

                       THE SELLER AND THE MASTER SERVICER

Section 6.01   Liability of the Seller and the Master Servicer..........
Section 6.02   Merger or Consolidation of the Seller or the Master
               Servicer................................................
Section 6.03   Limitation on Liability of the Seller, the Master
               Servicer and Others.....................................
Section 6.04   Resignation of the Master Servicer.......................
Section 6.05   Compensation to the Master Servicer......................
Section 6.06   Assignment or Delegation of Duties by Master Servicer....
Section 6.07   Indemnification of Trustee and Seller by Master Servicer.

                                   ARTICLE VII

                                     DEFAULT

Section 7.01   Events of Default........................................
Section 7.02   Other Remedies of Trustee................................
Section 7.03   Directions by Certificateholders and
               Duties of Trustee During Event of Default...............
Section 7.04   Action upon Certain Failures of the
               Master Servicer and upon Event of Default...............
Section 7.05   Trustee to Act; Appointment of Successor.................
Section 7.06   Notification to Certificateholders.......................

                                   ARTICLE VIII

                             CONCERNING THE TRUSTEE

Section 8.01   Duties of Trustee........................................
Section 8.02   Certain Matters Affecting the Trustee....................
Section 8.03   Trustee Not Required to Make Investigation...............
Section 8.04   Trustee Not Liable for Certificates or Mortgage Loans....
Section 8.05   Trustee May Own Certificates.............................
Section 8.06   The Master Servicer to Pay Fees and Expenses.............
Section 8.07   Eligibility Requirements.................................
Section 8.08   Resignation and Removal..................................
Section 8.09   Successor................................................
Section 8.10   Merger or Consolidation..................................
Section 8.11   Authenticating Agent.....................................
Section 8.12   Separate Trustees and Co-Trustees........................
Section 8.13   Tax Matters; Compliance with REMIC Provisions............
Section 8.14   Monthly Advances.........................................

                                   ARTICLE IX

                                   TERMINATION

Section 9.01   Termination upon Purchase by the
               Seller or Liquidation of All Mortgage Loans.............
Section 9.02   Additional Termination Requirements......................

                                    ARTICLE X

                            MISCELLANEOUS PROVISIONS

Section 10.01 Amendment................................................
Section 10.02 Recordation of Agreement.................................
Section 10.03 Limitation on Rights of Certificateholders...............
Section 10.04 Governing Law; Jurisdiction..............................
Section 10.05 Notices..................................................
Section 10.06 Severability of Provisions...............................
Section 10.07 Special Notices to Rating Agencies.......................
Section 10.08 Covenant of Seller.......................................
Section 10.09 Recharacterization.......................................

                                   ARTICLE XI

                             TERMS FOR CERTIFICATES

Section 11.01 Cut-Off Date.............................................
Section 11.02 Cut-Off Date Aggregate Principal Balance.................
Section 11.03 Original Group Percentage................................
Section 11.04 Original Principal Balances of the Classes of Class A
               Certificates............................................
Section 11.05 Reserved.................................................
Section 11.06 Original Aggregate Subordinated Percentage...............
Section 11.07 Original Class B Principal Balance.......................
Section 11.08 Original Principal Balances of the Classes of Class B
               Certificates............................................
Section 11.09 Original Class B-1 Fractional Interest...................
Section 11.10 Original Class B-2 Fractional Interest...................
Section 11.11 Original Class B-3 Fractional Interest...................
Section 11.12 Original Class B-4 Fractional Interest...................
Section 11.13 Original Class B-5 Fractional Interest...................
Section 11.14 Closing Date.............................................
Section 11.15 Right to Purchase........................................
Section 11.16 Wire Transfer Eligibility................................
Section 11.17 Single Certificate.......................................
Section 11.18 Servicing Fee Rate.......................................
Section 11.19 Master Servicing Fee Rate................................


                                    EXHIBITS

EXHIBIT A-I-A-1          -      Form of Face of Class I-A-1 Certificate
EXHIBIT A-II-A-1         -      Form of Face of Class II-A-1 Certificate
EXHIBIT A-II-A-2         -      Form of Face of Class II-A-2 Certificate
EXHIBIT A-II-A-3         -      Form of Face of Class II-A-3 Certificate
EXHIBIT A-II-A-4         -      Form of Face of Class II-A-4 Certificate
EXHIBIT A-II-A-5         -      Form of Face of Class II-A-5 Certificate
EXHIBIT A-II-A-6         -      Form of Face of Class II-A-6 Certificate
EXHIBIT A-II-A-7         -      Form of Face of Class II-A-7 Certificate
EXHIBIT A-II-A-8         -      Form of Face of Class II-A-8 Certificate
EXHIBIT A-III-A-R        -      Form of Face of Class III-A-R Certificate
EXHIBIT A-III-A-LR       -      Form of Face of Class III-A-LR Certificate
EXHIBIT B-1              -       Form of Face of Class B-1 Certificate
EXHIBIT B-2              -      Form of Face of Class B-2 Certificate
EXHIBIT B-3              -      Form of Face of Class B-3 Certificate
EXHIBIT B-4              -      Form of Face of Class B-4 Certificate
EXHIBIT B-5              -      Form of Face of Class B-5 Certificate
EXHIBIT B-6              -      Form of Face of Class B-6 Certificate
EXHIBIT C                -      Form of Reverse of Series 2004-DD Certificates
EXHIBIT D                -      Reserved
EXHIBIT E                 -      Custodial Agreement
EXHIBIT F-1A             -      Schedule of Mortgage Loans in Loan Group I
EXHIBIT F-1B             -      Schedule of Mortgage Loans in Loan Group II
EXHIBIT F-2              -      Schedule of Other Servicer Mortgage Loans
EXHIBIT G                -      Request for Release
EXHIBIT H                -      Affidavit Pursuant to Section 860E(e)(4) of the
                              Internal Revenue Code of 1986, as amended, and
                              for Non-ERISA Investors
EXHIBIT I                -      Letter from Transferor of Residual Certificates
EXHIBIT J                -      Transferee's Letter (Class [B-4] [B-5] [B-6]
                                  Certificates)
EXHIBIT K                -      List of Recordation States
EXHIBIT L                -      Servicing Agreements
EXHIBIT M                -      Form of Special Servicing Agreement
EXHIBIT N                -      Form of Initial Certification of the Custodian
EXHIBIT O                -      Form of Final Certification of the Custodian
EXHIBIT P                -      Form of Sarbanes-Oxley Certification
EXHIBIT Q                -      Schedule of Pledged Asset Mortgage Loans
SCHEDULE I               -      Applicable Unscheduled Principal Receipt Period

<PAGE>


            This Pooling and Servicing Agreement, dated as of December 17, 2004
executed by WELLS FARGO ASSET SECURITIES CORPORATION, as Seller, WELLS FARGO
BANK, N.A., as Master Servicer, and WACHOVIA BANK, NATIONAL ASSOCIATION, as
Trustee.

                          W I T N E S S E T H   T H A T:

            In consideration of the mutual agreements herein contained, the
Seller, the Master Servicer and the Trustee agree as follows:

                                    ARTICLE I

                                   DEFINITIONS

            Section 1.01 Definitions.

            Whenever used herein, the following words and phrases, unless the
context otherwise requires, shall have the meanings specified in this Article.

            Accepted Master Servicing Practices: Accepted Master Servicing
Practices shall consist of the customary and usual master servicing practices of
prudent master servicing institutions which master service mortgage loans of the
same type as the Mortgage Loans in the jurisdictions in which the related
Mortgaged Properties are located, regardless of the date upon which the related
Mortgage Loans were originated.

            Adjusted Principal Balance: As to any Distribution Date and any
Class of Class B Certificates, the greater of (A) zero and (B) (i) the Principal
Balance of such Class with respect to such Distribution Date minus (ii) the
Adjustment Amount for such Distribution Date less the Principal Balances for any
Classes of Class B Certificates with higher numerical designations.

            Adjustment Amount: For any Distribution Date, the difference between
(A) the sum of the Aggregate Class A Principal Balance and the Class B Principal
Balance as of the related Determination Date and (B) the sum of (i) the sum of
the Aggregate Class A Principal Balance and the Class B Principal Balance as of
the Determination Date succeeding such Distribution Date and (ii) the aggregate
amount that would have been distributed to all Classes as principal in
accordance with Section 4.01(a)(i) for such Distribution Date without regard to
the provisos in the definitions of Class B-1 Optimal Principal Amount, Class B-2
Optimal Principal Amount, Class B-3 Optimal Principal Amount, Class B-4 Optimal
Principal Amount, Class B-5 Optimal Principal Amount and Class B-6 Optimal
Principal Amount.

            Adjustment Date: As to each Mortgage Loan, the Due Date on which
date an adjustment to the Mortgage Interest Rate of such Mortgage Loan becomes
effective under the related Mortgage Note, which Due Date is the date set forth
in the Mortgage Loan Schedule as the first Adjustment Date and each subsequent
anniversary thereof.

            Aggregate Adjusted Pool Amount: With respect to any Distribution
Date, the sum of the Group I Adjusted Pool Amount and Group II Adjusted Pool
Amount.

            Aggregate Class A Principal Balance: With respect to any
Determination Date, the sum of the Group I-A Principal Balance and Group II-A
Principal Balance.

            Aggregate Class A Percentage: With respect to any Distribution Date,
the percentage, the numerator of which is the Aggregate Class A Principal
Balance prior to giving effect to any distributions on such Distribution Date,
and the denominator of which is the sum of the Pool Balances for each Loan Group
on the first day of the month preceding the month of such Distribution Date.

            Aggregate Group I-A Unpaid Interest Shortfall: As to any
Distribution Date, an amount equal to the sum of the Class A Unpaid Interest
Shortfalls for the Group I-A Certificates.

             Aggregate Group II-A Unpaid Interest Shortfall: As to any
Distribution Date, an amount equal to the sum of the Class A Unpaid Interest
Shortfalls for the Group II-A Certificates.

            Aggregate Principal Balance: As of any Determination Date, the sum
of the Group I-A Principal Balance, the Group II-A Principal Balance and the
Class B Principal Balance as of such date.

            Aggregate Subordinated Percentage: As to any Determination Date, the
difference between 100% and the Aggregate Class A Percentage.

            Agreement: This Pooling and Servicing Agreement and all amendments
and supplements hereto.

            Applicable Unscheduled Principal Receipt Period: With respect to the
Mortgage Loans serviced by each Servicer and each of the Full Unscheduled
Principal Receipts and Partial Unscheduled Principal Receipts, the Unscheduled
Principal Receipt Period specified on Schedule I hereto.

            Apportioned Class B Principal Distribution Amount: As to any
Distribution Date and any Class of Class B Certificates, the product of (i) the
applicable Class B Principal Distribution Amount and (ii) the Apportionment
Fraction for such Class.

            Apportionment Fraction: As to any Class of Class B Certificates and
any Distribution Date occurring prior to the Subordination Depletion Date and on
or after the Distribution Date on which the Principal Balance of each Class of
one Group has been reduced to zero, a fraction, the numerator of which is the
portion of the Class B Loan Group Optimal Principal Amounts represented by
clauses (ii) and (iii) of the definition thereof (other than Liquidation
Proceeds that are not partial Liquidation Proceeds) for which the corresponding
Class A Certificates are no longer outstanding and the denominator of which is
the applicable Class B Optimal Principal Amount without regard to the proviso
thereto.

            Authenticating Agent: Any authenticating agent appointed by the
Trustee pursuant to Section 8.11. There shall initially be no Authenticating
Agent for the Certificates.

            Available Master Servicer Compensation: With respect to any
Distribution Date, the sum of (a) the Master Servicing Fee for such Distribution
Date, (b) interest earned through the business day preceding the applicable
Distribution Date on any Prepayments in Full remitted to the Master Servicer and
(c) the aggregate amount of Month End Interest remitted by the Servicers to the
Master Servicer pursuant to the related Servicing Agreements.

            Bankruptcy Code: The Bankruptcy Code of 1978, as amended.

            Bankruptcy Loss: With respect to any Mortgage Loan, a Deficient
Valuation or Debt Service Reduction; provided, however, that a Bankruptcy Loss
shall not be deemed a Bankruptcy Loss hereunder so long as the applicable
Servicer has notified the Master Servicer and the Trustee in writing that such
Servicer is diligently pursuing any remedies that may exist in connection with
the representations and warranties made regarding the related Mortgage Loan and
either (A) the related Mortgage Loan is not in default with regard to payments
due thereunder or (B) delinquent payments of principal and interest under the
related Mortgage Loan and any premiums on any applicable primary hazard
insurance policy and any related escrow payments in respect of such Mortgage
Loan are being advanced on a current basis by such Servicer without giving
effect to any Debt Service Reduction.

            Beneficial Owner: With respect to a Book-Entry Certificate, the
Person who is the beneficial owner of such Book-Entry Certificate, as reflected
on the books of the Clearing Agency, or on the books of a Person maintaining an
account with such Clearing Agency (directly or as an indirect participant, in
accordance with the rules of such Clearing Agency), as the case may be.

            Book-Entry Certificate: Any one of the Class I-A-1 Certificates,
Class II-A-1 Certificates, Class II-A-2 Certificates, Class II-A-3 Certificates,
Class II-A-4 Certificates, Class II-A-5 Certificates, Class II-A-6 Certificates,
Class II-A-7 Certificates, Class II-A-8 Certificates, Class B-1 Certificates,
Class B-2 Certificates and Class B-3 Certificates, beneficial ownership and
transfers of which shall be evidenced by, and made through, book entries by the
Clearing Agency as described in Section 5.01(b).

            Business Day: Any day other than (i) a Saturday or a Sunday, or (ii)
a legal holiday in the City of New York, State of Iowa, State of Maryland, State
of Minnesota or State of North Carolina or (iii) a day on which banking
institutions in the City of New York, or the State of Iowa, State of Maryland,
State of Minnesota or State of North Carolina are authorized or obligated by law
or executive order to be closed.

            Certificate: Any one of the Class A Certificates or Class B
Certificates.

            Certificate Account: The separate trust account established and
maintained by the Master Servicer in the name of the Master Servicer on behalf
of the Trustee pursuant to Section 3.01. The Certificate Account shall be an
Eligible Account.

            Certificate Custodian: Initially, Wachovia Bank, National
Association; thereafter any other Certificate Custodian acceptable to The
Depository Trust Company and selected by the Trustee.

             Certificate Register and Certificate Registrar: Respectively, the
register maintained pursuant to and the registrar provided for in Section 5.02.
The initial Certificate Registrar is the Trustee.

            Certificateholder or Holder: The Person in whose name a Certificate
is registered in the Certificate Register, except that, solely for the purposes
of the taking of any action under Articles VII or VIII, any Certificate
registered in the name of the Master Servicer, a Servicer or any affiliate
thereof shall be deemed not to be outstanding and the Voting Interest evidenced
thereby shall not be taken into account in determining whether the requisite
percentage of Certificates necessary to effect any such action has been
obtained.

            Class: All certificates whose form is identical except for
variations in the Percentage Interest evidenced thereby.

            Class I-A-1 Certificate: Any one of the Certificates executed by the
Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit A-I-A-1 and Exhibit C hereto.

            Class I-A-1 Certificateholder: The registered holder of a Class
I-A-1 Certificate.

            Class I-L Interest: A regular interest in the Lower-Tier REMIC which
is held as an asset of the Upper-Tier REMIC and is entitled to monthly
distributions as provided in Section 4.01(a)(iii) hereof.

            Class I-LS Interest: A regular interest in the Lower-Tier REMIC
which is held as an asset of the Upper-Tier REMIC and is entitled to monthly
distributions as provided in Section 4.01(a)(iii) hereof.

            Class II-A-1 Certificate: Any one of the Certificates executed by
the Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit A-II-A-1 and Exhibit C hereto.

            Class II-A-1 Certificateholder: The registered holder of a Class
II-A-1 Certificate.

            Class II-A-2 Certificate: Any one of the Certificates executed by
the Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit A-II-A-2 and Exhibit C hereto.

            Class II-A-2 Certificateholder: The registered holder of a Class
II-A-2 Certificate.

            Class II-A-3 Certificate: Any one of the Certificates executed by
the Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit A-II-A-3 and Exhibit C hereto.

            Class II-A-3 Certificateholder: The registered holder of a Class
II-A-3 Certificate.

            Class II-A-4 Certificate: Any one of the Certificates executed by
the Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit A-II-A-4 and Exhibit C hereto.

            Class II-A-4 Certificateholder: The registered holder of a Class
II-A-4 Certificate.

            Class II-A-5 Certificate: Any one of the Certificates executed by
the Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit A-II-A-5 and Exhibit C hereto.

            Class II-A-5 Certificateholder: The registered holder of a Class
II-A-5 Certificate.

            Class II-A-6 Certificate: Any one of the Certificates executed by
the Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit A-II-A-6 and Exhibit C hereto.

            Class II-A-6 Certificateholder: The registered holder of a Class
II-A-6 Certificate.

            Class II-A-7 Certificate: Any one of the Certificates executed by
the Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit A-II-A-7 and Exhibit C hereto.

            Class II-A-7 Certificateholder: The registered holder of a Class
II-A-7 Certificate.

            Class II-A-7 Loss Amount: With respect to any Determination Date
after the Subordination Depletion Date, the amount, if any, by which the
Principal Balance of the Class II-A-7 Certificates would be reduced as a result
of the application of the third sentence of the definition of Principal Balance.

            Class II-A-8 Certificate: Any one of the Certificates executed by
the Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit A-II-A-8 and Exhibit C hereto.

            Class II-A-8 Certificateholder: The registered holder of a Class
II-A-8 Certificate.

            Class II-A-8 Loss Allocation Amount: With respect to any
Determination Date after the Subordination Depletion Date the lesser of (a) the
Principal Balance of the Class II-A-8 Certificates with respect to such
Determination Date prior to any reduction for the Class II-A-8 Loss Allocation
Amount and (b) the Class II-A-7 Loss Amount.

            Class II-A-LR Certificate: The Certificate executed by the Trustee
and authenticated by the Trustee or the Authenticating Agent in substantially
the form set forth in Exhibit A-II-A-LR and Exhibit C hereto.

            Class II-A-LR Certificateholder: The registered holder of the Class
II-A-LR Certificate.

            Class II-A-R Certificate: The Certificate executed by the Trustee
and authenticated by the Trustee or the Authenticating Agent in substantially
the form set forth in Exhibit A-II-A-R and Exhibit C hereto.

            Class II-A-R Certificateholder: The registered holder of the Class
II-A-R Certificate.

            Class II-L Interest: A regular interest in the Lower-Tier REMIC
which is held as an asset of the Upper-Tier REMIC and is entitled to monthly
distributions as provided in Section 4.01(a)(iii) hereof.

            Class II-LS Interest: A regular interest in the Lower-Tier REMIC
which is held as an asset of the Upper-Tier REMIC and is entitled to monthly
distributions as provided in Section 4.01(a)(iii) hereof.

            Class A Certificate: Either of the Group I-A Certificates or Group
II-A Certificates.

            Class A Certificateholder: The registered holder of a Class A
Certificate.

            Class A Interest Percentage: As to any Distribution Date and any
Class of Class A Certificates, the percentage calculated by dividing the
Interest Accrual Amount of such Class (determined without regard to clause (ii)
of the definition thereof) by the sum of (a) the Group I-A Interest Accrual
Amount and (b) the Group II-A Interest Accrual Amount.

            Class A Pass-Through Rate: For each Distribution Date and any of the
Group I-A Certificates, the Class A Pass-Through Rate will be a per annum rate
equal to Net WAC of the Group I Mortgage Loans. For each Distribution Date and
any of the Group II-A Certificates, the Class A Pass-Through Rate will be a per
annum rate equal to Net WAC of the Group II Mortgage Loans.

            Class A Unpaid Interest Shortfall: As to any Distribution Date and
Class of Class A Certificates, the amount, if any, by which the aggregate of the
Group I-A Interest Shortfall Amounts and Group II-A Interest Shortfall Amounts
for such Class for prior Distribution Dates is in excess of the amounts
distributed in respect of such Class on prior Distribution Dates pursuant to
Paragraph second of Section 4.01(a)(i).

            Class B Certificate: Any one of the Class B-1 Certificates, Class
B-2 Certificates, Class B-3 Certificates, Class B-4 Certificates, Class B-5
Certificates or Class B-6 Certificates.

            Class B Certificateholder: The registered holder of a Class B
Certificate.

            Class B Distribution Amount: Any of the Class B-1 Distribution
Amount, Class B-2 Distribution Amount, Class B-3 Distribution Amount, Class B-4
Distribution Amount, Class B-5 Distribution Amount or Class B-6 Distribution
Amount.

            Class B Interest Accrual Amount: With respect to any Distribution
Date, the sum of the Interest Accrual Amounts for the Classes of Class B
Certificates with respect to such Distribution Date.

            Class B Interest Percentage: With respect to any Distribution Date
and any Class of Class B Certificates, the percentage calculated by dividing the
Interest Accrual Amount of such Class (determined without regard to clause (ii)
of the definition thereof) by the Class B Interest Accrual Amount (determined
without regard to clause (ii) of the definition of each Interest Accrual
Amount).

            Class B Interest Shortfall Amount: Any of the Class B-1 Interest
Shortfall Amount, Class B-2 Interest Shortfall Amount, Class B-3 Interest
Shortfall Amount, Class B-4 Interest Shortfall Amount, Class B-5 Interest
Shortfall Amount or Class B-6 Interest Shortfall Amount.

            Class B Loan Group I Optimal Principal Amount: Any of the Class B-1,
Class B-2, Class B-3, Class B-4, Class B-5 or Class B-6 Loan Group I Optimal
Principal Amounts.

            Class B Loan Group II Optimal Principal Amount: Any of the Class
B-1, Class B-2, Class B-3, Class B-4, Class B-5 or Class B-6 Loan Group II
Optimal Principal Amounts.

            Class B Loan Group Optimal Principal Amount: Either of the Class B
Loan Group I Optimal Principal Amount or Class B Loan Group II Optimal Principal
Amount.

            Class B Loss Percentage: With respect to any Determination Date and
any Class of Class B Certificates then outstanding, the percentage calculated by
dividing the Principal Balance of such Class by the Class B Principal Balance
(determined without regard to any Principal Balance of any Class of Class B
Certificates not then outstanding), in each case determined as of the preceding
Determination Date.

            Class B Optimal Principal Amount: Any of the Class B-1 Optimal
Principal Amount, Class B-2 Optimal Principal Amount, Class B-3 Optimal
Principal Amount, Class B-4 Optimal Principal Amount, Class B-5 Optimal
Principal Amount or Class B-6 Optimal Principal Amount.

            Class B Pass-Through Rate: As to any Distribution Date, the Class B
Pass-Through Rate will be a per annum rate equal to the weighted average (based
on the Group Subordinate Amount for each Loan Group) of the Net WACs of the Loan
Groups.

            Class B Principal Balance: As of any date, an amount equal to the
sum of the Class B-1 Principal Balance, Class B-2 Principal Balance, Class B-3
Principal Balance, Class B-4 Principal Balance, Class B-5 Principal Balance and
Class B-6 Principal Balance.

            Class B Principal Distribution Amount: Any of the Class B-1
Principal Distribution Amount, Class B-2 Principal Distribution Amount, Class
B-3 Principal Distribution Amount, Class B-4 Principal Distribution Amount,
Class B-5 Principal Distribution Amount or Class B-6 Principal Distribution
Amounts.

            Class B Unpaid Interest Shortfall: Any of the Class B-1 Unpaid
Interest Shortfall, Class B-2 Unpaid Interest Shortfall, Class B-3 Unpaid
Interest Shortfall, Class B-4 Unpaid Interest Shortfall, Class B-5 Unpaid
Interest Shortfall or Class B-6 Unpaid Interest Shortfall.

            Class B-1 Certificate: Any one of the Certificates executed by the
Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit B-1 and Exhibit C hereto.

            Class B-1 Certificateholder: The registered holder of a Class B-1
Certificate.

            Class B-1 Distribution Amount: As to any Distribution Date, any
amount distributable to the Holders of the Class B-1 Certificates pursuant to
Paragraphs first, second and third of Section 4.01(a)(ii).

            Class B-1 Interest Shortfall Amount: As to any Distribution Date,
any amount by which the Interest Accrual Amount of the Class B-1 Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-1 Certificates on such Distribution Date pursuant to Paragraph
first of Section 4.01(a)(ii).

            Class B-1 Loan Group I Optimal Principal Amount: As to any
Distribution Date, the Class B-1 Optimal Principal Amount calculated only with
respect to Group I Mortgage Loans and without regard to the proviso thereto.

            Class B-1 Loan Group II Optimal Principal Amount: As to any
Distribution Date, the Class B-1 Optimal Principal Amount calculated only with
respect to Group II Mortgage Loans and without regard to the proviso thereto.

            Class B-1 Optimal Principal Amount: As to any Distribution Date and
each Outstanding Mortgage Loan, an amount equal to the sum of

(I) the sum of:

            (i) the Group I Class B-1 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-1 Percentage (with respect to
      each such Group II Mortgage Loan) of the principal portion of the Monthly
       Payment due on the Due Date occurring in the month of such Distribution
      Date on such Mortgage Loan;

            (ii) the Group I Class B-1 Prepayment Percentage (with respect to
      each such Group I Mortgage Loan) or Group II Class B-1 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of all
      Unscheduled Principal Receipts (other than Recoveries) that were received
      by a Servicer with respect to such Mortgage Loan during the Applicable
      Unscheduled Principal Receipt Period relating to such Distribution Date
      for each applicable type of Unscheduled Principal Receipt;

            (iii) the Group I Class B-1 Prepayment Percentage (with respect to
      each such Group I Mortgage Loan) or Group II Class B-1 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of the
      Scheduled Principal Balance of such Mortgage Loan which, during the one
      month period ending on the day preceding the Determination Date for such
       Distribution Date, was repurchased by the Seller pursuant to Section 2.02
      or 2.03; and

            (iv) the Group I Class B-1 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-1 Percentage (with respect to
       each such Group II Mortgage Loan) of the excess of the unpaid principal
      balance of such Mortgage Loan substituted for a Mortgage Loan during the
      one month period ending on the day preceding the Determination Date for
      such Distribution Date over the unpaid principal balance of such Mortgage
      Loan, less the amount allocable to the principal portion of any
      unreimbursed Periodic Advances previously made by the applicable Servicer,
      the Master Servicer or the Trustee in respect of such Mortgage Loan; and

(II) the Group I Class B-1 Prepayment Percentage or Group II Class B-1
Prepayment Percentage, as applicable, of the Recovery for each Loan Group for
such Distribution Date;

provided, however, that if an Optimal Adjustment Event occurs with respect to
such Class and such Distribution Date, the Class B-1 Optimal Principal Amount
will equal the lesser of (A) the Class B-1 Optimal Principal Amount calculated
as described in the preceding provisions and (B) the Adjusted Principal Balance
for the Class B-1 Certificates.

            Class B-1 Principal Balance: As to the first Determination Date, the
Original Class B-1 Principal Balance. As of any subsequent Determination Date,
the Original Class B-1 Principal Balance less the sum of all amounts previously
distributed in respect of the Class B-1 Certificates on prior Distribution Dates
(A) pursuant to Paragraph third of Section 4.01(a)(ii) and (B) as a result of a
Principal Adjustment; provided, however, if the Class B-1 Certificates are the
most subordinate Certificates outstanding, the Class B-1 Principal Balance will
equal the difference, if any, between the Aggregate Adjusted Pool Amount as of
the preceding Distribution Date less the Aggregate Class A Principal Balance as
of such Determination Date.

            Class B-1 Principal Distribution Amount: As to any Distribution
Date, any amount distributable to the Holders of the Class B-1 Certificates
pursuant to Paragraph third of Section 4.01(a)(ii).

            Class B-1 Unpaid Interest Shortfall: As to any Distribution Date,
the amount, if any, by which the aggregate of the Class B-1 Interest Shortfall
Amounts for prior Distribution Dates is in excess of the amounts distributed in
respect of the Class B-1 Certificates on prior Distribution Dates pursuant to
Paragraph second of Section 4.01(a)(ii).

            Class B-2 Certificate: Any one of the Certificates executed by the
Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit B-2 and Exhibit C hereto.

            Class B-2 Certificateholder: The registered holder of a Class B-2
Certificate.

            Class B-2 Distribution Amount: As to any Distribution Date, any
amount distributable to the Holders of the Class B-2 Certificates pursuant to
Paragraphs fourth, fifth and sixth of Section 4.01(a)(ii).

            Class B-2 Interest Shortfall Amount: As to any Distribution Date,
any amount by which the Interest Accrual Amount of the Class B-2 Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-2 Certificates on such Distribution Date pursuant to Paragraph
fourth of Section 4.01(a)(ii).

            Class B-2 Loan Group I Optimal Principal Amount: As to any
Distribution Date, the Class B-2 Optimal Principal Amount calculated only with
respect to Group I Mortgage Loans and without regard to the proviso thereto.

            Class B-2 Loan Group II Optimal Principal Amount: As to any
Distribution Date, the Class B-2 Optimal Principal Amount calculated only with
respect to Group II Mortgage Loans and without regard to the proviso thereto.

            Class B-2 Optimal Principal Amount: As to any Distribution Date and
each Outstanding Mortgage Loan, an amount equal to the sum of

(I) the sum of:

            (i) the Group I Class B-2 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-2 Percentage (with respect to
      each such Group II Mortgage Loan) of the principal portion of the Monthly
      Payment due on the Due Date occurring in the month of such Distribution
      Date on such Mortgage Loan;

            (ii) the Group I Class B-2 Prepayment Percentage (with respect to
      each such Group I Mortgage Loan) or Group II Class B-2 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of all
      Unscheduled Principal Receipts (other than Recoveries) that were received
      by a Servicer with respect to such Mortgage Loan during the Applicable
      Unscheduled Principal Receipt Period relating to such Distribution Date
      for each applicable type of Unscheduled Principal Receipt;

            (iii) the Group I Class B-2 Prepayment Percentage (with respect to
      each such Group I Mortgage Loan) or Group II Class B-2 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of the
      Scheduled Principal Balance of such Mortgage Loan which, during the one
      month period ending on the day preceding the Determination Date for such
      Distribution Date, was repurchased by the Seller pursuant to Section 2.02
      or 2.03; and

            (iv) the Group I Class B-2 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-2 Percentage (with respect to
      each such Group II Mortgage Loan) of the excess of the unpaid principal
      balance of such Mortgage Loan substituted for a Mortgage Loan during the
      one month period ending on the day preceding the Determination Date for
      such Distribution Date over the unpaid principal balance of such Mortgage
      Loan, less the amount allocable to the principal portion of any
      unreimbursed Periodic Advances previously made by the applicable Servicer,
      the Master Servicer or the Trustee in respect of such Mortgage Loan; and

(II) the Group I Class B-2 Prepayment Percentage or Group II Class B-2
Prepayment Percentage, as applicable, of the Recovery for each Loan Group for
such Distribution Date;

provided, however, that if an Optimal Adjustment Event occurs with respect to
such Class and such Distribution Date, the Class B-2 Optimal Principal Amount
will equal the lesser of (A) the Class B-2 Optimal Principal Amount calculated
as described in the preceding provisions and (B) the Adjusted Principal Balance
for the Class B-2 Certificates.

            Class B-2 Principal Balance: As to the first Determination Date, the
Original Class B-2 Principal Balance. As of any subsequent Determination Date,
the Original Class B-2 Principal Balance less the sum of all amounts previously
distributed in respect of the Class B-2 Certificates on prior Distribution Dates
(A) pursuant to Paragraph sixth of Section 4.01(a)(ii) and (B) as a result of a
Principal Adjustment; provided, however, if the Class B-2 Certificates are the
most subordinate Certificates outstanding, the Class B-2 Principal Balance will
equal the difference, if any, between the Aggregate Adjusted Pool Amount as of
the preceding Distribution Date less the sum of the Aggregate Class A Principal
Balance and the Class B-1 Principal Balance as of such Determination Date.

            Class B-2 Principal Distribution Amount: As to any Distribution
Date, any amount distributable to the Holders of the Class B-2 Certificates
pursuant to Paragraph sixth of Section 4.01(a)(ii).

            Class B-2 Unpaid Interest Shortfall: As to any Distribution Date,
the amount, if any, by which the aggregate of the Class B-2 Interest Shortfall
Amounts for prior Distribution Dates is in excess of the amounts distributed in
respect of the Class B-2 Certificates on prior Distribution Dates pursuant to
Paragraph fifth of Section 4.01(a)(ii).

            Class B-3 Certificate: Any one of the Certificates executed by the
Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit B-3 and Exhibit C hereto.

            Class B-3 Certificateholder: The registered holder of a Class B-3
Certificate.

            Class B-3 Distribution Amount: As to any Distribution Date, any
amount distributable to the Holders of the Class B-3 Certificates pursuant to
Paragraphs seventh, eighth and ninth of Section 4.01(a)(ii).

            Class B-3 Interest Shortfall Amount: As to any Distribution Date,
any amount by which the Interest Accrual Amount of the Class B-3 Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-3 Certificates on such Distribution Date pursuant to Paragraph
seventh of Section 4.01(a)(ii).

            Class B-3 Loan Group I Optimal Principal Amount: As to any
Distribution Date, the Class B-3 Optimal Principal Amount calculated only with
respect to Group I Mortgage Loans and without regard to the proviso thereto.

            Class B-3 Loan Group II Optimal Principal Amount: As to any
Distribution Date, the Class B-3 Optimal Principal Amount calculated only with
respect to Group II Mortgage Loans and without regard to the proviso thereto.

            Class B-3 Optimal Principal Amount: As to any Distribution Date and
each Outstanding Mortgage Loan, an amount equal to the sum of

(I) the sum of:

            (i) the Group I Class B-3 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-3 Percentage (with respect to
      each such Group II Mortgage Loan) of the principal portion of the Monthly
      Payment due on the Due Date occurring in the month of such Distribution
      Date on such Mortgage Loan;

            (ii) the Group I Class B-3 Prepayment Percentage (with respect to
       each such Group I Mortgage Loan) or Group II Class B-3 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of all
      Unscheduled Principal Receipts (other than Recoveries) that were received
      by a Servicer with respect to such Mortgage Loan during the Applicable
      Unscheduled Principal Receipt Period relating to such Distribution Date
      for each applicable type of Unscheduled Principal Receipt;

            (iii) the Group I Class B-3 Prepayment Percentage (with respect to
      each such Group I Mortgage Loan) or Group II Class B-3 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of the
      Scheduled Principal Balance of such Mortgage Loan which, during the one
      month period ending on the day preceding the Determination Date for such
      Distribution Date, was repurchased by the Seller pursuant to Section 2.02
      or 2.03; and

            (iv) the Group I Class B-3 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-3 Percentage (with respect to
      each such Group II Mortgage Loan) of the excess of the unpaid principal
      balance of such Mortgage Loan substituted for a Mortgage Loan during the
      one month period ending on the day preceding the Determination Date for
      such Distribution Date over the unpaid principal balance of such Mortgage
      Loan, less the amount allocable to the principal portion of any
      unreimbursed Periodic Advances previously made by the applicable Servicer,
      the Master Servicer or the Trustee in respect of such Mortgage Loan; and

(II) the Group I Class B-3 Prepayment Percentage or Group II Class B-3
Prepayment Percentage, as applicable, of the Recovery for each Loan Group for
such Distribution Date;

provided, however, that if an Optimal Adjustment Event occurs with respect to
such Class and such Distribution Date, the Class B-3 Optimal Principal Amount
will equal the lesser of (A) the Class B-3 Optimal Principal Amount calculated
as described in the preceding provisions and (B) the Adjusted Principal Balance
for the Class B-3 Certificates.

            Class B-3 Principal Balance: As to the first Determination Date, the
Original Class B-3 Principal Balance. As of any subsequent Determination Date,
the Original Class B-3 Principal Balance less the sum of all amounts previously
distributed in respect of the Class B-3 Certificates on prior Distribution Dates
(A) pursuant to Paragraph ninth of Section 4.01(a)(ii) and (B) as a result of a
Principal Adjustment; provided, however, if the Class B-3 Certificates are the
most subordinate Certificates outstanding, the Class B-3 Principal Balance will
equal the difference, if any, between the Aggregate Adjusted Pool Amount as of
the preceding Distribution Date less the sum of the Aggregate Class A Principal
Balance, the Class B-1 Principal Balance and the Class B-2 Principal Balance as
of such Determination Date.

            Class B-3 Unpaid Interest Shortfall: As to any Distribution Date,
the amount, if any, by which the aggregate of the Class B-3 Interest Shortfall
Amounts for prior Distribution Dates is in excess of the amounts distributed in
respect of the Class B-3 Certificates on prior Distribution Dates pursuant to
Paragraph eighth of Section 4.01(a)(ii).

            Class B-4 Certificate: Any one of the Certificates executed by the
Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit B-4 and Exhibit C hereto.

            Class B-4 Certificateholder: The registered holder of a Class B-4
Certificate.

            Class B-4 Distribution Amount: As to any Distribution Date, any
amount distributable to the Holders of the Class B-4 Certificates pursuant to
Paragraphs tenth, eleventh and twelfth of Section 4.01(a)(ii).

            Class B-4 Interest Shortfall Amount: As to any Distribution Date,
any amount by which the Interest Accrual Amount of the Class B-4 Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-4 Certificates on such Distribution Date pursuant to Paragraph
tenth of Section 4.01(a)(ii).

            Class B-4 Loan Group I Optimal Principal Amount: As to any
Distribution Date, the Class B-4 Optimal Principal Amount calculated only with
respect to Group I Mortgage Loans and without regard to the proviso thereto.

            Class B-4 Loan Group II Optimal Principal Amount: As to any
Distribution Date, the Class B-4 Optimal Principal Amount calculated only with
respect to Group II Mortgage Loans and without regard to the proviso thereto.

            Class B-4 Optimal Principal Amount: As to any Distribution Date and
each Outstanding Mortgage Loan, an amount equal to the sum of

(I) the sum of:

            (i) the Group I Class B-4 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-4 Percentage (with respect to
      each such Group II Mortgage Loan) of the principal portion of the Monthly
      Payment due on the Due Date occurring in the month of such Distribution
      Date on such Mortgage Loan;

            (ii) the Group I Class B-4 Prepayment Percentage (with respect to
      each such Group I Mortgage Loan) or Group II Class B-4 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of all
      Unscheduled Principal Receipts (other than Recoveries) that were received
      by a Servicer with respect to such Mortgage Loan during the Applicable
      Unscheduled Principal Receipt Period relating to such Distribution Date
      for each applicable type of Unscheduled Principal Receipt;

            (iii) the Group I Class B-4 Prepayment Percentage (with respect to
      each such Group I Mortgage Loan) or Group II Class B-4 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of the
      Scheduled Principal Balance of such Mortgage Loan which, during the one
      month period ending on the day preceding the Determination Date for such
      Distribution Date, was repurchased by the Seller pursuant to Section 2.02
      or 2.03; and

            (iv) the Group I Class B-4 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-4 Percentage (with respect to
      each such Group II Mortgage Loan) of the excess of the unpaid principal
      balance of such Mortgage Loan substituted for a Mortgage Loan during the
      one month period ending on the day preceding the Determination Date for
      such Distribution Date over the unpaid principal balance of such Mortgage
      Loan, less the amount allocable to the principal portion of any
      unreimbursed Periodic Advances previously made by the applicable Servicer,
      the Master Servicer or the Trustee in respect of such Mortgage Loan; and

(II) the Group I Class B-4 Prepayment Percentage or Group II Class B-4
Prepayment Percentage, as applicable, of the Recovery for such Distribution
Date;

provided, however, that if an Optimal Adjustment Event occurs with respect to
such Class and such Distribution Date, the Class B-4 Optimal Principal Amount
will equal the lesser of (A) the Class B-4 Optimal Principal Amount calculated
as described in the preceding provisions and (B) the Adjusted Principal Balance
for the Class B-4 Certificates.

            Class B-4 Principal Balance: As to the first Determination Date, the
Original Class B-4 Principal Balance. As of any subsequent Determination Date,
the Original Class B-4 Principal Balance less the sum of all amounts previously
distributed in respect of the Class B-4 Certificates on prior Distribution Dates
(A) pursuant to Paragraph twelfth of Section 4.01(a)(ii) and (B) as a result of
a Principal Adjustment; provided, however, if the Class B-4 Certificates are the
most subordinate Certificates outstanding, the Class B-4 Principal Balance will
equal the difference, if any, between the Aggregate Adjusted Pool Amount as of
the preceding Distribution Date less the sum of the Aggregate Class A Principal
Balance, the Class B-1 Principal Balance, the Class B-2 Principal Balance and
the Class B-3 Principal Balance as of such Determination Date.

            Class B-4 Principal Distribution Amount: As to any Distribution
Date, any amount distributable to the Holders of the Class B-4 Certificates
pursuant to Paragraph twelfth of Section 4.01(a)(ii).

            Class B-4 Unpaid Interest Shortfall: As to any Distribution Date,
the amount, if any, by which the aggregate of the Class B-4 Interest Shortfall
Amounts for prior Distribution Dates is in excess of the amounts distributed in
respect of the Class B-4 Certificates on prior Distribution Dates pursuant to
Paragraph eleventh of Section 4.01(a)(ii).

            Class B-5 Certificate: Any one of the Certificates executed by the
Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit B-5 and Exhibit C hereto.

            Class B-5 Certificateholder: The registered holder of a Class B-5
Certificate.

            Class B-5 Distribution Amount: As to any Distribution Date, any
amount distributable to the Holders of the Class B-5 Certificates pursuant to
Paragraphs thirteenth, fourteenth and fifteenth of Section 4.01(a)(ii).

            Class B-5 Interest Shortfall Amount: As to any Distribution Date,
any amount by which the Interest Accrual Amount of the Class B-5 Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-5 Certificates on such Distribution Date pursuant to Paragraph
thirteenth of Section 4.01(a)(ii).

            Class B-5 Loan Group I Optimal Principal Amount: As to any
Distribution Date, the Class B-5 Optimal Principal Amount calculated only with
respect to Group I Mortgage Loans and without regard to the proviso thereto.

            Class B-5 Loan Group II Optimal Principal Amount: As to any
Distribution Date, the Class B-5 Optimal Principal Amount calculated only with
respect to Group II Mortgage Loans and without regard to the proviso thereto.

            Class B-5 Optimal Principal Amount: As to any Distribution Date and
each Outstanding Mortgage Loan, an amount equal to the sum of

(I) the sum of:

            (i) the Group I Class B-5 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-5 Percentage (with respect to
      each such Group II Mortgage Loan) of the principal portion of the Monthly
      Payment due on the Due Date occurring in the month of such Distribution
      Date on such Mortgage Loan;

            (ii) the Group I Class B-5 Prepayment Percentage (with respect to
      each such Group I Mortgage Loan) or Group II Class B-5 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of all
      Unscheduled Principal Receipts (other than Recoveries) that were received
      by a Servicer with respect to such Mortgage Loan during the Applicable
      Unscheduled Principal Receipt Period relating to such Distribution Date
      for each applicable type of Unscheduled Principal Receipt;

            (iii) the Group I Class B-5 Prepayment Percentage (with respect to
      each such Group I Mortgage Loan) or Group II Class B-5 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of the
      Scheduled Principal Balance of such Mortgage Loan which, during the one
      month period ending on the day preceding the Determination Date for such
      Distribution Date, was repurchased by the Seller pursuant to Section 2.02
      or 2.03; and

            (iv) the Group I Class B-5 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-5 Percentage (with respect to
      each such Group II Mortgage Loan) of the excess of the unpaid principal
      balance of such Mortgage Loan substituted for a Mortgage Loan during the
      one month period ending on the day preceding the Determination Date for
      such Distribution Date over the unpaid principal balance of such Mortgage
      Loan, less the amount allocable to the principal portion of any
      unreimbursed Periodic Advances previously made by the applicable Servicer,
      the Master Servicer or the Trustee in respect of such Mortgage Loan; and

(II) the Group I Class B-5 Prepayment Percentage or Group II Class B-5
Prepayment Percentage, as applicable, of the Recovery for such Distribution
Date;

provided, however, that if an Optimal Adjustment Event occurs with respect to
such Class and such Distribution Date, the Class B-5 Optimal Principal Amount
will equal the lesser of (A) the Class B-5 Optimal Principal Amount calculated
as described in the preceding provisions and (B) the Adjusted Principal Balance
for the Class B-5 Certificates.

            Class B-5 Principal Balance: As to the first Determination Date, the
Original Class B-5 Principal Balance. As of any subsequent Determination Date,
the Original Class B-5 Principal Balance less the sum of all amounts previously
distributed in respect of the Class B-5 Certificates on prior Distribution Dates
(A) pursuant to Paragraph fifteenth of Section 4.01(a)(ii) and (B) as a result
of a Principal Adjustment; provided, however, if the Class B-5 Certificates are
the most subordinate Certificates outstanding, the Class B-5 Principal Balance
will equal the difference, if any, between the Aggregate Adjusted Pool Amount as
of the preceding Distribution Date less the sum of the Aggregate Class A
Principal Balance, the Class B-1 Principal Balance, the Class B-2 Principal
Balance, the Class B-3 Principal Balance and the Class B-4 Principal Balance as
of such Determination Date.

            Class B-5 Principal Distribution Amount: As to any Distribution
Date, any amount distributable to the Holders of the Class B-5 Certificates
pursuant to Paragraph fifteenth of Section 4.01(a)(ii).

            Class B-5 Unpaid Interest Shortfall: As to any Distribution Date,
the amount, if any, by which the aggregate of the Class B-5 Interest Shortfall
Amounts for prior Distribution Dates is in excess of the amounts distributed in
respect of the Class B-5 Certificates on prior Distribution Dates pursuant to
Paragraph fourteenth of Section 4.01(a)(ii).

            Class B-6 Certificate: Any one of the Certificates executed by the
Trustee and authenticated by the Trustee or the Authenticating Agent in
substantially the form set forth in Exhibit B-6 and Exhibit C hereto.

             Class B-6 Certificateholder: The registered holder of a Class B-6
Certificate.

            Class B-6 Distribution Amount: As to any Distribution Date, any
amount distributable to the Holders of the Class B-6 Certificates pursuant to
Paragraphs sixteenth, seventeenth and eighteenth of Section 4.01(a)(ii).

            Class B-6 Interest Shortfall Amount: As to any Distribution Date,
any amount by which the Interest Accrual Amount of the Class B-6 Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-6 Certificates on such Distribution Date pursuant to Paragraph
sixteenth of Section 4.01(a)(ii).

            Class B-6 Loan Group I Optimal Principal Amount: As to any
Distribution Date, the Class B-6 Optimal Principal Amount calculated only with
respect to Group I Mortgage Loans and without regard to the proviso thereto.

            Class B-6 Loan Group II Optimal Principal Amount: As to any
Distribution Date, the Class B-6 Optimal Principal Amount calculated only with
respect to Group II Mortgage Loans and without regard to the proviso thereto.

            Class B-6 Optimal Principal Amount: As to any Distribution Date and
each Outstanding Mortgage Loan, an amount equal to the sum of

(I) the sum of:

            (i) the Group I Class B-6 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-6 Percentage (with respect to
      each such Group II Mortgage Loan) of the principal portion of the Monthly
      Payment due on the Due Date occurring in the month of such Distribution
      Date on such Mortgage Loan;

            (ii) the Group I Class B-6 Prepayment Percentage (with respect to
      each such Group I Mortgage Loan) or Group II Class B-6 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of all
      Unscheduled Principal Receipts (other than Recoveries) that were received
      by a Servicer with respect to such Mortgage Loan during the Applicable
      Unscheduled Principal Receipt Period relating to such Distribution Date
      for each applicable type of Unscheduled Principal Receipt;

            (iii) the Group I Class B-6 Prepayment Percentage (with respect to
      each such Group I Mortgage Loan) or Group II Class B-6 Prepayment
      Percentage (with respect to each such Group II Mortgage Loan) of the
      Scheduled Principal Balance of such Mortgage Loan which, during the one
      month period ending on the day preceding the Determination Date for such
      Distribution Date, was repurchased by the Seller pursuant to Section 2.02
      or 2.03; and

            (iv) the Group I Class B-6 Percentage (with respect to each such
      Group I Mortgage Loan) or Group II Class B-6 Percentage (with respect to
      each such Group II Mortgage Loan) of the excess of the unpaid principal
      balance of such Mortgage Loan substituted for a Mortgage Loan during the
      one month period ending on the day preceding the Determination Date for
      such Distribution Date over the unpaid principal balance of such Mortgage
      Loan, less the amount allocable to the principal portion of any
      unreimbursed Periodic Advances previously made by the applicable Servicer,
      the Master Servicer or the Trustee in respect of such Mortgage Loan; and

(II) the Group I Class B-6 Prepayment Percentage or Group II Class B-6
Prepayment Percentage, as applicable, of the Recovery for such Distribution
Date;

provided, however, that if an Optimal Adjustment Event occurs with respect to
such Class and such Distribution Date, the Class B-6 Optimal Principal Amount
will equal the lesser of (A) the Class B-6 Optimal Principal Amount calculated
as described in the preceding provisions and (B) the Adjusted Principal Balance
for the Class B-6 Certificates.

            Class B-6 Principal Balance: As to the first Determination Date, the
Original Class B-6 Principal Balance. As of any subsequent Determination Date,
the Original Class B-6 Principal Balance less the sum of all amounts previously
distributed in respect of the Class B-6 Certificates on prior Distribution Dates
pursuant to Paragraph eighteenth of Section 4.01(a)(ii); provided, however, if
the Class B-6 Certificates are outstanding, the Class B-6 Principal Balance will
equal the difference, if any, between the Aggregate Adjusted Pool Amount as of
the preceding Distribution Date less the sum of the Aggregate Class A Principal
Balance, the Class B-1 Principal Balance, the Class B-2 Principal Balance, the
Class B-3 Principal Balance, the Class B-4 Principal Balance and the Class B-5
Principal Balance as of such Determination Date.

            Class B-6 Principal Distribution Amount: As to any Distribution
Date, any amount distributable to the Holders of the Class B-6 Certificates
pursuant to Paragraph eighteenth of Section 4.01(a)(ii).

            Class B-6 Unpaid Interest Shortfall: As to any Distribution Date,
the amount, if any, by which the aggregate of the Class B-6 Interest Shortfall
Amounts for prior Distribution Dates is in excess of the amounts distributed in
respect of the Class B-6 Certificates on prior Distribution Dates pursuant to
Paragraph seventeenth of Section 4.01(a)(ii).

            Clearing Agency: An organization registered as a "clearing agency"
pursuant to Section 17A of the Exchange Act. The initial Clearing Agency shall
be The Depository Trust Company.

            Clearing Agency Participant: A broker, dealer, bank, financial
institution or other Person for whom a Clearing Agency effects book-entry
transfers of securities deposited with the Clearing Agency.

            Closing Date: The date of initial issuance of the Certificates, as
set forth in Section 11.14.

            Code: The Internal Revenue Code of 1986, as it may be amended from
time to time, any successor statutes thereto, and applicable U.S. Department of
the Treasury temporary or final regulations promulgated thereunder.

            Compensating Interest: With respect to any Distribution Date, the
least of (a) the aggregate Prepayment Interest Shortfall on the Mortgage Loans
for such Distribution Date, (b) the product of (i) 1/12th of 0.20% and (ii) the
Pool Scheduled Principal Balance for such Distribution Date and (c) the
Available Master Servicing Compensation for such Distribution Date.

            Co-op Shares: Shares issued by private non-profit housing
corporations.

            Corporate Trust Office: The principal office of the Trustee at which
at any particular time its corporate trust business shall be administered, which
office, at the date of the execution of this instrument, is located at 401 South
Tryon Street, Charlotte, North Carolina 28288.

            Current Group I-A Interest Distribution Amount: As to any
Distribution Date, the amount distributed in respect of the Classes of Group I-A
Certificates pursuant to Paragraph first clause (A) of Section 4.01(a)(i) on
such Distribution Date.

            Current Group II-A Interest Distribution Amount: As to any
Distribution Date, the amount distributed in respect of the Classes of Group
II-A Certificates pursuant to Paragraph first clause (B) of Section 4.01(a)(i)
on such Distribution Date.

            Current Class B Interest Distribution Amount: As to any Distribution
Date, the amount distributed in respect of the Classes of Class B Certificates
pursuant to Paragraphs first, fourth, seventh, tenth, thirteenth and sixteenth
of Section 4.01(a)(ii) on such Distribution Date.

            Current Class B-1 Fractional Interest: As to any Distribution Date
subsequent to the first Distribution Date, the percentage obtained by dividing
the sum of the Principal Balances of the Class B-2, Class B-3, Class B-4, Class
B-5 and Class B-6 Certificates by the Aggregate Principal Balance. As to the
first Distribution Date, the Original Class B-1 Fractional Interest.

            Current Class B-2 Fractional Interest: As to any Distribution Date
subsequent to the first Distribution Date, the percentage obtained by dividing
the sum of the Principal Balances of the Class B-3, Class B-4, Class B-5 and
Class B-6 Certificates by the Aggregate Principal Balance. As to the first
Distribution Date, the Original Class B-2 Fractional Interest.

            Current Class B-3 Fractional Interest: As to any Distribution Date
subsequent to the first Distribution Date, the percentage obtained by dividing
the sum of the Principal Balances of the Class B-4, Class B-5 and Class B-6
Certificates by the by the Aggregate Principal Balance. As to the first
Distribution Date, the Original Class B-3 Fractional Interest.

            Current Class B-4 Fractional Interest: As to any Distribution Date
subsequent to the first Distribution Date, the percentage obtained by dividing
the sum of the Principal Balances of the Class B-5 and Class B-6 Certificates by
the Aggregate Principal Balance. As to the first Distribution Date, the Original
Class B-4 Fractional Interest.

            Current Class B-5 Fractional Interest: As to any Distribution Date
subsequent to the first Distribution Date, the percentage obtained by dividing
the Principal Balance of the Class B-6 Certificates by the Aggregate Principal
Balance. As to the first Distribution Date, the Original Class B-5 Fractional
Interest.

            Curtailment: Any Principal Prepayment made by a Mortgagor which is
not a Prepayment in Full.

             Curtailment Interest Shortfall: On any Distribution Date with
respect to a Mortgage Loan which was the subject of a Curtailment:

            (A)    in the case where the Applicable Unscheduled Principal Receipt
                  Period is the Mid-Month Receipt Period and such Curtailment is
                  received by the Servicer on or after the Determination Date in
                  the month preceding the month of such Distribution Date but
                  prior to the first day of the month of such Distribution Date,
                  the amount of interest that would have accrued at the Net
                  Mortgage Interest Rate on the amount of such Curtailment from
                  the day of its receipt or, if earlier, its application by the
                  Servicer through the last day of the month preceding the month
                  of such Distribution Date; and

            (B)    in the case where the Applicable Unscheduled Principal Receipt
                  Period is the Prior Month Receipt Period and such Curtailment
                  is received by the Servicer during the month preceding the
                  month of such Distribution Date, the amount of interest that
                  would have accrued at the Net Mortgage Interest Rate on the
                  amount of such Curtailment from the day of its receipt or, if
                  earlier, its application by the Servicer through the last day
                  of the month in which such Curtailment is received.

             Custodial Agreement: The Custodial Agreement, dated as of December
17, 2004, among the Custodian, the Seller, the Master Servicer and the Trustee,
which agreement is attached hereto as Exhibit E, as the same may be amended or
modified from time to time in accordance with the terms thereof.

            Custodial P&I Account: The Custodial P&I Account, as defined in each
of the Servicing Agreements, with respect to the Mortgage Loans. In determining
whether the Custodial P&I Account under any Servicing Agreement is "acceptable"
to the Master Servicer (as may be required by the definition of "Eligible
Account" contained in the Servicing Agreements), the Master Servicer shall
require that any such account shall be acceptable to each of the Rating
Agencies.

            Custodian: Wells Fargo Bank, or its successor in interest under the
Custodial Agreement. Initially, the custodial functions shall be performed by
the Corporate Trust Services division of Wells Fargo Bank.

            Cut-Off Date: The first day of the month of initial issuance of the
Certificates as set forth in Section 11.01.

            Cut-Off Date Aggregate Principal Balance: The aggregate of the
Cut-Off Date Principal Balances of the Mortgage Loans is as set forth in Section
11.02.

             Cut-Off Date Principal Balance: As to each Mortgage Loan, its unpaid
principal balance as of the close of business on the Cut-Off Date (but without
giving effect to any Unscheduled Principal Receipts received or applied on the
Cut-Off Date), reduced by all payments of principal due on or before the Cut-Off
Date and not paid, and increased by scheduled monthly payments of principal due
after the Cut-Off Date but received by the related Servicer on or before the
Cut-Off Date.

            Debt Service Reduction: With respect to any Mortgage Loan, a
reduction in the scheduled Monthly Payment for such Mortgage Loan by a court of
competent jurisdiction in a proceeding under the Bankruptcy Code, except such a
reduction constituting a Deficient Valuation.

            Deficient Valuation: With respect to any Mortgage Loan, a valuation
by a court of competent jurisdiction of the Mortgaged Property in an amount less
than the then-outstanding indebtedness under the Mortgage Loan, or any reduction
in the amount of principal to be paid in connection with any scheduled Monthly
Payment that results in a permanent forgiveness of principal, which valuation or
reduction results from a proceeding under the Bankruptcy Code.

            Definitive Certificates: As defined in Section 5.01(b).

            Denomination: The amount, if any, specified on the face of each
Certificate representing the principal portion of the Cut-Off Date Aggregate
Principal Balance evidenced by such Certificate.

            Determination Date: The 17th day of the month in which the related
Distribution Date occurs, or if such 17th day is not a Business Day, the
Business Day preceding such 17th day.

            Distribution Date: The 25th day of any month, beginning in the month
following the month of initial issuance of the Certificates, or if such 25th day
is not a Business Day, the Business Day following such 25th day.

            Distribution Date Statement: As defined in Section 4.03(a).

            Document Transfer Event: The 60th day following the day on which
either (i) Wells Fargo Bank is no longer the Servicer of any of the Mortgage
Loans or (ii) the senior, unsecured long-term debt rating of Wells Fargo &
Company is less than "BBB-" by Fitch.

            Due Date: With respect to any Mortgage Loan, the day of the month in
which the Monthly Payment on such Mortgage Loan is scheduled to be paid.

            Eligible Account: One or more accounts (i) that are maintained with
a depository institution (which may be the Master Servicer) whose long-term debt
obligations (or, in the case of a depository institution which is part of a
holding company structure, the long-term debt obligations of such parent holding
company) at the time of deposit therein are rated at least "AA" (or the
equivalent) by each Rating Agency, (ii) the deposits in which are fully insured
by the FDIC through either the Bank Insurance Fund or the Savings Association
Insurance Fund, (iii) the deposits in which are insured by the FDIC through
either the Bank Insurance Fund or the Savings Association Insurance Fund (to the
limit established by the FDIC) and the uninsured deposits in which accounts are
otherwise secured, as evidenced by an Opinion of Counsel delivered to the
Trustee, such that the Trustee, on behalf of the Certificateholders has a claim
with respect to the funds in such accounts or a perfected first security
interest against any collateral securing such funds that is superior to claims
of any other depositors or creditors of the depository institution with which
such accounts are maintained, (iv) that are trust accounts maintained with the
trust department of a federal or state chartered depository institution or trust
company acting in its fiduciary capacity or (v) such other account that is
acceptable to each of the Rating Agencies and would not cause the Trust Estate
to fail to qualify as two separate REMICs or result in the imposition of any
federal tax on either the Upper-Tier REMIC or the Lower-Tier REMIC.

            Eligible Investments: At any time, any one or more of the following
obligations and securities which shall mature not later than the Business Day
preceding the Distribution Date next succeeding the date of such investment,
provided that such investments continue to qualify as "cash flow investments" as
defined in Code Section 860G(a)(6):

            (i) obligations of the United States of America or any agency
      thereof, provided such obligations are backed by the full faith and credit
      of the United States of America;

             (ii) general obligations of or obligations guaranteed by any state
      of the United States of America or the District of Columbia receiving the
      highest short-term or highest long-term rating of each Rating Agency, or
      such lower rating as would not result in the downgrading or withdrawal of
      the rating then assigned to any of the Certificates by either Rating
      Agency or result in any of such rated Certificates being placed on credit
      review status (other than for possible upgrading) by either Rating Agency;

            (iii) commercial or finance company paper which is then rated in the
      highest long-term commercial or finance company paper rating category of
      each Rating Agency or the highest short-term rating category of each
      Rating Agency, or such lower rating category as would not result in the
      downgrading or withdrawal of the rating then assigned to any of the
      Certificates by either Rating Agency or result in any of such rated
      Certificates being placed on credit review status (other than for possible
      upgrading) by either Rating Agency;

            (iv) certificates of deposit, demand or time deposits, federal funds
      or banker's acceptances issued by any depository institution or trust
      company incorporated under the laws of the United States or of any state
      thereof and subject to supervision and examination by federal and/or state
      banking authorities, provided that the commercial paper and/or debt
      obligations of such depository institution or trust company (or in the
      case of the principal depository institution in a holding company system,
      the commercial paper or debt obligations of such holding company) are then
      rated in the highest short-term or the highest long-term rating category
      for such securities of each of the Rating Agencies, or such lower rating
      categories as would not result in the downgrading or withdrawal of the
      rating then assigned to any of the Certificates by either Rating Agency or
      result in any of such rated Certificates being placed on credit review
      status (other than for possible upgrading) by either Rating Agency;

            (v) guaranteed reinvestment agreements issued by any bank, insurance
      company or other corporation acceptable to each Rating Agency at the time
      of the issuance of such agreements;

            (vi) repurchase agreements on obligations with respect to any
      security described in clauses (i) or (ii) above or any other security
      issued or guaranteed by an agency or instrumentality of the United States
      of America, in either case entered into with a depository institution or
      trust company (acting as principal) described in (iv) above;

             (vii) securities (other than stripped bonds or stripped coupon
      securities) bearing interest or sold at a discount issued by any
      corporation incorporated under the laws of the United States of America or
      any state thereof which, at the time of such investment or contractual
      commitment providing for such investment, are then rated in the highest
      short-term or the highest long-term rating category by each Rating Agency,
      or in such lower rating category as would not result in the downgrading or
      withdrawal of the rating then assigned to any of the Certificates by
      either Rating Agency or result in any of such rated Certificates being
      placed on credit review status (other than for possible upgrading) by
       either Rating Agency;

            (viii) such other investments acceptable to each Rating Agency as
      would not result in the downgrading of the rating then assigned to the
      Certificates by either Rating Agency or result in any of such rated
       Certificates being placed on credit review status (other than for possible
      upgrading) by either Rating Agency; and

            (ix) any mutual fund, money market fund, common trust fund or other
      pooled investment vehicle, the assets of which are limited to instruments
      that otherwise would constitute Eligible Investments hereunder, including
      any such fund that is managed by the Trustee or Master Servicer or any
      affiliate of the Trustee or Master Servicer or for which the Trustee or
      Master Servicer or any of its affiliates acts as an adviser as long as
      such fund is rated in at least the highest rating category by each Rating
      Agency.

            In no event shall an instrument be an Eligible Investment if such
instrument evidences either (i) a right to receive only interest payments with
respect to the obligations underlying such instrument, or (ii) both principal
and interest payments derived from obligations underlying such instrument and
the interest and principal payments with respect to such instrument provide a
yield to maturity at the date of investment of greater than 120% of the yield to
maturity at par of such underlying obligations.

            ERISA: The Employee Retirement Income Security Act of 1974, as
amended.

            ERISA Prohibited Holder: As defined in Section 5.02(d).

            Errors and Omissions Policy: As defined in each of the Servicing
Agreements.

            Event of Default: Any of the events specified in Section 7.01.

             Exchange Act: The Securities Exchange Act of 1934, as amended.

            FDIC: The Federal Deposit Insurance Corporation or any successor
thereto.

            Fidelity Bond: As defined in each of the Servicing Agreements.

            Final Distribution Date: The Distribution Date on which the final
distribution in respect of the Certificates is made pursuant to Section 9.01.

            Final Scheduled Maturity Date: The Final Scheduled Maturity Date for
each Class of Certificates is January 25, 2035, which corresponds to the "latest
possible maturity date" for purposes of Section 860G(a)(1) of the Internal
Revenue Code of 1986, as amended.

            Fitch: Fitch Ratings or its successor in interest.

            Full Unscheduled Principal Receipt: Any Unscheduled Principal
Receipt with respect to a Mortgage Loan (i) in the amount of the outstanding
principal balance of such Mortgage Loan and resulting in the full satisfaction
of such Mortgage Loan or (ii) representing Liquidation Proceeds other than
Partial Liquidation Proceeds.

            Gross Margin: As to each Mortgage Loan, the fixed percentage set
forth in the related Mortgage Note and indicated in the Mortgage Loan Schedule
as the "Gross Margin," which percentage is added to the Index on each Adjustment
Date to determine (subject to rounding, the Periodic Cap and the Rate Ceiling)
the Mortgage Interest Rate on such Mortgage Loan until the next Adjustment Date.

            Group: The Group I-A Certificates or the Group II-A Certificates.

            Group Subordinate Amount: Either of the Group I Subordinate Amount
or Group II Subordinate Amount.

            Group A Principal Balance: Either of the Group I-A Principal Balance
or Group II-A Principal Balance.

            Group I Adjusted Pool Amount: With respect to any Distribution Date,
the aggregate of the Cut-Off Date Principal Balances of the Group I Mortgage
Loans minus the sum of (i) all amounts in respect of principal received in
respect of the Group I Mortgage Loans (including, without limitation, amounts
received as Monthly Payments, Periodic Advances, Unscheduled Principal Receipts
and Substitution Principal Amounts) and distributed to Holders of the
Certificates on such Distribution Date and all prior Distribution Dates, (ii)
the principal portion of all Liquidated Loan Losses incurred on such Group I
Mortgage Loans for which the Liquidation Proceeds were received from the Cut-Off
Date through the end of the Applicable Unscheduled Principal Receipt Period with
respect to Full Unscheduled Principal Receipts for such Distribution Date and
(iii) the principal portion of all Bankruptcy Losses (other than Debt Service
Reductions) incurred on the Group I Mortgage Loans from the Cut-Off Date through
the end of the period corresponding to the Applicable Unscheduled Principal
Receipt Period with respect to Full Unscheduled Principal Receipts for such
Distribution Date.

            Group I Apportioned Principal Balance: As to any Distribution Date
and any Class of Class B Certificates, an amount equal to the product of (i) the
Principal Balance of the Class of Class B Certificates and (ii) a fraction, the
numerator of which is the Group I Subordinate Amount and the denominator of
which is the sum of the Group I Subordinate Amount and the Group II Subordinate
Amount.

            Group I Class B Percentage: Any of the Group I Class B-1 Percentage,
Group I Class B-2 Percentage, Group I Class B-3 Percentage, Group I Class B-4
Percentage, Group I Class B-5 Percentage or Group I Class B-6 Percentage.

            Group I Class B Prepayment Percentage: Any of the Group I Class B-1
Prepayment Percentage, Group I Class B-2 Prepayment Percentage, Group I Class
B-3 Prepayment Percentage, Group I Class B-4 Prepayment Percentage, Group I
Class B-5 Prepayment Percentage or Group I Class B-6 Prepayment Percentage.

            Group I Class B-1 Percentage: As to any Distribution Date, the
percentage calculated by multiplying the Group I Subordinated Percentage by a
fraction, the numerator of which is the Class B-1 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is the Class B Principal Balance.

            Group I Class B-1 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group I Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-1 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-1 Certificates are the only
Class B Certificates eligible to receive such unscheduled principal
distributions in accordance with Section 4.01(d)(i), the Group I Class B-1
Prepayment Percentage for such unscheduled principal distributions for such
Distribution Date will be one.

            Group I Class B-2 Percentage: As to any Distribution Date, the
percentage calculated by multiplying (i) the Group I Subordinated Percentage by
(ii) a fraction, the numerator of which is the Class B-2 Principal Balance
(determined as of the Determination Date preceding such Distribution Date) and
the denominator of which is the Class B Principal Balance.

            Group I Class B-2 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group I Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-2 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-2 Certificates are not
eligible to receive such unscheduled principal distributions in accordance with
Section 4.01(d)(i), the Group I Class B-2 Prepayment Percentage for such
unscheduled principal distributions for such Distribution Date will be zero.

            Group I Class B-3 Percentage: As to any Distribution Date, the
percentage calculated by multiplying (i) the Group I Subordinated Percentage by
(ii) a fraction, the numerator of which is the Class B-3 Principal Balance
(determined as of the Determination Date preceding such Distribution Date) and
the denominator of which is the Class B Principal Balance.

            Group I Class B-3 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group I Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-3 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-3 Certificates are not
eligible to receive such unscheduled principal distributions in accordance with
Section 4.01(d)(i), the Group I Class B-3 Prepayment Percentage for such
unscheduled principal distributions for such Distribution Date will be zero.

            Group I Class B-4 Percentage: As to any Distribution Date, the
percentage calculated by multiplying (i) the Group I Subordinated Percentage by
(ii) a fraction, the numerator of which is the Class B-4 Principal Balance
(determined as of the Determination Date preceding such Distribution Date) and
the denominator of which is the Class B Principal Balance.

            Group I Class B-4 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group I Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-4 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-4 Certificates are not
eligible to receive such unscheduled principal distributions in accordance with
Section 4.01(d)(i), the Group I Class B-4 Prepayment Percentage for such
unscheduled principal distributions for such Distribution Date will be zero.

            Group I Class B-5 Percentage: As to any Distribution Date, the
percentage calculated by multiplying (i) the Group I Subordinated Percentage by
(ii) a fraction, the numerator of which is the Class B-5 Principal Balance
(determined as of the Determination Date preceding such Distribution Date) and
the denominator of which is the Class B Principal Balance.

            Group I Class B-5 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group I Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-5 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-5 Certificates are not
eligible to receive such unscheduled principal distributions in accordance with
Section 4.01(d)(i), the Group I Class B-5 Prepayment Percentage for such
unscheduled principal distributions for such Distribution Date will be zero.

            Group I Class B-6 Percentage: As to any Distribution Date, the
percentage calculated by multiplying (i) the Group I Subordinated Percentage by
(ii) a fraction, the numerator of which is the Class B-6 Principal Balance
(determined as of the Determination Date preceding such Distribution Date) and
the denominator of which is the Class B Principal Balance.

            Group I Class B-6 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group I Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-6 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-6 Certificates are not
eligible to receive such unscheduled principal distributions in accordance with
Section 4.01(d)(i), the Group I Class B-6 Prepayment Percentage for such
unscheduled principal distributions for such Distribution Date will be zero.

            Group I Mortgage Loans: Those Mortgage Loans listed on Exhibit F-1A
attached hereto.

            Group I Pool Balance: As to any Distribution Date, the aggregate
Scheduled Principal Balances of all Group I Mortgage Loans that were Outstanding
Mortgage Loans on the Due Date in the month preceding the month of such
Distribution Date.

            Group I Pool Distribution Amount: As of any Distribution Date, the
funds eligible for distribution to the Group I-A Certificates and Class B
Certificates on such Distribution Date, which shall be the sum of (i) all
previously undistributed payments or other receipts on account of principal and
interest on or in respect of the Group I Mortgage Loans (including, without
limitation, the proceeds of any repurchase of a Group I Mortgage Loan by the
Seller and any Substitution Principal Amount) received by the Master Servicer
with respect to the applicable Remittance Date in the month of such Distribution
Date and any Unscheduled Principal Receipts received by the Master Servicer on
or prior to the Business Day preceding such Distribution Date, (ii) all Periodic
Advances made with respect to Group I Mortgage Loans by a Servicer pursuant to
the related Servicing Agreement or Periodic Advances with respect to Group I
Mortgage Loans made by the Master Servicer or the Trustee pursuant to Section
3.03, (iii) any remaining Reimbursement Amount as provided in Section 4.01(a)
and (iv) all other amounts (including any Insurance Proceeds and Compensating
Interest) with respect to a Group I Mortgage Loan required to be placed in the
Certificate Account by the Servicer on or before the applicable Remittance Date
or by the Master Servicer or the Trustee on or prior to the Distribution Date,
but excluding the following:

            (a) amounts received as late payments of principal or interest with
      respect to a Group I Mortgage Loan and respecting which the Master
      Servicer or the Trustee has made one or more unreimbursed Periodic
      Advances;

            (b) the portion of Liquidation Proceeds used to reimburse any
      unreimbursed Periodic Advances with respect to a Group I Mortgage Loan by
      the Master Servicer or the Trustee;

            (c) that portion of each payment of interest on a particular Group I
      Mortgage Loan which represent (i) the applicable Servicing Fee and (ii)
      the Master Servicing Fee;

            (d) all amounts representing scheduled payments of principal and
      interest on Group I Mortgage Loans due after the Due Date occurring in the
      month in which such Distribution Date occurs;

            (e) all Unscheduled Principal Receipts received by the Servicers
      with respect to Group I Mortgage Loans after the Applicable Unscheduled
      Principal Receipt Period relating to the Distribution Date for the
       applicable type of Unscheduled Principal Receipt, and all related payments
      of interest on such amounts;

            (f) all repurchase proceeds with respect to Group I Mortgage Loans
      repurchased by the Seller pursuant to Section 2.02, 2.03 or 3.08 on or
      following the Determination Date in the month in which such Distribution
      Date occurs and the difference between the unpaid principal balance of a
      Group I Mortgage Loan substituted for a Group I Mortgage Loan pursuant to
       Section 2.02, 2.03 or 2.06 on or following the Determination Date in the
      month in which such Distribution Date occurs and the unpaid principal
      balance of such Group I Mortgage Loan;

            (g) that portion of Liquidation Proceeds and REO Proceeds with
      respect to any Group I Mortgage Loan which represents any unpaid Servicing
      Fee or Master Servicing Fee;

            (h) all income from Eligible Investments that is held in the
      Certificate Account for the account of the Master Servicer;

            (i) Liquidation Profits in respect of Group I Mortgage Loans;

            (j) Month End Interest in respect of Group I Mortgage Loans;

            (k) all amounts reimbursable to a Servicer for PMI Advances in
      respect of Group I Mortgage Loans; and

            (l) all other amounts permitted to be withdrawn from the Certificate
      Account, to the extent not covered by clauses (a) through (k) above, or
      not required to be deposited in the Certificate Account under this
      Agreement.

            Group I Subordinate Amount: As to any Distribution Date, the excess
of (i) the Group I Pool Balance over (ii) the Group I-A Principal Balance.

            Group I Subordinated Percentage: As to any Distribution Date, the
percentage which is the difference between 100% and the Group I-A Percentage for
such date.

            Group I Subordinated Prepayment Percentage: As to any Distribution
Date, the percentage which is the difference between 100% and the Group I-A
Prepayment Percentage for such date.

            Group II Adjusted Pool Amount: With respect to any Distribution
Date, the aggregate of the Cut-Off Date Principal Balances of the Group II
Mortgage Loans minus the sum of (i) all amounts in respect of principal received
in respect of the Group II Mortgage Loans (including, without limitation,
amounts received as Monthly Payments, Periodic Advances, Unscheduled Principal
Receipts and Substitution Principal Amounts) and distributed to Holders of the
Certificates on such Distribution Date and all prior Distribution Dates, (ii)
the principal portion of all Liquidated Loan Losses incurred on such Group II
Mortgage Loans for which the Liquidation Proceeds were received from the Cut-Off
Date through the end of Applicable Unscheduled Principal Receipt Period with
respect to Full Unscheduled Principal Receipts for such Distribution Date and
(iii) the principal portion of all Bankruptcy Losses (other than Debt Service
Reductions) incurred on the Group II Mortgage Loans from the Cut-Off Date
through the end of the period corresponding to the Applicable Unscheduled
Principal Receipt Period with respect to Full Unscheduled Principal Receipts for
such Distribution Date.

            Group II Apportioned Principal Balance: As to any Distribution Date
and any Class of Class B Certificates, an amount equal to the product of (i) the
Principal Balance of the Class of Class B Certificates and (ii) a fraction, the
numerator of which is the Group II Subordinate Amount and the denominator of
which is the sum of the Group I Subordinate Amount and Group II Subordinate
Amount.

            Group II Class B Percentage: Any of the Group II Class B-1
Percentage, Group II Class B-2 Percentage, Group II Class B-3 Percentage, Group
II Class B-4 Percentage, Group II Class B-5 Percentage or Group II Class B-6
Percentage.

            Group II Class B Prepayment Percentage: Any of the Group II Class
B-1 Prepayment Percentage, Group II Class B-2 Prepayment Percentage, Group II
Class B-3 Prepayment Percentage, Group II Class B-4 Prepayment Percentage, Group
II Class B-5 Prepayment Percentage or Group II Class B-6 Prepayment Percentage.

            Group II Class B-1 Percentage: As to any Distribution Date, the
percentage calculated by multiplying (i) the Group II Subordinated Percentage by
(ii) a fraction, the numerator of which is the Class B-1 Principal Balance
(determined as of the Determination Date preceding such Distribution Date) and
the denominator of which is the Class B Principal Balance.

             Group II Class B-1 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group II Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-1 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-1 Certificates are the only
Class B Certificates eligible to receive such unscheduled principal
distributions in accordance with Section 4.01(d)(i), the Group II Class B-1
Prepayment Percentage for such unscheduled principal distributions for such
Distribution Date will be one.

            Group II Class B-2 Percentage: As to any Distribution Date, the
percentage calculated by multiplying (i) the Group II Subordinated Percentage by
(ii) a fraction, the numerator of which is the Class B-2 Principal Balance
(determined as of the Determination Date preceding such Distribution Date) and
the denominator of which is the Class B Principal Balance.

            Group II Class B-2 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group II Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-2 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-2 Certificates are not
eligible to receive such unscheduled principal distributions in accordance with
Section 4.01(d)(i), the Group II Class B-2 Prepayment Percentage for such
unscheduled principal distributions for such Distribution Date will be zero.

            Group II Class B-3 Percentage: As to any Distribution Date, the
percentage calculated by multiplying (i) the Group II Subordinated Percentage by
(ii) a fraction, the numerator of which is the Class B-3 Principal Balance
(determined as of the Determination Date preceding such Distribution Date) and
the denominator of which is the Class B Principal Balance.

            Group II Class B-3 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group II Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-3 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-3 Certificates are not
eligible to receive such unscheduled principal distributions in accordance with
Section 4.01(d)(i), the Group II Class B-3 Prepayment Percentage for such
unscheduled principal distributions for such Distribution Date will be zero.

            Group II Class B-4 Percentage: As to any Distribution Date, the
percentage calculated by multiplying (i) the Group II Subordinated Percentage by
(ii) a fraction, the numerator of which is the Class B-4 Principal Balance
(determined as of the Determination Date preceding such Distribution Date) and
the denominator of which is the Class B Principal Balance.

            Group II Class B-4 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group II Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-4 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-4 Certificates are not
eligible to receive such unscheduled principal distributions in accordance with
Section 4.01(d)(i), the Group II Class B-4 Prepayment Percentage for such
unscheduled principal distributions for such Distribution Date will be zero.

            Group II Class B-5 Percentage: As to any Distribution Date, the
percentage calculated by multiplying (i) the Group II Subordinated Percentage by
(ii) a fraction, the numerator of which is the Class B-5 Principal Balance
(determined as of the Determination Date preceding such Distribution Date) and
the denominator of which is the Class B Principal Balance.

            Group II Class B-5 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group II Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-5 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-5 Certificates are not
eligible to receive such unscheduled principal distributions in accordance with
Section 4.01(d)(i), the Group II Class B-5 Prepayment Percentage for such
unscheduled principal distributions for such Distribution Date will be zero.

            Group II Class B-6 Percentage: As to any Distribution Date, the
percentage calculated by multiplying (i) the Group II Subordinated Percentage by
(ii) a fraction, the numerator of which is the Class B-6 Principal Balance
(determined as of the Determination Date preceding such Distribution Date) and
the denominator of which is the Class B Principal Balance.

            Group II Class B-6 Prepayment Percentage: As to any Distribution
Date, except as set forth in the next sentence, the percentage calculated by
multiplying (i) the Group II Subordinated Prepayment Percentage by (ii) a
fraction, the numerator of which is the Class B-6 Principal Balance (determined
as of the Determination Date preceding such Distribution Date) and the
denominator of which is (a) for the purpose of allocating Liquidation Proceeds
(other than Partial Liquidation Proceeds), the Class B Principal Balance and (b)
for the purpose of allocating all other unscheduled principal distributions, the
Principal Balances of the Classes of Class B Certificates eligible to receive
such unscheduled principal distributions for such Distribution Date in
accordance with the provisions of Section 4.01(d). Except as set forth in
Section 4.01(d)(ii), in the event that the Class B-6 Certificates are not
eligible to receive such unscheduled principal distributions in accordance with
Section 4.01(d)(i), the Group II Class B-6 Prepayment Percentage for such
unscheduled principal distributions for such Distribution Date will be zero.

            Group II Mortgage Loans: Those Mortgage Loans listed on Exhibit F-1B
attached hereto.

            Group II Pool Balance: As to any Distribution Date, the aggregate
Scheduled Principal Balances of all Group II Mortgage Loans that were
Outstanding Mortgage Loans on the Due Date in the month preceding the month of
such Distribution Date.

            Group II Pool Distribution Amount: As of any Distribution Date, the
funds eligible for distribution to the Group II-A Certificates and Class B
Certificates on such Distribution Date, which shall be the sum of (i) all
previously undistributed payments or other receipts on account of principal and
interest on or in respect of the Group II Mortgage Loans (including, without
limitation, the proceeds of any repurchase of a Group II Mortgage Loan by the
Seller and any Substitution Principal Amount) received by the Master Servicer
with respect to the applicable Remittance Date in the month of such Distribution
Date and any Unscheduled Principal Receipts received by the Master Servicer on
or prior to the Business Day preceding such Distribution Date, (ii) all Periodic
Advances made with respect to Group II Mortgage Loans by a Servicer pursuant to
the related Servicing Agreement or Periodic Advances with respect to Group II
Mortgage Loans made by the Master Servicer or the Trustee pursuant to Section
3.03, (iii) any remaining Reimbursement Amount as provided in Section 4.01(a)
and (iv) all other amounts (including any Insurance Proceeds and Compensating
Interest) with respect to a Group II Mortgage Loan required to be placed in the
Certificate Account by the Servicer on or before the applicable Remittance Date
or by the Master Servicer or the Trustee on or prior to the Distribution Date,
but excluding the following:

                  (a) amounts received as late payments of principal or interest
      with respect to a Group II Mortgage Loan and respecting which the Master
      Servicer or the Trustee has made one or more unreimbursed Periodic
      Advances;

                  (b) the portion of Liquidation Proceeds used to reimburse any
      unreimbursed Periodic Advances with respect to a Group II Mortgage Loan by
      the Master Servicer or the Trustee;

                  (c) that portion of each payment of interest on a particular
      Group II Mortgage Loan which represents (i) the applicable Servicing Fee
      and (ii) the Master Servicing Fee;

                  (d) all amounts representing scheduled payments of principal
      and interest on Group II Mortgage Loans due after the Due Date occurring
      in the month in which such Distribution Date occurs;

                  (e) all Unscheduled Principal Receipts received by the
      Servicers with respect to Group II Mortgage Loans after the Applicable
      Unscheduled Principal Receipt Period relating to the Distribution Date for
      the applicable type of Unscheduled Principal Receipt, and all related
      payments of interest on such amounts;

                  (f) all repurchase proceeds with respect to Group II Mortgage
      Loans repurchased by the Seller pursuant to Section 2.02, 2.03 or 3.08 on
      or following the Determination Date in the month in which such
      Distribution Date occurs and the difference between the unpaid principal
      balance of a Group II Mortgage Loan substituted for a Group II Mortgage
      Loan pursuant to Section 2.02, 2.03 or 2.06 on or following the
      Determination Date in the month in which such Distribution Date occurs and
      the unpaid principal balance of such Group II Mortgage Loan;

                  (g) that portion of Liquidation Proceeds and REO Proceeds with
      respect to any Group II Mortgage Loan which represents any unpaid
      Servicing Fee or Master Servicing Fee;

                  (h) all income from Eligible Investments that is held in the
      Certificate Account for the account of the Master Servicer;

                  (i) Liquidation Profits in respect of Group II Mortgage Loans;

                  (j) Month End Interest in respect of Group II Mortgage Loans;

                  (k) all amounts reimbursable to a Servicer for PMI Advances in
      respect of Group II Mortgage Loans; and

                  (l) all other amounts permitted to be withdrawn from the
      Certificate Account, to the extent not covered by clauses (a) through (k)
      above, or not required to be deposited in the Certificate Account under
      this Agreement.

            Group II Subordinate Amount: As to any Distribution Date, the excess
of (i) the Group II Pool Balance over (ii) the Group II-A Principal Balance.

            Group II Subordinated Percentage: As to any Distribution Date, the
percentage which is the difference between 100% and the Group II-A Percentage
for such date.

            Group II Subordinated Prepayment Percentage: As to any Distribution
Date, the percentage which is the difference between 100% and the Group II-A
Prepayment Percentage for such date.

            Group I-A Certificate:   Any Class I-A-1 Certificate.

            Group I-A Distribution Amount: As to any Distribution Date and any
Class of Group I-A Certificates, the amount distributable to such Class of Group
I-A Certificates pursuant to Paragraphs first clause (A), second clause (A) and
third clause (A) of Section 4.01(a)(i).

            Group I-A Interest Accrual Amount: As to any Distribution Date, the
sum of the Interest Accrual Amounts for the Group I-A Certificates with respect
to such Distribution Date.

            Group I-A Interest Percentage: As to any Distribution Date and any
Class of Group I-A Certificates, the percentage calculated by dividing the
Interest Accrual Amount of such Class (determined without regard to clause (ii)
of the definition thereof) by the Group I-A Interest Accrual Amount (determined
without regard to clause (ii) of the definition of each Interest Accrual
Amount).

            Group I-A Interest Shortfall Amount: As to any Distribution Date and
any Class of Group I-A Certificates, any amount by which the Interest Accrual
Amount of such Class with respect to such Distribution Date exceeds the amount
distributed in respect of such Class on such Distribution Date pursuant to
Paragraph first clause (A) of Section 4.01(a)(i).

            Group I-A Loss Denominator: As to any Determination Date, an amount
equal to the Group I-A Principal Balance.

            Group I-A Loss Percentage: As to any Determination Date and any
Class of Group I-A Certificates, the percentage calculated by dividing the
Principal Balance of such Class by the Group I-A Loss Denominator (determined
without regard to any such Principal Balance of any Class of Group I-A
Certificates not then outstanding), in each case determined as of the preceding
Determination Date.

            Group I-A Optimal Amount: As to any Distribution Date, the sum for
such Distribution Date of (i) the Group I-A Interest Accrual Amount, (ii) the
Aggregate Group I-A Unpaid Interest Shortfall and (iii) the Group I-A Optimal
Principal Amount.

            Group I-A Optimal Principal Amount: As to any Distribution Date, an
amount equal to the sum of (I) the sum, as to each Group I Mortgage Loan that is
an Outstanding Mortgage Loan, of:

                  (i) the Group I-A Percentage of the principal portion of the
      Monthly Payment due on the Due Date occurring in the month of such
      Distribution Date on such Mortgage Loan;

                  (ii) the Group I-A Prepayment Percentage of all Unscheduled
      Principal Receipts (other than Recoveries) that were received by a
      Servicer with respect to such Mortgage Loan during the Applicable
      Unscheduled Principal Receipt Period relating to such Distribution Date
      for each applicable type of Unscheduled Principal Receipt;

                  (iii) the Group I-A Prepayment Percentage of the Scheduled
      Principal Balance of such Mortgage Loan which, during the one month period
      ending on the day preceding the Determination Date such Distribution Date,
      was repurchased by the Seller pursuant to Section 2.02 or 2.03; and

                  (iv) the Group I-A Percentage of the excess of the unpaid
      principal balance of such Mortgage Loan substituted for a Mortgage Loan
      during the one month period ending on the day preceding the Determination
      Date for such Distribution Date over the unpaid principal balance of such
      Mortgage Loan, less the amount allocable to the principal portion of any
      unreimbursed Periodic Advances previously made by the applicable Servicer,
      the Master Servicer or the Trustee in respect of such Mortgage Loan; and

      (II) the Group I-A Prepayment Percentage of the Recovery for Loan Group I
      for such Distribution Date.

            Group I-A Percentage: As to any Distribution Date occurring on or
prior to the Subordination Depletion Date, the lesser of (i) 100% and (ii) the
percentage obtained by dividing the Group I-A Principal Balance (determined as
of the Determination Date preceding such Distribution Date) by the Group I Pool
Balance. As to any Distribution Date occurring subsequent to the Subordination
Depletion Date, 100% or such lesser percentage which will cause the Group I-A
Principal Balance to decline to zero following the distribution made on such
Distribution Date.

            Group I-A Prepayment Percentage: As to any Distribution Date to and
including the Distribution Date in December 2011, 100%. As to any Distribution
Date subsequent to December 2011 to and including the Distribution Date in
December 2012, the Group I-A Percentage as of such Distribution Date plus 70% of
the Group I Subordinated Percentage as of such Distribution Date. As to any
Distribution Date subsequent to December 2012 to and including the Distribution
Date in December 2013, the Group I-A Percentage as of such Distribution Date
plus 60% of the Group I Subordinated Percentage as of such Distribution Date. As
to any Distribution Date subsequent to December 2013 to and including the
Distribution Date in December 2014, the Group I-A Percentage as of such
Distribution Date plus 40% of the Group I Subordinated Percentage as of such
Distribution Date. As to any Distribution Date subsequent to December 2014 to
and including the Distribution Date in December 2015, the Group I-A Percentage
as of such Distribution Date plus 20% of the Group I Subordinated Percentage as
of such Distribution Date. As to any Distribution Date subsequent to December
2015, the Group I-A Percentage as of such Distribution Date.

            No reduction of the level of the Group I-A Prepayment Percentage
shall occur on any Distribution Date unless, as of such Distribution Date, (A)
the average outstanding principal balance on such Distribution Date and for the
preceding five Distribution Dates of the Mortgage Loans in all Loan Groups that
were delinquent 60 days or more (including for this purpose any Mortgage Loans
in foreclosure and Mortgage Loans with respect to which the related Mortgaged
Property has been acquired by the Trust Estate) does not exceed 50% of the Class
B Principal Balance; and (B) cumulative Realized Losses on the Mortgage Loans in
all Loan Groups do not exceed the following percentages of the Original
Subordinated Principal Amount: (1) 30%, if such Distribution Date occurs between
and including January 2012 and December 2012 (2) 35%, if such Distribution Date
occurs between and including January 2013 and December 2013, (3) 40%, if such
Distribution Date occurs between and including January 2014 and December 2014,
(4) 45%, if such Distribution Date occurs between and including January 2015 and
December 2015, and (5) 50%, if such Distribution Date occurs during or after
January 2016.

            Notwithstanding the foregoing, with respect to any Distribution Date
on which the preceding criteria are not met, the reduction of the Group I-A
Prepayment Percentage described in the second through sixth sentences of this
definition of Group I-A Prepayment Percentage shall not be applicable with
respect to such Distribution Date. In such event, the Group I-A Prepayment
Percentage for such Distribution Date will be determined in accordance with the
applicable provision, as set forth in the first through fifth sentences of this
definition, which was actually used to determine the Group I-A Prepayment
Percentage for the Distribution Date occurring in the December preceding such
Distribution Date (it being understood that for the purposes of the
determination of the Group I-A Prepayment Percentage for the current
Distribution Date, the current Group I-A Percentage and Group I Subordinated
Percentage shall be utilized).

            In addition, if on any Distribution Date, prior to giving effect to
any distributions on such Distribution Date, (i) the Aggregate Subordinated
Percentage is equal to or greater than twice the Aggregate Subordinated
Percentage as of the Cut-Off Date, (ii) the average outstanding principal
balance on such Distribution Date and for the preceding five Distribution Dates
of the Mortgage Loans in all Loan Groups that were delinquent 60 days or more
(including for this purpose any Mortgage Loans in foreclosure and Mortgage Loans
with respect to which the related Mortgaged Property has been acquired by the
Trust Estate) does not exceed 50% of the Class B Principal Balance and (iii)(A)
prior to the Distribution Date in January 2008, cumulative Realized Losses on
the Mortgage Loans in all Loan Groups do not exceed 20% of the Original
Subordinated Principal Amount, then the Group I-A Prepayment Percentage for such
Distribution Date will equal the Group I-A Percentage for such Distribution Date
plus 50% of the Group I Subordinated Percentage for such Distribution Date or
(B) on or after the Distribution Date in January 2008, cumulative Realized
Losses on the Mortgage Loans in all Loan Groups do not exceed 30% of the
Original Subordinated Principal Amount, then the Group I-A Prepayment Percentage
for such Distribution Date will equal the Group I-A Percentage for such
Distribution Date.

            Notwithstanding the foregoing, if on any Distribution Date, the
Aggregate Class A Percentage exceeds such percentage as of the Cut-Off Date,
then the Group I-A Prepayment Percentage will equal 100%.

            If on any Distribution Date the allocation to the Group I-A
Certificates of Unscheduled Principal Receipts and other amounts in the
percentage required above would reduce the Group I-A Principal Balance below
zero, the Group I-A Prepayment Percentage for such Distribution Date will be
limited to the percentage necessary to reduce the Group I-A Principal Balance to
zero. In addition, once the Group I-A Principal Balance has been reduced to
zero, the Group I-A Prepayment Percentage will be 0%.

            With respect to any Distribution Date on which the Group I-A
Prepayment Percentage is reduced below the Group I-A Prepayment Percentage for
the prior Distribution Date, the Master Servicer shall certify to the Trustee,
based upon information provided by each Servicer as to the Mortgage Loans
serviced by it that the criteria set forth in this definition are met.

            Group I-A Principal Balance: As of any date, an amount equal to the
sum of the Principal Balances for the Group I-A Certificates.

            Group I-A Principal Distribution Amount: As to any Distribution
Date, the aggregate amount distributed in respect of the Classes of Group I-A
Certificates pursuant to Paragraph third clause (A) of Section 4.01(a)(i).

            Group I-A Shortfall Percentage: As to any Distribution Date and any
Class of Group I-A Certificates, the percentage calculated by dividing the Class
A Unpaid Interest Shortfall for such Class by the Aggregate Group I-A Unpaid
Interest Shortfall, in each case determined as of the day preceding the
applicable Distribution Date.

            Group II-A Certificate: Any Class II-A-1, Class II-A-2, Class
II-A-3, Class II-A-4, Class II-A-5, Class II-A-6, Class II-A-7, Class II-A-8,
Class II-A-R or Class II-A-LR Certificate.

            Group II-A Distribution Amount: As to any Distribution Date and any
Class of Group II-A Certificates, the amount distributable to such Class of
Group II-A Certificates pursuant to Paragraphs first clause (B), second clause
(B) and third clause (B) of Section 4.01(a)(i).

            Group II-A Interest Accrual Amount: As to any Distribution Date, the
sum of the Interest Accrual Amounts for the Classes of Group II-A Certificates
with respect to such Distribution Date.

            Group II-A Interest Percentage: As to any Distribution Date and any
Class of Group II-A Certificates, the percentage calculated by dividing the
Interest Accrual Amount of such Class (determined without regard to clause (ii)
of the definition thereof) by the Group II-A Interest Accrual Amount (determined
without regard to clause (ii) of the definition of each Interest Accrual
Amount).

            Group II-A Interest Shortfall Amount: As to any Distribution Date
and any Class of Group II-A Certificates, any amount by which the Interest
Accrual Amount of such Class with respect to such Distribution Date exceeds the
amount distributed in respect of such Class on such Distribution Date pursuant
to Paragraph first clause (B) of Section 4.01(a)(i).

            Group II-A Loss Denominator: As to any Determination Date, an amount
equal to the Group II-A Principal Balance.

             Group II-A Loss Percentage: As to any Determination Date and any
Class of Group II-A Certificates, the percentage calculated by dividing the
Principal Balance of such Class by the Group II-A Loss Denominator (determined
without regard to any such Principal Balance of any Class of Group II-A
Certificates not then outstanding), in each case determined as of the preceding
Determination Date.

            Group II-A Optimal Amount: As to any Distribution Date, the sum for
such Distribution Date of (i) the Group II-A Interest Accrual Amount, (ii) the
Aggregate Group II-A Unpaid Interest Shortfall and (iii) the Group II-A Optimal
Principal Amount.

            Group II-A Optimal Principal Amount: As to any Distribution Date, an
amount equal to the sum of (I) the sum, as to each Group II Mortgage Loan that
is an Outstanding Mortgage Loan, of:

                  (i) the Group II-A Percentage of the principal portion of the
      Monthly Payment due on the Due Date occurring in the month of such
      Distribution Date on such Mortgage Loan;

                  (ii) the Group II-A Prepayment Percentage of all Unscheduled
      Principal Receipts (other than Recoveries) that were received by a
      Servicer with respect to such Mortgage Loan during the Applicable
      Unscheduled Principal Receipt Period relating to such Distribution Date
      for each applicable type of Unscheduled Principal Receipt;

                  (iii) the Group II-A Prepayment Percentage of the Scheduled
      Principal Balance of such Mortgage Loan which, during the one month period
      ending on the day preceding the Determination Date for such Distribution
      Date, was repurchased by the Seller pursuant to Section 2.02 or 2.03; and

                  (iv) the Group II-A Percentage of the excess of the unpaid
      principal balance of such Mortgage Loan substituted for a Mortgage Loan
      during the one month period ending on the day preceding the Determination
      Date for such Distribution Date over the unpaid principal balance of such
      Mortgage Loan, less the amount allocable to the principal portion of any
      unreimbursed Periodic Advances previously made by the applicable Servicer,
      the Master Servicer or the Trustee in respect of such Mortgage Loan; and

       (II) the Group II-A Prepayment Percentage of the Recovery for Loan Group
      II for such Distribution Date.

            Group II-A Percentage: As to any Distribution Date occurring on or
prior to the Subordination Depletion Date, the lesser of (i) 100% and (ii) the
percentage obtained by dividing the Group II-A Principal Balance (determined as
of the Determination Date preceding such Distribution Date) by the Group II Pool
Balance. As to any Distribution Date occurring subsequent to the Subordination
Depletion Date, 100% or such lesser percentage which will cause the Group II-A
Principal Balance to decline to zero following the distribution made on such
Distribution Date.

            Group II-A Prepayment Percentage: As to any Distribution Date to and
including the Distribution Date in December 2011, 100%. As to any Distribution
Date subsequent to December 2011 to and including the Distribution Date in
December 2012, the Group II-A Percentage as of such Distribution Date plus 70%
of the Group II Subordinated Percentage as of such Distribution Date. As to any
Distribution Date subsequent to December 2012 to and including the Distribution
Date in December 2013, the Group II-A Percentage as of such Distribution Date
plus 60% of the Group II Subordinated Percentage as of such Distribution Date.
As to any Distribution Date subsequent to December 2013 to and including the
Distribution Date in December 2014, the Group II-A Percentage as of such
Distribution Date plus 40% of the Group II Subordinated Percentage as of such
Distribution Date. As to any Distribution Date subsequent to December 2014 to
and including the Distribution Date in December 2015, the Group II-A Percentage
as of such Distribution Date plus 20% of the Group II Subordinated Percentage as
of such Distribution Date. As to any Distribution Date subsequent to December
2015, the Group II-A Percentage as of such Distribution Date.

            No reduction of the level of the Group II-A Prepayment Percentage
shall occur on any Distribution Date unless, as of such Distribution Date, (A)
the average outstanding principal balance on such Distribution Date and for the
preceding five Distribution Dates of the Mortgage Loans in all Loan Groups that
were delinquent 60 days or more (including for this purpose any Mortgage Loans
in foreclosure and Mortgage Loans with respect to which the related Mortgaged
Property has been acquired by the Trust Estate) does not exceed 50% of the Class
B Principal Balance; and (B) cumulative Realized Losses on the Mortgage Loans in
all Loan Groups do not exceed the following percentages of the Original
Subordinated Principal Amount: (1) 30%, if such Distribution Date occurs between
and including January 2012 and December 2012 (2) 35%, if such Distribution Date
occurs between and including January 2013 and December 2013, (3) 40%, if such
Distribution Date occurs between and including January 2014 and December 2014,
(4) 45%, if such Distribution Date occurs between and including January 2015 and
December 2015, and (5) 50%, if such Distribution Date occurs during or after
January 2016.

            Notwithstanding the foregoing, with respect to any Distribution Date
on which the preceding criteria are not met, the reduction of the Group II-A
Prepayment Percentage described in the second through sixth sentences of this
definition of Group II-A Prepayment Percentage shall not be applicable with
respect to such Distribution Date. In such event, the Group II-A Prepayment
Percentage for such Distribution Date will be determined in accordance with the
applicable provision, as set forth in the first through fifth sentences of this
definition, which was actually used to determine the Group II-A Prepayment
Percentage for the Distribution Date occurring in the December preceding such
Distribution Date (it being understood that for the purposes of the
determination of the Group II-A Prepayment Percentage for the current
Distribution Date, the current Group II-A Percentage and Group II Subordinated
Percentage shall be utilized).

            In addition, if on any Distribution Date, prior to giving effect to
any distributions on such Distribution Date, (i) the Aggregate Subordinated
Percentage is equal to or greater than twice the Aggregate Subordinated
Percentage as of the Cut-Off Date, (ii) the average outstanding principal
balance on such Distribution Date and for the preceding five Distribution Dates
of the Mortgage Loans in all Loan Groups that were delinquent 60 days or more
(including for this purpose any Mortgage Loans in foreclosure and Mortgage Loans
with respect to which the related Mortgaged Property has been acquired by the
Trust Estate) does not exceed 50% of the Class B Principal Balance and (iii)(A)
prior to the Distribution Date in January 2008, cumulative Realized Losses on
the Mortgage Loans in all Loan Groups do not exceed 20% of the Original
Subordinated Principal Amount, then the Group II-A Prepayment Percentage for
such Distribution Date will equal the Group II-A Percentage for such
Distribution Date plus 50% of the Group II Subordinated Percentage for such
Distribution Date or (B) on or after the Distribution Date in January 2008,
cumulative Realized Losses on the Mortgage Loans in all Loan Groups do not
exceed 30% of the Original Subordinated Principal Amount, then the Group II-A
Prepayment Percentage for such Distribution Date will equal the Group II-A
Percentage for such Distribution Date.

            Notwithstanding the foregoing, if on any Distribution Date, the
Aggregate Class A Percentage exceeds such percentage as of the Cut-Off Date,
then the Group II-A Prepayment Percentage will equal 100%.

            If on any Distribution Date the allocation to the Group II-A
Certificates of Unscheduled Principal Receipts and other amounts in the
percentage required above would reduce the Group II-A Principal Balance below
zero, the Group II-A Prepayment Percentage for such Distribution Date will be
limited to the percentage necessary to reduce the Group II-A Principal Balance
to zero. In addition, once the Group II-A Principal Balance has been reduced to
zero, the Group II-A Prepayment Percentage will be 0%.

            With respect to any Distribution Date on which the Group II-A
Prepayment Percentage is reduced below the Group II-A Prepayment Percentage for
the prior Distribution Date, the Master Servicer shall certify to the Trustee,
based upon information provided by each Servicer as to the Mortgage Loans
serviced by it that the criteria set forth in this definition are met.

            Group II-A Principal Balance: As of any date, an amount equal to the
sum of the Principal Balances for the Group II-A Certificates.

            Group II-A Principal Distribution Amount: As to any Distribution
Date, the aggregate amount distributed in respect of the Classes of Group II-A
Certificates pursuant to Paragraph third clause (B) of Section 4.01(a)(i).

            Group II-A Shortfall Percentage: As to any Distribution Date and any
Class of Group II-A Certificates, the percentage calculated by dividing the
Class A Unpaid Interest Shortfall for such Class by the Aggregate Group II-A
Unpaid Interest Shortfall, in each case determined as of the day preceding the
applicable Distribution Date.

            Holder: See "Certificateholder."

            Independent: When used with respect to any specified Person, such
Person who (i) is in fact independent of the Seller, the Master Servicer and any
Servicer, (ii) does not have any direct financial interest or any material
indirect financial interest in the Seller or the Master Servicer or any Servicer
or in an affiliate of either, and (iii) is not connected with the Seller, the
Master Servicer or any Servicer as an officer, employee, promoter, underwriter,
trustee, partner, director or person performing similar functions.

            Index: As to any Mortgage Loan and Adjustment Date, a rate per annum
that is defined to be the weekly average yield on United States Treasury
Securities adjusted to a constant maturity of one year, as made available by the
Federal Reserve Board, published in Federal Reserve Statistical Release H.15
(519) and most recently available as of the date 45 days before the applicable
Adjustment Date. In the event such Index is no longer available, the applicable
Servicer will select a substitute Index in accordance with the terms of the
related Mortgage Note and in compliance with federal and state law.

            Insurance Policy: Any insurance or performance bond relating to a
Mortgage Loan or the Mortgage Loans, including any hazard insurance, special
hazard insurance, flood insurance, primary mortgage insurance, mortgagor
bankruptcy bond or title insurance.

            Insurance Proceeds: Proceeds paid by any insurer pursuant to any
Insurance Policy covering a Mortgage Loan.

            Insured Expenses: Expenses covered by any Insurance Policy covering
a Mortgage Loan.

            Interest Accrual Amount: As to any Distribution Date and any Class
of Class A Certificates, (i) the product of (a) 1/12th of the Class A
Pass-Through Rate for such Class and (b) the Principal Balance of such Class as
of the Determination Date immediately preceding such Distribution Date minus
(ii) the sum of (A) the Group I-A Interest Percentage or Group II-A Interest
Percentage, as applicable, of such Class of the interest portion of any Realized
Losses allocated to the Group I-A Certificates or to the Group II-A
Certificates, as applicable, on or after the Subordination Depletion Date
pursuant to Section 4.02(c) and (B) the Class A Interest Percentage of such
Class of any Non-Supported Interest Shortfall or Relief Act Shortfall allocated
to the Class A Certificates with respect to such Distribution Date.

            As to any Distribution Date and any Class of Class B Certificates,
an amount equal to (i) the product of 1/12th of the Class B Pass-Through Rate
and the Principal Balance of such Class as of the Determination Date preceding
such Distribution Date minus (ii) the Class B Interest Percentage of such Class
of the sum of any Non-Supported Interest Shortfall and any Relief Act Shortfall
allocated to the Class B Certificates with respect to such Distribution Date.

            Letter of Credit: As defined in the Wells Fargo Bank Servicing
Agreement.

            Liquidated Loan: A Mortgage Loan with respect to which the related
Mortgaged Property has been acquired, liquidated or foreclosed and with respect
to which the applicable Servicer determines that all Liquidation Proceeds which
it expects to recover have been recovered.

            Liquidated Loan Loss: With respect to any Distribution Date, the
aggregate of the amount of losses with respect to each Mortgage Loan which
became a Liquidated Loan during the Applicable Unscheduled Principal Receipt
Period with respect to Full Unscheduled Principal Receipts for such Distribution
Date, equal to the excess of (i) the unpaid principal balance of each such
Liquidated Loan, plus accrued interest thereon in accordance with the
amortization schedule at the time applicable thereto at the applicable Net
Mortgage Interest Rate from the Due Date as to which interest was last paid with
respect thereto through the last day of the month preceding the month in which
such Distribution Date occurs, over (ii) Net Liquidation Proceeds with respect
to such Liquidated Loan.

            Liquidation Expenses: Expenses incurred by a Servicer in connection
with the liquidation of any defaulted Mortgage Loan or property acquired in
respect thereof (including, without limitation, legal fees and expenses,
committee or referee fees, and, if applicable, brokerage commissions and
conveyance taxes), any unreimbursed advances expended by such Servicer pursuant
to its Servicing Agreement or the Master Servicer or Trustee pursuant hereto
respecting the related Mortgage Loan, including any unreimbursed advances for
real property taxes or for property restoration or preservation of the related
Mortgaged Property. Liquidation Expenses shall not include any previously
incurred expenses in respect of an REO Mortgage Loan which have been netted
against related REO Proceeds.

             Liquidation Proceeds: Amounts received by a Servicer (including
Insurance Proceeds) or PMI Advances made by a Servicer in connection with the
liquidation of defaulted Mortgage Loans or property acquired in respect thereof,
whether through foreclosure, sale or otherwise, including payments in connection
with such Mortgage Loans received from the Mortgagor, other than amounts
required to be paid to the Mortgagor pursuant to the terms of the applicable
Mortgage or to be applied otherwise pursuant to law.

             Liquidation Profits: As to any Distribution Date and any Mortgage
Loan that became a Liquidated Loan during the Applicable Unscheduled Principal
Receipt Period with respect to Full Unscheduled Principal Receipts for such
Distribution Date, the excess, if any, of (i) Net Liquidation Proceeds in
respect of such Liquidated Loan over (ii) the unpaid principal balance of such
Liquidated Loan plus accrued interest thereon in accordance with the
amortization schedule at the time applicable thereto at the applicable Net
Mortgage Interest Rate from the Due Date to which interest was last paid with
respect thereto through the last day of the month preceding the month in which
such Distribution Date occurs.

            Loan Group I: The Group I Mortgage Loans.

            Loan Group II: The Group II Mortgage Loans.

            Loan Group: Either of Loan Group I or Loan Group II.

            Loan-to-Value Ratio: The ratio, expressed as a percentage, the
numerator of which is the principal balance of a particular Mortgage Loan at
origination and the denominator of which is the lesser of (x) the appraised
value of the related Mortgaged Property determined in the appraisal used by the
originator at the time of origination of such Mortgage Loan, and (y) if the
Mortgage is originated in connection with a sale of the Mortgaged Property, the
sale price for such Mortgaged Property.

            Lower-Tier Distribution Amount: As defined in Section 4.01(a)(iii).

            Lower-Tier REMIC: One of two separate REMICs comprising the Trust
Estate, the assets of which consist of the Mortgage Loans, such amounts as shall
from time to time be held in the Certificate Account, the insurance policies, if
any, relating to a Mortgage Loan and property which secured a Mortgage Loan and
which has been acquired by foreclosure or deed in lieu of foreclosure.

            Master Servicer: Wells Fargo Bank, or its successor in interest.
Initially, the Master Servicer functions shall be performed by the Corporate
Trust Services division of Wells Fargo Bank.

            Master Servicing Fee: With respect to any Mortgage Loan and any
Distribution Date, the fee payable monthly to the Master Servicer pursuant to
Section 6.05 equal to a fixed percentage (expressed as a per annum rate) of the
unpaid principal balance of such Mortgage Loan.

            Master Servicing Fee Rate: As set forth in Section 11.19.

            Master Servicing Officer: Any officer of the Master Servicer
involved in, or responsible for, the administration and master servicing of the
Mortgage Loans.

            MERS: The Mortgage Electronic Registration Systems, Inc.

            MERS Mortgage Loan: Any MOM Mortgage Loan or any other Mortgage Loan
as to which MERS is (or is intended to be) the mortgagee of record and as to
which a MIN has been assigned.

            Mid-Month Receipt Period: With respect to each Distribution Date,
the one month period beginning on the Determination Date (or, in the case of the
first Distribution Date, from and including the Cut-Off Date) occurring in the
calendar month preceding the month in which such Distribution Date occurs and
ending on the day preceding the Determination Date immediately preceding such
Distribution Date.

            MIN: A MERS Mortgage Identification Number assigned to a Mortgage
Loan registered under MERS.

            MOM: A Mortgage Loan where the related Mortgage names MERS as the
original mortgagee thereof, as to which a MIN has been assigned, and which
Mortgage has not been assigned to any other person.

             Month End Interest: As defined in each Servicing Agreement.

            Monthly Payment: As to any Mortgage Loan (including any REO Mortgage
Loan) and any Due Date, the payment of principal and interest due thereon in
accordance with the amortization schedule at the time applicable thereto (after
adjustment for any Curtailments and Deficient Valuations occurring prior to such
Due Date but before any adjustment to such amortization schedule, other than for
Deficient Valuations, by reason of any bankruptcy or similar proceeding or any
moratorium or similar waiver or grace period).

            Moody's: Moody's Investors Service, Inc. or its successor in
interest.

            Mortgage: The mortgage, deed of trust or other instrument creating a
first lien on Mortgaged Property securing a Mortgage Note together with any
Mortgage Loan Rider, if applicable.

            Mortgage Interest Rate: As to any Mortgage Loan, the per annum rate
at which interest accrues on the unpaid principal balance thereof as set forth
in the related Mortgage Note, which rate is as indicated on the Mortgage Loan
Schedule.

            Mortgage Loan Purchase Agreement: The mortgage loan purchase
agreement dated as of December 17, 2004 between Wells Fargo Bank, as seller, and
the Seller, as purchaser.

            Mortgage Loan Rider: The standard Fannie Mae/Freddie Mac riders to
the Mortgage Note and/or Mortgage riders required when the Mortgaged Property is
a condominium unit or a unit in a planned unit development.

             Mortgage Loan Schedule: The list of the Mortgage Loans transferred
to the Trustee on the Closing Date as part of the Trust Estate and attached
hereto as Exhibit F-1A and Exhibit F-1B, which list may be amended following the
Closing Date upon conveyance of a Substitute Mortgage Loan pursuant to Section
2.02, 2.03 or 2.06 and which list shall set forth at a minimum the following
information as of the close of business on the Cut-Off Date (or, with respect to
Substitute Mortgage Loans, as of the close of business on the day of
substitution) as to each Mortgage Loan:

            (i)    the Mortgage Loan identifying number;

            (ii)   the city, state and zip code of the Mortgaged Property;

            (iii) the type of property;

            (iv)   the Mortgage Interest Rate;

            (v)    the Net Mortgage Interest Rate;

            (vi)   the Monthly Payment;

            (vii) the original number of months to maturity;

            (viii) the scheduled maturity date;

            (ix)   the Cut-Off Date Principal Balance;

            (x)    the Loan-to-Value Ratio at origination;

            (xi)   whether such Mortgage Loan is covered by primary mortgage
                  insurance;

            (xii) the applicable Servicing Fee Rate;

             (xiii) the Master Servicing Fee Rate;

            (xiv) the Index;

            (xv)   the Gross Margin;

            (xvi) the Periodic Cap;

            (xvii) the first Adjustment Date;

            (xviii) the Rate Ceiling; and

            (xix) for each Other Servicer Mortgage Loan, the name of the
                  Servicer with respect thereto.

            Such schedule may consist of multiple reports that collectively set
forth all of the information required.

            Mortgage Loans: Each of the mortgage loans transferred and assigned
to the Trustee on the Closing Date pursuant to Section 2.01(a) and any mortgage
loans substituted therefor pursuant to Section 2.02, 2.03 or 2.06, in each case
as from time to time are included in the Trust Estate as identified in the
Mortgage Loan Schedule.

            Mortgage Note: The note or other evidence of indebtedness evidencing
the indebtedness of a Mortgagor under a Mortgage Loan together with any related
Mortgage Loan Riders, if applicable.

             Mortgaged Property: The property subject to a Mortgage, which may
include Co-op Shares or residential long-term leases.

            Mortgagor: The obligor on a Mortgage Note.

            Net Liquidation Proceeds: As to any defaulted Mortgage Loan,
Liquidation Proceeds net of Liquidation Expenses.

            Net Mortgage Interest Rate: With respect to each Mortgage Loan, a
rate equal to (i) the Mortgage Interest Rate on such Mortgage Loan minus (ii)
the sum of (a) the applicable Servicing Fee Rate, as set forth in Section 11.18
with respect to such Mortgage Loan and (b) the Master Servicing Fee Rate, as set
forth in Section 11.19 with respect to such Mortgage Loan. Any regular monthly
computation of interest at such rate shall be based upon annual interest at such
rate on the applicable amount divided by twelve.

            Net REO Proceeds: As to any REO Mortgage Loan, REO Proceeds net of
any related expenses of the Servicer.

            Net WAC: As to either Loan Group and any Distribution Date, a per
annum rate equal to the weighted average of the Net Mortgage Interest Rates of
the Mortgage Loans in such Loan Group (based on the Scheduled Principal Balances
of the Mortgage Loans in such Loan Group on the first day of the month preceding
the month in which such Distribution Date occurs).

            Non-permitted Foreign Holder:   As defined in Section 5.02(d).

            Nonrecoverable Advance: Any portion of a Periodic Advance previously
made or proposed to be made in respect of a Mortgage Loan which has not been
previously reimbursed to the Servicer, the Master Servicer or the Trustee, as
the case may be, and which the Servicer, the Master Servicer or the Trustee
determines will not, or in the case of a proposed Periodic Advance would not, be
ultimately recoverable from Liquidation Proceeds or other recoveries in respect
of the related Mortgage Loan. The determination by the Servicer, the Master
Servicer or the Trustee (i) that it has made a Nonrecoverable Advance or (ii)
that any proposed Periodic Advance, if made, would constitute a Nonrecoverable
Advance, shall be evidenced by an Officer's Certificate of the Servicer
delivered to the Master Servicer for redelivery to the Trustee or, in the case
of a Master Servicer determination, an Officer's Certificate of the Master
Servicer delivered to the Trustee, in each case detailing the reasons for such
determination.

            Non-Supported Interest Shortfall: With respect to any Distribution
Date, the sum of (i) the excess, if any, of the aggregate Prepayment Interest
Shortfall on the Mortgage Loans over the aggregate Compensating Interest with
respect to such Distribution Date and (ii) Curtailment Interest Shortfalls with
respect to such Distribution Date. With respect to each Distribution Date
occurring on or after the Subordination Depletion Date, the Non-Supported
Interest Shortfall determined pursuant to the preceding sentence will be
increased by the amount of any Subordination Depletion Date Interest Shortfall
for such Distribution Date. Any Non-Supported Interest Shortfall will be
allocated to (a) the Class A Certificates according to the percentage obtained
by dividing the Aggregate Class A Principal Balance by the Aggregate Principal
Balance and (b) the Class B Certificates according to the percentage obtained by
dividing the Class B Principal Balance by the Aggregate Principal Balance.

            Non-U.S. Person: As defined in Section 4.01(g).

            NYCEMA: A New York Consolidation, Extension and Modification
Agreement.

             Officers' Certificate: With respect to any Person, a certificate
signed by the Chairman of the Board, the President or a Vice President, and by
the Treasurer, the Secretary or one of the Assistant Treasurers or Assistant
Secretaries of such Person (or, in the case of a Person which is not a
corporation, signed by the person or persons having like responsibilities), and
delivered to the Trustee.

            Opinion of Counsel: A written opinion of counsel, who may be outside
or salaried counsel for the Seller, a Servicer or the Master Servicer, or any
affiliate of the Seller, a Servicer or the Master Servicer, acceptable to the
Trustee if such opinion is to be delivered to the Trustee; provided, however,
that with respect to REMIC matters, matters relating to the determination of
Eligible Accounts or matters relating to transfers of Certificates, such counsel
shall be Independent.

            Optimal Adjustment Event: With respect to any Class of Class B
Certificates and any Distribution Date, an Optimal Adjustment Event will occur
with respect to such Class if: (i) the Principal Balance of such Class on the
Determination Date succeeding such Distribution Date would have been reduced to
zero (regardless of whether such Principal Balance was reduced to zero as a
result of principal distribution or the allocation of Realized Losses) and (ii)
(a) the Principal Balance of any Class of Class A Certificates would be subject
to further reduction as a result of the third sentence of the definition of
Principal Balance or (b) the Principal Balance of a Class of Class B
Certificates with a lower numerical designation would be reduced with respect to
such Distribution Date as a result of the application of the proviso in the
definition of Class B-1 Principal Balance, Class B-2 Principal Balance, Class
B-3 Principal Balance, Class B-4 Principal Balance, Class B-5 Principal Balance
or Class B-6 Principal Balance.

            Original Aggregate Subordinated Percentage: The Aggregate
Subordinated Percentage as of the Cut-Off Date, as set forth in Section 11.06.

            Original Group I-A Percentage: The Group I-A Percentage as of the
Cut-Off Date, as set forth in Section 11.03(a).

            Original Group II-A Percentage: The Group II-A Percentage as of the
Cut-Off Date, as set forth in Section 11.03(b).

            Original Class B Principal Balance: The sum of the Original Class
B-1 Principal Balance, Original Class B-2 Principal Balance, Original Class B-3
Principal Balance, Original Class B-4 Principal Balance, Original Class B-5
Principal Balance and Original Class B-6 Principal Balance, as set forth in
Section 11.08.

            Original Class B-1 Fractional Interest: As to the first Distribution
Date, the percentage obtained by dividing the sum of the Original Class B-2
Principal Balance, the Original Class B-3 Principal Balance, the Original Class
B-4 Principal Balance, the Original Class B-5 Principal Balance and the Original
Class B-6 Principal Balance by the Cut-Off Date Aggregate Principal Balance. The
Original Class B-1 Fractional Interest is specified in Section 11.09.

            Original Class B-2 Fractional Interest: As to the first Distribution
Date, the percentage obtained by dividing the sum of the Original Class B-3
Principal Balance, the Original Class B-4 Principal Balance, the Original Class
B-5 Principal Balance and the Original Class B-6 Principal Balance by the
Cut-Off Date Aggregate Principal Balance. The Original Class B-2 Fractional
Interest is specified in Section 11.10.

            Original Class B-3 Fractional Interest: As to the first Distribution
Date, the percentage obtained by dividing the sum of the Original Class B-4
Principal Balance, the Original Class B-5 Principal Balance and the Original
Class B-6 Principal Balance by the Cut-Off Date Aggregate Principal Balance. The
Original Class B-3 Fractional Interest is specified in Section 11.11.

            Original Class B-4 Fractional Interest: As to the first Distribution
Date, the percentage obtained by dividing the sum of the Original Class B-5
Principal Balance and the Original Class B-6 Principal Balance by the Cut-Off
Date Aggregate Principal Balance. The Original Class B-4 Fractional Interest is
specified in Section 11.12.

            Original Class B-5 Fractional Interest: As to the first Distribution
Date, the percentage obtained by dividing the Original Class B-6 Principal
Balance by the Cut-Off Date Aggregate Principal Balance. The Original Class B-5
Fractional Interest is specified in Section 11.13.

            Original Class B-1 Principal Balance: The Class B-1 Principal
Balance as of the Cut-Off Date, as set forth in Section 11.08.

            Original Class B-2 Principal Balance: The Class B-2 Principal
Balance as of the Cut-Off Date, as set forth in Section 11.08.

             Original Class B-3 Principal Balance: The Class B-3 Principal
Balance as of the Cut-Off Date, as set forth in Section 11.08.

            Original Class B-4 Principal Balance: The Class B-4 Principal
Balance as of the Cut-Off Date, as set forth in Section 11.08.

            Original Class B-5 Principal Balance: The Class B-5 Principal
Balance as of the Cut-Off Date, as set forth in Section 11.08.

            Original Class B-6 Principal Balance: The Class B-6 Principal
Balance as of the Cut-Off Date, as set forth in Section 11.08.

            Original Principal Balance: Any of the Original Principal Balances
of the Classes of Class A Certificates as set forth in Section 11.04; the
Original Class B-1 Principal Balance, Original Class B-2 Principal Balance,
Original Class B-3 Principal Balance, Original Class B-4 Principal Balance,
Original Class B-5 Principal Balance or Original Class B-6 Principal Balance as
set forth in Section 11.08.

            Original Subordinated Principal Amount: The Class B Principal
Balance as of the Cut-Off Date.

            Other Servicer: Any of the Servicers other than Wells Fargo Bank.

            Other Servicer Mortgage Loan: Any of the Mortgage Loans, if any,
identified in Exhibit F-2 hereto, as such Exhibit may be amended from time to
time in connection with a substitution pursuant to Section 2.02 or 2.06, which
Mortgage Loan is serviced under an Other Servicing Agreement.

            Other Servicing Agreements: The Servicing Agreements other than the
Wells Fargo Bank Servicing Agreement.

            Outstanding Mortgage Loan: As to any Due Date, a Mortgage Loan
(including an REO Mortgage Loan) which was not the subject of a Full Unscheduled
Principal Receipt prior to such Due Date and which was not repurchased by the
Seller prior to such Due Date pursuant to Section 2.02 or 2.03.

            Owner Mortgage Loan File: A file maintained by the Custodian for
each Mortgage Loan that contains the documents specified in Section 2.01(a) and
any additional documents required to be added to the Owner Mortgage Loan File
pursuant to this Agreement.

            Partial Liquidation Proceeds: Liquidation Proceeds received by a
Servicer prior to the Unscheduled Principal Receipt Period in which the related
Mortgage Loan became a Liquidated Loan.

            Partial Unscheduled Principal Receipt: An Unscheduled Principal
Receipt which is not a Full Unscheduled Principal Receipt.

            Paying Agent: The Person authorized on behalf of the Trustee to make
distributions to Certificateholders with respect to the Certificates and to
forward to Certificateholders the periodic and annual statements required by
Section 4.04. The Paying Agent may be the Trustee. The initial Paying Agent is
appointed in Section 4.03(b).

             Payment Account: The account maintained pursuant to Section 4.03(a).

            Percentage Interest: With respect to a Class A Certificate of a
Class, the undivided percentage interest obtained by dividing the original
principal balance of such Certificate by the Original Principal Balance of such
Class of Class A Certificates. With respect to a Class B Certificate of a Class,
the undivided percentage interest obtained by dividing the original principal
balance of such Certificate by the Original Principal Balance of such Class of
Class B Certificates.

            Periodic Advance: The aggregate of the advances required to be made
by a Servicer on any Distribution Date pursuant to its Servicing Agreement or by
the Master Servicer or the Trustee hereunder, the amount of any such advances
being equal to the total of all Monthly Payments (adjusted, in each case (i) in
respect of interest, to the applicable Mortgage Interest Rate less the Servicing
Fee in the case of Periodic Advances made by a Servicer and to the applicable
Net Mortgage Interest Rate in the case of Periodic Advances made by the Master
Servicer or Trustee and (ii) by the amount of any related Debt Service
Reductions or reductions in the amount of interest collectable from the
Mortgagor pursuant to the Servicemembers Civil Relief Act, as it may be amended
from time to time, or similar legislation or regulations then in effect) on the
Mortgage Loans, that (x) were delinquent as of the close of business on the
related Determination Date, (y) were not the subject of a previous Periodic
Advance by such Servicer or of a Periodic Advance by the Master Servicer or the
Trustee, as the case may be and (z) have not been determined by the Master
Servicer, such Servicer or Trustee to be Nonrecoverable Advances.

            Periodic Cap: For each Mortgage Loan, the applicable limit on
adjustment of the Mortgage Interest Rate for each Adjustment Date specified in
the applicable Mortgage Note and designated as such in the Mortgage Loan
Schedule.

            Person: Any individual, corporation, partnership, joint venture,
association, joint-stock company, trust, unincorporated organization or
government or any agency or political subdivision thereof.

            Plan: As defined in Section 5.02(c).

             Pledge Holder: As defined in the Wells Fargo Bank Servicing
Agreement.

            Pledged Asset Mortgage Loans: The Mortgage Loans listed on Exhibit Q
for which Letters of Credit have been issued.

            PMI Advance: As defined in the related Servicing Agreement, if
applicable.

            Pool Balance: Either of the Group I Pool Balance or Group II Pool
Balance.

            Pool Scheduled Principal Balance: The sum of the Group I Pool
Balance and Group II Pool Balance.

            Prepayment In Full: With respect to any Mortgage Loan, a Mortgagor
payment consisting of a Principal Prepayment in the amount of the outstanding
principal balance of such loan and resulting in the full satisfaction of such
obligation.

            Prepayment Interest Shortfall: On any Distribution Date, the amount
of interest, if any, that would have accrued on any Mortgage Loan which was the
subject of a Prepayment in Full at the Net Mortgage Interest Rate for such
Mortgage Loan from the date of its Prepayment in Full (but in the case of a
Prepayment in Full where the Applicable Unscheduled Principal Receipt Period is
the Mid-Month Receipt Period, only if the date of the Prepayment in Full is on
or after the Determination Date in the month prior to the month of such
Distribution Date and prior to the first day of the month of such Distribution
Date) through the last day of the month prior to the month of such Distribution
Date.

            Principal Adjustment: In the event that the Class B-1 Optimal
Principal Amount, Class B-2 Optimal Principal Amount, Class B-3 Optimal
Principal Amount, Class B-4 Optimal Principal Amount, Class B-5 Optimal
Principal Amount or Class B-6 Optimal Principal Amount is calculated in
accordance with the proviso in such definition with respect to any Distribution
Date, the Principal Adjustment for such Class of Class B Certificates shall
equal the difference between (i) the amount that would have been distributed to
such Class as principal in accordance with Section 4.01(a)(ii) for such
Distribution Date, calculated without regard to such proviso and assuming there
are no Principal Adjustments for such Distribution Date and (ii) the Adjusted
Principal Balance for such Class.

            Principal Balance: As of the first Determination Date and as to any
Class of Class A Certificates, the Original Principal Balance of such Class. As
of any subsequent Determination Date prior to the Subordination Depletion Date
and as to any Class of Class A Certificates, the Original Principal Balance of
such Class less the sum of all amounts previously distributed in respect of such
Class on prior Distribution Dates (i) pursuant to Paragraph third of Section
4.01(a)(i) and (ii) as a result of a Principal Adjustment. After the
Subordination Depletion Date, each such Principal Balance of a Class of Class A
Certificates will also be reduced (if clause (i) is greater than clause (ii)) or
increased (if clause (i) is less than clause (ii)) on each Determination Date by
an amount equal to the product of the Group I-A Loss Percentage or Group II-A
Loss Percentage, as applicable, of such Class and the difference, if any,
between (i) the Group I-A Principal Balance or Group II-A Principal Balance, as
applicable, as of such Determination Date without regard to this sentence and
(ii) Group I Adjusted Pool Amount or Group II Adjusted Pool Amount, as
applicable, for the preceding Distribution Date; provided, however, that the
amount of any such reduction for the Class II-A-7 Certificates will be decreased
by the Class II-A-8 Loss Allocation Amount. In addition, any increase allocated
to the Class II-A-7 Certificates pursuant to the third sentence above will
instead increase the Principal Balance of the Class II-A-8 Certificates.
Notwithstanding the foregoing, on any Distribution Date in which the Class
II-A-7 Loss Amount exceeds the Principal Balance of the Class II-A-8
Certificates prior to any reduction for the Class II-A-8 Loss Allocation Amount,
such excess will be allocated in reduction of the Principal Balance of the Class
II-A-7 Certificates.

            As to the Class B Certificates, the Class B-1 Principal Balance,
Class B-2 Principal Balance, Class B-3 Principal Balance, Class B-4 Principal
Balance, Class B-5 Principal Balance and Class B-6 Principal Balance,
respectively.

            Notwithstanding the foregoing, no Principal Balance of a Class will
be increased on any Determination Date such that the Principal Balance of such
Class exceeds its Original Principal Balance less all amounts previously
distributed in respect of such Class on prior Distribution Dates pursuant to
Paragraph third clauses (A) or (B) of Section 4.01(a)(i) or Paragraphs third,
sixth, ninth, twelfth, fifteenth or eighteenth of Section 4.01(a)(ii).

            Principal Prepayment: Any Mortgagor payment on a Mortgage Loan which
is received in advance of its Due Date and is not accompanied by an amount
representing scheduled interest for any period subsequent to the date of
prepayment.

            Prior Month Receipt Period: With respect to each Distribution Date,
the calendar month preceding the month in which such Distribution Date occurs.

            Prohibited Transaction Tax: Any tax imposed under Section 860F of
the Code.

            Prospectus: The prospectus dated November 16, 2004 as supplemented
by the prospectus supplement dated December 15, 2004, relating to the Class A,
Class B-1, Class B-2 and Class B-3 Certificates.

            Prudent Servicing Practices: The standard of care set forth in each
Servicing Agreement.

            Rate Ceiling: The maximum per annum Mortgage Interest Rate permitted
under the related Mortgage Note.

            Rating Agency: Any nationally recognized statistical credit rating
agency, or its successor, that rated one or more Classes of the Certificates at
the request of the Seller at the time of the initial issuance of the
Certificates. The Rating Agencies for the Class A, Class B-1, Class B-2, and
Class B-3 Certificates are Fitch and Moody's. The Rating Agency for the Class
B-4 and Class B-5 Certificates is Fitch. If any such agency or a successor is no
longer in existence, "Rating Agency" shall be such statistical credit rating
agency, or other comparable Person, designated by the Seller, notice of which
designation shall be given to the Trustee and the Master Servicer. References
herein to the highest short-term rating category of a Rating Agency shall mean
F-1 in the case of Fitch, P-1 in the case of Moody's and in the case of any
other Rating Agency shall mean its equivalent of such ratings. References herein
to the highest long-term rating categories of a Rating Agency shall mean AAA in
the case of Fitch and Aaa in the case of Moody's, and in the case of any other
Rating Agency shall mean its equivalent of such ratings without any plus or
minus.

             Realized Losses: With respect to any Distribution Date, (i)
Liquidated Loan Losses incurred on Liquidated Loans for which the Liquidation
Proceeds were received during the Applicable Unscheduled Principal Receipt
Period with respect to Full Unscheduled Principal Receipts with respect to such
Distribution Date and (ii) Bankruptcy Losses incurred during the period
corresponding to the Applicable Unscheduled Principal Receipt Period with
respect to Full Unscheduled Principal Receipts for such Distribution Date.

            Record Date: The last Business Day of the month preceding the month
of the related Distribution Date.

            Recovery: As to any Distribution Date and each Loan Group, the sum
of all amounts received (net of any reimbursable expenses) for Group I Mortgage
Loans or Group II Mortgage Loans, as applicable, subsequent to any such Mortgage
Loan being determined to be a Liquidated Loan.

            Reimbursement Amount: As defined in Section 2.03(c).

            Relief Act Shortfall: Any interest shortfalls arising as a result of
the reduction in the amount of monthly interest payments on any Mortgage Loans
as a result of the application of the Servicemembers Civil Relief Act, as it may
be amended from time to time, or comparable state legislation. Any Relief Act
Shortfall will be allocated to (a) the Class A Certificates according to the
percentage obtained by dividing the Class A Principal Balance by the sum of the
Class A Principal Balance and the Class B Principal Balance and (b) the Class B
Certificates according to the percentage obtained by dividing the Class B
Principal Balance by the sum of the Class A Principal Balance and the Class B
Principal Balance.

            REMIC: A "real estate mortgage investment conduit" as defined in
Code Section 860D.

            REMIC Provisions: Provisions of the federal income tax law relating
to REMICs, which appear at Sections 860A through 860G of Part IV of Subchapter M
of Chapter 1 of Subtitle A of the Code, and related provisions, and U.S.
Department of the Treasury temporary, proposed or final regulations promulgated
thereunder, as the foregoing are in effect (or with respect to proposed
regulations, are proposed to be in effect) from time to time.

            Remittance Date: As defined in each of the Servicing Agreements.

            REO Mortgage Loan: Any Mortgage Loan which is not a Liquidated Loan
and as to which the indebtedness evidenced by the related Mortgage Note is
discharged and the related Mortgaged Property is held as part of the Trust
Estate.

            REO Proceeds: Proceeds received in respect of any REO Mortgage Loan
(including, without limitation, proceeds from the rental of the related
Mortgaged Property).

            Request for Release: A request for release (which may be in
electronic form) in substantially the form attached as Exhibit G hereto.

            Responsible Officer: When used with respect to the Trustee, the
Chairman or Vice-Chairman of the Board of Directors or Trustees, the Chairman or
Vice-Chairman of the Executive or Standing Committee of the Board of Directors
or Trustees, the President, the Chairman of the Committee on Trust Matters, any
Vice President, the Secretary, any Assistant Secretary, the Treasurer, any
Assistant Treasurer, the Cashier, any Assistant Cashier, any Trust Officer or
Assistant Trust Officer, the Controller and any Assistant Controller or any
other officer of the Trustee customarily performing functions similar to those
performed by any of the above-designated officers and also, with respect to a
particular matter, any other officer to whom such matter is referred because of
such officer's knowledge of and familiarity with the particular subject.

            Retained Mortgage Loan File: A file maintained by Wells Fargo Bank
prior to any Document Transfer Event for each Mortgage Loan that contains the
documents specified in Section 2.01(b) and any additional documents required to
be added to the Retained Mortgage Loan File pursuant to this Agreement.

            Rule 144A: Rule 144A promulgated under the Securities Act of 1933,
as amended.

            Scheduled Principal Balance: As to any Mortgage Loan and
Distribution Date, the principal balance of such Mortgage Loan as of the Due
Date in the month preceding the month of such Distribution Date as specified in
the amortization schedule at the time relating thereto (before any adjustment to
such amortization schedule by reason of any bankruptcy (other than Deficient
Valuations) or similar proceeding or any moratorium or similar waiver or grace
period) after giving effect to (A) Unscheduled Principal Receipts received or
applied by the applicable Servicer during the related Unscheduled Principal
Receipt Period for each applicable type of Unscheduled Principal Receipt related
to the Distribution Date occurring in the month preceding such Distribution
Date, (B) Deficient Valuations incurred prior to such Due Date and (C) the
payment of principal due on such Due Date and irrespective of any delinquency in
payment by the related Mortgagor. Accordingly, the Scheduled Principal Balance
of a Mortgage Loan which becomes a Liquidated Loan at any time through the last
day of such related Unscheduled Principal Receipt Period shall be zero.

            Seller: Wells Fargo Asset Securities Corporation, or its successor
in interest.

            Servicer Mortgage Loan File: As defined in each of the Servicing
Agreements.

            Servicers: Wells Fargo Bank, as a Servicer under the related
Servicing Agreement. Initially the servicing functions performed by Wells Fargo
Bank shall be performed by the Wells Fargo Home Mortgage division of Wells Fargo
Bank.

            Servicing Agreements: Each of the Servicing Agreements executed with
respect to a portion of the Mortgage Loans by one of the Servicers, which
agreements are attached hereto, collectively, as Exhibit L.

            Servicing Fee: With respect to any Servicer, as defined in its
Servicing Agreement.

            Servicing Fee Rate: With respect to a Mortgage Loan, as set forth in
Section 11.18.

            Servicing Officer: Any officer of a Servicer involved in, or
responsible for, the administration and servicing of the Mortgage Loans.

            Similar Law: As defined in Section 5.02(c).

            Single Certificate: A Certificate of any Class that evidences the
smallest permissible Denomination for such Class, as set forth in Section 11.17.

            Startup Day: As defined in Section 2.05.

            Subordinate Balance Ratio: The ratio between the Group I Subordinate
Amount and the Group II Subordinate Amount.

            Subordination Depletion Date: The Distribution Date preceding the
first Distribution Date on which each of the Group I-A Percentage and Group II-A
Percentage (in each case, determined pursuant to clause (ii) of the definition
thereof) equals or exceeds 100%.

            Subordination Depletion Date Interest Shortfall: With respect to any
Distribution Date that occurs on or after the Subordination Depletion Date with
respect to any Unscheduled Principal Receipt (other than a Prepayment in Full or
Curtailment):

            (A)    in the case where the Applicable Unscheduled Principal Receipt
                  Period is the Mid-Month Receipt Period and such Unscheduled
                  Principal Receipt is received by the Servicer on or after the
                  Determination Date in the month preceding the month of such
                  Distribution Date but prior to the first day of the month of
                  such Distribution Date, the amount of interest that would have
                  accrued at the Net Mortgage Interest Rate on the amount of
                  such Unscheduled Principal Receipt from the day of its receipt
                  or, if earlier, its application by the Servicer through the
                  last day of the month preceding the month of such Distribution
                  Date; and

            (B)    in the case where the Applicable Unscheduled Principal Receipt
                  Period is the Prior Month Receipt Period and such Unscheduled
                  Principal Receipt is received by the Servicer during the month
                  preceding the month of such Distribution Date, the amount of
                  interest that would have accrued at the Net Mortgage Interest
                  Rate on the amount of such Unscheduled Principal Receipt from
                  the day of its receipt or, if earlier, its application by the
                  Servicer through the last day of the month in which such
                   Unscheduled Principal Receipt is received.

            Subsidy Account: If the Trust Estate contains any Subsidy Loans, the
deposit account or accounts created and maintained by the Servicer for deposit
of Subsidy Funds and amounts payable under interest subsidy agreements relating
to mortgage loans other than the Mortgage Loans.

            Subsidy Funds: If the Trust Estate contains any Subsidy Loans, funds
contributed by the employer of a Mortgagor in order to reduce the payments
required from the Mortgagor for a specified period in specified amounts.

            Subsidy Loan: Any Mortgage Loan subject to a temporary interest
subsidy agreement pursuant to which the monthly interest payments made by the
related Mortgagor will be less than the scheduled monthly interest payments on
such Mortgage Loan, with the resulting difference in interest payments being
provided by the employer of the Mortgagor.

            Substitute Mortgage Loan:   As defined in Section 2.02.

            Substitution Principal Amount: With respect to any Mortgage Loan
substituted in accordance with Section 2.02 or pursuant to Section 2.03 or 2.06,
the excess of (x) the unpaid principal balance of the Mortgage Loan which is
substituted for over (y) the unpaid principal balance of the Substitute Mortgage
Loan, each balance being determined as of the date of substitution.

            Trust: The trust created by this Agreement.

            Trust Estate: The corpus of the Trust, consisting of the Mortgage
Loans, such amounts as may be held from time to time in the Certificate Account,
the rights of the Trustee to receive the proceeds of all insurance policies and
performance bonds, if any, required to be maintained hereunder or under the
related Servicing Agreement, property which secured a Mortgage Loan and which
has been acquired by foreclosure or deed in lieu of foreclosure and all other
property and rights described in the first paragraph of Section 2.01(a).

            Trustee: Wachovia Bank, National Association, a national banking
association with its principal office located in Charlotte, North Carolina, or
any successor trustee appointed as herein provided.

            Type 1 Mortgage Loan: Any of the Mortgage Loans identified in
Exhibit F-1A and Exhibit F-1B hereto, as such Exhibit may be amended from time
to time in connection with a substitution pursuant to Section 2.02 or 2.06,
serviced under the Wells Fargo Bank Servicing Agreement and having a Mid-Month
Receipt Period with respect to all types of Unscheduled Principal Receipts.

            Uncertificated Lower-Tier Interest: Any of the Class I-L Interest,
the Class I-LS Interest, the Class II-L Interest and the Class II-LS Interest.

            Undercollateralized Group: As defined in Section 4.01(b)(iii).

             Undercollateralized Amount: As defined in Section 4.01(b)(iii).

            Unpaid Interest Shortfalls: Each of the Class A Unpaid Interest
Shortfalls, the Class B-1 Unpaid Interest Shortfall, the Class B-2 Unpaid
Interest Shortfall, the Class B-3 Unpaid Interest Shortfall, the Class B-4
Unpaid Interest Shortfall, the Class B-5 Unpaid Interest Shortfall and the Class
B-6 Unpaid Interest Shortfall.

            Unscheduled Principal Receipt: Any Principal Prepayment or other
recovery of principal on a Mortgage Loan, including, without limitation,
Liquidation Proceeds, Net REO Proceeds, Recoveries and proceeds received from
any condemnation award or proceeds in lieu of condemnation other than that
portion of such proceeds released to the Mortgagor in accordance with the terms
of the Mortgage or Prudent Servicing Practices, but excluding any Liquidation
Profits and proceeds of a repurchase of a Mortgage Loan by the Seller and any
Substitution Principal Amounts.

            Unscheduled Principal Receipt Period: Either a Mid-Month Receipt
Period or a Prior Month Receipt Period.

            Upper-Tier Certificate: Any one of the Class A Certificates (other
than the Class II-A-LR Certificate) and the Class B Certificates.

            Upper-Tier Certificate Account: The trust account established and
maintained pursuant to Section 4.01(e).

            Upper-Tier REMIC: One of the two separate REMICs comprising the
Trust Estate, the assets of which consist of the Uncertificated Lower-Tier
Interests and such amounts as shall from time to time be held in the Upper-Tier
Certificate Account.

            U.S. Person: As defined in Section 4.01(g).

            Voting Interest: With respect to any provisions hereof providing for
the action, consent or approval of the Holders of all Certificates evidencing
specified Voting Interests in the Trust Estate, the Holders of each Class of
Certificates will collectively be entitled to the then applicable percentage of
the aggregate Voting Interest represented by all Certificates equal to the ratio
obtained by dividing the Principal Balance of such Class by the sum of the Group
I-A Principal Balance, Group II-A Principal Balance and the Class B Principal
Balance. Each Certificateholder of a Class will have a Voting Interest equal to
the product of the Voting Interest to which such Class is collectively entitled
and the Percentage Interest in such Class represented by such Holder's
Certificates. With respect to any provisions hereof providing for action,
consent or approval of each Class of Certificates or specified Classes of
Certificates, each Certificateholder of a Class will have a Voting Interest in
such Class equal to such Holder's Percentage Interest in such Class.

            Wells Fargo Bank: Wells Fargo Bank, N.A., or its successor in
interest.

            Wells Fargo Bank Correspondents: The entities identified on a list
provided by Wells Fargo Bank to the Master Servicer, from which Wells Fargo Bank
purchased the Mortgage Loans.

            Wells Fargo Bank Servicing Agreement: The Servicing Agreement
providing for the servicing of the Type 1 Mortgage Loans initially by Wells
Fargo Bank.

            Section 1.02 Acts of Holders.

            (a) Any request, demand, authorization, direction, notice, consent,
waiver or other action provided by this Agreement to be given or taken by
Holders may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed by such Holders in person or by an agent duly
appointed in writing. Except as herein otherwise expressly provided, such action
shall become effective when such instrument or instruments are delivered to the
Trustee. Proof of execution of any such instrument or of a writing appointing
any such agent shall be sufficient for any purpose of this Agreement and
conclusive in favor of the Trustee, if made in the manner provided in this
Section 1.02. The Trustee shall promptly notify the Master Servicer in writing
of the receipt of any such instrument or writing.

            (b) The fact and date of the execution by any Person of any such
instrument or writing may be proved by the affidavit of a witness of such
execution or by a certificate of a notary public or other officer authorized by
law to take acknowledgments of deeds, certifying that the individual signing
such instrument or writing acknowledged to him the execution thereof. When such
execution is by a signer acting in a capacity other than his or her individual
capacity, such certificate or affidavit shall also constitute sufficient proof
of his or her authority. The fact and date of the execution of any such
instrument or writing, or the authority of the individual executing the same,
may also be proved in any other manner which the Trustee deems sufficient.

            (c) The ownership of Certificates (whether or not such Certificates
shall be overdue and notwithstanding any notation of ownership or other writing
thereon made by anyone other than the Trustee and the Authenticating Agent)
shall be proved by the Certificate Register, and neither the Trustee, the Seller
nor the Master Servicer shall be affected by any notice to the contrary.

            (d) Any request, demand, authorization, direction, notice, consent,
waiver or other action of the Holder of any Certificate shall bind every future
Holder of the same Certificate and the Holder of every Certificate issued upon
the registration of transfer thereof or in exchange therefor or in lieu thereof
in respect of anything done, omitted or suffered to be done by the Trustee, the
Seller or the Master Servicer in reliance thereon, whether or not notation of
such action is made upon such Certificate.

            Section 1.03 Effect of Headings and Table of Contents.

            The Article and Section headings in this Agreement and the Table of
Contents are for convenience of reference only and shall not affect the
interpretation or construction of this Agreement.

            Section 1.04 Benefits of Agreement.

            Nothing in this Agreement or in the Certificates, express or
implied, shall give to any Person, other than the parties to this Agreement and
their successors hereunder and the Holders of the Certificates any benefit or
any legal or equitable right, power, remedy or claim under this Agreement.

                                    ARTICLE II

                          CONVEYANCE OF MORTGAGE LOANS;
                      ORIGINAL ISSUANCE OF THE CERTIFICATES

            Section 2.01 Conveyance of Mortgage Loans.

            (a) The Seller, concurrently with the execution and delivery hereof,
does hereby assign to the Trustee, without recourse all the right, title and
interest of the Seller in and to (a) the Trust Estate, including all interest
and principal received by the Seller on or with respect to the Mortgage Loans
after the Cut-Off Date (and including scheduled payments of principal and
interest due after the Cut-Off Date but received by the Seller on or before the
Cut-Off Date and Unscheduled Principal Receipts received or applied on the
Cut-Off Date, but not including payments of principal and interest due on the
Mortgage Loans on or before the Cut-Off Date), (b) the Insurance Policies, (c)
the obligations of the Servicers under the Servicing Agreements with respect to
the Mortgage Loans, (d) the right to receive amounts, if any, payable on behalf
of any Mortgagor from the Subsidy Account relating to any Subsidy Loan, (e) all
of the Seller's right, title and interest in and to the proceeds of the Letters
of Credit and (f) proceeds of all the foregoing. It is agreed and understood by
the Seller and the Trustee that it is not intended that any mortgage loan be
included in the Trust Estate that is a "High-Cost Home Loan" as defined in any
of (i) the New Jersey Home Ownership Act effective November 27, 2003, (ii) the
New Mexico Home Loan Protection Act effective January 1, 2004 or (iii) the
Massachusetts Predatory Home Loan Practices Act effective November 7, 2004.

            In connection with such assignment, the Seller shall, with respect
to each Mortgage Loan, deliver, or cause to be delivered, to the Custodian, on
or before the Closing Date the following documents or instruments with respect
to each Mortgage Loan:

            (i) The original Mortgage Note either (A) endorsed in blank or (B)
      endorsed as provided in Section 2.01(d), with all prior and intervening
      endorsements as may be necessary to show a complete chain of endorsements
      or with respect to any Mortgage Loan as to which the original Mortgage
      Note has been permanently lost or destroyed and has not been replaced, a
      lost note affidavit with a copy of the Mortgage Note and, in the case of
      any Mortgage Loan originated in the State of New York documented by a
      NYCEMA, the NYCEMA, the new Mortgage Note, if applicable, the consolidated
      Mortgage Note and the consolidated Mortgage;

            (ii) A recorded original assignment of the related Mortgage from
      Wells Fargo Bank assigning the related Mortgage to the Trustee (which may
      be assigned in blank), certified by the recording office, or, if such
      assignment is in the process of being recorded, a copy of the related
      Mortgage transmitted for recordation certified by an officer of Wells
      Fargo Bank or applicable Wells Fargo Bank Correspondent to be a true and
      correct copy of such assignment submitted for recordation; provided,
      however, if recordation is not required as described below, an assignment
      in recordable form (which may be assigned in blank) with respect to the
      related Mortgage;

            (iii) The original of each assumption agreement, modification,
      written assurance or substitution agreement pertaining to such Mortgage
      Note, if any;

            (iv) For each Mortgage Loan secured by Co-op Shares, the originals
      of the following documents or instruments:

                  (a)    The loan security agreement;

                  (b)    The stock certificate;

                  (c)    The stock power, executed in blank;

                  (d)    The executed proprietary lease;

                  (e)    The executed recognition agreement;

                  (f)    The executed UCC-1 financing statement with evidence of
                        recording thereon; and

                  (g)    The executed UCC-3 financing statements or other
                        appropriate UCC financing statements required by state
                        law, evidencing a complete and unbroken chain from the
                        mortgagee to the Trustee with evidence of recording
                        thereon (or in a form suitable for recordation); and

            (v) For each Letter of Credit, the original advice of such Letter of
      Credit endorsed by the Pledge Holder and Wells Fargo Bank's notice of
      transfer (Exhibit A to the Letter of Credit) of beneficiary of such Letter
      of Credit to the Trustee.

            (b) Following a Document Transfer Event, the Seller shall, with
respect to each Mortgage Loan, deliver, or cause to be delivered, to the
Custodian, within 60 days copies (which may be in electronic form mutually
agreed upon by the Seller and the Custodian) of the following additional
documents or instruments with respect to each Mortgage Loan; provided, however,
that originals of such documents or instruments shall be delivered to the
Custodian if originals are required under the law in which the related Mortgaged
Property is located in order to exercise all remedies available to the Trust
under applicable law following default by the related Mortgagor:

            (i) The original recorded Mortgage with evidence of recordation
      noted thereon or attached thereto, together with any addenda or riders
      thereto, or a copy of such recorded Mortgage with such evidence of
      recordation certified to be true and correct by the appropriate
      governmental recording office; or a copy of such recorded Mortgage with
      such evidence of recordation, or if the original Mortgage has been
      submitted for recordation but has not been returned from the applicable
      public recording office, a copy of the Mortgage certified by an officer of
      Wells Fargo Bank or the applicable Wells Fargo Bank Correspondent to be a
      true and correct copy of the original Mortgage submitted for recordation;

            (ii) The original of each assumption agreement, modification,
      written assurance or substitution agreement pertaining to such Mortgage,
      if any, or, if such document is in the process of being recorded, a copy
      of such document, certified by an officer of Wells Fargo Bank or the
      applicable Wells Fargo Bank Correspondent of such Mortgage Loan or by the
      applicable title insurance company, closing agent, settlement agent,
      escrow agent or closing attorney to be a true and correct copy of such
      document transmitted for recordation, if any;

            (iii) For each MERS Mortgage Loan that is not a MOM Mortgage Loan,
      the original assignment showing MERS as the assignee of the Mortgage, with
      evidence of recording thereon or copies thereof certified by an officer of
      Wells Fargo Bank or the applicable Wells Fargo Bank Correspondent to have
      been submitted for recordation;

            (iv) Each original recorded intervening assignment of the Mortgage
      as may be necessary to show a complete chain of title from the Mortgage
      Loan originator to Wells Fargo Bank or Wells Fargo Home Mortgage, Inc.,
      with evidence of recordation noted thereon or attached thereto, or a copy
      of such assignment with such evidence of recordation to be true and
      correct by the appropriate governmental recording office, or, if any such
      assignment has been submitted for recordation but has not been returned
      from the applicable public recording office or is not otherwise available,
      a copy of such assignment certified by an officer of Wells Fargo Bank or
      the applicable Wells Fargo Bank Correspondent to be a true and correct
      copy of the recorded assignment submitted for recordation; and

            (v) The original policy of the title insurance or certificate of
      title insurance or a written commitment to issue such a title insurance
      policy or certificate of title insurance, or a copy of such title
      insurance certified as true and correct by the applicable insurer or any
      attorney's certificate of title with an Officer's Certificate of Wells
      Fargo Bank or the applicable Wells Fargo Bank Correspondent that such
      attorney's certificate of title is customarily used in lieu of a title
      insurance policy in the jurisdiction in which the related mortgage
      property is located.

            (c) If any assignment of a Mortgage to the Trustee is in the process
of being recorded on the Closing Date, the Seller shall use its best efforts to
cause each such original recorded document or certified copy thereof to be
delivered to the Custodian promptly following its recordation, but in no event
later than one (1) year following the Closing Date. If any Mortgage has been
recorded in the name of MERS or its designee, no assignment of Mortgage in favor
of the Trustee will be required to be prepared or delivered and instead, the
Master Servicer shall take all actions as are necessary to cause the Trust
Estate to be shown as the owner of the related Mortgage Loan on the records of
MERS for the purpose of the system of recording transfers of beneficial
ownership of mortgages maintained by MERS. The Seller shall also cause to be
delivered to the Custodian any other original mortgage loan document included in
the Owner Mortgage Loan File if a copy thereof has been delivered. The Seller
shall pay from its own funds, without any right of reimbursement therefor, the
amount of any costs, liabilities and expenses incurred by the Trust Estate by
reason of the failure of the Seller to cause to be delivered to the Custodian
within one (1) year following the Closing Date any assignment of a Mortgage
(except with respect to any Mortgage recorded in the name of MERS) not delivered
to the Custodian on the Closing Date.

            In lieu of recording an assignment of any Mortgage the Seller may,
deliver or cause to be delivered to the Custodian the assignment of the Mortgage
Loan to the Trustee in a form suitable for recordation, if (i) with respect to a
particular state the Trustee has received an Opinion of Counsel acceptable to it
that such recording is not required to make the assignment effective against the
parties to the Mortgage or subsequent purchasers or encumbrances of the
Mortgaged Property or (ii) the Seller has been advised by each Rating Agency
that non-recordation in a state will not result in a reduction of the rating
assigned by that Rating Agency at the time of initial issuance of the
Certificates. Set forth on Exhibit K attached hereto is a list of all states
where recordation is required by either Rating Agency to obtain the initial
ratings of the Certificates. The Custodian may rely and shall be protected in
relying upon the information contained in such Exhibit K. In the event that the
Custodian receives notice that recording is required to protect the right, title
and interest of the Trustee in and to any such Mortgage Loan for which
recordation of an assignment has not previously been required, the Custodian
shall promptly notify the Trustee and the Custodian shall within five Business
Days (or such other reasonable period of time mutually agreed upon by the
Custodian and the Trustee) of its receipt of such notice deliver each previously
unrecorded assignment to the related Servicer for recordation.

            (d) Except for Mortgage Notes endorsed in blank, endorsements shall
comply with the following format:

                                WITHOUT RECOURSE
                              PAY TO THE ORDER OF:
                     WACHOVIA BANK, NATIONAL ASSOCIATION, AS
                     TRUSTEE under the pooling and servicing
                          agreement dated as of [date];
                         and its successors and assigns,

           [Wells Fargo Bank, N.A.] or [Wells Fargo Home Mortgage, Inc.]
                             [Signature of Officer]
                           [Officer's Name and Title]

            Except where assignments in blank are authorized or in the case of
any Mortgage registered in the name of MERS, assignments of any Mortgage shall
comply with the following:

                     WACHOVIA BANK, NATIONAL ASSOCIATION, AS
                                     TRUSTEE
                         and its successors and assigns

            Section 2.02 Acceptance by Custodian.

            Subject to the provisions of the following paragraph, pursuant to
the Custodial Agreement, the Custodian, on behalf of the Trustee, will declare
that it holds and will hold the documents delivered to it pursuant to Section
2.01 above and the other documents constituting a part of the Owner Mortgage
Loan Files or Retained Mortgage Loan Files (after the occurrence of a Document
Transfer Event) delivered to it in trust, upon the trusts herein set forth, for
the use and benefit of all present and future Certificateholders. Upon execution
of this Agreement, the Custodian will deliver to the Seller and the Trustee an
initial certification in the form of Exhibit N hereto, to the effect that,
except as may be specified in a list of exceptions attached thereto, it has
received the original Mortgage Notes relating to each Mortgage Loan on the
Mortgage Loan Schedule.

            The Custodian will review each Owner Mortgage Loan File within 45
days after execution of this Agreement. The Custodian will deliver no later than
30 days after completion of such review to the Seller and the Trustee a final
certification in the form of Exhibit O hereto to the effect that, except as may
be specified in a list of exceptions attached thereto, all required documents
set forth in Section 2.01(a) have been executed and received and appear regular
on their face, and that such documents relate to the Mortgage Loans identified
in the Mortgage Loan Schedule based on a comparison of the Mortgage Loan
identifying number, Mortgagor name and street address, and in so doing the
Custodian may rely on the purported due execution and genuineness of any such
document and on the purported genuineness of any signature thereon.

             If within such 45 day period the Custodian finds any document
constituting a part of an Owner Mortgage Loan File not to have been executed or
received or to be unrelated to the Mortgage Loans identified in the Mortgage
Loan Schedule or not to appear regular on its face, the Custodian shall promptly
(and in no event more than 30 days after completion of the review) notify the
Trustee and the Trustee shall notify the Seller. The Seller shall have a period
of 60 days after the date of such notice within which to correct or cure any
such defect. The Seller hereby covenants and agrees that, if any material defect
is not so corrected or cured, the Seller will, not later than 60 days after the
Trustee's notice to it referred to above respecting such defect, either (i)
repurchase the related Mortgage Loan or any property acquired in respect thereof
from the Trust Estate at a price equal to (a) 100% of the unpaid principal
balance of such Mortgage Loan plus (b) accrued interest at the Mortgage Interest
Rate through the last day of the month in which such repurchase takes place or
(ii) if within two years of the Startup Day, or such other period permitted by
the REMIC Provisions, substitute for any Mortgage Loan to which such material
defect relates, a new mortgage loan (a "Substitute Mortgage Loan") having such
characteristics so that the representations and warranties of the Seller set
forth in Section 2.03(b) hereof (other than Section 2.03(b)(i)) would not have
been incorrect had such Substitute Mortgage Loan originally been a Mortgage
Loan. In no event shall any Substitute Mortgage Loan have an unpaid principal
balance, as of the date of substitution, greater than the Scheduled Principal
Balance (reduced by the scheduled payment of principal due on the Due Date in
the month of substitution) of the Mortgage Loan for which it is substituted. In
addition, such Substitute Mortgage Loan (i) shall have a Loan-to-Value Ratio
less than or equal to and a Net Mortgage Interest Rate equal to that of the
Mortgage Loan for which it is substituted, (ii) shall have the same Gross Margin
and Index as that of the Mortgage Loan for which it is substituted and (iii)
shall have the same frequency of mortgage rate adjustment as that of the
Mortgage Loan for which it is substituted.

            In the case of a repurchased Mortgage Loan or property, the purchase
price shall be deposited by the Seller in the Certificate Account maintained by
the Master Servicer pursuant to Section 3.01. In the case of a Substitute
Mortgage Loan, the Owner Mortgage Loan File (and Retained Mortgage Loan File, if
required pursuant to Section 2.01(b) hereof) relating thereto shall be delivered
to the Custodian and the Substitution Principal Amount, together with (i)
interest on such Substitution Principal Amount at the applicable Net Mortgage
Interest Rate to the following Due Date of such Mortgage Loan which is being
substituted for and (ii) an amount equal to the aggregate amount of unreimbursed
Periodic Advances in respect of interest previously made by the Servicer, the
Master Servicer or the Trustee with respect to such Mortgage Loan, shall be
deposited in the Certificate Account. The Monthly Payment on the Substitute
Mortgage Loan for the Due Date in the month of substitution shall not be part of
the Trust Estate. Upon receipt by the Custodian of a Request for Release signed
by an officer of the Seller, the Custodian shall release to the Seller the
related Owner Mortgage Loan File (and Retained Mortgage Loan File, if
applicable). The Trustee shall execute and deliver such instrument of transfer
or assignment (or, in the case of a Mortgage Loan registered in the name of MERS
or its designee, the Master Servicer shall cause the applicable Servicer to take
all necessary action to reflect such assignment on the records of MERS), in each
case without recourse, as shall be necessary to vest in the Seller legal and
beneficial ownership of such substituted or repurchased Mortgage Loan or
property. It is understood and agreed that the obligation of the Seller to
substitute a new Mortgage Loan for or repurchase any Mortgage Loan or property
as to which such a material defect in a constituent document exists shall
constitute the sole remedy respecting such defect available to the
Certificateholders or the Trustee on behalf of the Certificateholders. The
failure of the Custodian to give the final certification or the Trustee to give
any notice within the required time periods shall not affect or relieve the
Seller's obligation to repurchase any Mortgage Loan pursuant to this Section
2.02.

            Section 2.03 Representations and Warranties of the Master Servicer
                         and the Seller.

            (a) The Master Servicer hereby represents and warrants to the
Trustee for the benefit of Certificateholders that, as of the date of execution
of this Agreement:

            (i) The Master Servicer is a national banking association duly
      chartered and validly existing in good standing under the laws of the
      United States;

            (ii) The execution and delivery of this Agreement by the Master
      Servicer and its performance and compliance with the terms of this
      Agreement will not violate the Master Servicer's corporate charter or
      by-laws or constitute a default (or an event which, with notice or lapse
      of time, or both, would constitute a default) under, or result in the
      breach of, any material contract, agreement or other instrument to which
      the Master Servicer is a party or which may be applicable to the Master
      Servicer or any of its assets;

            (iii) This Agreement, assuming due authorization, execution and
      delivery by the Trustee and the Seller, constitutes a valid, legal and
      binding obligation of the Master Servicer, enforceable against it in
      accordance with the terms hereof subject to applicable bankruptcy,
      insolvency, reorganization, moratorium and other laws affecting the
      enforcement of creditors' rights generally and to general principles of
      equity, regardless of whether such enforcement is considered in a
      proceeding in equity or at law;

            (iv) The Master Servicer is not in default with respect to any order
      or decree of any court or any order, regulation or demand of any federal,
      state, municipal or governmental agency, which default might have
      consequences that would materially and adversely affect the condition
      (financial or other) or operations of the Master Servicer or its
      properties or might have consequences that would affect its performance
      hereunder; and

            (v) No litigation is pending or, to the best of the Master
Servicer's knowledge, threatened against the Master Servicer which would
prohibit its entering into this Agreement or performing its obligations under
this Agreement.

            It is understood and agreed that the representations and warranties
set forth in this Section 2.03(a) shall survive delivery of the respective Owner
Mortgage Loan Files to the Trustee or the Custodian.

            (b) The Seller hereby represents and warrants to the Trustee for the
benefit of Certificateholders that, as of the date of execution of this
Agreement, with respect to the Mortgage Loans, or each Mortgage Loan, as the
case may be:

             (i) The information set forth in the Mortgage Loan Schedule was true
      and correct in all material respects at the date or dates respecting which
      such information is furnished as specified in the Mortgage Loan Schedule;

            (ii) Immediately prior to the transfer and assignment contemplated
      herein, the Seller was the sole owner and holder of the Mortgage Loan free
      and clear of any and all liens, pledges, charges or security interests of
      any nature and has full right and authority to sell and assign the same;

            (iii) The Mortgage is a valid, subsisting and enforceable first lien
      on the property therein described, and the Mortgaged Property is free and
      clear of all encumbrances and liens having priority over the first lien of
      the Mortgage except for liens for real estate taxes and special
      assessments not yet due and payable and liens or interests arising under
      or as a result of any federal, state or local law, regulation or ordinance
      relating to hazardous wastes or hazardous substances, and, if the related
      Mortgaged Property is a condominium unit, any lien for common charges
      permitted by statute or homeowners association fees; and if the Mortgaged
      Property consists of shares of a cooperative housing corporation, any lien
      for amounts due to the cooperative housing corporation for unpaid
      assessments or charges or any lien of any assignment of rents or
      maintenance expenses secured by the real property owned by the cooperative
      housing corporation; and any security agreement, chattel mortgage or
      equivalent document related to, and delivered to the Trustee or to the
      Custodian with, any Mortgage establishes in the Seller a valid and
      subsisting first lien on the property described therein and the Seller has
      full right to sell and assign the same to the Trustee;

            (iv) Neither the Seller nor any prior holder of the Mortgage or the
      related Mortgage Note has modified the Mortgage or the related Mortgage
      Note in any material respect, satisfied, canceled or subordinated the
      Mortgage in whole or in part, released the Mortgaged Property in whole or
      in part from the lien of the Mortgage, or executed any instrument of
      release, cancellation, modification or satisfaction, except in each case
      as is reflected in an agreement delivered to the Trustee or the Custodian
      pursuant to Section 2.01(a);

            (v) All taxes, governmental assessments, insurance premiums, and
      water, sewer and municipal charges, which previously became due and owing
      have been paid, or an escrow of funds has been established, to the extent
      permitted by law, in an amount sufficient to pay for every such item which
      remains unpaid; and the Seller has not advanced funds, or received any
      advance of funds by a party other than the Mortgagor, directly or
      indirectly (except pursuant to any Subsidy Loan arrangement) for the
      payment of any amount required by the Mortgage, except for interest
      accruing from the date of the Mortgage Note or date of disbursement of the
      Mortgage Loan proceeds, whichever is later, to the day which precedes by
      thirty days the first Due Date under the related Mortgage Note;

            (vi) The Mortgaged Property is undamaged by water, fire, earthquake,
      earth movement other than earthquake, windstorm, flood, tornado or similar
      casualty (excluding casualty from the presence of hazardous wastes or
      hazardous substances, as to which the Seller makes no representations), so
      as to affect adversely the value of the Mortgaged Property as security for
      the Mortgage Loan or the use for which the premises were intended and to
      the best of the Seller's knowledge, there is no proceeding pending or
      threatened for the total or partial condemnation of the Mortgaged
      Property;

            (vii) The Mortgaged Property is free and clear of all mechanics' and
       materialmen's liens or liens in the nature thereof; provided, however,
      that this warranty shall be deemed not to have been made at the time of
      the initial issuance of the Certificates if a title policy affording, in
      substance, the same protection afforded by this warranty is furnished to
      the Trustee by the Seller;

            (viii) Except for Mortgage Loans secured by Co-op Shares and
      Mortgage Loans secured by residential long-term leases, the Mortgaged
      Property consists of a fee simple estate in real property; all of the
      improvements which are included for the purpose of determining the
      appraised value of the Mortgaged Property lie wholly within the boundaries
      and building restriction lines of such property and no improvements on
      adjoining properties encroach upon the Mortgaged Property (unless insured
      against under the related title insurance policy); and to the best of the
      Seller's knowledge, the Mortgaged Property and all improvements thereon
      comply with all requirements of any applicable zoning and subdivision laws
      and ordinances;

            (ix) The Mortgage Loan meets, or is exempt from, applicable state or
      federal laws, regulations and other requirements, pertaining to usury, and
      the Mortgage Loan is not usurious;

            (x) To the best of the Seller's knowledge, all inspections, licenses
      and certificates required to be made or issued with respect to all
      occupied portions of the Mortgaged Property and, with respect to the use
      and occupancy of the same, including, but not limited to, certificates of
      occupancy and fire underwriting certificates, have been made or obtained
      from the appropriate authorities;

            (xi) All payments required to be made up to the Due Date immediately
      preceding the Cut-Off Date for such Mortgage Loan under the terms of the
      related Mortgage Note have been made and no Mortgage Loan had more than
      one delinquency in the 12 months preceding the Cut-Off Date;

            (xii) The Mortgage Note, the related Mortgage and other agreements
      executed in connection therewith are genuine, and each is the legal, valid
      and binding obligation of the maker thereof, enforceable in accordance
      with its terms, except as such enforcement may be limited by bankruptcy,
      insolvency, reorganization or other similar laws affecting the enforcement
      of creditors' rights generally and by general equity principles
      (regardless of whether such enforcement is considered in a proceeding in
      equity or at law); and, to the best of the Seller's knowledge, all parties
      to the Mortgage Note and the Mortgage had legal capacity to execute the
      Mortgage Note and the Mortgage and each Mortgage Note and Mortgage has
      been duly and properly executed by the Mortgagor;

            (xiii) Each Mortgage Loan at the time it was originated complied in
      all material respects with applicable federal, state and local laws
      including, without limitation, truth-in-lending, real estate settlement
      procedures, consumer credit protection, equal credit opportunity,
      predatory and abusive lending laws and disclosure laws;

            (xiv) The proceeds of the Mortgage Loans have been fully disbursed,
      there is no requirement for future advances thereunder and any and all
      requirements as to completion of any on-site or off-site improvements and
      as to disbursements of any escrow funds therefor have been complied with
      (except for escrow funds for exterior items which could not be completed
      due to weather and escrow funds for the completion of swimming pools); and
      all costs, fees and expenses incurred in making, closing or recording the
      Mortgage Loan have been paid, except recording fees with respect to
      Mortgages not recorded as of the Closing Date;

            (xv) The Mortgage Loan (except any Mortgage Loan secured by a
      Mortgaged Property located in any jurisdiction, as to which an opinion of
      counsel of the type customarily rendered in such jurisdiction in lieu of
      title insurance is instead received) is covered by an American Land Title
      Association mortgagee title insurance policy or other generally acceptable
      form of policy or insurance acceptable to Fannie Mae or Freddie Mac,
      issued by a title insurer acceptable to Fannie Mae or Freddie Mac insuring
      the originator, its successors and assigns, as to the first priority lien
       of the Mortgage in the original principal amount of the Mortgage Loan and
      subject only to (A) the lien of current real property taxes and
      assessments not yet due and payable, (B) covenants, conditions and
      restrictions, rights of way, easements and other matters of public record
      as of the date of recording of such Mortgage acceptable to mortgage
      lending institutions in the area in which the Mortgaged Property is
      located or specifically referred to in the appraisal performed in
      connection with the origination of the related Mortgage Loan, (C) liens
      created pursuant to any federal, state or local law, regulation or
      ordinance affording liens for the costs of clean-up of hazardous
      substances or hazardous wastes or for other environmental protection
      purposes and (D) such other matters to which like properties are commonly
      subject which do not individually, or in the aggregate, materially
      interfere with the benefits of the security intended to be provided by the
      Mortgage; the Seller is the sole insured of such mortgagee title insurance
      policy, the assignment to the Trustee of the Seller's interest in such
      mortgagee title insurance policy does not require any consent of or
      notification to the insurer which has not been obtained or made, such
      mortgagee title insurance policy is in full force and effect and will be
      in full force and effect and inure to the benefit of the Trustee, no
      claims have been made under such mortgagee title insurance policy, and no
      prior holder of the related Mortgage, including the Seller, has done, by
      act or omission, anything which would impair the coverage of such
      mortgagee title insurance policy;

             (xvi) The Mortgaged Property securing each Mortgage Loan is insured
      by an insurer acceptable to Fannie Mae or Freddie Mac against loss by fire
      and such hazards as are covered under a standard extended coverage
      endorsement, in an amount which is not less than the lesser of 100% of the
      insurable value of the Mortgaged Property and the outstanding principal
      balance of the Mortgage Loan, but in no event less than the minimum amount
      necessary to fully compensate for any damage or loss on a replacement cost
      basis; if the Mortgaged Property is a condominium unit, it is included
      under the coverage afforded by a blanket policy for the project; if upon
      origination of the Mortgage Loan, the improvements on the Mortgaged
      Property were in an area identified in the Federal Register by the Federal
      Emergency Management Agency as having special flood hazards, a flood
      insurance policy meeting the requirements of the current guidelines of the
      Federal Insurance Administration is in effect with a generally acceptable
      insurance carrier, in an amount representing coverage not less than the
      least of (A) the outstanding principal balance of the Mortgage Loan, (B)
      the full insurable value of the Mortgaged Property and (C) the maximum
      amount of insurance which was available under the National Flood Insurance
      Act of 1968, as amended; and each Mortgage obligates the Mortgagor
      thereunder to maintain all such insurance at the Mortgagor's cost and
      expense;

            (xvii) To the best of the Seller's knowledge, there is no default,
      breach, violation or event of acceleration existing under the Mortgage or
      the related Mortgage Note and no event which, with the passage of time or
      with notice and the expiration of any grace or cure period, would
      constitute a default, breach, violation or event of acceleration; the
      Seller has not waived any default, breach, violation or event of
      acceleration; and no foreclosure action is currently threatened or has
      been commenced with respect to the Mortgage Loan;

            (xviii) No Mortgage Note or Mortgage is subject to any right of
      rescission, set-off, counterclaim or defense, including the defense of
      usury, nor will the operation of any of the terms of the Mortgage Note or
      Mortgage, or the exercise of any right thereunder, render the Mortgage
      Note or Mortgage unenforceable, in whole or in part, or subject it to any
       right of rescission, set-off, counterclaim or defense, including the
      defense of usury, and no such right of rescission, set-off, counterclaim
      or defense has been asserted with respect thereto;

            (xix) Each Mortgage Note is payable in monthly payments, resulting
      in complete amortization of the Mortgage Loan over a term of not more than
      360 months;

            (xx) Each Mortgage contains customary and enforceable provisions
      such as to render the rights and remedies of the holder thereof adequate
      for the realization against the Mortgaged Property of the benefits of the
      security, including realization by judicial foreclosure (subject to any
      limitation arising from any bankruptcy, insolvency or other law for the
      relief of debtors), and there is no homestead or other exemption available
      to the Mortgagor which would interfere with such right of foreclosure;

            (xxi) To the best of the Seller's knowledge, no Mortgagor is a
      debtor in any state or federal bankruptcy or insolvency proceeding;

            (xxii) Each Mortgaged Property is located in the United States and
      consists of a one- to four-unit residential property, which may include a
      detached home, townhouse, condominium unit or a unit in a planned unit
      development or, in the case of Mortgage Loans secured by Co-op Shares,
      leases or occupancy agreements;

            (xxiii) The Mortgage Loan is a "qualified mortgage" within the
      meaning of Section 860G(a)(3) of the Code;

            (xxiv) With respect to each Mortgage where a lost note affidavit has
      been delivered to the Trustee in place of the related Mortgage Note, the
      related Mortgage Note is no longer in existence;

             (xxv) In the event that the Mortgagor is an inter vivos "living"
      trust, (i) such trust is in compliance with Fannie Mae or Freddie Mac
      standards for inter vivos trusts and (ii) holding title to the Mortgaged
      Property in such trust will not diminish any rights as a creditor
      including the right to full title to the Mortgaged Property in the event
      foreclosure proceedings are initiated;

            (xxvi) If the Mortgage Loan is secured by a long-term residential
      lease, (1) the lessor under the lease holds a fee simple interest in the
      land; (2) the terms of such lease expressly permit the mortgaging of the
      leasehold estate, the assignment of the lease without the lessor's consent
      and the acquisition by the holder of the Mortgage of the rights of the
      lessee upon foreclosure or assignment in lieu of foreclosure or provide
      the holder of the Mortgage with substantially similar protections; (3) the
      terms of such lease do not (a) allow the termination thereof upon the
      lessee's default without the holder of the Mortgage being entitled to
      receive written notice of, and opportunity to cure, such default, (b)
      allow the termination of the lease in the event of damage or destruction
      as long as the Mortgage is in existence, (c) prohibit the holder of the
      Mortgage from being insured (or receiving proceeds of insurance) under the
      hazard insurance policy or policies relating to the Mortgaged Property or
      (d) permit any increase in rent other than pre-established increases set
      forth in the lease; (4) the original term of such lease is not less than
      15 years; (5) the term of such lease does not terminate earlier than five
      years after the maturity date of the Mortgage Note; and (6) the Mortgaged
      Property is located in a jurisdiction in which the use of leasehold
      estates in transferring ownership in residential properties is a widely
      accepted practice;

            (xxvii) No Mortgage Loan is a "high cost" loan as defined under any
      federal, state or local law applicable to such Mortgage Loan at the time
      of its origination; and

            (xxviii) No Mortgage Loan is serviced by the Trustee or an affiliate
      of the Trustee.

            Notwithstanding the foregoing, no representations or warranties are
made by the Seller as to the environmental condition of any Mortgaged Property;
the absence, presence or effect of hazardous wastes or hazardous substances on
any Mortgaged Property; any casualty resulting from the presence or effect of
hazardous wastes or hazardous substances on, near or emanating from any
Mortgaged Property; the impact on Certificateholders of any environmental
condition or presence of any hazardous substance on or near any Mortgaged
Property; or the compliance of any Mortgaged Property with any environmental
laws, nor is any agent, person or entity otherwise affiliated with the Seller
authorized or able to make any such representation, warranty or assumption of
liability relative to any Mortgaged Property. In addition, no representations or
warranties are made by the Seller with respect to the absence or effect of fraud
in the origination of any Mortgage Loan.

            It is understood and agreed that the representations and warranties
set forth in this Section 2.03(b) shall survive delivery of the respective Owner
Mortgage Loan Files (and Retained Mortgage Loan Files, if applicable) to the
Custodian and shall inure to the benefit of the Trustee notwithstanding any
restrictive or qualified endorsement or assignment.

            (c) Upon discovery by either the Seller, the Master Servicer, the
Trustee or the Custodian that any of the representations and warranties made in
subsection (b) above is not accurate (referred to herein as a "breach") and,
except for a breach of the representation and warranty set forth in subsection
(b)(i), where such breach is a result of the Cut-Off Date Principal Balance of a
Mortgage Loan being greater, by $5,000 or greater, than the Cut-Off Date
Principal Balance of such Mortgage Loan indicated on the Mortgage Loan Schedule,
that such breach materially and adversely affects the interests of the
Certificateholders in the related Mortgage Loan, the party discovering such
breach shall give prompt written notice to the other parties (any Custodian
being so obligated under a Custodial Agreement). Within 60 days of the earlier
of its discovery or its receipt of notice of any such breach, the Seller shall
cure such breach in all material respects or shall either (i) repurchase the
Mortgage Loan or any property acquired in respect thereof from the Trust Estate
at a price equal to (A) 100% of the unpaid principal balance of such Mortgage
Loan plus (B) accrued interest at the Net Mortgage Interest Rate for such
Mortgage Loan through the last day of the month in which such repurchase took
place or (ii) if within two years of the Startup Day, or such other period
permitted by the REMIC Provisions, substitute for such Mortgage Loan in the
manner described in Section 2.02. In addition to the foregoing, if a breach of
the representation set forth in clause (b)(xiii) or (xxix) of this Section 2.03
occurs as a result of a violation of an applicable predatory or abusive lending
law, the Seller shall reimburse the Trust for all costs and damages including,
but not limited to, reasonable attorneys' fees and costs, incurred by the Trust
as a result of the violation of such law (such amount, the "Reimbursement
Amount"). The purchase price of any repurchase described in this paragraph, the
Substitution Principal Amount, if any, plus accrued interest thereon and the
other amounts referred to in Section 2.02, and any Reimbursement Amount shall be
deposited in the Certificate Account. It is understood and agreed, except with
respect to the second preceding sentence, that the obligation of the Seller to
repurchase or substitute for any Mortgage Loan or property as to which such a
breach has occurred and is continuing shall constitute the sole remedy
respecting such breach available to Certificateholders or the Trustee on behalf
of Certificateholders, and such obligation shall survive until termination of
the Trust Estate hereunder.

            Section 2.04 Execution and Delivery of Certificates.

            The Trustee acknowledges (i) the assignment to it of the Mortgage
Loans and (ii) the issuance of and hereby declares that it holds the
Uncertificated Lower-Tier Interests on behalf of the Upper-Tier REMIC and
Certificateholders. The Trustee acknowledges the delivery of the Owner Mortgage
Loan Files to the Custodian on behalf of the Trustee, and, concurrently with
such delivery has executed and delivered to or upon the order of the Seller, in
exchange for the Mortgage Loans and Uncertificated Lower-Tier Interests,
together with all other assets included in the definition of "Trust Estate",
receipt of which is hereby acknowledged, Certificates in authorized
denominations which, together with the Uncertificated Lower-Tier Interests,
evidence ownership of the entire Trust Estate.

            Section 2.05 Designation of Certificates; Designation of Startup Day
                         and Latest Possible Maturity Date.

            The Seller hereby designates the Classes of Class A Certificates
(other than the Class II-A-R and Class II-A-LR Certificates) and the Classes of
Class B Certificates as classes of "regular interests" and the Class II-A-R
Certificate as the single class of "residual interest" in the Upper-Tier REMIC
for the purposes of Code Sections 860G(a)(1) and 860G(a)(2), respectively. The
Seller hereby further designates the Class I-L Interest, Class I-LS Interest,
Class II-L Interest, and Class II-LS Interest as classes of "regular interests"
and the Class II-A-LR Interest as the single class of "residual interest" in the
Lower-Tier REMIC for the purposes of Code Sections 860G(a)(1) and 860G(a)(2),
respectively. The Closing Date is hereby designated as the "Startup Day" of each
of the Upper-Tier REMIC and the Lower-Tier REMIC within the meaning of Code
Section 860G(a)(9). The "latest possible maturity date" of the regular interests
in the Upper-Tier REMIC and the Lower-Tier REMIC is January 25, 2035 for
purposes of Code Section 860G(a)(1).

            Section 2.06 Optional Substitution of Mortgage Loans.

            During the three-month period beginning on the Startup Date, the
Seller shall have the right, but not the obligation, in its sole discretion for
any reason, to substitute for any Group I or Group II Mortgage Loan, a
Substitute Mortgage Loan meeting the requirements of Section 2.02. Any such
substitution shall be carried out in the manner described in Section 2.02. The
Substitution Principal Amount, if any, plus accrued interest thereon and the
other amounts referred to in Section 2.02, shall be deposited in the Certificate
Account.

                                   ARTICLE III

                  ADMINISTRATION OF THE TRUST ESTATE; SERVICING
                              OF THE MORTGAGE LOANS

            Section 3.01 Certificate Account.

            (a) The Master Servicer shall establish and maintain a Certificate
Account for the deposit of funds received by the Master Servicer with respect to
the Mortgage Loans serviced by each Servicer pursuant to each of the Servicing
Agreements. Such account shall be maintained as an Eligible Account. The Master
Servicer shall give notice to each Servicer and the Seller of the location of
the Certificate Account and of any change in the location thereof.

            (b) The Master Servicer shall deposit into the Certificate Account
on the day of receipt thereof all amounts received by it from any Servicer
pursuant to any of the Servicing Agreements and amounts received from draws on
any Letters of Credit and shall, in addition, deposit into the Certificate
Account the following amounts, in the case of amounts specified in clause (i),
not later than the Business Day preceding the Distribution Date on which such
amounts are required to be distributed to Certificateholders and, in the case of
the amounts specified in clause (ii), not later than the Business Day next
following the day of receipt and posting by the Master Servicer:

            (i) Periodic Advances pursuant to Section 3.03(a) made by the Master
      Servicer or the Trustee, if any and any amounts deemed received by the
      Master Servicer pursuant to Section 3.01(d); and

            (ii) in the case of any Mortgage Loan that is repurchased by the
      Seller pursuant to Section 2.02, 2.03, 3.08 or 9.01 or that is auctioned
      by the Master Servicer pursuant to Section 3.08, the purchase price
      therefor or, where applicable, any Substitution Principal Amount and any
      amounts received in respect of the interest portion of unreimbursed
      Periodic Advances.

            (c) The Master Servicer shall cause the funds in the Certificate
Account to be invested in Eligible Investments. No such Eligible Investments
will be sold or disposed of at a gain prior to maturity unless the Master
Servicer has received an Opinion of Counsel or other evidence satisfactory to it
that such sale or disposition will not cause the Trust Estate to be subject to
Prohibited Transactions Tax, otherwise subject the Trust Estate to tax, or cause
either the Upper-Tier REMIC or the Lower-Tier REMIC to fail to qualify as a
REMIC while any Certificates are outstanding. Any amounts deposited in the
Certificate Account prior to the Distribution Date shall be invested for the
account of the Master Servicer and any investment income thereon shall be
additional compensation to the Master Servicer for services rendered under this
Agreement. The amount of any losses incurred in respect of any such investments
shall be deposited in the Certificate Account by the Master Servicer out of its
own funds immediately as realized, without any right of reimbursement therefor
from the Trust Estate.

            (d) For purposes of this Agreement, the Master Servicer will be
deemed to have received from a Servicer on the applicable Remittance Date for
such funds all amounts deposited by such Servicer into the Custodial P&I Account
maintained in accordance with the applicable Servicing Agreement, if such
Custodial P&I Account is not an Eligible Account as defined in this Agreement,
to the extent such amounts are not actually received by the Master Servicer on
such Remittance Date as a result of the bankruptcy, insolvency, receivership or
other financial distress of the depository institution in which such Custodial
P&I Account is being held. To the extent that amounts so deemed to have been
received by the Master Servicer are subsequently remitted to the Master
Servicer, the Master Servicer shall be entitled to retain such amounts.

            Section 3.02 Permitted Withdrawals from the Certificate Account.

            (a) The Master Servicer may, from time to time, make withdrawals
from the Certificate Account for the following purposes (limited, in the case of
Servicer reimbursements, to cases where funds in the respective Custodial P&I
Account are not sufficient therefor):

             (i) to reimburse the Master Servicer, the Trustee or any Servicer
      for Periodic Advances made by the Master Servicer or the Trustee pursuant
      to Section 3.03(a) or any Servicer pursuant to any Servicing Agreement
      with respect to previous Distribution Dates, such right to reimbursement
      pursuant to this subclause (i) being limited to amounts received on or in
      respect of particular Mortgage Loans (including, for this purpose,
      Liquidation Proceeds, REO Proceeds and proceeds from the purchase, sale,
      repurchase or substitution of Mortgage Loans pursuant to Section 2.02,
      2.03, 2.06, 3.08 or 9.01) respecting which any such Periodic Advance was
      made;

            (ii) to reimburse any Servicer, the Master Servicer or the Trustee
      for any Periodic Advances determined in good faith to have become
      Nonrecoverable Advances;

            (iii) to reimburse the Master Servicer or any Servicer from
      Liquidation Proceeds for Liquidation Expenses and for amounts expended by
      the Master Servicer or any Servicer pursuant hereto or to any Servicing
      Agreement, respectively, in good faith in connection with the restoration
      of damaged property or for foreclosure expenses;

            (iv) from any Mortgagor payment on account of interest or other
      recovery (including Net REO Proceeds) with respect to a particular
      Mortgage Loan, to pay the Master Servicing Fee with respect to such
      Mortgage Loan to the Master Servicer;

             (v) to reimburse the Master Servicer, any Servicer or the Trustee
      (or, in certain cases, the Seller) for expenses incurred by it (including
      taxes paid on behalf of the Trust Estate) and recoverable by or
      reimbursable to it pursuant to Section 3.03(c), 3.03(d), 3.09 or 6.03 or
      the second sentence of Section 8.13(a) or pursuant to such Servicer's
      Servicing Agreement, provided such expenses are "unanticipated" within the
      meaning of the REMIC Provisions;

            (vi) to pay to the Seller or other purchaser with respect to each
      Mortgage Loan or property acquired in respect thereof that has been
      repurchased or replaced pursuant to Section 2.02, 2.03, 2.06, 3.08 or 9.01
      or auctioned pursuant to Section 3.08, all amounts received thereon and
      not required to be distributed as of the date on which the related
      repurchase or purchase price or Scheduled Principal Balance was
      determined;

            (vii) to remit funds to the Paying Agent in the amounts and in the
      manner provided for herein;

            (viii) to pay to the Master Servicer any interest earned on or
      investment income with respect to funds in the Certificate Account;

            (ix) to pay to the Master Servicer or any Servicer out of
      Liquidation Proceeds allocable to interest the amount of any unpaid Master
      Servicing Fee or Servicing Fee (as adjusted pursuant to the related
      Servicing Agreement) and any unpaid assumption fees, late payment charges
      or other Mortgagor charges on the related Mortgage Loan;

            (x) to pay to the Master Servicer as additional master servicing
      compensation any Liquidation Profits which a Servicer is not entitled to
      pursuant to the applicable Servicing Agreement;

            (xi) to withdraw from the Certificate Account any amount deposited
      in the Certificate Account that was not required to be deposited therein;
      and

            (xii) to clear and terminate the Certificate Account pursuant to
      Section 9.01.

            (b) The Master Servicer shall keep and maintain separate accounting,
on a Mortgage Loan by Mortgage Loan basis, for the purpose of justifying any
payment to and withdrawal from the Certificate Account.

             Section 3.03 Advances by Master Servicer and Trustee.

            (a) In the event an Other Servicer fails to make any required
Periodic Advances of principal and interest on a Mortgage Loan as required by
the related Other Servicing Agreement prior to the Business Day preceding the
Distribution Date occurring in the month during which such Periodic Advance is
due, the Master Servicer shall make Periodic Advances to the extent provided
hereby. In the event Wells Fargo Bank in its capacity as Servicer fails to make
any required Periodic Advances of principal and interest on a Mortgage Loan as
required by the Wells Fargo Bank Servicing Agreement prior to the Business Day
preceding the Distribution Date occurring in the month during which such
Periodic Advance is due, the Trustee shall, to the extent required by Section
8.14, make such Periodic Advance to the extent provided hereby, provided that
the Trustee has previously received the certificate of the Master Servicer
described in the following sentence. The Master Servicer shall certify to the
Trustee with respect to any such Distribution Date (i) the amount of Periodic
Advances required of Wells Fargo Bank in its capacity as Servicer or such Other
Servicer, as the case may be, (ii) the amount actually advanced by Wells Fargo
Bank in its capacity as Servicer or such Other Servicer, (iii) the amount that
the Trustee or Master Servicer is required to advance hereunder and (iv) whether
the Master Servicer has determined that it reasonably believes that such
Periodic Advance is a Nonrecoverable Advance. Amounts advanced by the Trustee or
Master Servicer shall be deposited in the Certificate Account on the related
Business Day preceding the Distribution Date. Notwithstanding the foregoing,
neither the Master Servicer nor the Trustee will be obligated to make a Periodic
Advance that it reasonably believes to be a Nonrecoverable Advance. The Trustee
may conclusively rely for any determination to be made by it hereunder upon the
determination of the Master Servicer as set forth in its certificate.

            (b) To the extent an Other Servicer fails to make an advance on
account of the taxes or insurance premiums with respect to a Mortgage Loan
required pursuant to the related Other Servicing Agreement, the Master Servicer
shall, if the Master Servicer has actual knowledge of such failure of the
Servicer, advance such funds and take such steps as are necessary to pay such
taxes or insurance premiums. To the extent Wells Fargo Bank in its capacity as
Servicer fails to make an advance on account of the taxes or insurance premiums
with respect to a Mortgage Loan required pursuant to the Wells Fargo Bank
Servicing Agreement, the Master Servicer shall, if the Master Servicer knows of
such failure of Wells Fargo Bank in its capacity as Servicer, certify to the
Trustee that such failure has occurred. Upon receipt of such certification, the
Trustee shall advance such funds and take such steps as are necessary to pay
such taxes or insurance premiums.

            (c) The Master Servicer and the Trustee shall each be entitled to be
reimbursed from the Certificate Account for any Periodic Advance made by it
under Section 3.03(a) to the extent described in Section 3.02(a)(i). The Master
Servicer and the Trustee shall be entitled to be reimbursed pursuant to Section
3.02(a)(v) for any advance by it pursuant to Section 3.03(b). The Master
Servicer shall diligently pursue restoration of such amount to the Certificate
Account from the related Servicer. The Master Servicer shall, to the extent it
has not already done so, upon the request of the Trustee, withdraw from the
Certificate Account and remit to the Trustee any amounts to which the Trustee is
entitled as reimbursement pursuant to Section 3.02 (a)(i) and (v).

            (d) Except as provided in Section 3.03(a) and (b), neither the
Master Servicer nor the Trustee shall be required to pay or advance any amount
which any Servicer was required, but failed, to deposit in the Certificate
Account.

            Section 3.04 Custodian to Cooperate; Release of Owner Mortgage Loan
                         Files and Retained Mortgage Loan Files.

            In connection with the deposit by a Servicer into the Certificate
Account of the proceeds from a Liquidated Loan or of a Prepayment in Full, the
Master Servicer or applicable Servicer shall confirm to the Trustee that all
amounts required to be remitted to the Certificate Account in connection with
such Mortgage Loan have been so deposited, and the Master Servicer or applicable
Servicer shall deliver two copies of such Request for Release to the Custodian.
The Custodian shall, within five Business Days of its receipt of such a Request
for Release, release the related Owner Mortgage Loan File (and Retained Mortgage
Loan File, if applicable) to the Master Servicer or such Servicer, as requested
by the Master Servicer or such Servicer. No expenses incurred in connection with
any instrument of satisfaction or deed of reconveyance shall be chargeable to
the Certificate Account.

            From time to time and as appropriate for the servicing or
foreclosure of any Mortgage Loan, including but not limited to, collection under
any insurance policies, or to effect a partial release of any Mortgaged Property
from the lien of the Mortgage, the Servicer of such Mortgage Loan shall deliver
to the Master Servicer or Custodian two copies of a Request for Release. Upon
the Master Servicer's receipt of any such Request for Release, the Master
Servicer shall promptly forward such request in hard copy or in electronic
format acceptable to the Custodian. The Custodian shall, within five Business
Days, release the related Owner Mortgage Loan File (and Retained Mortgage Loan
File, if applicable) to the Master Servicer or such Servicer. Any such Request
for Release shall obligate the Master Servicer or such Servicer, as the case may
be, to return the Owner Mortgage Loan File (and Retained Mortgage Loan File, if
applicable) to the Custodian by the twenty-first day following the release
thereof, unless (i) the Mortgage Loan has been liquidated and the Liquidation
Proceeds relating to the Mortgage Loan have been deposited in the Certificate
Account or (ii) the Owner Mortgage Loan File, Retained Mortgage Loan File, if
applicable, or such document has been delivered to an attorney, or to a public
trustee or other public official as required by law, for purposes of initiating
or pursuing legal action or other proceedings for the foreclosure of the
Mortgaged Property either judicially or non-judicially. Upon receipt of two
copies of a Request for Release stating that such Mortgage Loan was liquidated
and that all amounts received or to be received in connection with such
liquidation which are required to be deposited into the Certificate Account have
been so deposited, or that such Mortgage Loan has become an REO Mortgage Loan,
the Custodian shall amend its records.

            Upon written certification of the Master Servicer or the Servicer
pursuant to clause (ii) of the preceding paragraph, the Trustee shall execute
and deliver to the Master Servicer or such Servicer, as directed by the Master
Servicer, court pleadings, requests for trustee's sale or other documents
necessary to the foreclosure or trustee's sale in respect of a Mortgaged
Property or to any legal action brought to obtain judgment against any Mortgagor
on the Mortgage Note or Mortgage or to obtain a deficiency judgment, or to
enforce any other remedies or rights provided by the Mortgage Note or Mortgage
or otherwise available at law or in equity. Each such certification shall
include a request that such pleadings or documents be executed by the Trustee
and a statement as to the reason such documents or pleadings are required and
that the execution and delivery thereof by the Trustee will not invalidate or
otherwise affect the lien of the Mortgage, except for the termination of such a
lien upon completion of the foreclosure proceeding or trustee's sale.

            Section 3.05 Reports to the Trustee; Annual Compliance Statements.

            (a) Not later than 15 days after each Distribution Date, the Master
Servicer shall deliver to the Trustee a statement setting forth the status of
the Certificate Account as of the close of business on such Distribution Date
stating that all distributions required to be made by the Master Servicer under
this Agreement have been made (or, if any required distribution has not been
made by the Master Servicer, specifying the nature and status thereof) and
showing, for the period covered by such statement, the aggregate amount of
deposits into and withdrawals from such account for each category of deposit and
withdrawal specified in Sections 3.01 and 3.02. Such statement may be in the
form of the then current Fannie Mae monthly accounting report for its Guaranteed
Mortgage Pass-Through Program with appropriate additions and changes, and shall
also include information as to the aggregate unpaid principal balance of all of
the Mortgage Loans as of the close of business as of the last day of the
calendar month immediately preceding such Distribution Date. Copies of such
statement shall be provided by the Trustee to any Certificateholder upon written
request, provided such statement is delivered, or caused to be delivered, by the
Master Servicer to the Trustee.

            (b) The Master Servicer shall deliver to the Trustee on or before
March 30 of each year, a certificate signed by an officer of the Master
Servicer, certifying that (i) such officer has reviewed the activities of the
Master Servicer during the preceding calendar year or portion thereof and its
performance under this agreement, (ii) to the best of such officer's knowledge,
based on such review, the Master Servicer has performed and fulfilled its
duties, responsibilities and obligations under this agreement in all material
respects throughout such year, or, if there has been a default in the
fulfillment of any such duties, responsibilities or obligations, specifying each
such default known to such officer and the nature and status thereof, and (iii)
(A) the Master Servicer has received from each Servicer any financial
statements, officer's certificates, accountant's statements or other information
required to be provided to the Master Servicer pursuant to the related Servicing
Agreement and (B) to the best of such officer's knowledge, based on a review of
the information provided to the Master Servicer by each Servicer as described in
(iii)(A) above, each Servicer has performed and fulfilled its duties,
responsibilities and obligations under the related Servicing Agreement in all
material respects throughout such year, or, if there has been a default in the
fulfillment of any such duties, responsibilities or obligations, specifying each
such default known to such officer and the nature and status thereof. Copies of
such officers' certificate shall be provided by the Trustee to any
Certificateholder upon written request provided such certificate is delivered,
or caused to be delivered, by the Master Servicer to the Trustee.

            Section 3.06 Title, Management and Disposition of Any REO Mortgage
                         Loan.

            The Master Servicer shall enforce the obligations of the applicable
Servicer to administer each REO Mortgage Loan at all times so that each REO
Mortgage Loan qualifies as "foreclosure property" under the REMIC Provisions and
that it does not earn any "net income from foreclosure property" which is
subject to tax under the REMIC Provisions. In the event that a Servicer is
unable to dispose of any REO Mortgage Loan within the period mandated by each of
the Servicing Agreements, the Master Servicer shall monitor such Servicer to
verify that such REO Mortgage Loan is auctioned to the highest bidder within the
period so specified. In the event of any such sale of a REO Mortgage Loan, the
Custodian shall, at the written request of the Master Servicer and upon being
supported with appropriate forms therefor, within five Business Days of the
deposit by the Master Servicer of the proceeds of such sale or auction into the
Certificate Account, release or cause to be released to the entity identified by
the Master Servicer the related Owner Mortgage Loan File, Retained Mortgage Loan
File, if applicable, and Servicer Mortgage Loan File and shall execute and
deliver such instruments of transfer or assignment, in each case without
recourse, as shall be necessary to vest in the auction purchaser title to the
REO Mortgage Loan and the Custodian shall have no further responsibility with
regard to such Owner Mortgage Loan File, Retained Mortgage Loan File, if
applicable, or Servicer Mortgage Loan File. Neither the Trustee, the Master
Servicer nor any Servicer, acting on behalf of the Trust Estate, shall provide
financing from the Trust Estate to any purchaser of an REO Mortgage Loan.

            Section 3.07 Amendments to Servicing Agreements, Modification of
                         Standard Provisions.

            (a) Subject to the prior written consent of the Trustee pursuant to
Section 3.07(b), the Master Servicer from time to time may, to the extent
permitted by the applicable Servicing Agreement, make such modifications and
amendments to such Servicing Agreement as the Master Servicer deems necessary or
appropriate to confirm or carry out more fully the intent and purpose of such
Servicing Agreement and the duties, responsibilities and obligations to be
performed by the Servicer thereunder. Such modifications may only be made if
they are consistent with the REMIC Provisions, as evidenced by an Opinion of
Counsel. Prior to the issuance of any modification or amendment, the Master
Servicer shall deliver to the Trustee such Opinion of Counsel and an Officer's
Certificate setting forth (i) the provision that is to be modified or amended,
(ii) the modification or amendment that the Master Servicer desires to issue and
(iii) the reason or reasons for such proposed amendment or modification.

            (b) The Trustee shall consent to any amendment or supplement to a
Servicing Agreement proposed by the Master Servicer pursuant to Section 3.07(a),
which consent and amendment shall not require the consent of any
Certificateholder if it is (i) for the purpose of curing any mistake or
ambiguity or to further effect or protect the rights of the Certificateholders
or (ii) for any other purpose, provided such amendment or supplement for such
other purpose cannot reasonably be expected to adversely affect
Certificateholders. The lack of reasonable expectation of an adverse effect on
Certificateholders may be established through the delivery to the Trustee of (i)
an Opinion of Counsel to such effect or (ii) written notification from each
Rating Agency to the effect that such amendment or supplement will not result in
reduction of the current rating assigned by that Rating Agency to the
Certificates. Notwithstanding the two immediately preceding sentences, the
Trustee may, in its discretion, decline to enter into or consent to any such
supplement or amendment if its own rights, duties or immunities shall be
adversely affected.

            (c)(i) Notwithstanding anything to the contrary in this Section
3.07, the Master Servicer from time to time may, without the consent of any
Certificateholder or the Trustee, enter into an amendment (A) to an Other
Servicing Agreement for the purpose of (i) eliminating or reducing Month End
Interest and (ii) providing for the remittance of Full Unscheduled Principal
Receipts by the applicable Servicer to the Master Servicer not later than the
24th day of each month (or if such day is not a Business Day, on the previous
Business Day) or (B) to the Wells Fargo Bank Servicing Agreement for the purpose
of changing the applicable Remittance Date to the 18th day of each month (or if
such day is not a Business Day, on the previous Business Day).

            (ii) The Master Servicer may direct Wells Fargo Bank in its capacity
as Servicer to enter into an amendment to the Wells Fargo Bank Servicing
Agreement for the purposes described in Section 3.07(c)(i)(B).

            Section 3.08 Oversight of Servicing.

            The Master Servicer shall supervise, monitor and oversee the
servicing of the Mortgage Loans by each Servicer and the performance by each
Servicer of all services, duties, responsibilities and obligations (including
the obligation to maintain an Errors and Omissions Policy and Fidelity Bond)
that are to be observed or performed by the Servicer under its respective
Servicing Agreement. In performing its obligations hereunder, the Master
Servicer shall act in a manner consistent with Accepted Master Servicing
Practices and in a manner consistent with the terms and provisions of any
insurance policy required to be maintained by the Master Servicer or any
Servicer pursuant to this Agreement or any Servicing Agreement. The Master
Servicer acknowledges that prior to taking certain actions required to service
the Mortgage Loans, each Servicing Agreement provides that the Servicer
thereunder must notify, consult with, obtain the consent of or otherwise follow
the instructions of the Master Servicer. The Master Servicer is also given
authority to waive compliance by a Servicer with certain provisions of its
Servicing Agreement. In each such instance, the Master Servicer shall promptly
instruct such Servicer or otherwise respond to such Servicer's request. In no
event will the Master Servicer instruct such Servicer to take any action, give
any consent to action by such Servicer or waive compliance by such Servicer with
any provision of such Servicer's Servicing Agreement if any resulting action or
failure to act would be inconsistent with the requirements of the Rating
Agencies that rated the Certificates or would otherwise have an adverse effect
on the Certificateholders. Any such action or failure to act shall be deemed to
have an adverse effect on the Certificateholders if such action or failure to
act either results in (i) the downgrading of the rating assigned by either
Rating Agency to the Certificates, (ii) the loss by the Upper-Tier REMIC or the
Lower-Tier REMIC of REMIC status for federal income tax purposes or (iii) the
imposition of any Prohibited Transaction Tax or any federal taxes on any of the
Upper-Tier REMIC, the Lower-Tier REMIC or the Trust Estate. The Master Servicer
shall have full power and authority in its sole discretion to take any action
with respect to the Trust Estate as may be necessary or advisable to avoid the
circumstances specified including clause (ii) or (iii) of the preceding
sentence.

            For the purposes of determining whether any modification of a
Mortgage Loan shall be permitted by the Master Servicer, such modification shall
be construed as a substitution of the modified Mortgage Loan for the Mortgage
Loan originally deposited in the Trust Estate if it would be a "significant
modification" within the meaning of Section 1.860G-2(b) of the regulations of
the U.S. Department of the Treasury. No modification shall be approved unless
(i) the modified Mortgage Loan would qualify as a Substitute Mortgage Loan under
Section 2.02 and (ii) with respect to any modification that occurs more than
three months after the Closing Date and is not the result of a default or a
reasonably foreseeable default under the Mortgage Loan, there is delivered to
the Trustee an Opinion of Counsel (at the expense of the party seeking to modify
the Mortgage Loan) to the effect that such modification would not be treated as
giving rise to a new debt instrument for federal income tax purposes as
described in the preceding sentence; provided, however, that no such Opinion of
Counsel need be delivered if the sole purpose of the modification is to reduce
the Monthly Payment on a Mortgage Loan as a result of a Curtailment such that
the Mortgage Loan is fully amortized by its original maturity date.

            During the term of this Agreement, the Master Servicer shall consult
fully with each Servicer as may be necessary from time to time to perform and
carry out the Master Servicer's obligations hereunder and otherwise exercise
reasonable efforts to cause such Servicer to perform and observe the covenants,
obligations and conditions to be performed or observed by it under its Servicing
Agreement.

            The relationship of the Master Servicer to the Trustee under this
Agreement is intended by the parties to be that of an independent contractor and
not that of a joint venturer, partner or agent.

            The Master Servicer shall administer the Trust Estate on behalf of
the Trustee and shall have full power and authority, acting alone or (subject to
Section 6.06) through one or more subcontractors, to do any and all things in
connection with such administration which it may deem necessary or desirable.
Upon the execution and delivery of this Agreement, and from time to time as may
be required thereafter, the Trustee shall furnish the Master Servicer or its
subcontractors with any powers of attorney and such other documents as may be
necessary or appropriate to enable the Master Servicer to carry out its
administrative duties hereunder.

            The Seller shall have a limited option to repurchase any defaulted
Mortgage Loan or REO Mortgage Loan during the following time periods: (i)
beginning on the first day of the second month following the month in which the
Master Servicer has reported that a Servicer has initiated foreclosure
proceedings with respect to such a defaulted Mortgage Loan, with such repurchase
option expiring on the last day of such second following month; (ii) beginning
on the first day of the second month following the month in which the Master
Servicer has reported that such defaulted Mortgage Loan has become an REO
Mortgage Loan, with such repurchase option expiring on the last day of such
second following month; and (iii) beginning on the day on which a Servicer
accepts a contractual commitment by a third party to purchase the Mortgaged
Property related to the defaulted Mortgage Loan or REO Mortgage Loan, with such
repurchase option expiring on the earlier of the last day of the month in which
such contractual commitment was accepted by the Servicer or the day immediately
prior to the day on which the closing occurs with respect to such third party
purchase of the Mortgaged Property related to the defaulted Mortgage Loan or REO
Mortgage Loan. The Seller shall be entitled to repurchase at its option any
Mortgage Loan in the Trust Estate which, pursuant to paragraph 5(b) of the
Mortgage Loan Purchase Agreement, Wells Fargo Bank requests the Seller to
repurchase and to sell to Wells Fargo Bank to facilitate the exercise of Wells
Fargo Bank's rights against the originator or a prior holder of such Mortgage
Loan. The purchase price for any Mortgage Loan repurchased pursuant to this
paragraph shall be 100% of the unpaid principal balance of such Mortgage Loan
plus accrued interest thereon at the Mortgage Interest Rate for such Mortgage
Loan, through the last day of the month in which such repurchase occurs. Upon
the receipt of such purchase price, the Master Servicer shall provide to the
Trustee the certification required by Section 3.04 and the Trustee and the
Custodian, if any, shall promptly release to the Seller the Owner Mortgage Loan
File and Retained Mortgage Loan File, if applicable, relating to the Mortgage
Loan being repurchased.

            In the event that (i) the Master Servicer determines at any time
that, notwithstanding the representations and warranties set forth in Section
2.03(b), any Mortgage Loan is not a "qualified mortgage" within the meaning of
Section 860G of the Code and (ii) the Trustee is unable to enforce the
obligation of the Seller to purchase such Mortgage Loan pursuant to Section 2.02
within two months of such determination, the Master Servicer shall cause such
Mortgage Loan to be auctioned to the highest bidder and sold out of the Trust
Estate no later than the date 90 days after such determination. In the event of
any such sale of a Mortgage Loan, the Custodian shall, at the written request of
the Master Servicer and upon being supported with appropriate forms therefor,
within five Business Days of the deposit by the Master Servicer of the proceeds
of such auction into the Certificate Account, release or cause to be released to
the entity identified by the Master Servicer the related Owner Mortgage Loan
File, Retained Mortgage Loan File, if applicable, and Servicer Mortgage Loan
File and shall execute and deliver such instruments of transfer or assignment,
in each case without recourse, as shall be necessary to vest in the auction
purchaser title to the Mortgage Loan and the Custodian shall have no further
responsibility with regard to such Owner Mortgage Loan File, Retained Mortgage
Loan File, if applicable, or Servicer Mortgage Loan File. None of the Trustee,
the Custodian, the Master Servicer or any Servicer, acting on behalf of the
Trustee, shall provide financing from the Trust Estate to any purchaser of a
Mortgage Loan.

            The Master Servicer, on behalf of the Trustee, shall, pursuant to
the Servicing Agreements, object to the foreclosure upon, or other related
conversion of the ownership of, any Mortgaged Property by the related Servicer
if (i) the Master Servicer believes such Mortgaged Property may be contaminated
with or affected by hazardous wastes or hazardous substances or (ii) such
Servicer does not agree to administer such Mortgaged Property, once the related
Mortgage Loan becomes an REO Mortgage Loan, in a manner which would not result
in a federal tax being imposed upon the Trust Estate or the Upper-Tier REMIC or
the Lower-Tier REMIC.

            At the direction of the Seller, the Master Servicer may enter into a
special servicing agreement with an unaffiliated holder of 100% Percentage
Interest of a Class of Class B Certificates or a holder of a class of securities
representing interests in the Class B Certificates and/or other subordinated
mortgage pass-through certificates, such agreement to be substantially in the
form of Exhibit M hereto or subject to each Rating Agency's acknowledgment that
the ratings of the Certificates in effect immediately prior to the entering into
of such agreement would not be qualified, downgraded or withdrawn and the
Certificates would not be placed on credit review status (except for possible
upgrading) as a result of such agreement. Any such agreement may contain
provisions whereby such holder may instruct the Master Servicer to instruct a
Servicer to the extent provided in the applicable Servicing Agreement to
commence or delay foreclosure proceedings with respect to delinquent Mortgage
Loans and will contain provisions for the deposit of cash by the holder that
would be available for distribution to Certificateholders if Liquidation
Proceeds are less than they otherwise may have been had the Servicer acted in
accordance with its normal procedures.

            Section 3.09 Termination and Substitution of Servicing Agreements.

            Upon the occurrence of any event for which a Servicer may be
terminated pursuant to its Servicing Agreement, the Master Servicer shall
p  


 
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