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POOLING AND SERVICING AGREEMENT

Pooling and Servicing Agreement

POOLING AND SERVICING AGREEMENT | Document Parties: MASTR ADJUSTABLE RATE MORTGAGES 2005-2 | JPMORGAN CHASE BANK, NA | MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC | UBS REAL ESTATE SECURITIES INC | WELLS FARGO BANK, NA You are currently viewing:
This Pooling and Servicing Agreement involves

MASTR ADJUSTABLE RATE MORTGAGES 2005-2 | JPMORGAN CHASE BANK, NA | MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC | UBS REAL ESTATE SECURITIES INC | WELLS FARGO BANK, NA

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Title: POOLING AND SERVICING AGREEMENT
Governing Law: New York     Date: 3/14/2005

POOLING AND SERVICING AGREEMENT, Parties: mastr adjustable rate mortgages 2005-2 , jpmorgan chase bank  na , mortgage asset securitization transactions  inc , ubs real estate securities inc , wells fargo bank  na
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                                                                       EXHIBIT 4

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                MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC.,
                                     Depositor


                        UBS REAL ESTATE SECURITIES INC.,
                                   Transferor


                             WELLS FARGO BANK, N.A.,
               Master Servicer, Trust Administrator and Custodian


                                        and


                           JPMORGAN CHASE BANK, N.A.,
                                     Trustee


                         -------------------------------

                         POOLING AND SERVICING AGREEMENT
                           Dated as of February 1, 2005

                         -------------------------------




                  MASTR ADJUSTABLE RATE MORTGAGES TRUST 2005-2
                MORTGAGE PASS THROUGH CERTIFICATES, Series 2005-2


================================================================================

<PAGE>


                                TABLE OF CONTENTS



                                    ARTICLE I

                                   DEFINITIONS

Section 1.01   Definitions.................................................
Section 1.02   Certain Calculations........................................


                                   ARTICLE II

                          CONVEYANCE OF MORTGAGE LOANS;
                         REPRESENTATIONS AND WARRANTIES

Section 2.01   Conveyance of Mortgage Loans................................
Section 2.02   Acceptance by Trustee of the Mortgage Loans.................
Section 2.03   Remedies for Breaches of Representations and Warranties.....
Section 2.04   Representations and Warranties of the Depositor as to the
                Mortgage Loans ...........................................
Section 2.05   Execution and Delivery of Certificates......................
Section 2.06   REMIC Matters...............................................
Section 2.07   Covenants of the Master Servicer............................
Section 2.08   Representations and Warranties of the Master Servicer.......
Section 2.09   Representations and Warranties of the Custodian.............


                                   ARTICLE III

                            ADMINISTRATION AND MASTER
                           SERVICING OF MORTGAGE LOANS

Section 3.01   Master Servicing of Mortgage Loans..........................
Section 3.02   Monitoring of Servicers.....................................
Section 3.03   [Reserved]..................................................
Section 3.04   Rights of the Depositor and the Trustee in Respect of the
                Master Servicer...........................................
Section 3.05   Trustee to Act as Master Servicer...........................
Section 3.06   Protected Accounts..........................................
Section 3.07   Collection of Mortgage Loan Payments; Collection Account;
                 Distribution Account......................................
Section 3.08   Collection of Taxes, Assessments and Similar Items; Escrow
                Accounts..................................................
Section 3.09   Access to Certain Documentation and Information Regarding
                the Mortgage Loans........................................
Section 3.10   Permitted Withdrawals from the Collection Account and
                Distribution Account......................................
Section 3.11   Maintenance of Hazard Insurance.............................
Section 3.12   Presentment of Claims and Collection of Proceeds............
Section 3.13   Maintenance of the Primary Insurance Policies...............
Section 3.14   Realization upon Defaulted Mortgage Loans...................
Section 3.15   REO Property................................................
Section 3.16   Due on Sale Clauses; Assumption Agreements..................
Section 3.17   Trustee to Cooperate; Release of Mortgage Files.............
Section 3.18   Documents, Records and Funds in Possession of the Master
                Servicer and the Custodian to Be Held for the Trustee.....
Section 3.19   Master Servicing Compensation...............................
Section 3.20   Access to Certain Documentation.............................
Section 3.21   Annual Statement as to Compliance...........................
Section 3.22   Annual Independent Public Accountants' Servicing Statement;
                Financial Statements......................................
Section 3.23   Errors and Omissions Insurance; Fidelity Bonds..............


                                   ARTICLE IV

                      DISTRIBUTIONS AND SERVICING ADVANCES

Section 4.01   Advances....................................................
Section 4.02   Priorities of Distribution on the Certificates..............
Section 4.03   Allocation of Realized Losses...............................
Section 4.04   Distribution Date Statements to Certificateholders..........


                                     ARTICLE V

                                THE CERTIFICATES

Section 5.01   The Certificates............................................
Section 5.02   Certificate Register; Registration of Transfer and
                Exchange 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.............................


                                   ARTICLE VI

              THE DEPOSITOR, THE CUSTODIAN AND THE MASTER SERVICER

Section 6.01   Respective Liabilities of the Depositor, the Master
                servicer and the Custodian................................
Section 6.02   Merger or Consolidation of the Depositor, the Master
                servicer and the Custodian................................
Section 6.03   Limitation on Liability of the Depositor, the Transferor,
                the Master Servicer, the Custodian and Others.............
Section 6.04   Limitation on Resignation of Master Servicer................
Section 6.05   Sale and Assignment of Master Servicing Rights..............
Section 6.06   Fees of the Custodian.......................................


                                   ARTICLE VII

                                     DEFAULT

Section 7.01   Events of Default...........................................
Section 7.02   Trustee to Act; Appointment of Successor....................
Section 7.03   Notification to Certificateholders..........................


                                  ARTICLE VIII

                 CONCERNING THE TRUSTEE AND THE MASTER SERVICER

Section 8.01   Duties of Trustee...........................................
Section 8.02   Certain Matters Affecting the Trustee.......................
Section 8.03   Trustee Not Liable for Certificates or Mortgage Loans.......
Section 8.04   Trustee May Own Certificates................................
Section 8.05   Trustee's Fees and Expenses.................................
Section 8.06   Eligibility Requirements for Trustee........................
Section 8.07   Resignation and Removal of Trustee..........................
Section 8.08   Successor Trustee...........................................
Section 8.09   Merger or Consolidation of Trustee..........................
Section 8.10   Appointment of Co-Trustee or Separate Trustee...............
Section 8.11   Tax Matters.................................................
Section 8.12   Periodic Filings............................................


                                   ARTICLE IX

                       CONCERNING THE TRUST ADMINISTRATOR

Section 9.01   Duties of Trust Administrator...............................
Section 9.02   Certain Matters Affecting the Trust Administrator...........
Section 9.03   Trust Administrator Not Liable for Certificates or Mortgage
                Loans.....................................................
Section 9.04   Trust Administrator May Own Certificates....................
Section 9.05   Trust Administrator's Fees and Expenses.....................
Section 9.06   Eligibility Requirements for Trust Administrator............
Section 9.07   Resignation and Removal of Trust Administrator..............
Section 9.08   Successor Trust Administrator...............................
Section 9.09   Merger or Consolidation of Trust Administrator..............


                                     ARTICLE X

                                   TERMINATION

Section 10.01 Termination upon Liquidation or Purchase of All Mortgage
                Loans.....................................................
Section 10.02 Final Distribution on the Certificates......................
Section 10.03 Additional Termination Requirements.........................


                                   ARTICLE XI

                            MISCELLANEOUS PROVISIONS

Section 11.01 Amendment...................................................
Section 11.02 Recordation of Agreement; Counterparts......................
Section 11.03 Governing Law...............................................
Section 11.04 Intention of Parties........................................
Section 11.05 Notices.....................................................
Section 11.06 Severability of Provisions..................................
Section 11.07 Assignment..................................................
Section 11.08 Limitation on Rights of Certificateholders..................
Section 11.09 Inspection and Audit Rights.................................
Section 11.10 Certificates Nonassessable and Fully Paid...................

SCHEDULES

Schedule I        Mortgage Loan Schedule...................................
Schedule II       Representations and Warranties as to the Mortgage Loans..
Schedule III      Class P Prepayment Charges Mortgage Loan Schedule........

EXHIBITS

Exhibit A-1-A-1   Form of Class 1-A-1 Certificate..........................
Exhibit A-2-A-1   Form of Class 2-A-1 Certificate..........................
Exhibit A-3-A-1   Form of Class 3-A-1 Certificate..........................
Exhibit A-4-A-1   Form of Class 4-A-1 Certificate..........................
Exhibit A-5-A-1   Form of Class 5-A-1 Certificate..........................
Exhibit A-6-A-1   Form of Class 6 A-1 Certificate..........................
Exhibit A-7-A-1   Form of Class 7-A-1 Certificate..........................
Exhibit A-7-A-2   Form of Class 7-A-2 Certificate..........................
Exhibit A-7-A-X   Form of Class 7-A-X Certificate..........................
Exhibit A-R       Form of Class A-LR or A-UR Certificate...................
Exhibit B         Form of Class B-1, B-2 or B-3 Certificate................
Exhibit C         Form of Class B-4, B-5 or B-6 Certificate................
Exhibit D         Form of Class P Certificate..............................
Exhibit E         Form of Reverse of Certificates..........................
Exhibit F         Form of Initial Certification of Custodian...............
Exhibit G         Form of Final Certification of Custodian.................
Exhibit H         Form of Transfer Affidavit...............................
Exhibit I         Form of Transferor Certificate...........................
Exhibit J         Form of Investment Letter (Non Rule 144A)................
Exhibit K         Form of Rule 144A Letter.................................
Exhibit L         Form of Request for Release of Documents.................
Exhibit M         Form of Certification to be Provided with Form 10-K......

<PAGE>

            THIS POOLING AND SERVICING AGREEMENT, dated as of February 1, 2005,
among MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC., a Delaware corporation,
as depositor (the "Depositor"), UBS REAL ESTATE SECURITIES INC., a Delaware
corporation, as transferor (the "Transferor"), WELLS FARGO BANK, N.A., a
national banking association, as master servicer (in such capacity, the "Master
Servicer"), as trust administrator (in such capacity, the "Trust Administrator")
and as custodian (in such capacity, the "Custodian"), and JPMORGAN CHASE BANK,
N.A., a banking association organized under the laws of the United States, as
trustee (the "Trustee").

                                 WITNESSETH THAT

             In consideration of the mutual agreements herein contained, the
parties hereto agree as follows:

                              PRELIMINARY STATEMENT

            The Depositor is the owner of the Trust Fund that is hereby conveyed
to the Trustee in return for the Certificates. The Trust Fund is being conveyed
to the Trustee to create a trust for the benefit of the Certificateholders. The
Trust Fund for federal income tax purposes will consist of three REMICs. The
Lower-Tier REMIC will consist of all of the assets constituting the Trust Fund
(other than any Class P Prepayment Charges, the Lower-Tier REMIC Regular
Interests, Middle-Tier REMIC Regular Interests and proceeds thereof in the
Distribution Account) and will be evidenced by the Lower-Tier REMIC Regular
Interests (which will be uncertificated and will represent the "regular
interests" in the Lower-Tier REMIC) and the Class A-LR Certificates as the
single "residual interest" in the Lower-Tier REMIC. The Trustee will hold the
Lower-Tier REMIC Regular Interests. The Middle-Tier REMIC will consist of the
Lower-Tier REMIC Regular Interests and all proceeds thereof in the Distribution
Account and will be evidenced by the Middle-Tier REMIC Regular Interests (which
will be uncertificated and will represent the "regular interests" in the
Middle-Tier REMIC) and the Class A-MR Interest as the single "residual interest"
in the Middle-Tier REMIC. The Trustee shall hold the Middle-Tier REMIC Regular
Interests. The Upper-Tier REMIC will consist of the Middle-Tier REMIC Regular
Interests and all proceeds thereof in the Distribution Account and will be
evidenced by the Regular Certificates (which will represent the "regular
interests" in the Upper-Tier REMIC) and the Class A-UR Interest as the single
"residual interest" of the Upper-Tier REMIC. The "latest possible maturity date"
for federal income tax purposes of all interests created hereby will be the
Latest Possible Maturity Date. The Class A-UR Certificates will represent the
Class A-MR Interest and the Class A-UR Interest. In addition, the Class P
Certificates represent beneficial ownership of the Class P Prepayment Charges,
which portion of the Trust Fund shall be treated as a grantor trust under
subpart E, Part I of subchapter J of the Code.

             The following table sets forth characteristics of the Certificates,
together with the minimum denominations and integral multiples in excess thereof
in which such Classes shall be issuable (except that one Certificate of each
Class of Certificates may be issued in a different amount):

                                                                     Integral
                      Initial Class                                  Multiples
                    Principal Balance    Pass-Through      Minimum     in Excess
                    or Notional Amount       Rate       Denomination   of Minimum
                    ------------------   ------------   ------------   ----------
Class 1-A-1             $ 35,530,000            (1)         $   25,000         $1
Class 2-A-1             $ 48,926,000            (3)         $   25,000         $1
Class 3-A-1             $178,299,000            (4)         $   25,000         $1
Class 4-A-1             $ 93,235,000            (5)         $   25,000         $1
Class 5-A-1             $128,960,000            (6)         $   25,000         $1
Class 6-A-1             $ 45,845,000            (7)         $   25,000         $1
Class 7-A-1             $ 95,361,000            (8)         $   25,000         $1
Class 7-A-2             $   7,057,000            (9)         $   25,000         $1
Class 7-A-X             $ 95,361,000(10)       (11)         $ 100,000         $1
Class A-LR              $          50            (2)         $       50        N/A
Class A-UR(12)          $          50            (2)         $       50        N/A
Class B-1               $ 22,566,000           (13)         $   25,000         $1
Class B-2               $   7,180,000           (13)         $   25,000         $1
Class B-3               $   7,522,000           (13)         $   25,000         $1
Class B-4               $   5,812,000           (13)         $   25,000         $1
Class B-5               $   4,445,000           (13)         $   25,000         $1
Class B-6               $   3,077,567           (13)         $   25,000         $1
Class P                          (14)          N/A              N/A(15)    N/A(15)
----------
(1)    The Pass-Through Rate for the Class 1-A-1 Certificates for each
      Distribution Date will be a per annum rate equal to the weighted average
      of the Net Mortgage Rates on the Group 1 Mortgage Loans, weighted on the
      basis of the respective Scheduled Principal Balances, as of the first day
      of the related Interest Accrual Period (after taking into account
      scheduled payments of principal on that date).

(2)    The Pass-Through Rate for the Class A-LR and Class A-UR Certificates for
      each Distribution Date will be a per annum rate equal to the weighted
      average of the Net Mortgage Rates on the Group 1 Mortgage Loans, weighted
      on the basis of the respective Scheduled Principal Balances, as of the
      first day of the related Interest Accrual Period (after taking into
      account scheduled payments of principal on that date).

(3)    The Pass-Through Rate for the Class 2-A-1 Certificates for each
      Distribution Date will be a per annum rate equal to the weighted average
      of the Net Mortgage Rates on the Group 2 Mortgage Loans, weighted on the
      basis of the respective Scheduled Principal Balances, as of the first day
      of the related Interest Accrual Period (after taking into account
      scheduled payments of principal on that date).

(4)    The Pass-Through Rate for the Class 3-A-1 Certificates for each
      Distribution Date will be a per annum rate equal to the weighted average
      of the Net Mortgage Rates on the Group 3 Mortgage Loans, weighted on the
      basis of the respective Scheduled Principal Balances, as of the first day
      of the related Interest Accrual Period (after taking into account
      scheduled payments of principal on that date).

(5)    The Pass-Through Rate for the Class 4-A-1 Certificates for each
      Distribution Date will be a per annum rate equal to the weighted average
      of the Net Mortgage Rates on the Group 4 Mortgage Loans, weighted on the
      basis of the respective Scheduled Principal Balances, as of the first day
      of the related Interest Accrual Period (after taking into account
      scheduled payments of principal on that date).

(6)    The Pass-Through Rate for the Class 5-A-1 Certificates for each
      Distribution Date will be a per annum rate equal to the weighted average
      of the Net Mortgage Rates on the Group 5 Mortgage Loans, weighted on the
      basis of the respective Scheduled Principal Balances, as of the first day
      of the related Interest Accrual Period (after taking into account
      scheduled payments of principal on that date).

(7)    The Pass-Through Rate for the Class 6-A-1 Certificates for each
      Distribution Date will be a per annum rate equal to the weighted average
      of the Net Mortgage Rates on the Group 6 Mortgage Loans, weighted on the
      basis of the respective Scheduled Principal Balances, as of the first day
      of the related Interest Accrual Period (after taking into account
      scheduled payments of principal on that date).

(8)    The Pass-Through Rate for the Class 7-A-1 Certificates for each
      Distribution Date will be a per annum rate equal to the weighted average
      of the Net Mortgage Rates on the Group 7 Mortgage Loans, weighted on the
      basis of the respective Scheduled Principal Balances, as of the first day
      of the related Interest Accrual Period (after taking into account
      scheduled payments of principal on that date) minus 0.1679%.

(9)    The Pass-Through Rate for the Class 7-A-2 Certificates for each
      Distribution Date will be a per annum rate equal to the weighted average
      of the Net Mortgage Rates on the Group 7 Mortgage Loans, weighted on the
      basis of the respective Scheduled Principal Balances, as of the first day
       of the related Interest Accrual Period (after taking into account
      scheduled payments of principal on that date).

(10)   The Class 7-A-X Certificates are Interest-Only Certificates and will not
      be entitled to distributions in respect of principal and will bear
      interest on their respective Notional Amount.

(11)   The Pass-Through Rate for the Class 7-A-X Certificates for each
      Distribution Date will be a per annum rate equal to 0.1679%.

(12)   The Class A-UR Certificates will represent the Class A-UR Interest and the
      Class A-MR Interest.

(13)   The Pass-Through Rate for the Class B-1, Class B-2, Class B-3, Class B-4,
      Class B-5 and Class B-6 Certificates for each Distribution Date will be a
      per annum rate equal to the weighted average (weighted on the basis of the
      portion of the aggregate Class Principal Balance of the Subordinate
      Certificates attributable to each Loan Group as of the first day of the
      related Interest Accrual Period (after taking into account scheduled
      payments of principal on that date)) of the weighted average of the Net
      Mortgage Rates on the Mortgage Loans in each Loan Group, weighted on the
      basis of the respective Scheduled Principal Balances, as of the first day
      of the related Interest Accrual Period (after taking into account
      scheduled payments of principal on that date).

(14)   The Class P Certificates shall not have an aggregate principal balance and
      shall not be entitled to distributions in respect of principal or
      interest. The Class P certificates shall be entitled to Class P Prepayment
      Charges collected.

(15)   The Class P Certificates shall be issued in a minimum percentage interest
      of 1% and multiple integrals of 1% in excess thereof.

            Set forth below are designations of Classes of Certificates to the
categories used herein:

Book-Entry Certificates...........     All Classes of Offered Certificates other
                                      than the Physical Certificates.
ERISA Restricted Certificates.....     The Residual Certificates and the Private
                                      Certificates.
Group 1 Certificates..............     The Class 1-A-1, Class A-LR and
                                      Class A-UR Certificates.
Group 2 Certificates..............     The Class 2-A-1 Certificates.
Group 3 Certificates..............     The Class 3-A-1 Certificates.
Group 4 Certificates..............     The Class 4-A-1 Certificates.
Group 5 Certificates..............     The Class 5-A-1 Certificates.
Group 6 Certificates..............     The Class 6-A-1 Certificates.
Group 7 Certificates..............     The Class 7-A-1, Class 7-A-2 and Class
                                      7-A-X Certificates.
Interest-Only Certificates........     The Class 7-A-X Certificates
Offered Certificates..............     All Classes of Certificates other than
                                      the Private Certificates.
Physical Certificates.............     The Private Certificates and the Residual
                                      Certificates.
Private Certificates..............     The Class B-4, Class B-5, Class B-6 and
                                      Class P Certificates.
Rating Agencies...................     S&P, Moody's and DBRS.
Regular Certificates..............     All Classes of Certificates, other than
                                      the Residual Certificates and the Class P
                                      Certificates.
Residual Certificates.............     The Class A-LR and Class A-UR
                                      Certificates.
Senior Certificates...............     The Group 1 Certificates, Group 2
                                      Certificates, Group 3 Certificates,
                                       Group 4 Certificates, Group 5
                                      Certificates, Group 6 Certificates and
                                      Group 7 Certificates.
Subordinate Certificates..........     The Class B-1, Class B-2, Class B-3,
                                      Class B-4, Class B-5 and Class B-6
                                      Certificates.

            Defined terms and provisions herein relating to statistical rating
agencies not designated above as Rating Agencies shall be of no force or effect.

                                    ARTICLE I

                                   DEFINITIONS

            Section 1.01 Definitions. Whenever used in this Agreement, the
following words and phrases, unless the context otherwise requires, shall have
the following meanings:

            Accrued Certificate Interest: With respect to any Distribution Date
and any interest bearing Class of Certificates, the sum of (i) one month's
interest accrued during the related Interest Accrual Period at the Pass-Through
Rate for such Class on the related Class Principal Balance or Notional Amount,
subject to reduction as provided in Section 4.02(c) and (ii) any Class Unpaid
Interest Amounts for such Class.

            Adjustment Amount: With respect to the Special Hazard Loss Coverage
Amount and, with respect to each anniversary of February 1, 2005, the amount, if
any, by which the Special Hazard Loss Coverage Amount (without giving effect to
the deduction of the Adjustment Amount for such anniversary) exceeds the
greatest of (x) the product of 1% and the outstanding principal balance of all
the related Mortgage Loans on the Distribution Date immediately preceding such
anniversary, (y) the outstanding principal balance of related Mortgage Loans
secured by Mortgaged Properties in the highest California zip code concentration
on the Distribution Date immediately preceding such anniversary and (z) twice
the outstanding principal balance of the related Mortgage Loan which has the
largest outstanding principal balance on the Distribution Date immediately
preceding such anniversary.

            Adjustment Date: As to each Mortgage Loan, the date on which the
Mortgage Rate is adjusted in accordance with the terms of the related Mortgage
Note and Mortgage.

            Advance: An advance of principal or interest required to be made by
the applicable Servicer pursuant to the related Servicing Agreement or required
to be made by the Master Servicer with respect to any Distribution Date pursuant
to Section 4.01.

            Affiliate: When used with reference to a specified Person, another
Person that (i) directly or indirectly controls or is controlled by or is under
common control with the specified Person, (ii) is an officer of, partner in or
trustee of, or serves in a similar capacity with respect to, the specified
Person or of which the specified Person is an officer, partner or trustee, or
with respect to which the specified Person serves in a similar capacity or (iii)
directly or indirectly is the beneficial owner of 10% or more of any class of
equity securities of the specified Person or of which the specified Person is
directly or indirectly the owner of 10% or more of any class of equity
securities.

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

            Aggregate Subordinate Optimal Principal Amount: For any Distribution
Date, the sum of the Subordinate Optimal Principal Amounts for all of the Loan
Groups.

            Aggregate Subordinate Percentage: As of any Distribution Date, the
aggregate Class Principal Balance for the Subordinate Certificates immediately
prior to such Distribution Date divided by the sum of the Group Pool Principal
Balance for all of the Loan Groups.

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

             Alternate Cut-Off Date Mortgage Loans: The Mortgage Loans that are
listed as "Alternate Cut-Off Date Mortgage Loans" on the Mortgage Loan Schedule.

            Allocable Share: For any Distribution Date and each Class of
Subordinate Certificates, the portion of the Aggregate Subordinate Optimal
Principal Amount allocable to such Class, equal to the product of the Aggregate
Subordinate Optimal Principal Amount on such Distribution Date and a fraction,
the numerator of which is the related Class Principal Balance thereof and the
denominator of which is the aggregate of the Class Principal Balances of the
Subordinate Certificates; provided, that no class of such Subordinate
Certificates will be entitled on any Distribution Date to receive distributions
pursuant to clauses (ii), (iii) and (iv) of the definition of Subordinate
Optimal Principal Amount unless the Class Prepayment Distribution Trigger for
that class is satisfied for that Distribution Date; if the Class Prepayment
Distribution Trigger is not satisfied for an outstanding class of such
Subordinate Certificates, those amounts will be distributable to the remaining
classes of such Subordinate Certificates for which the Class Prepayment
Distribution Trigger is satisfied, pro rata, according to Certificate Principal
Balance.

            Amount Available for Group 1 Principal: As to any Distribution Date,
Group 1 Available Funds for such Distribution Date reduced by the aggregate
amount distributable on such Distribution Date in respect of interest on the
Group 1 Certificates pursuant to Section 4.02(a)(i) priority first sub-clause
(a).

            Amount Available for Group 2 Principal: As to any Distribution Date,
Group 2 Available Funds for such Distribution Date reduced by the aggregate
amount distributable on such Distribution Date in respect of interest on the
Group 2 Certificates pursuant to Section 4.02(a)(i) priority first sub-clause
(b).

            Amount Available for Group 3 Principal: As to any Distribution Date,
Group 3 Available Funds for such Distribution Date reduced by the aggregate
amount distributable on such Distribution Date in respect of interest on the
Group 3 Certificates pursuant to Section 4.02(a)(i) priority first sub-clause
(c).

            Amount Available for Group 4 Principal: As to any Distribution Date,
Group 4 Available Funds for such Distribution Date reduced by the aggregate
amount distributable on such Distribution Date in respect of interest on the
Group 4 Certificates pursuant to Section 4.02(a)(i) priority first sub-clause
(d).

            Amount Available for Group 5 Principal: As to any Distribution Date,
Group 5 Available Funds for such Distribution Date reduced by the aggregate
amount distributable on such Distribution Date in respect of interest on the
Group 5 Certificates pursuant to Section 4.02(a)(i) priority first sub-clause
(e).

            Amount Available for Group 6 Principal: As to any Distribution Date,
Group 6 Available Funds for such Distribution Date reduced by the aggregate
amount distributable on such Distribution Date in respect of interest on the
Group 6 Certificates pursuant to Section 4.02(a)(i) priority first sub-clause
(f).

            Amount Available for Group 7 Principal: As to any Distribution Date,
Group 7 Available Funds for such Distribution Date reduced by the aggregate
amount distributable on such Distribution Date in respect of interest on the
Group 7 Certificates pursuant to Section 4.02(a)(i) priority first sub-clause
(g).

            Amount Held for Future Distribution: As to any Distribution Date and
any Mortgage Loan or Loan Group, the aggregate amount held in the Collection
Account at the close of business on the related Servicer Remittance Date with
respect to such Mortgage Loan or Loan Group at the close of business on the
related Servicer Remittance Date on account of (i) Principal Prepayments
received after the related Prepayment Period, and Liquidation Proceeds and
Insurance Proceeds received in the month of such Distribution Date and (ii) all
Scheduled Payments due after the related Due Date.

            Apportioned Subordinate Principal Distribution Amount: With respect
to a Class of Subordinate Certificates and any Distribution Date, the product of
(i) the Subordinate Principal Distribution Amount and (ii) the applicable
Apportionment Fraction.

            Apportionment Fraction: With respect to each Class of Subordinate
Certificates and for any Distribution Date, in the event that the Class
Principal Balances of the Senior Certificates of any Certificate Group have been
reduced to zero, a fraction the numerator of which is equal to the sum of the
Subordinate Optimal Principal Amount of the Loan Group (or Groups) related to
such Certificate Group (or Groups), and the denominator of which is equal to the
Aggregate Subordinate Optimal Principal Amount.

            Appraised Value: With respect to any Mortgage Loan, the Appraised
Value of the related Mortgaged Property shall be: (i) with respect to a Mortgage
Loan other than a Refinancing Mortgage Loan, the lesser of (a) the value of the
Mortgaged Property based upon the appraisal made at the time of the origination
of such Mortgage Loan and (b) the sales price of the Mortgaged Property at the
time of the origination of such Mortgage Loan; and (ii) with respect to a
Refinancing Mortgage Loan, the value of the Mortgaged Property based upon the
appraisal made at the time of the origination of such Refinancing Mortgage Loan
as modified by an updated appraisal.

            Assignment: An individual assignment of a Mortgage, notice of
transfer or equivalent instrument in recordable form, sufficient under the laws
of the jurisdiction wherein the related Mortgaged Property is located to reflect
of record the sale or transfer of the Mortgage Loan.

            Assignment Agreements: The following Assignment, Assumption and
Recognition Agreements, each dated as of February 25, 2005, whereby certain
Servicing Agreements solely with respect to the related Mortgage Loans were
assigned to the Depositor for the benefit of the Certificateholders:

            (a) The Assignment, Assumption and Recognition Agreement, among
      Countrywide, the Transferor and Mortgage Asset Securitization
      Transactions, Inc.;

            (b) The Assignment, Assumption and Recognition Agreement, among
      GMAC, the Transferor and Mortgage Asset Securitization Transactions, Inc.;

            (c) The Assignment, Assumption and Recognition Agreement, among
      GreenPoint, the Transferor and Mortgage Asset Securitization Transactions,
      Inc.;

             (d) The Assignment, Assumption and Recognition Agreement, among
      National City, the Transferor and Mortgage Asset Securitization
      Transactions, Inc.;

            (e) The Assignment, Assumption and Recognition Agreement, among PHH,
       the Transferor and Mortgage Asset Securitization Transactions, Inc.;

            (f) The Assignment, Assumption and Recognition Agreement, among
      Provident, the Transferor and Mortgage Asset Securitization Transactions,
      Inc.;

            (g) The Assignment, Assumption and Recognition Agreement, among
      Nexstar, the Transferor and Mortgage Asset Securitization Transactions,
      Inc.;

            (h) The Assignment, Assumption and Recognition Agreement, among
      Wachovia Mortgage, the Transferor and Mortgage Asset Securitization
      Transactions, Inc.; and

            (i) The Assignment, Assumption and Recognition Agreement, among
      Wells Fargo, the Transferor and Mortgage Asset Securitization
      Transactions, Inc.

             Assignment of Proprietary Lease: With respect to a Cooperative Loan,
the assignment or mortgage of the related Proprietary Lease from the Mortgagor
to the originator of the Cooperative Loan.

            Available Funds: With respect to any Certificate Group, the Group 1
Available Funds, the Group 2 Available Funds, the Group 3 Available Funds, the
Group 4 Available Funds, the Group 5 Available Funds, the Group 6 Available
Funds and the Group 7 Available Funds, as the case may be.

            Bankruptcy Code: The United States Bankruptcy Reform Act of 1978, as
amended.

            Bankruptcy Coverage Termination Date: With respect to any Loan
Group, the point in time at which the Bankruptcy Loss Coverage Amount is reduced
to zero.

            Bankruptcy Loss: With respect to any Mortgage Loan, a Deficient
Valuation or Debt Service Reduction as reported by the applicable Servicer to
the Master Servicer; provided, however, that a Bankruptcy Loss shall not be
deemed a Bankruptcy Loss hereunder so long as the Master Servicer has notified
the Trustee in writing that either the Master Servicer or the applicable
Servicer is diligently pursuing any remedies that may exist in connection with
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 related escrow
payments in respect of such Mortgage Loan are being advanced on a current basis
by either the Master Servicer or the applicable Servicer, in either case without
giving effect to any Debt Service Reduction or Deficient Valuation.

            Bankruptcy Loss Coverage Amount: As of any Distribution Date, the
Bankruptcy Loss Coverage Amount shall equal the Initial Bankruptcy Coverage
Amount as reduced by (i) the aggregate amount of Bankruptcy Losses relating to
the Mortgage Loans since February 1, 2005 and (ii) any permissible reductions in
such Bankruptcy Loss Coverage Amount as evidenced by a letter of each Rating
Agency to the Trust Administrator and the Trustee to the effect that any such
reduction or modification will not adversely affect the then current ratings
assigned to the Senior Certificates rated by it.

            Book-Entry Certificates: As specified in the Preliminary Statement.

            Business Day: Any day other than (i) a Saturday or a Sunday, or (ii)
a day on which banking institutions in the City of New York, New York,
Minnesota, Maryland, or any city in which the Corporate Trust Office of the
Trustee or Trust Administrator is located are authorized or obligated by law or
executive order to be closed.

            Certificate: Any one of the Certificates executed by the Trust
Administrator on behalf of the Trust and authenticated by the Trust
Administrator in substantially the forms attached hereto as Exhibits A through
E.

            Certificate Group: The Group 1 Certificates, Group 2 Certificates,
Group 3 Certificates, Group 4 Certificates, Group 5 Certificates, Group 6
Certificates and Group 7 Certificates, as applicable.

            Certificate Owner: With respect to a Book-Entry Certificate, the
Person who is the beneficial owner of such Book-Entry Certificate.

            Certificate Principal Balance: With respect to any Certificates
(other than the Class P Certificates or the Interest-Only Certificates) at any
date, the maximum dollar amount of principal to which the Holder thereof is then
entitled hereunder, such amount being equal to the Denomination thereof minus
the sum of (i) all distributions of principal previously made with respect
thereto and (ii) all Realized Losses allocated thereto and, in the case of any
Subordinate Certificates, all other reductions in Certificate Principal Balance
previously allocated thereto pursuant to Section 4.03; provided, however, that
pursuant to Section 4.03(d), the Class Principal Balance of a Class of
Certificates may be increased up to the amount of Realized Losses previously
allocated to such Class, in the event that there is a Recovery on a related
Mortgage Loan, and the Certificate Principal Balance of any individual
Certificate of such Class will be increased by its pro rata share of the
increase to such Class. The Class P Certificates and the Interest-Only
Certificates have no Certificate Principal Balance.

            Certificate Register: The register maintained pursuant to Section
5.02 hereof.

            Certificateholder or Holder: The person in whose name a Certificate
is registered in the Certificate Register, except that, solely for the purpose
of giving any consent pursuant to this Agreement, any Certificate registered in
the name of the Master Servicer or the Depositor or any affiliate of the Master
Servicer or the Depositor, as applicable, shall be deemed not to be Outstanding
and the Percentage Interest evidenced thereby shall not be taken into account in
determining whether the requisite amount of Percentage Interests necessary to
effect such consent has been obtained; provided, however, that, if any such
Person (including the Master Servicer or the Depositor) owns 100% of the
Percentage Interests evidenced by a Class of Certificates, such Certificates
shall be deemed to be Outstanding for purposes of any provision hereof that
requires the consent of the Holders of Certificates of a particular Class as a
condition to the taking of any action hereunder. The Trust Administrator is
entitled to rely conclusively on a certification of the Master Servicer or the
Depositor or any affiliate of the Master Servicer or the Depositor, as
applicable, in determining which Certificates are registered in the name of an
affiliate of the Master Servicer or the Depositor.

            Certification: As specified in Section 8.12(d).

            Class: All Certificates bearing the same class designation as set
forth in the Preliminary Statement.

            Class A-LR Interest: The sole class of "residual interest" in the
Lower-Tier REMIC.

            Class A-MR Interest: The sole class of "residual interest" in the
Middle-Tier REMIC.

             Class A-UR Interest: The sole class of "residual interest" in the
Upper-Tier REMIC.

            Class Interest Shortfall: As to any Distribution Date and any
interest-bearing Class of Certificates, the amount by which the amount described
in clause (i) of the definition of Accrued Certificate Interest for such Class
exceeds the amount of interest actually distributed on such Class on such
Distribution Date pursuant to such clause (i).

            Class P Certificates: All Certificates bearing the class designation
of "Class P".

            Class P Prepayment Charges: Any prepayment premium, penalty or
charge to which the Trust is entitled with respect to Mortgage Loans identified
on Schedule III attached hereto.

            Class Prepayment Distribution Trigger: This trigger is satisfied
with respect to any Class of Subordinate Certificates and any Distribution Date,
if either (i) the Fractional Interest for such Class with respect to such
Distribution Date, equals or exceeds the Fractional Interest for such Class
calculated as of the Closing Date or (ii) such Class of Subordinate Certificates
is the most senior Class of Subordinate Certificates then outstanding.

            Class Principal Balance: With respect to any Class of Certificates
(other than the Class P Certificates and the Interest-Only Certificates) and as
to any date of determination, the aggregate of the Certificate Principal
Balances of all Certificates of such Class as of such date.

            Class Unpaid Interest Amounts: As to any Distribution Date and any
interest bearing Class of Certificates, the amount by which the aggregate Class
Interest Shortfalls for such Class on prior Distribution Dates exceeds the
amount distributed on such Class on prior Distribution Dates pursuant to clause
(ii) of the definition of Accrued Certificate Interest for such Class.

            Clean-up Call Mortgage Loan Price: With respect to each Mortgage
Loan (not including REO Properties) to be purchased pursuant to Section
10.01(a), the greater of (x) the Par Call Price for such Mortgage Loan and (y)
the Fair Market Value Call Price for such Mortgage Loan.

            Clean-up Call REO Property Price: With respect to each REO Property
to be purchased pursuant to Section 10.01(a), the lesser of (x) the appraised
value of such REO Property as determined by the higher of two appraisals
completed by two independent appraisers selected by the Master Servicer at the
expense of the Master Servicer and (y) the unpaid principal balance of each
Mortgage Loan related to such REO Property plus accrued and unpaid interest
thereon at the applicable Net Mortgage Rate.

            Closing Date: February 25, 2005.

            Code: The Internal Revenue Code of 1986, including any successor or
amendatory provisions.

            Collection Account: The separate Eligible Account or Accounts
created and maintained by the Master Servicer pursuant to Section 3.07 with a
depository institution in the name of the Master Servicer for the benefit of the
Trustee on behalf of Certificateholders and designated "Wells Fargo Bank, N.A.,
in trust for registered holders of MASTR Adjustable Rate Mortgages Trust 2005-2
Mortgage Pass-Through Certificates, Series 2005-2." The Collection Account may
be deemed to be a sub-account of the Distribution Account.

            Compensating Interest: With respect to any Distribution Date and any
Servicer, the amount required to be paid by such Servicer under the related
Servicing Agreement in connection with Prepayment Interest Shortfalls that occur
on Mortgage Loans serviced by such Servicer for the related Distribution Date.
If any Servicer fails to make its required Compensating Interest payment on any
Distribution Date, the Master Servicer will be required to make such
Compensating Interest payment to the same extent that such Servicer is required
to make such Compensating Interest payment.

            Control Person: As defined in Section 8.05.

            Cooperative Corporation: With respect to any Cooperative Loan, the
cooperative apartment corporation that holds legal title to the related
Cooperative Property and grants occupancy rights to units therein to
stockholders through Proprietary Leases or similar arrangements.

            Cooperative Lien Search: A search for (a) federal tax liens,
mechanics' liens, lis pendens, judgments of record or otherwise against (i) the
Cooperative Corporation and (ii) the seller of the Cooperative Unit, (b) filings
of Financing Statements and (c) the deed of the Cooperative Property into the
Cooperative Corporation.

            Cooperative Loan: A Mortgage Loan that is secured by a first lien on
and a perfected security interest in Cooperative Shares and the related
Proprietary Lease granting exclusive rights to occupy the related Cooperative
Unit in the building owned by the related Cooperative Corporation.

            Cooperative Property: With respect to any Cooperative Loan, all real
property and improvements thereto and rights therein and thereto owned by a
Cooperative Corporation including without limitation the land, separate dwelling
units and all common elements.

            Cooperative Shares: With respect to any Cooperative Loan, the shares
of stock issued by a Cooperative Corporation and allocated to a Cooperative Unit
and represented by stock certificates.

            Cooperative Unit: With respect to any Cooperative Loan, a specific
unit in a Cooperative Property.

            Corporate Trust Office: With respect to the Trustee, the designated
office of the Trustee at which at any particular time its corporate trust
business with respect to this Agreement shall be administered, which office at
the date of the execution of this Agreement is located at 4 New York Plaza, 6th
Floor, New York, New York 10004 2477, Attention: Institutional Trust
Services/Global Debt MASTR Adjustable Rate Mortgages Trust 2005-2, telephone no.
(212) 623 5600, facsimile no. (212) 623 5930, which is the address to which
appropriate notices to and correspondence with the Trustee should be directed.
With respect to the Trust Administrator, the designated office of the Trust
Administrator at which at any particular time its corporate trust business with
respect to this Agreement shall be administered, which office at the date of
execution of this Agreement is located for certificate transfer purposes at
Sixth Street and Marquette Avenue, Minneapolis, Minnesota 55479, Attention:
Corporate Trust Services - MARM 2005-2, and for all other purposes at 9062 Old
Annapolis Road, Columbia, Maryland 21045, Attention: Corporate Trust Services -
MARM 2005-2.

            Corresponding Class or Classes of Certificates and Corresponding
Middle-Tier REMIC Regular Interests: With respect to each Middle-Tier REMIC
Regular Interest and each Class or Classes of Certificates appearing opposite
each other as follows:

   Corresponding Middle-Tier                     Corresponding Class or
     REMIC Regular Interest                     Classes of Certificates
---------------------------------       -----------------------------------------
     Class 1-A-M1 Interest                      Class 1-A-1 Certificates
     Class 2-A-M1 Interest                      Class 2-A-1 Certificates
     Class 3-A-M1 Interest                      Class 3-A-1 Certificates
     Class 4-A-M1 Interest                      Class 4-A-1 Certificates
     Class 5-A-M1 Interest                      Class 5-A-1 Certificates
     Class 6-A-M1 Interest                      Class 6-A-1 Certificates
     Class 7-A-M1 Interest              Class 7-A-1 and Class 7-A-X Certificates
     Class 7-A-M2 Interest                      Class 7-A-2 Certificates
      Class B-M1 Interest                        Class B-1 Certificates
      Class B-M2 Interest                        Class B-2 Certificates
      Class B-M3 Interest                        Class B-3 Certificates
      Class B-M4 Interest                        Class B-4 Certificates
      Class B-M5 Interest                        Class B-5 Certificates
      Class B-M6 Interest                        Class B-6 Certificates

            Countrywide: Countrywide Home Loans Servicing LP and its successors
and assigns, in its capacity as Servicer of the Countrywide Mortgage Loans.

            Countrywide Mortgage Loans: The Mortgage Loans for which Countrywide
is listed as "Servicer" on the Mortgage Loan Schedule.

            Countrywide Servicing Agreement: Solely with respect to the
Countrywide Mortgage Loans, the Mortgage Loan Purchase and Servicing Agreement,
dated as of November 1, 2001, as amended by Amendment No. 1, dated as of
November 15, 2002, between the Transferor, as purchaser, and Countrywide, as
seller and as servicer (as successor to Countrywide Home Loans, Inc. by an
assignment dated January 1, 2002, as the same may be amended or supplemented),
as the same may be further amended from time to time, and any assignments and
conveyances related to the Countrywide Mortgage Loans.

            Covered Loan: A Mortgage Loan categorized as Covered pursuant to
Appendix E of Standard & Poor's Glossary.

            Cross-Over Date: The Distribution Date on which the Class Principal
Balances of the Subordinate Certificates have been reduced to zero.

            Custodian: Wells Fargo with respect to those Mortgage Loans for
which Wells Fargo is listed under the heading "Custodian" in the Mortgage Loan
Schedule.

            Cut-off Date: With respect to the Mortgage Loans other than the
Alternate Cut-Off Date Mortgage Loans, February 1, 2005. With respect to the
Alternate Cut-Off Date Mortgage Loans, March 1, 2005.

            Cut-off Date Pool Balance: $683,815,668.

            Cut-off Date Principal Balance: As to any Mortgage Loan, the
Scheduled Principal Balance thereof as of the close of business on the Cut-off
Date.

            Debt Service Reduction: With respect to any Mortgage Loan, a
reduction by a court of competent jurisdiction in a proceeding under the
Bankruptcy Code in the Scheduled Payment for such Mortgage Loan which became
final and non appealable, except such a reduction resulting from a Deficient
Valuation or any reduction that results in a permanent forgiveness of principal.

            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 Payment
that results in a permanent forgiveness of principal, which valuation or
reduction results from an order of such court which is final and non appealable
in a proceeding under the Bankruptcy Code.

            Definitive Certificates: Any Certificate evidenced by a Physical
Certificate and any Certificate issued in lieu of a Book-Entry Certificate
pursuant to Section 5.02(e).

            Deleted Mortgage Loan: As defined in Section 2.03 hereof.

            Denomination: With respect to each Certificate, the amount set forth
on the face thereof as the "Initial Certificate Principal Balance of this
Certificate" or the "Initial Notional Amount of this Certificate" or, if neither
of the foregoing, the Percentage Interest appearing on the face thereof.

            Depositor: Mortgage Asset Securitization Transactions, Inc., a
Delaware corporation, or its successor in interest.

            Depository: The initial Depository shall be The Depository Trust
Company, the nominee of which is CEDE & Co., as the registered Holder of the
Book-Entry Certificates. The Depository shall at all times be a "clearing
corporation" as defined in Section 8 102(a)(5) of the Uniform Commercial Code of
the State of New York.

            Depository Participant: A broker, dealer, bank or other financial
institution or other Person for whom from time to time a Depository effects book
entry transfers and pledges of securities deposited with the Depository.

            Determination Date: The date on which a Servicer is required to
determine the amount it is required to advance pursuant to the applicable
Servicing Agreement.

            Distribution Account: The separate Eligible Account created and
maintained by the Trust Administrator pursuant to Section 3.07 in the name of
the Trustee for the benefit of the Certificateholders and designated "JPMorgan
Chase Bank, N.A., in trust for registered holders of MASTR Adjustable Rate
Mortgages Trust 2005-2 Mortgage Pass-Through Certificates, Series 2005-2." Funds
in the Distribution Account shall be held in trust for the Certificateholders
for the uses and purposes set forth in this Agreement.

            Distribution Account Deposit Date: As to any Distribution Date, one
Business Day prior to such Distribution Date.

            Distribution Date: The 25th day of each calendar month after the
initial issuance of the Certificates, or if such 25th day is not a Business Day,
the next succeeding Business Day, commencing in March 2005.

            Distribution Date Statement: The statement delivered to the
Certificateholders pursuant to Section 4.04.

            DBRS: Dominion Bond Rating Service, Inc. or any successor thereto.
If DBRS is designated as a Rating Agency in the Preliminary Statement, for
purposes of Section 11.05(b), the address for notices to DBRS shall be 55
Broadway, New York, NY 10006, Attention: RMBS Surveillance-MASTR Adjustable Rate
Mortgages Trust 2005-2, or such other address as DBRS may hereafter furnish to
each party to this Agreement.

            Due Date: With respect to any Distribution Date, the first day of
the month in which the related Distribution Date occurs.

            Eligible Account: Any of (i) an account or accounts maintained with
a federal or state chartered depository institution or trust company the short
term unsecured debt obligations of which (or, in the case of a depository
institution or trust company that is the principal subsidiary of a holding
company, the debt obligations of such holding company) have the highest short
term ratings of each Rating Agency at the time any amounts are held on deposit
therein, or (ii) an account or accounts in a depository institution or trust
company in which such accounts are insured by the FDIC (to the limits
established by the FDIC) and the uninsured deposits in which accounts are
otherwise secured such that, as evidenced by an Opinion of Counsel delivered to
the Trust Administrator and the Trustee and to each Rating Agency, the
Certificateholders have a claim with respect to the funds in such account or a
perfected first priority security interest against any collateral (which shall
be limited to Permitted Investments) securing such funds that is superior to
claims of any other depositors or creditors of the depository institution or
trust company in which such account is maintained, or (iii) a segregated trust
account or accounts maintained with the corporate trust department of a federal
depository institution or state-chartered depository institution subject to
regulations regarding fiduciary funds on deposit similar to Title 12 of the U.S.
Code of Federal Regulation Section 9.10(b), which, in either case, has corporate
trust powers and is acting in its fiduciary capacity or (iv) any other account
acceptable to each Rating Agency. Eligible Accounts may bear interest, and may
include, if otherwise qualified under this definition, accounts maintained with
the Trust Administrator.

            Eligible Substitute Mortgage Loan: With respect to a Mortgage Loan
substituted by the Transferor for a Deleted Mortgage Loan, a Mortgage Loan which
must, on the date of such substitution, (i) have a Scheduled Principal Balance,
after deduction of the principal portion of the Scheduled Payment due in the
month of substitution (or, in the case of a substitution of more than one
mortgage loan for a Deleted Mortgage Loan, an aggregate principal balance), not
in excess of, and not more than 10% less than the Scheduled Principal Balance of
the Deleted Mortgage Loan; (ii) be accruing interest at a rate no lower than,
and not more than 1% per annum higher than, that of the Deleted Mortgage Loan;
(iii) have a Loan-to-Value Ratio no higher than that of the Deleted Mortgage
Loan; (iv) have the same index and Periodic Rate Cap as that of the Deleted
Mortgage Loan and a gross margin not more than 1% per annum higher or lower than
that of the Deleted Mortgage Loan; (v) does not permit conversion of the related
interest rate to a fixed interest rate; (vi) have a remaining term to maturity
no greater than (and not more than one year less than that of) the Deleted
Mortgage Loan; (vii) comply with each representation and warranty set forth in
Section 2.03 hereof; (viii) be the same credit grade category as the Deleted
Mortgage Loan; (ix) have the same prepayment penalty term; and (x) not be a
Cooperative Loan unless the Deleted Mortgage Loan was a Cooperative Loan.

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

            ERISA Restricted Certificate: As specified in the Preliminary
Statement.

            Escrow Account: The Eligible Account or Accounts established and
maintained pursuant to Section 3.08 hereof.

            Excess Loss: With respect to any Mortgage Loan, the amount of any
(i) Fraud Loss realized after the Fraud Loss Coverage Termination Date, (ii)
Special Hazard Loss realized after the Special Hazard Coverage Termination Date
or (iii) Deficient Valuation realized after the Bankruptcy Coverage Termination
Date.

            Excess Proceeds: With respect to any Liquidated Loan, the amount, if
any, by which the sum of any Liquidation Proceeds of such Mortgage Loan received
in the calendar month in which such Mortgage Loan became a Liquidated Loan,
exceeds (i) the Scheduled Principal Balance of such Liquidated Loan as of the
Due Date in the month in which such Mortgage Loan became a Liquidated Loan plus
(ii) accrued interest at the Mortgage Rate from the Due Date as to which
interest was last paid or advanced (and not reimbursed) to Certificateholders up
to the Due Date applicable to the Distribution Date immediately following the
calendar month during which such liquidation occurred.

            Exchange Act: The Securities Exchange Act of 1934, as amended from
time to time.

            Fair Market Value Call Price: With respect to each Mortgage Loan
(not including REO Properties) to be purchased pursuant to Section 10.01(a)
hereof, the fair market value of such Mortgage Loan (to be determined pursuant
to a bid procedure set forth in Section 10.01(b) hereof) plus accrued and unpaid
interest thereon at the applicable Net Mortgage Rate.

            Fair Market Value Excess: With respect to each Mortgage Loan to be
purchased pursuant to Section 10.01(a) hereof, the excess, if any, of the Fair
Market Value Call Price for such Mortgage Loan, over the Par Call Price for such
Mortgage Loan. Any Fair Market Value Excess will not become part of the related
Group Available Funds, but shall instead be distributed directly to the Holders
of the Class A-LR Certificates pursuant to Section 4.02(g) hereof.

            Fannie Mae: Fannie Mae, a federally chartered and privately owned
corporation organized and existing under the Federal National Mortgage
Association Charter Act, or any successor thereto.

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

            Final Certification: With respect to the Custodian, the
certification required to be delivered by such Custodian not more than 90 days
after the Closing Date to the Depositor, the Trustee and the Transferor in the
form annexed hereto as Exhibit G pursuant to Section 2.02 of this Agreement.

            Financing Statement: A financing statement in the form of a UCC-1 or
UCC-3, as applicable, filed pursuant to the Uniform Commercial Code to perfect a
security interest in the Cooperative Shares and Pledge Instruments.

            Fitch: Fitch, Inc., or any successor thereto. If Fitch is designated
as a Rating Agency in the Preliminary Statement, for purposes of Section
11.05(b), the address for notices to Fitch shall be One State Street Plaza, New
York, NY 10004, Attention: MBS Monitoring MASTR Adjustable Rate Mortgages Trust
2005-2, or such other address as Fitch may hereafter furnish to each party to
this Agreement.

            Fractional Interest: As to any Distribution Date and each Class of
Subordinate Certificates, the fraction (expressed as a percentage), the
numerator of which is the aggregate Certificate Principal Balance of such Class
and each Class subordinate to such Class, if any, and the denominator of which
is the aggregate Scheduled Principal Balance for all Loan Groups.

            Fraud Loan: A Liquidated Loan as to which a Fraud Loss has occurred.

            Fraud Loss Coverage Amount: As of the Closing Date, $20,514,470,
subject to reduction from time to time by the aggregate amount of Fraud Losses
that would have been previously allocated to the Subordinate Certificates in the
absence of the Loss Allocation Limitation since the Cut-off Date. In addition,
the Fraud Loss Coverage Amount will be reduced as follows: (a) on the first
anniversary of February 1, 2005, to an amount equal to $13,676,313 less the
amount of Fraud Losses that would have been previously allocated to the
Subordinate Certificates in the absence of the Loss Allocation Limitation, (b)
on the second anniversary of February 1, 2005, to an amount equal to $6,838,156
less the amount of Fraud Losses that would have been previously allocated to the
Subordinate Certificates in the absence of the Loss Allocation Limitation and
(c) on the earlier to occur of the Cross-Over Date and the fifth anniversary of
February 1, 2005, to zero.

            Fraud Loss Coverage Termination Date: The point in time at which the
Fraud Loss Coverage Amount is reduced to zero.

            Fraud Losses: Realized Losses on Mortgage Loans as to which a loss
is sustained by reason of a default arising from fraud, dishonesty or
misrepresentation in connection with the related Mortgage Loan, including a loss
by reason of the denial of coverage under any related Primary Insurance Policy
because of such fraud, dishonesty or misrepresentation as reported by the
applicable Servicer to the Master Servicer.

             Freddie Mac: Freddie Mac, a corporate instrumentality of the United
States created and existing under Title III of the Emergency Home Finance Act of
1970, as amended, or any successor thereto.

            GMAC: GMAC Mortgage Corporation and its successors and assigns, in
its capacity as Servicer of the GMAC Mortgage Loans.

            GMAC Mortgage Loans: The Mortgage Loans for which GMAC is listed as
"Servicer" in the Mortgage Loan Schedule.

            GMAC Servicing Agreement: Solely with respect to the GMAC Mortgage
Loans, the Servicing Agreement, dated as of November 1, 2001, between the
Transferor and GMAC, as amended by Amendment Number One, dated as of January 1,
2003, as the same may be further amended from time to time, and any assignment
and conveyance related to the GMAC Mortgage Loans.

            Grantor Trust: That portion of the Trust, exclusive of the Trust
REMICs, that holds the rights of the Class P Certificateholders to Class P
Prepayment Charges.

            GreenPoint: GreenPoint Mortgage Funding, Inc. and its successors and
assigns, in its capacity as Servicer of the GreenPoint Mortgage Loans.

            GreenPoint Mortgage Loans: The Mortgage Loans for which GreenPoint
is listed as "Servicer" on the Mortgage Loan Schedule.

            GreenPoint Servicing Agreement: Solely with respect to the
GreenPoint Mortgage Loans, the Master Loan Purchase and Servicing Agreement,
dated as of March 1, 2003, between the Transferor, as purchaser, and GreenPoint,
as seller and servicer, as amended by Amendment Number One, dated May 30, 2003,
as further amended by Amendment Number Two, dated January 8, 2004, as further
amended by Amendment No. Three, dated July 1, 2004, and as the same may be
further amended from time to time.

            Group 1 Available Funds: As to any Distribution Date, the sum of (a)
the aggregate amount held in the Collection Account at the close of business on
the related Servicer Remittance Date and, without duplication, on deposit in the
Distribution Account at the close of business on the related Distribution
Account Deposit Date, attributable to the Group 1 Mortgage Loans net of the
Amount Held for Future Distribution related to the Group 1 Mortgage Loans and
net of amounts (i) permitted to be withdrawn from the Collection Account
pursuant to clauses (i)-(viii) inclusive and clauses (ix)(A)(ii), (ix)(B), (x)
and (xi) of Section 3.10(a), (ii) after giving effect to all amounts deposited
to the Distribution Account from the Collection Account, amounts permitted to be
withdrawn from the Distribution Account pursuant to clauses (i) through (iv)
inclusive of Section 3.10(b) each as it relates to the Group 1 Mortgage Loans
and (iii) any amounts representing Fair Market Value Excess with respect to a
Group 1 Mortgage Loan received in connection with the termination of the Trust
Fund pursuant to Section 10.01 hereof, (b) the amount of the Advances related to
the Group 1 Mortgage Loans, and (c) in connection with Deleted Mortgage Loans in
Loan Group 1, as applicable, the aggregate of the Purchase Prices and
Substitution Adjustment Amounts deposited on the related Distribution Account
Deposit Date.

            Group 1 Certificates: As specified in the Preliminary Statement.

            Group 1 Mortgage Loans: Those Mortgage Loans identified on the
Mortgage Loan Schedule as Group 1 Mortgage Loans.

            Group 1 Pool Principal Balance: As to any Distribution Date, the
aggregate of the Scheduled Principal Balances of the Group 1 Mortgage Loans that
were Outstanding Mortgage Loans on the Due Date in the month preceding the month
of such Distribution Date.

            Group 1 Subordinate Amount: As to any Distribution Date, the excess
of (i) the aggregate Scheduled Principal Balance of the Group 1 Mortgage Loans
over (ii) the sum of the Class Principal Balances of the Group 1 Certificates.

            Group 2 Available Funds: As to any Distribution Date, the sum of (a)
the aggregate amount held in the Collection Account at the close of business on
the related Servicer Remittance Date and, without duplication, on deposit in the
Distribution Account at the close of business on the related Distribution
Account Deposit Date, attributable to the Group 2 Mortgage Loans net of the
Amount Held for Future Distribution related to the Group 2 Mortgage Loans and
net of amounts (i) permitted to be withdrawn from the Collection Account
pursuant to clauses (i)-(viii) inclusive and clauses (ix)(A)(ii), (ix)(B), (x)
and (xi) of Section 3.10(a), (ii) after giving effect to all amounts deposited
to the Distribution Account from the Collection Account, amounts permitted to be
withdrawn from the Distribution Account pursuant to clauses (i)-(iv) inclusive
of Section 3.10(b) each as it relates to the Group 2 Mortgage Loans and (iii)
any amounts representing Fair Market Value Excess with respect to a Group 2
Mortgage Loan received in connection with the termination of the Trust Fund
pursuant to Section 10.01 hereof, (b) the amount of the Advances related to the
Group 2 Mortgage Loans, and (c) in connection with Deleted Mortgage Loans in
Loan Group 2, as applicable, the aggregate of the Purchase Prices and
Substitution Adjustment Amounts deposited on the related Distribution Account
Deposit Date.

            Group 2 Certificates: As specified in the Preliminary Statement.

            Group 2 Mortgage Loans: Those Mortgage Loans identified on the
Mortgage Loan Schedule as Group 2 Mortgage Loans.

            Group 2 Pool Principal Balance: As to any Distribution Date, the
aggregate of the Scheduled Principal Balances of the Group 2 Mortgage Loans that
were Outstanding Mortgage Loans on the Due Date in the month preceding the month
of such Distribution Date.

            Group 2 Subordinate Amount: As to any Distribution Date, the excess
of (i) the aggregate Scheduled Principal Balance of the Group 2 Mortgage Loans
over (ii) the sum of the Class Principal Balances of the Group 2 Certificates.

            Group 3 Available Funds: As to any Distribution Date, the sum of (a)
the aggregate amount held in the Collection Account at the close of business on
the related Servicer Remittance Date and, without duplication, on deposit in the
Distribution Account at the close of business on the related Distribution
Account Deposit Date, attributable to the Group 3 Mortgage Loans net of the
Amount Held for Future Distribution related to the Group 3 Mortgage Loans and
net of amounts (i) permitted to be withdrawn from the Collection Account
pursuant to clauses (i)-(viii) inclusive and clauses (ix)(A)(ii), (ix)(B), (x)
and (xi) of Section 3.10(a), (ii) after giving effect to all amounts deposited
to the Distribution Account from the Collection Account, amounts permitted to be
withdrawn from the Distribution Account pursuant to clauses (i)-(iv) inclusive
of Section 3.10(b) each as it relates to the Group 3 Mortgage Loans and (iii)
any amounts representing Fair Market Value Excess with respect to a Group 3
Mortgage Loan received in connection with the termination of the Trust Fund
pursuant to Section 10.01 hereof, (b) the amount of the Advances related to the
Group 3 Mortgage Loans, and (c) in connection with Deleted Mortgage Loans in
Loan Group 3, as applicable, the aggregate of the Purchase Prices and
Substitution Adjustment Amounts deposited on the related Distribution Account
Deposit Date.

            Group 3 Certificates: As specified in the Preliminary Statement.

            Group 3 Mortgage Loans: Those Mortgage Loans identified on the
Mortgage Loan Schedule as Group 3 Mortgage Loans.

            Group 3 Pool Principal Balance: As to any Distribution Date, the
aggregate of the Scheduled Principal Balances of the Group 3 Mortgage Loans that
were Outstanding Mortgage Loans on the Due Date in the month preceding the month
of such Distribution Date.

            Group 3 Subordinate Amount: As to any Distribution Date, the excess
of (i) the aggregate Scheduled Principal Balance of the Group 3 Mortgage Loans
over (ii) the sum of the Class Principal Balances of the Group 3 Certificates.

            Group 4 Available Funds: As to any Distribution Date, the sum of (a)
the aggregate amount held in the Collection Account at the close of business on
the related Servicer Remittance Date and, without duplication, on deposit in the
Distribution Account at the close of business on the related Distribution
Account Deposit Date, attributable to the Group 4 Mortgage Loans net of the
Amount Held for Future Distribution related to the Group 4 Mortgage Loans and
net of amounts (i) permitted to be withdrawn from the Collection Account
pursuant to clauses (i)-(viii) inclusive and clauses (ix)(A)(ii), (ix)(B), (x)
and (xi) of Section 3.10(a), (ii) after giving effect to all amounts deposited
to the Distribution Account from the Collection Account, amounts permitted to be
withdrawn from the Distribution Account pursuant to clauses (i)-(iv) inclusive
of Section 3.10(b) each as it relates to the Group 4 Mortgage Loans and (iii)
any amounts representing Fair Market Value Excess with respect to a Group 4
Mortgage Loan received in connection with the termination of the Trust Fund
pursuant to Section 10.01 hereof, (b) the amount of the Advances related to the
Group 4 Mortgage Loans, and (c) in connection with Deleted Mortgage Loans in
Loan Group 4, as applicable, the aggregate of the Purchase Prices and
Substitution Adjustment Amounts deposited on the related Distribution Account
Deposit Date.

            Group 4 Certificates: As specified in the Preliminary Statement.

            Group 4 Mortgage Loans: Those Mortgage Loans identified on the
Mortgage Loan Schedule as Group 4 Mortgage Loans.

            Group 4 Pool Principal Balance: As to any Distribution Date, the
aggregate of the Scheduled Principal Balances of the Group 4 Mortgage Loans that
were Outstanding Mortgage Loans on the Due Date in the month preceding the month
of such Distribution Date.

            Group 4 Subordinate Amount: As to any Distribution Date, the excess
of (i) the aggregate Scheduled Principal Balance of the Group 4 Mortgage Loans
over (ii) the sum of the Class Principal Balances of the Group 4 Certificates.

            Group 5 Available Funds: As to any Distribution Date, the sum of (a)
the aggregate amount held in the Collection Account at the close of business on
the related Servicer Remittance Date and, without duplication, on deposit in the
Distribution Account at the close of business on the related Distribution
Account Deposit Date, attributable to the Group 5 Mortgage Loans net of the
Amount Held for Future Distribution related to the Group 5 Mortgage Loans and
net of amounts (i) permitted to be withdrawn from the Collection Account
pursuant to clauses (i)-(viii) inclusive and clauses (ix)(A)(ii), (ix)(B), (x)
and (xi) of Section 3.10(a), (ii) after giving effect to all amounts deposited
to the Distribution Account from the Collection Account, amounts permitted to be
withdrawn from the Distribution Account pursuant to clauses (i)-(iv) inclusive
of Section 3.10(b) each as it relates to the Group 5 Mortgage Loans and (iii)
any amounts representing Fair Market Value Excess with respect to a Group 5
Mortgage Loan received in connection with the termination of the Trust Fund
pursuant to Section 10.01 hereof, (b) the amount of the Advances related to the
Group 5 Mortgage Loans, and (c) in connection with Deleted Mortgage Loans in
Loan Group 5, as applicable, the aggregate of the Purchase Prices and
Substitution Adjustment Amounts deposited on the related Distribution Account
Deposit Date.

            Group 5 Certificates: As specified in the Preliminary Statement.

            Group 5 Mortgage Loans: Those Mortgage Loans identified on the
Mortgage Loan Schedule as Group 5 Mortgage Loans.

            Group 5 Pool Principal Balance: As to any Distribution Date, the
aggregate of the Scheduled Principal Balances of the Group 5 Mortgage Loans that
were Outstanding Mortgage Loans on the Due Date in the month preceding the month
of such Distribution Date.

            Group 5 Subordinate Amount: As to any Distribution Date, the excess
of (i) the aggregate Scheduled Principal Balance of the Group 5 Mortgage Loans
over (ii) the sum of the Class Principal Balances of the Group 5 Certificates.

            Group 6 Available Funds: As to any Distribution Date, the sum of (a)
the aggregate amount held in the Collection Account at the close of business on
the related Servicer Remittance Date and, without duplication, on deposit in the
Distribution Account at the close of business on the related Distribution
Account Deposit Date, attributable to the Group 6 Mortgage Loans net of the
Amount Held for Future Distribution related to the Group 6 Mortgage Loans and
net of amounts (i) permitted to be withdrawn from the Collection Account
pursuant to clauses (i)-(viii) inclusive and clauses (ix)(A)(ii), (ix)(B), (x)
and (xi) of Section 3.10(a), (ii) after giving effect to all amounts deposited
to the Distribution Account from the Collection Account, amounts permitted to be
withdrawn from the Distribution Account pursuant to clauses (i)-(iv) inclusive
of Section 3.10(b) each as it relates to the Group 6 Mortgage Loans and (iii)
any amounts representing Fair Market Value Excess with respect to a Group 6
Mortgage Loan received in connection with the termination of the Trust Fund
pursuant to Section 10.01 hereof, (b) the amount of the Advances related to the
Group 6 Mortgage Loans, and (c) in connection with Deleted Mortgage Loans in
Loan Group 6, as applicable, the aggregate of the Purchase Prices and
Substitution Adjustment Amounts deposited on the related Distribution Account
Deposit Date.

            Group 6 Certificates: As specified in the Preliminary Statement.

            Group 6 Mortgage Loans: Those Mortgage Loans identified on the
Mortgage Loan Schedule as Group 6 Mortgage Loans.

            Group 6 Pool Principal Balance: As to any Distribution Date, the
aggregate of the Scheduled Principal Balances of the Group 6 Mortgage Loans that
were Outstanding Mortgage Loans on the Due Date in the month preceding the month
of such Distribution Date.

            Group 6 Subordinate Amount: As to any Distribution Date, the excess
of (i) the aggregate Scheduled Principal Balance of the Group 6 Mortgage Loans
over (ii) the sum of the Class Principal Balances of the Group 6 Certificates.

            Group 7 Available Funds: As to any Distribution Date, the sum of (a)
the aggregate amount held in the Collection Account at the close of business on
the related Servicer Remittance Date and, without duplication, on deposit in the
Distribution Account at the close of business on the related Distribution
Account Deposit Date, attributable to the Group 7 Mortgage Loans net of the
Amount Held for Future Distribution related to the Group 7 Mortgage Loans and
net of amounts (i) permitted to be withdrawn from the Collection Account
pursuant to clauses (i)-(viii) inclusive and clauses (ix)(A)(ii), (ix)(B), (x)
and (xi) of Section 3.10(a), (ii) after giving effect to all amounts deposited
to the Distribution Account from the Collection Account, amounts permitted to be
withdrawn from the Distribution Account pursuant to clauses (i)-(iv) inclusive
of Section 3.10(b) each as it relates to the Group 7 Mortgage Loans and (iii)
any amounts representing Fair Market Value Excess with respect to a Group 7
Mortgage Loan received in connection with the termination of the Trust Fund
pursuant to Section 10.01 hereof, (b) the amount of the Advances related to the
Group 7 Mortgage Loans, and (c) in connection with Deleted Mortgage Loans in
Loan Group 7, as applicable, the aggregate of the Purchase Prices and
Substitution Adjustment Amounts deposited on the related Distribution Account
Deposit Date.

            Group 7 Certificates: As specified in the Preliminary Statement.

            Group 7 Mortgage Loans: Those Mortgage Loans identified on the
Mortgage Loan Schedule as Group 7 Mortgage Loans.

             Group 7 Pool Principal Balance: As to any Distribution Date, the
aggregate of the Scheduled Principal Balances of the Group 7 Mortgage Loans that
were Outstanding Mortgage Loans on the Due Date in the month preceding the month
of such Distribution Date.

            Group 7 Subordinate Amount: As to any Distribution Date, the excess
of (i) the aggregate Scheduled Principal Balance of the Group 7 Mortgage Loans
over (ii) the sum of the Class Principal Balances of the Group 7 Certificates
(other than the related Interest-Only Certificates).

            Group Available Funds: Any of the Group 1 Available Funds, Group 2
Available Funds, Group 3 Available Funds, Group 4 Available Funds, Group 5
Available Funds, Group 6 Available Funds and Group 7 Available Funds, as
applicable.

            Group Pool Principal Balance: Any of the Group 1 Pool Principal
Balance, Group 2 Pool Principal Balance, Group 3 Pool Principal Balance, Group 4
Pool Principal Balance, Group 5 Pool Principal Balance, Group 6 Pool Principal
Balance and Group 7 Pool Principal Balance, as applicable.

            Group Subordinate Amount: Each of the Group 1 Subordinate Amount,
Group 2 Subordinate Amount, Group 3 Subordinate Amount, Group 4 Subordinate
Amount, Group 5 Subordinate Amount, Group 6 Subordinate Amount and Group 7
Subordinate Amount, as applicable.

            High Cost Loan: A Mortgage Loan classified as (a) a "high cost" loan
under the Home Ownership and Equity Protection Act of 1994, (b) a "high cost
home," "threshold," "covered," (excluding New Jersey "Covered Home Loans" as
that term is defined in clause (1) of the definition of that term in the New
Jersey Home Ownership Security Act of 2002), "high risk home," "predatory" or
similar loan under any other applicable state, federal or local law (or a
similarly classified loan using different terminology under a law imposing
heightened regulatory scrutiny or additional legal liability for residential
mortgage loans having high interest rates, points and/or fees) or (c) a Mortgage
Loan categorized as High Cost pursuant to Appendix E of Standard and Poor's
Glossary.

            Home Loan: A Mortgage Loan categorized as Home Loan pursuant to
Appendix E of Standard & Poor's Glossary.

            Incremental Interest: As to any Mortgage Loan, the amount of
interest accrued on such Mortgage Loan attributable to the Incremental Rate;
provided, however, that with respect to any payment of interest received in
respect of a Mortgage Loan (whether paid by the Mortgagor or received as
Liquidation Proceeds or otherwise) that is less than the full amount of interest
then due with respect to such Mortgage Loan, only that portion of such payment
of interest that bears the same relationship to the total amount of such payment
of interest as the Incremental Rate, if any, in respect of such Mortgage Loan
bears to the Mortgage Rate shall be allocated to the Incremental Interest with
respect thereto.

            Incremental Rate: Prior to the first Adjustment Date for a Mortgage
Loan, the per annum increase to the initial Mortgage Rate set forth in an
addendum to the related Mortgage Note, which increase takes effect upon the
happening of certain specified conditions, as provided in the Mortgage Note and
any attachments thereto, and remains in effect until the first Adjustment Date.

            Indirect Participant: A broker, dealer, bank or other financial
institution or other Person that clears through or maintains a custodial
relationship with a Depository Participant.

            Initial Bankruptcy Coverage Amount: $299,507.

            Initial Certification: With respect to the Custodian, the
certification required to be executed by such Custodian and delivered on the
Closing Date to the Depositor and the Trustee in the form annexed hereto as
Exhibit F pursuant to Section 2.02 of this Agreement.

            Initial Depositor Required Deposit: The amount required to be paid
by the Depositor pursuant to Section 2.01(d), equal to one month of interest
that would have accrued at the applicable Net Mortgage Rate on the Scheduled
Principal Balance of each Alternate Cut-off Date Mortgage Loan for the Interest
Accrual Period related to the Distribution Date in March 2005 had the Cut-off
Date for such Mortgage Loans been February 1, 2005 (instead of March 1, 2005).

            Insolvency Proceeding: With respect to any Person: (i) any case,
action, or proceeding with respect to such Person before any court or other
governmental authority relating to bankruptcy, reorganization, insolvency,
liquidation, receivership, dissolution, winding up, or relief of debtors; or
(ii) any general assignment for the benefit of creditors, composition,
marshaling of assets for creditors, or other, similar arrangement in respect of
the creditors generally of such Person or any substantial portion of such
Person's creditors, in any case undertaken under federal, state or foreign law,
including the Bankruptcy Code.

            Insurance Policy: With respect to any Mortgage Loan included in the
Trust Fund, any insurance policy, including all riders and endorsements thereto
in effect, including any replacement policy or policies for any Insurance
Policies.

            Insurance Proceeds: Proceeds paid by an insurer pursuant to any
Insurance Policy, in each case other than any amount included in such Insurance
Proceeds in respect of Insured Expenses, to the extent such proceeds are not
applied to the restoration of the related Mortgaged Property or released to the
borrower in accordance with the applicable Servicer's normal servicing
procedures.

            Insured Expenses: Expenses covered by an Insurance Policy or any
other insurance policy with respect to the Mortgage Loans.

            Interest Accrual Period: With respect to each Class of Certificates,
each Lower-Tier REMIC Regular Interest, each Middle-Tier REMIC Regular Interest
and any Distribution Date, the period from and including the first day of the
month immediately preceding the month in which such Distribution Date occurs,
commencing February 1, 2005, to and including the last day of such immediately
preceding month on the basis of a 360-day year consisting of twelve (12) 30-day
months.

            Interest-Only Certificates: As specified in the Preliminary
Statement.

            Latest Possible Maturity Date: The Distribution Date following the
first anniversary of the scheduled maturity date of the Mortgage Loan having the
latest scheduled maturity date as of the Cut-off Date.

            Lender-Paid Mortgage Insurance Amount: With respect to any
Lender-Paid Mortgage Insurance Loan, the interest portion of each Scheduled
Payment that is paid by the related Mortgagor that will be used to pay the
monthly premium of the "lender-paid" Primary Insurance Policy on such
Lender-Paid Mortgage Insurance Loan, which is calculated by multiplying the
Scheduled Principal Balance as of the related date of determination on such
Lender-Paid Mortgage Insurance Loan by the applicable Lender-Paid Mortgage
Insurance Rate.

            Lender-Paid Mortgage Insurance Loan: Each of the Mortgage Loans
identified on the Mortgage Loan Schedule as having a Lender-Paid Mortgage
Insurance Rate.

            Lender-Paid Mortgage Insurance Rate: With respect to any Lender-Paid
Mortgage Insurance Loan, a per annum rate equal to the percentage indicated on
the Mortgage Loan Schedule under the heading "Lender-Paid Mortgage Insurance
Rate."

            Liquidated Loan: With respect to any Distribution Date, a defaulted
Mortgage Loan (including any REO Property) which was liquidated in the calendar
month preceding the month of such Distribution Date and as to which the
applicable Servicer or the Master Servicer, as the case may be, has determined
(in accordance with the applicable Servicing Agreement and this Agreement) that
it has received all amounts it expects to receive in connection with the
liquidation of such Mortgage Loan, including the final disposition of an REO
Property.

            Liquidation Proceeds: Amounts, including Insurance Proceeds,
received in connection with the partial or complete liquidation of defaulted
Mortgage Loans, whether through trustee's sale, foreclosure sale or otherwise or
amounts received in connection with any condemnation or partial release of a
Mortgaged Property and any other proceeds received in connection with an REO
Property, less the sum of related unreimbursed Servicing Fees, Servicing
Advances and Advances.

            Loan Group: Each of Loan Group 1, Loan Group 2, Loan Group 3, Loan
Group 4, Loan Group 5, Loan Group 6 and Loan Group 7, as applicable.

            Loan Group 1: The Group 1 Mortgage Loans.

            Loan Group 2: The Group 2 Mortgage Loans.

            Loan Group 3: The Group 3 Mortgage Loans.

            Loan Group 4: The Group 4 Mortgage Loans.

            Loan Group 5: The Group 5 Mortgage Loans.

            Loan Group 6: The Group 6 Mortgage Loans.

            Loan Group 7: The Group 7 Mortgage Loans.

            Loan Seller: With respect to any Mortgage Loan, the entity that sold
such Mortgage Loan to the Transferor.

             Loan-to-Value Ratio: With respect to any Mortgage Loan and as to any
date of determination, the fraction (expressed as a percentage) the numerator of
which is the principal balance of the related Mortgage Loan at such date of
determination and the denominator of which is the Appraised Value of the related
Mortgaged Property. For purposes of representation (xxxii) on Schedule II, the
Loan-to-Value Ratio will be the loan-to-value ratio calculated in accordance
with applicable state laws regarding primary mortgage insurance.

            London Business Day: Any Business Day on which banks are open for
dealing in foreign currency and exchange in London, England and the city of New
York.

            Loss Allocation Limitation: As defined in Section 4.03(c) hereof.

            Lost Mortgage Note: Any Mortgage Note the original of which was
permanently lost or destroyed and has not been replaced.

            Lower-Tier REMIC: As described in the Preliminary Statement.

            Lower-Tier REMIC Interest: Any one of the Lower-Tier REMIC Regular
Interests or the Class A-LR Certificates.

            Lower-Tier REMIC Regular Interest: Any of the Class L-1B Interest,
Class L-1Q Interest, Class L-2B Interest, Class L-2Q Interest, Class L-3B
Interest, Class L-3Q Interest, Class L-4B Interest, Class L-4Q Interest, Class
L-5B Interest, Class L-5Q Interest, Class L-6B Interest, Class L-6Q Interest,
Class L-7B Interest and Class L-7Q Interest.

            Lower-Tier Subordinated Balance Ratio: The ratio among the principal
balances of the Class L-1B Interest, Class L-2B Interest, Class L-3B Interest,
Class L-4B Interest, Class L-5B Interest, Class L-6B Interest and Class L-7B
Interest equal to the ratio among the Group 1 Subordinate Amount, the Group 2
Subordinate Amount, Group 3 Subordinate Amount, the Group 4 Subordinate Amount,
the Group 5 Subordinate Amount, Group 6 Subordinate Amount and the Group 7
Subordinate Amount.

            Majority in Interest: As to any Class of Regular Certificates, the
Holders of Certificates of such Class evidencing, in the aggregate, at least 51%
of the Percentage Interests evidenced by all Certificates of such Class.

            Master Servicer: Wells Fargo, in its capacity as Master Servicer
hereunder.

            Master Servicer Event of Termination: As defined in Section 7.01
hereof.

            Master Servicing Compensation: All investment earnings on amounts on
deposit in the Collection Account.

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

            MERS: As defined in Section 2.01.

            Middle-Tier REMIC: As described in the Preliminary Statement.

            Middle-Tier REMIC Interest: Any one of the Middle-Tier REMIC Regular
Interests or Class A-MR Interest.

            Middle-Tier REMIC Regular Interest: Any of the Class 1-A-M1
Interest, Class 2-A-M1 Interest, Class 3-A-M1 Interest, Class 4-A-M1 Interest,
Class 5-A-M1 Interest, Class 6-A-M1 Interest, Class 7-A-M1 Interest, Class
7-A-M2 Interest, Class B-M1 Interest, Class B-M2 Interest, Class B-M3 Interest,
Class B-M4 Interest, Class B-M5 Interest and Class B-M6 Interest.

            Moody's: Moody's Investors Service, Inc., or any successor thereto.
If Moody's is designated as a Rating Agency in the Preliminary Statement, for
purposes of Section 11.05(b), the address for notices to Moody's shall be
Moody's Investors Service, Inc., 99 Church Street, New York, New York 10007,
Attention: Residential Mortgage Monitoring Group, or such other address as
Moody's may hereafter furnish to each party to this Agreement.

            Mortgage: The mortgage, deed of trust or other instrument creating a
first lien on an estate in fee simple or leasehold interest in real property
securing a Mortgage Note.

            Mortgage File: The mortgage documents listed in Section 2.01 hereof
pertaining to a particular Mortgage Loan and any additional documents delivered
to the Custodian to be added to the Mortgage File pursuant to this Agreement.

            Mortgage Loan Purchase Agreement: The Mortgage Loan Purchase
Agreement, dated as of February 1, 2005, between the Transferor and the
Depositor.

            Mortgage Loan Schedule: The list of Mortgage Loans (as from time to
time amended by the Custodian to reflect the addition of Eligible Substitute
Mortgage Loans and the deletion of Deleted Mortgage Loans pursuant to the
provisions of this Agreement) transferred to the Trustee as part of the Trust
Fund and from time to time subject to this Agreement, attached hereto as
Schedule I, setting forth the following information with respect to each
Mortgage Loan: (1) the Mortgage Loan identifying number; (2) the Mortgagor's
first and last name; (3) the street address of the Mortgaged Property including
the city, state and zip code; (4) the original principal balance of the Mortgage
Loan; (5) the Scheduled Principal Balance of the Mortgage Loan as of the close
of business on the Cut-off Date; (6) the unpaid principal balance of the
Mortgage Loan as of the close of business on the Cut-off Date; (7) the last
scheduled Due Date on which a Scheduled Payment was applied to the Scheduled
Principal Balance; (8) the last Due Date on which a Scheduled Payment was
actually applied to the unpaid principal balance; (9) the Mortgage Rate in
effect immediately following origination; (10) the Mortgage Rate in effect
immediately following the Cut-off Date (if different from (9)); (11) the amount
of the Scheduled Payment at origination; (12) the amount of the Scheduled
Payment as of the Cut-off Date (if different from (11)); (13) a code indicating
whether the Mortgaged Property is owner occupied, a second home or an investor
property; (14) a code indicating whether the Mortgaged Property is a single
family residence, a two-family residence, a three-family residence, a
four-family residence, a planned-unit development, a condominium or a
Cooperative Unit; (15) a code indicating the loan purpose (i.e., purchase,
rate/term refinance, cash-out refinance); (16) the stated maturity date; (17)
the original months to maturity; (18) the remaining months to maturity from the
Cut-off Date based on the original amortization Schedule and, if different, the
remaining months to maturity expressed in the same manner but based on the
actual amortization schedule; (19) the origination date of the Mortgage Loan;
(20) the Loan-to-Value Ratio at origination; (21) the date on which the first
Scheduled Payment was due on the Mortgage Loan after the origination date; (22)
a code indicating the documentation style of the Mortgage Loan; (23) a code
indicating if the Mortgage Loan is subject to a Primary Insurance Policy and, if
so, the name of the Qualified Mortgage Insurer, the certificate number and the
coverage amount of the Primary Insurance Policy; (24) the Servicing Fee Rate,
and if such rate is subject to change, the date such rate will change and the
Servicing Fee Rate applicable thereafter; (25) a code indicating whether the
Mortgage Loan is subject to a prepayment penalty and, if so, the term of such
prepayment penalty and whether the same shall be a Class P Prepayment Charge;
(26) the credit score (or mortgage score) of the Mortgagor; (27) the
debt-to-income ratio of the Mortgage Loan; (28) the next Adjustment Date; (29)
the lifetime mortgage rate cap; (30) the Periodic Rate Cap; (31) the maximum
interest rate; (32) the minimum interest rate; (33) a code indicating if the
Mortgage Loan is subject to a "lender-paid" Primary Insurance Policy and, if so,
the name of the Qualified Mortgage Insurer, the certificate number and the
coverage amount of the Primary Insurance Policy, and the Lender-Paid Mortgage
Insurance Rate; (34) the date on which the Mortgage Loan was transferred to the
Transferor; (35) a code indicating the Loan Group such Mortgage Loan is included
in; (36) the initial Servicer; (37) a code indicating the originator of the
Mortgage Loan; (38) a code indicating whether the Mortgage Loan is a Cooperative
Loan; (39) a code indicating whether such Mortgage Loan is an Alternate Cut-Off
Date Mortgage Loan; and (40) a code indicating whether such Mortgage Loan is a
Home Loan.

            Mortgage Loans: Such of the mortgage loans and cooperative loans
transferred and assigned to the Trustee pursuant to the provisions hereof as
from time to time are held as a part of the Trust Fund (including any REO
Property), the mortgage loans so held being identified on the Mortgage Loan
Schedule, notwithstanding foreclosure or other acquisition of title of the
related Mortgaged Property. With respect to each Mortgage Loan that is a
Cooperative Loan, if any, "Mortgage Loan" shall include, but not be limited to,
the related Mortgage Note, Security Agreement, Assignment of Proprietary Lease,
Recognition Agreement, Cooperative Shares and Proprietary Lease and, with
respect to each Mortgage Loan other than a Cooperative Loan, "Mortgage Loan"
shall include, but not be limited to the related Mortgage and the related
Mortgage Note.

            Mortgage Note: The original executed note or other evidence of the
indebtedness of a Mortgagor under a Mortgage Loan.

            Mortgage Rate: The annual rate of interest borne by a Mortgage Note
from time to time.

            Mortgaged Property: The underlying property securing a Mortgage Loan
or, with respect to a Cooperative Loan, the related Cooperative Shares and
Proprietary Lease.

            Mortgagor: The obligor(s) on a Mortgage Note.

            National City: National City Mortgage Co. and its successors and
assigns, in its capacity as servicer of the National City Mortgage Loans.

            National City Mortgage Loans: The Mortgage Loans for which National
City is listed as "Servicer" on the Mortgage Loan Schedule.

            National City Servicing Agreement: Solely with respect to the
National City Mortgage Loans, the Second Amended and Restated Master Seller's
Warranties and Servicing Agreement, dated as of May 1, 2004, between the
Transferor and National City, as the same may be amended from time to time, and
any assignments and conveyances related to the National City Mortgage Loans.

            Net Mortgage Rate: As to each Mortgage Loan, and at any time, the
per annum rate equal to the Mortgage Rate (without giving effect to any
Incremental Rate) less (i) the related Servicing Fee Rate and (ii) if
applicable, the Lender-Paid Mortgage Insurance Rate.

            Net Prepayment Interest Shortfalls: As to any Distribution Date and
Loan Group, the amount by which the aggregate of Prepayment Interest Shortfalls
for that Loan Group during the related Prepayment Period exceeds the amount of
Compensating Interest available to such Loan Group for such Distribution Date.

            Nexstar: Nexstar Financial Corporation, a Delaware corporation, and
its successors and assigns, in its capacity as servicer of the Nexstar Mortgage
Loans.

            Nexstar Mortgage Loans: The Mortgage Loans for which Nexstar is
listed as "Servicer" on the Mortgage Loan Schedule.

            Nexstar Servicing Agreement: Solely with respect to the Nexstar
Mortgage Loans, the Master Loan Purchase and Servicing Agreement, dated as of
August 1, 2002, between the Transferor and Nexstar, as amended by Amendment
Number One, dated as of November 15, 2002, as amended by Amendment Number Two,
dated as of August 1, 2003, as the same may be further amended from time to
time, and any assignment and conveyance related to the Nexstar Mortgage Loans.

            Nonrecoverable Advance: Any portion of an Advance previously made or
proposed to be made by the applicable Servicer or the Master Servicer, as the
case may be, that, in the good faith judgment of the applicable Servicer or the
Master Servicer, will not be ultimately recoverable by the applicable Servicer
or the Master Servicer from the related Mortgagor, related Liquidation Proceeds
or otherwise.

            Notice of Final Distribution: The notice to be provided pursuant to
Section 10.02 to the effect that final distribution on any of the Certificates
shall be made only upon presentation and surrender thereof.

            Notional Amount: With respect to the Class 7-A-X Certificates and
any Distribution Date, the Class Principal Balance of the Class 7-A-1
Certificates immediately prior to such Distribution Date.

            Offered Certificates: As specified in the Preliminary Statement.

            Officer's Certificate: A certificate (i) signed by the Chairman of
the Board, the Vice Chairman of the Board, the President, a Managing Director, a
Vice President (however denominated), an Assistant Vice President, the
Treasurer, the Secretary, or one of the Assistant Treasurers or Assistant
Secretaries of the Depositor or the Master Servicer, or (ii) if provided for in
this Agreement, signed by a Master Servicing Officer, as the case may be, and
delivered to the Depositor, the Trustee and the Trust Administrator, as the case
may be, as required by this Agreement.

            Opinion of Counsel: A written opinion of counsel, who may be counsel
for the Depositor or the Master Servicer, including in-house counsel, reasonably
acceptable to the Trustee or the Trust Administrator, as applicable; provided,
however, that, with respect to the interpretation or application of the REMIC
Provisions, such counsel must (i) in fact be independent of the Depositor and
the Master Servicer, (ii) not have any direct financial interest in the
Depositor or the Master Servicer or in any affiliate of either, and (iii) not be
connected with the Depositor or the Master Servicer as an officer, employee,
promoter, underwriter, trustee, partner, director or person performing similar
functions.

            Optional Termination: The termination of the Trust created hereunder
in connection with the purchase of the Mortgage Loans pursuant to Section
10.01(a) hereof.

            Original Subordinate Principal Balance: The aggregate of the Class
Principal Balances of the Subordinate Certificates as of the Closing Date.

            OTS: The Office of Thrift Supervision.

            Outstanding: With respect to the Certificates as of any date of
determination, all Certificates theretofore executed and authenticated under
this Agreement except:

            (a) Certificates theretofore canceled by the Trust Administrator or
      delivered to the Trust Administrator for cancellation; and

             (b) Certificates in exchange for which or in lieu of which other
      Certificates have been executed and delivered by the Trust Administrator
      pursuant to this Agreement.

            Outstanding Mortgage Loan: As of any Due Date, a Mortgage Loan with
a Scheduled Principal Balance greater than zero that was not the subject of a
Principal Prepayment in Full prior to such Due Date and that did not become a
Liquidated Loan prior to such Due Date.

            Ownership Interest: As to any Residual Certificate, any ownership
interest in such Certificate including any interest in such Certificate as the
Holder thereof and any other interest therein, whether direct or indirect, legal
or beneficial.

            Par Call Price: With respect to each Mortgage Loan (not including
REO Properties) to be purchased pursuant to Section 10.01(a) hereof, 100% of the
unpaid principal balance of such Mortgage Loan, plus accrued and unpaid interest
thereon at the applicable Net Mortgage Rate.

            Pass-Through Rate: For any interest bearing Class of Certificates,
the per annum rate set forth or calculated in the manner described in the
Preliminary Statement.

            Percentage Interest: As to any Certificate, the percentage interest
evidenced thereby in distributions required to be made on the related Class,
such percentage interest being set forth on the face thereof or equal to the
percentage obtained by dividing the Denomination of such Certificate by the
aggregate of the Denominations of all Certificates of the same Class.

            Periodic Rate Cap: As to each Mortgage Loan and the related Mortgage
Note, the provisions therein that limit permissible increases and decreases in
the interest rate of any Mortgage Loan on any Adjustment Date.

             Permitted Investments: At any time, any one or more of the following
obligations and securities:

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

            (b) general obligations of or obligations guaranteed by any state of
      the United States or the District of Columbia receiving the highest long
      term debt rating of each Rating Agency, or such lower rating as will not
      result in the downgrading or withdrawal of the ratings then assigned to
      the Certificates by either Rating Agency (as confirmed in writing by the
      applicable Rating Agency);

            (c) commercial or finance company paper which is then receiving the
      highest commercial or finance company paper rating of each Rating Agency,
      or such lower rating as will not result in the downgrading or withdrawal
      of the ratings then assigned to the Certificates by either Rating Agency
      (as confirmed in writing by the applicable Rating Agency);

            (d) certificates of deposit, demand or time deposits, or bankers'
      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 long term unsecured
      debt obligations of such depository institution or trust company are then
      rated in one of the two highest long term and the highest short term
      ratings of each Rating Agency for such securities, or such lower ratings
      as will not result in the downgrading or withdrawal of the rating then
      assigned to the Certificates by either Rating Agency (as confirmed in
      writing by the applicable Rating Agency);

            (e) demand or time deposits or certificates of deposit issued by any
      bank or trust company or savings institution to the extent that such
      deposits are fully insured by the FDIC and are then rated in the highest
      long term and the highest short term ratings of each Rating Agency for
      such securities, or such lower ratings as will not result in the
      downgrading or withdrawal of the ratings then assigned to the Certificates
      by either Rating Agency (as confirmed in writing by the applicable Rating
      Agency);

            (f) guaranteed reinvestment agreements issued by any bank, insurance
      company or other corporation containing, at the time of the issuance of
      such agreements, such terms and conditions as will not result in the
      downgrading or withdrawal of the rating then assigned to the Certificates
      by either Rating Agency (as confirmed in writing by the applicable Rating
      Agency);

            (g) repurchase obligations with respect to any security described in
      clauses (a) and (b) above, in either case entered into with a depository
      institution or trust company (acting as principal) described in clause (d)
      above;

            (h) securities (other than stripped bonds, stripped coupons or
      instruments sold at a purchase price in excess of 115% of the face amount
      thereof) bearing interest or sold at a discount issued by any corporation
      incorporated under the laws of the United States or any state thereof
      which, at the time of such investment, have the highest rating of each
      Rating Agency, or such lower rating as will not result in the downgrading
      or withdrawal of the rating then assigned to the Certificates by either
      Rating Agency (as confirmed in writing by the applicable Rating Agency);

            (i) units of a taxable money market portfolio having the highest
      rating assigned by each Rating Agency and restricted to obligations issued
      or guaranteed by the United States of America or entities whose
      obligations are backed by the full faith and credit of the United States
      of America and repurchase agreements collateralized by such obligations;

            (j) 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 Permitted Investments hereunder, including
      any such fund that is managed by the Trust Administrator or Master
      Servicer or any affiliate of the Trust Administrator or Master Servicer or
      for which the Trust Administrator or Master Servicer or any affiliate of
      the Trust Administrator or Master Servicer acts as an adviser as long as
      such fund is rated in at least the highest rating category by each Rating
      Agency (if so rated by such Rating Agency; provided, however, if S&P is a
      Rating Agency, then such mutual fund, money market fund, common trust fund
      or other pooled investment vehicle shall have been rated by S&P); and

            (k) such other investments bearing interest or sold at a discount
      acceptable to each Rating Agency as will not result in the downgrading or
      withdrawal of the rating then assigned to the Certificates by either
      Rating Agency, as evidenced by a signed writing delivered by each Rating
      Agency;

provided, that no such instrument shall be a Permitted Investment if such
instrument evidences the right to receive interest-only payments with respect to
the obligations underlying such instrument.

            Permitted Transferee: Any Person other than (i) the United States,
any State or political subdivision thereof, or any agency or instrumentality of
any of the foregoing, (ii) a foreign government, international organization or
any agency or instrumentality of either of the foregoing, (iii) an organization
(except certain farmers' cooperatives described in Section 521 of the Code)
which is exempt from tax imposed by Chapter 1 of the Code (including the tax
imposed by Section 511 of the Code on unrelated business taxable income) on any
excess inclusions (as defined in Section 860E(c)(l) of the Code) with respect to
any Residual Certificate, (iv) rural electric and telephone cooperatives
described in Section 1381(a)(2)(C) of the Code, (v) a Person that is not a
citizen or resident of the United States, a corporation, partnership (except as
provided in applicable Treasury Regulations), or other entity created or
organized in or under the laws of the United States or any State thereof or the
District of Columbia, an estate whose income is subject to United States federal
income tax regardless of its source or a trust if a court within the United
States is able to exercise primary supervision over the administration of the
Trust and one or more Persons described in this clause (v) have the authority to
control all substantial decisions of the Trust (or, to the extent provided in
applicable Treasury Regulations, certain trusts in existence on August 20, 1996
which are eligible to elect to be treated as United States persons) unless such
Person has furnished the transferor and the Trust Administrator with a duly
completed Internal Revenue Service Form W-8ECI or any applicable successor form,
(vi) any Person with respect to whom income on any Residual Certificate is
attributable to a foreign permanent establishment or fixed base, within the
meaning of an applicable income tax treaty, of such Person or any other Person
and (vii) any other Person so designated by the Depositor based upon an Opinion
of Counsel that the Transfer of an Ownership Interest in a Residual Certificate
to such Person may cause any REMIC hereunder to fail to qualify as a REMIC at
any time that the Certificates are outstanding. The terms "United States,"
"State" and "international organization" shall have the meanings set forth in
Section 7701 of the Code or successor provisions. A corporation will not be
treated as an instrumentality of the United States or of any State or political
subdivision thereof for these purposes if all of its activities are subject to
tax and, with the exception of Freddie Mac, a majority of its board of directors
is not selected by such government unit.

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

            PHH: PHH Mortgage Corporation (f/k/a Cendant Mortgage Corporation)
and its successors and assigns, in its capacity as Servicer of the PHH Mortgage
Loans.

            PHH Mortgage Loans: The Mortgage Loans for which PHH is listed as
"Servicer" on the Mortgage Loan Schedule.

            PHH Servicing Agreement: Solely with respect to the PHH Mortgage
Loans, the Mortgage Loan Flow Purchase, Sale and Servicing Agreement (as
successor by merger to Cendant), dated as of August 1, 2001, between the
Transferor, as purchaser, and PHH, as seller and as servicer, as amended by
Amendment No. 1, dated as of November 28, 2001, Amendment No. 2, dated as of
November 15, 2002, and as the same may be further amended from time to time, and
any term sheets related to the PHH Mortgage Loans.

            Physical Certificate: As specified in the Preliminary Statement.

            Pledge Instruments: With respect to each Cooperative Loan, the Stock
Power, the Assignment of Proprietary Lease and the Security Agreement.

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

            Prepayment Interest Excess: As to any Principal Prepayment received
or, in the case of partial Principal Prepayments, applied by the applicable
Servicer or the Master Servicer from the first day through the fifteenth day of
any calendar month (other than the calendar month in which the Cut-off Date
occurs), all amounts paid by the related Mortgagor in respect of interest on
such Principal Prepayment.

            Prepayment Interest Shortfall: As to any Distribution Date, Mortgage
Loan and Principal Prepayment received or, in the case of partial Principal
Prepayments, applied, during the applicable Prepayment Period (except with
respect to any WMMSC Mortgage Loan for which a Principal Prepayment in Full or a
Recovery is received by WMMSC on or after the 1st day and prior to the 15th day
of the month in which such Distribution Date occurs), the amount, if any, by
which one month's interest at the related Net Mortgage Rate on such Principal
Prepayment exceeds the amount of interest at the Net Mortgage Rate paid in
connection with such Principal Prepayment.

            Prepayment Period: As to any Distribution Date, (a) with respect to
any voluntary Principal Prepayment of a Mortgage Loan (other than any voluntary
Principal Prepayment in Full of a WMMSC Mortgage Loan or a Recovery with respect
to a WMMSC Mortgage Loan) the calendar month preceding the month in which such
Distribution Date occurs; and (b) with respect to any Principal Prepayment in
Full of a WMMSC Mortgage Loan or a Recovery with respect to a WMMSC Mortgage
Loan, the period beginning on the 15th day of the calendar month immediately
preceding the month in which such Distribution Date occurs and ending on the
14th day of the calendar month in which such Distribution Date occurs.

            Primary Insurance Policy: Each policy of primary mortgage guaranty
insurance or any replacement policy with respect to any Mortgage Loan.

            Principal Prepayment: Any payment of principal by a Mortgagor on a
Mortgage Loan that is received in advance of its scheduled Due Date, excluding
any prepayment penalty or premium thereon, and is not accompanied by an amount
representing scheduled interest due on any date or dates in any month or months
subsequent to the month of prepayment. Partial Principal Prepayments will be
applied by the applicable Servicers in accordance with the terms of the related
Servicing Agreements and in accordance with the terms of the related Mortgage
Note, and to the extent the Mortgage Note does not provide otherwise, shall be
applied in the Prepayment Period preceding the receipt thereof.

            Principal Prepayment in Full: Any Principal Prepayment made by a
Mortgagor of the entire principal balance of a Mortgage Loan.

            Private Certificate: As specified in the Preliminary Statement.

            Pro Rata Share: As to any Distribution Date and any Mortgage Loan
(i) with respect to any Senior Certificate for which such Mortgage Loan is not
in the Related Loan Group, zero, and (ii) with respect to each other Class of
Senior Certificates as to which such Mortgage Loan is in the Related Loan Group,
and each Class of Subordinate Certificates, the ratio that the amount calculated
with respect to such Distribution Date for such Class pursuant to clause (i) of
the definition of Accrued Certificate Interest (without giving effect to any
reduction of such amount pursuant to Section 4.02(c)) bears to the amount
calculated with respect to such Distribution Date for all such Classes of Senior
Certificates and for all Classes of Subordinate Certificates pursuant to clause
(i) of the definition of Accrued Certificate Interest (without giving effect to
any reduction of such amount pursuant to Section 4.02(c)); provided, however,
that with respect to the calculation in (ii) above, such calculation with
respect to the Subordinate Certificates shall be made as though each Class of
Subordinate Certificates had a Class Principal Balance equal to its pro rata
share (based on Class Principal Balance) of the Group Subordinate Amount for the
Group which includes such Mortgage Loan, and provided, further, that, in the
event the Pro Rata Share for any Class of Senior Certificates as so calculated
exceeds the portion of the Accrued Certificate Interest for such Class in
accordance with clause (i) of the definition thereof without adjustment for
Section 4.02(c) other than reduction for Net Prepayment Interest Shortfalls, the
amount of such excess shall be allocated pro rata to all other Classes of Senior
Certificates based on Accrued Certificate Interest pursuant to such clause (i)
without adjustment pursuant to Section 4.02(c), and shall be treated as the Pro
Rata Share of each such Class.

            Proprietary Lease: The lease on a Cooperative Unit evidencing the
possessory interest of the owner of the Cooperative Shares in such Cooperative
Unit.

            Prospectus Supplement: The Prospectus Supplement dated February 22,
2005 relating to the Offered Certificates.

            Protected Account: An account established and maintained for the
benefit of Certificateholders by each Servicer with respect to the related
Mortgage Loans and with respect to REO Property pursuant to the respective
Servicing Agreements. Each Protected Account is required to be an Eligible
Account.

            Provident: Provident Funding Associates, L.P. and its successors and
assigns, in its capacity as servicer of the Provident Mortgage Loans.

            Provident Mortgage Loans: The Mortgage Loans for which Provident is
listed as "Servicer" in the Mortgage Loan Schedule.

            Provident Servicing Agreement: Solely with respect to the Provident
Mortgage Loans, the Master Loan Purchase and Servicing Agreement, dated as of
August 1, 2002, between the Transferor and Provident, as amended by Amendment
Number One, dated as of November 15, 2002, as amended by Amendment Number Two,
dated as of August 1, 2003, as the same may be further amended from time to
time, and any assignment and conveyance related to the Provident Mortgage Loans.

            Purchase Price: With respect to any Mortgage Loan required to be
purchased by the Transferor pursuant to Section 2.02 or 2.03 hereof, an amount
equal to (A) the sum of (i) 100% of the unpaid principal balance of the Mortgage
Loan on the date of such purchase, (ii) accrued and unpaid interest thereon at
the applicable Mortgage Rate from the date through which interest was last paid
by the Mortgagor or the applicable Servicer or the Master Servicer, as the case
may be, made an Advance in respect thereof (which was not reimbursed) to the Due
Date in the month in which the Purchase Price is to be distributed to
Certificateholders, (iii) in the event that such Mortgage Loan is repurchased by
the Transferor due to a breach of the representations and warranties listed in
clauses (xiii) or (xiv) of Schedule II to this Agreement, any costs and damages
incurred by the Trust in connection with a violation of a predatory or abusive
lending law with respect to such Mortgage Loan, less (B) any Amounts Held for
Future Distribution related to such Mortgage Loan with respect to the
Distribution Date in the month in which the Purchase Price is to be distributed
to Certificateholders.

            Qualified Mortgage Insurer: Any mortgage insurer that is Fannie Mae
and Freddie Mac approved.

            Rating Agency: Each of the Rating Agencies specified in the
Preliminary Statement. If any such organization or a successor is no longer in
existence, "Rating Agency" shall be such nationally recognized statistical
rating organization, or other comparable Person, as is designated by the
Depositor, notice of which designation shall be given to the Trustee and the
Trust Administrator. References herein to a given rating category of a Rating
Agency shall mean such rating category without giving effect to any modifiers.

            Realized Loss: With respect to each Liquidated Loan, an amount (not
less than zero or more than the Scheduled Principal Balance of the Mortgage
Loan) as of the date of such liquidation, equal to (i) the unpaid principal
balance of the Liquidated Loan as of the date of such liquidation, plus (ii)
interest at the Net Mortgage Rate from the Due Date as to which interest was
last paid or advanced (and not reimbursed) to Certificateholders up to the Due
Date in the month in which Liquidation Proceeds are required to be distributed
on the Scheduled Principal Balance of such Liquidated Loan from time to time,
minus (iii) the Liquidation Proceeds, if any, received during the month in which
such liquidation occurred, to the extent applied as recoveries of interest at
the Net Mortgage Rate and to principal of the Liquidated Loan. With respect to
each Mortgage Loan that has become the subject of a Deficient Valuation, if the
principal amount due under the related Mortgage Note has been reduced, the
difference between the principal balance of the Mortgage Loan outstanding
immediately prior to such Deficient Valuation and the principal balance of the
Mortgage Loan as reduced by the Deficient Valuation.

            Recognition Agreement: An Agreement among a Cooperative Corporation,
a lender and a Mortgagor with respect to a Cooperative Loan whereby such parties
(i) acknowledge that such lender may make, or intends to make, such Cooperative
Loan and (ii) make certain agreements with respect to such Cooperative Loan.

            Record Date: With respect to any Distribution Date and any Class of
Certificates, the last Business Day of the month immediately preceding the month
in which the related Distribution Date occurs.

            Recovery: With respect to any Distribution Date and any Mortgage
Loan, an amount, net of any reimbursable expenses, received in respect of
principal on such Mortgage Loan during the related Prepayment Period which has
previously been allocated as a Realized Loss to a Class of Certificates.

            Refinancing Mortgage Loan: Any Mortgage Loan originated in
connection with the refinancing of an existing mortgage loan.

            Regular Certificates: As specified in the Preliminary Statement.

            Related Loan Group: With respect to the Group 1 Certificates and the
Class L-1B Interest and Class L-1Q Interest, Loan Group 1; with respect to the
Group 2 Certificates and the Class L-2B Interest and Class L-2Q Interest, Loan
Group 2; with respect to the Group 3 Certificates and the Class L-3B Interest
and Class L-3Q Interest, Loan Group 3; with respect to the Group 4 Certificates
and the Class L-4B Interest and Class L-4Q Interest, Loan Group 4; with respect
to the Group 5 Certificates and the Class L-5B Interest and Class L-5Q Interest,
Loan Group 5; with respect to the Group 6 Certificates and the Class L-6B
Interest and Class L-6Q Interest, Loan Group 6; and with respect to the Group 7
Certificates and the Class L-7B Interest and Class L-7Q Interest, Loan Group 7.

            Relief Act: The Servicemembers Civil Relief Act, or any comparable
state or local statute (including the comparable provisions under the California
Military and Veterans Code, as amended).

            Relief Act Reduction: With respect to any Distribution Date and any
Mortgage Loan as to which there has been a reduction in the amount of interest
collectible thereon for the most recently ended calendar month as a result of
the application of the Relief Act, the amount, if any, by which (i) interest
collectible on such Mortgage Loan for the most recently ended calendar month is
less than (ii) interest accrued thereon for such month pursuant to the Mortgage
Note.

            REMIC: A "real estate mortgage investment conduit" within the
meaning of Section 860D of the Code.

            REMIC Provisions: Provisions of the federal income tax law relating
to real estate mortgage investment conduits, which appear at Sections 860A
through 860G of Subchapter M of Chapter 1 of the Code, and related provisions,
and regulations promulgated thereunder, as the foregoing may be in effect from
time to time as well as provisions of applicable state laws.

            REO Property: A Mortgaged Property acquired by the Trust Fund
through foreclosure, deed-in-lieu of foreclosure, repossession or otherwise in
connection with a defaulted Mortgage Loan.

            Required Insurance Policy: With respect to any Mortgage Loan, any
insurance policy that is required to be maintained from time to time under the
applicable Servicing Agreement.

            Residual Certificates: As specified in the Preliminary Statement.

            Responsible Officer: When used with respect to the Trustee or the
Trust Administrator, any Director, any Managing Director, any Associate, any
Vice President, any Assistant Vice President, the Secretary, any Assistant
Secretary, any Trust Officer or any other officer of the Trustee or Trust
Administrator, as applicable, customarily performing functions similar to those
performed by any of the above designated officers having direct responsibility
for the administration of this Agreement and also to whom, with respect to a
particular matter, such matter is referred because of such officer's knowledge
of and familiarity with the particular subject.

            Restricted Classes: As defined in Section 4.02(d).

            S&P: Standard and Poor's Ratings Services, a division of The McGraw
Hill Companies, Inc., or any successor thereto. If S&P is designated as a Rating
Agency in the Preliminary Statement, for purposes of Section 11.05(b) the
address for notices to S&P shall be Standard and Poor's Ratings Services, a
division of The McGraw Hill Companies, Inc., 55 Water Street, New York, New York
10041, Attention: Residential Mortgage Monitoring Group, or such other address
as S&P may hereafter furnish to each party to this Agreement.

            Scheduled Payment: The scheduled monthly payment on a Mortgage Loan
due on any Due Date allocable to principal and/or interest on such Mortgage Loan
which, unless otherwise specified herein, shall give effect to any related Debt
Service Reduction and any Deficient Valuation that affects the amount of the
monthly payment due on such Mortgage Loan.

             Scheduled Principal Balance: As to any Mortgage Loan and any
Distribution Date, the unpaid principal balance of such Mortgage Loan as of the
Due Date in the month preceding the month in which such Distribution Date
occurs, as specified in the amortization Schedule at the time relating thereto
(before any adjustment to such amortization Schedule by reason of any moratorium
or similar waiver or grace period) after giving effect to any previous partial
Principal Prepayments and Liquidation Proceeds allocable to principal received
during the Prepayment Period for the prior Distribution Date (other than with
respect to any Liquidated Loan), and to the payment of principal due on such Due
Date and irrespective of any delinquency in payment by the related Mortgagor.
The Scheduled Principal Balance of any Mortgage Loan that has been prepaid in
full or has become a Liquidated Loan during the related Prepayment Period shall
be zero.

            Securities Act: The Securities Act of 1933, as amended.

             Security Agreement: With respect to a Cooperative Loan, the
agreement or mortgage creating a security interest in favor of the originator of
the Cooperative Loan in the related Cooperative Shares.

            Senior Certificates: As specified in the Preliminary Statement.

            Senior Final Distribution Date: The Distribution Date on which the
respective Class Principal Balances of the Senior Certificates (other than the
Interest-Only Certificates) have each been reduced to zero.

            Senior Optimal Principal Amount: For any Distribution Date and any
Loan Group, the sum for all Mortgage Loans in such Loan Group of (i) the Senior
Percentage of (a) the principal portion of each Scheduled Payment (without
giving effect, prior to the Bankruptcy Coverage Termination Date, to any
reductions thereof caused by any Debt Service Reductions or Deficient
Valuations) due on each such Mortgage Loan on the related Due Date, (b) the
principal portion of the Purchase Price of each such Mortgage Loan to the extent
it was repurchased by the Transferor pursuant to this Agreement as of such
Distribution Date, (c) the Substitution Adjustment Amount in connection with any
Deleted Mortgage Loan related to such Loan received with respect to such
Distribution Date and (d) any Liquidation Proceeds (including Insurance
Proceeds) allocable to recoveries of principal of any Mortgage Loan related to
such Loan Group that is not yet a Liquidated Loan, received during the calendar
month preceding the month of such Distribution Date, (ii) with respect to each
such Mortgage Loan in such Loan Group that became a Liquidated Loan during the
calendar month preceding the month of such Distribution Date, the lesser of (a)
the Senior Percentage of the Scheduled Principal Balance of such Mortgage Loan,
and (b) either (A) the Senior Prepayment Percentage, or (B) if an Excess Loss
was sustained with respect to such Liquidated Loan during such prior calendar
month, the Senior Percentage of the amount of the Liquidation Proceeds allocable
to principal received with respect to such Mortgage Loan, (iii) the Senior
Prepayment Percentage of the sum of (a) all Principal Prepayments in Full of
Mortgage Loans in such Loan Group received during the related Prepayment Period
and (b) all partial Principal Prepayments of Mortgage Loans in such Loan Group
and applied during the related Prepayment Period and (iv) with respect to any
Distribution Date prior to the Cross-Over Date only, the Senior Prepayment
Percentage of the Recoveries for such Loan Group received during the related
Prepayment Period; provided, however, that, if a Bankruptcy Loss that is an
Excess Loss is sustained with respect to such Mortgage Loan that is not a
Liquidated Loan, the Senior Optimal Principal Amount will be reduced on the
related Distribution Date by the Senior Percentage of the principal portion of
such Bankruptcy Loss.

            Senior Percentage: With respect to any Certificate Group and any
Distribution Date, the lesser of (i) 100% and (ii) the percentage obtained by
dividing (a) the aggregate Certificate Principal Balances of all the Senior
Certificates (other than the Interest-Only Certificates) in the related
Certificate Group immediately preceding such Distribution Date by (b) the sum of
(1) the aggregate Certificate Principal Balances of all the Senior Certificates
(other than the Interest-Only Certificates) in the related Certificate Group and
(2) the Group Subordinate Amount for the related Certificate Group, in both
cases immediately preceding such Distribution Date.

            Senior Prepayment Percentage: With respect to any Certificate Group
and any Distribution Date, the percentages (not exceeding 100%) set forth in the
following table:

      Distribution Date Occurring               Senior Prepayment Percentage
--------------------------------------    ---------------------------------------
March 2005 through February 2012......    100%
March 2012 through February 2013......    Senior Percentage of such Certificate
                                         Group plus 70% of the related
                                         Subordinate Percentage
March 2013 through February 2014......    Senior Percentage of such Certificate
                                         Group plus 60% of the related
                                          Subordinate Percentage
March 2014 through February 2015......    Senior Percentage of such Certificate
                                         Group plus 40% of the related
                                         Subordinate Percentage
March 2015 through February 2016......    Senior Percentage of such Certificate
                                         Group plus 20% of the related
                                         Subordinate Percentage
after February 2016...................    Senior Percentage of such Certificate
                                         Group

provided, however, (i) if on any Distribution Date the Senior Percentage for
such Certificate Group exceeds the initial Senior Percentage for such
Certificate Group, the Senior Prepayment Percentage for all Groups for such
Distribution Date will equal 100%, (ii) if on any Distribution Date on or before
the Distribution Date in February 2008, prior to giving effect to any
distributions on such Distribution Date, the Aggregate Subordinate Percentage
for such Distribution Date is greater than or equal to twice the initial
Aggregate Subordinate Percentage, then the Senior Prepayment Percentage for such
Certificate Group for such Distribution Date will equal the Senior Percentage
for such Certificate Group plus 50% of the Subordinate Percentage for such
Certificate Group and (iii) if on any Distribution Date on or after the
Distribution Date in March 2008, prior to giving effect to any distributions on
such Distribution Date, the Aggregate Subordinate Percentage for such
Distribution Date is greater than or equal to twice the initial Aggregate
Subordinate Percentage, then the Senior Prepayment Percentage for such
Certificate Group for such Distribution Date will equal the Senior Percentage
for such Certificate Group. Notwithstanding the foregoing, no decrease in the
Senior Prepayment Percentage for a Certificate Group will occur unless both of
the Senior Step Down Conditions are satisfied.

            Senior Step Down Conditions: As of the last day of the month
preceding the applicable Distribution Date as to which any decrease in the
Senior Prepayment Percentage applies, (i) the aggregate Scheduled Principal
Balance of all Mortgage Loans delinquent 60 days or more (including delinquent
Mortgage Loans in bankruptcy, and all Mortgage Loans in foreclosure and REO
Properties), as a percentage of the aggregate Class Principal Balance of the
Subordinate Certificates on such Distribution Date, does not equal or exceed 50%
and (ii) cumulative Realized Losses with respect to the Mortgage Loans do not
exceed (a) with respect to the Distribution Dates occurring between and
including March 2005 and February 2008, 20% of the Original Subordinate
Principal Balance, (b) with respect to the Distribution Date on or after March
2008, 30% of the Original Subordinate Principal Balance.

            Servicer: Each of Countrywide, GMAC, GreenPoint, National City, PHH,
Provident, Nexstar, Wachovia Mortgage and Wells Fargo, as applicable.

            Servicer Remittance Date: With respect to any Servicer (other than
WMMSC) and any Distribution Date, the 18th day of each calendar month, or if
such 18th day is not a Business Day, either the immediately preceding Business
Day or the immediately succeeding Business Day, as specified in the related
Servicing Agreement. With respect to WMMSC, as to any Distribution Date, the
24th day of each calendar month, or if such 24th day is not a Business Day, the
immediately preceding Business Day.

            Servicing Advances: All customary, reasonable and necessary "out of
pocket" costs and expenses incurred in the performance by the Master Servicer of
its master servicing obligations or the applicable Servicer, as the case may be,
of its servicing obligations, including, but not limited to, the cost of (i) the
preservation, restoration and protection of a Mortgaged Property, (ii) any
expenses reimbursable to the Master Servicer or the applicable Servicer, as the
case may be, pursuant to Section 3.11 and any enforcement or judicial
proceedings, including foreclosures, (iii) the management and liquidation of any
REO Property and (iv) compliance with the obligations under Section 3.09.

            Servicing Agreements:

            (a) the Countrywide Servicing Agreement;

            (b) the GMAC Servicing Agreement;

            (c) the GreenPoint Servicing Agreement;

            (d) the National City Servicing Agreement;

            (e) the PHH Servicing Agreement;

            (f) the Provident Servicing Agreement;

            (g) the Nexstar Servicing Agreement;

            (h) the Wachovia Mortgage Servicing Agreement; and

            (i) the Wells Fargo Servicing Agreement.

            Servicing Fee: As to each Mortgage Loan and any Distribution Date,
an amount payable out of each full payment of interest received on such Mortgage
Loan and equal to one twelfth of the Servicing Fee Rate multiplied by the
Scheduled Principal Balance of such Mortgage Loan as of the Due Date in the
month immediately preceding the month in which such Distribution Date occurs
(after giving effect to any Scheduled Payments due on such Mortgage Loan on such
Due Date), subject to reduction for any Compensating Interest payments required
to be made by the applicable Servicer.

             Servicing Fee Rate: With respect to each Mortgage Loan, the per
annum rate set forth on the Mortgage Loan Schedule.

            Similar Law: As defined in Section 5.02(b) hereof.

            Special Hazard Coverage Termination Date: The point in time at which
the Special Hazard Loss Coverage Amount is reduced to zero.

            Special Hazard Loss: Any Realized Loss as reported by the applicable
Servicer to the Master Servicer suffered by a Mortgaged Property on account of
direct physical loss but not including (i) any loss of a type covered by a
hazard insurance policy or a flood insurance policy required to be maintained
with respect to such Mortgaged Property pursuant to Section 3.11 to the extent
of the amount of such loss covered thereby, or (ii) any loss caused by or
resulting from:

            (a) normal wear and tear;

            (b) fraud, conversion or other dishonest act on the part of the
      Trustee, the Trust Administrator, any Servicer, the Master Servicer or any
      of their agents or employees (without regard to any portion of the loss
      not covered by any errors and omissions policy);

            (c) errors in design, faulty workmanship or faulty materials, unless
      the collapse of the property or a part thereof ensues and then only for
      the ensuing loss;

            (d) nuclear or chemical reaction or nuclear radiation or radioactive
      or chemical contamination, all whether controlled or uncontrolled, and
      whether such loss be direct or indirect, proximate or remote or be in
      whole or in part caused by, contributed to or aggravated by a peril
      covered by the definition of the term "Special Hazard Loss";

            (e) hostile or warlike action in time of peace and war, including
      action in hindering, combating or defending against an actual, impending
      or expected attack:

                  (i) by any government or sovereign power, de jure or de facto,
            or by any authority maintaining or using military, naval or air
             forces; or

                  (ii) by military, naval or air forces; or

                  (iii) by an agent of any such government, power, authority or
            forces;

            (f) any weapon of war employing nuclear fission, fusion or other
radioactive force, whether in time of peace or war; or

            (g) insurrection, rebellion, revolution, civil war, usurped power or
action taken by governmental authority in hindering, combating or defending
against such an occurrence, seizure or destruction under quarantine or customs
regulations, confiscation by order of any government or public authority or
risks of contraband or illegal transportation or trade.

            Special Hazard Loss Coverage Amount: With respect to any
Distribution Date, $6,836,646 less (i) the aggregate amount of Special Hazard
Losses that would have been previously allocated to the Subordinate Certificates
in the absence of the Loss Allocation Limitation and (ii) the Adjustment Amount
as of the most recent anniversary of February 1, 2005. As of any Distribution
Date after the Cross-Over Date, the Special Hazard Loss Coverage Amount for such
Subordinate Certificates shall be zero. All principal balances for the purpose
of this definition will be calculated as of the first day of the calendar month
preceding the month of such Distribution Date after giving effect to Scheduled
Payments on the Mortgage Loans then due, whether or not paid.

            Special Hazard Mortgage Loan: A Liquidated Loan as to which a
Special Hazard Loss has occurred.

            Standard & Poor's Glossary: The Standard & Poor's LEVELS(R)
Glossary, as may be in effect from time to time.

            Startup Day: The Closing Date.

            Stock Power: With respect to a Cooperative Loan, an assignment of
the stock certificate or an assignment of the Cooperative Shares issued by the
Cooperative Corporation.

            Subordinate Certificates: As specified in the Preliminary Statement.

            Subordinate Certificates Fractional Interest Test: This test is
satisfied with respect to a Class of Subordinate Certificates and any
Distribution Date if (a) on any Distribution Date on or prior to the
Distribution Date in February 2008, the Fractional Interest of such Class is
greater than or equal to twice its Fractional Interest on the Closing Date and
(b) the Senior Prepayment Percentage for such Distribution Date is determined in
accordance with clause (ii) or (iii) of the proviso in the definition of "Senior
Prepayment Percentage."

            Subordinate Optimal Principal Amount: For any Distribution Date and
any Loan Group, the sum for each Mortgage Loan in such Loan Group of (i) the
Subordinate Percentage of (a) the principal portion of each Scheduled Payment
(without giving effect, prior to the Bankruptcy Coverage Termination Date, to
any reductions thereof caused by any Debt Service Reductions or Deficient
Valuations) due on each such Mortgage Loan on the related Due Date, (b) the
principal portion of the Purchase Price of each such Mortgage Loan to the extent
it was repurchased by the Transferor pursuant to this Agreement as of such
Distribution Date, (c) the Substitution Adjustment Amount in connection with any
Deleted Mortgage Loan related to such Loan Group received with respect to such
Distribution Date, (d) any Liquidation Proceeds (including Insurance Proceeds)
allocable to recoveries of principal of Mortgage Loans related to such Loan
Group that are not yet Liquidated Loans, received during the calendar month
preceding the month of such Distribution Date, (ii) with respect to each
Mortgage Loan in such Loan Group that became a Liquidated Loan during the
calendar month preceding the month of such Distribution Date, the portion of the
amount of the Liquidation Proceeds allocable to principal received with respect
to such Mortgage Loan that was not included in clause (ii) of the definition of
"Senior Optimal Principal Amount" for such Distribution Date, (iii) the
Subordinate Prepayment Percentage of the sum of (a) all Principal Prepayments in
Full of Mortgage Loans in such Loan Group received during the related Prepayment
Period and (b) all partial Principal Prepayments of Mortgage Loans in such Loan
Group and applied during the related Prepayment Period and (iv) with respect to
any Distribution Date prior to the Cross-Over Date only, the Subordinate
Prepayment Percentage related to such Group of the Recoveries received during
the related Prepayment Period; provided, however, that if a Bankruptcy Loss that
is an Excess Loss is sustained with respect to a Mortgage Loan in such Loan
Group that is not a Liquidated Loan, the Subordinate Optimal Principal Amount
will be reduced on the related Distribution Date by the Subordinate Percentage
of the principal portion of such Bankruptcy Loss.

             Subordinate Percentage: As to any Distribution Date and any
Certificate Group, 100% minus the Senior Percentage for such Certificate Group
for such Distribution Date.

            Subordinate Prepayment Percentage: As to any Distribution Date and
any Certificate Group, 100% minus the Senior Prepayment Percentage for such
Certificate Group for such Distribution Date, except that, on any Distribution
Date after the Senior Final Distribution Date for any Certificate Group, the
Subordinate Prepayment Percentage for such Certificate Group will equal 100%.

            Subordinate Principal Distribution Amount: With respect to the
Subordinate Certificates, the aggregate amount that would be payable as
principal on such Subordinate Certificates from Available Funds for the Loan
Groups in the aggregate, after application of Available Funds for each such Loan
Group (i) to make payments on the related Senior Certificates in accordance with
Section 4.02(a)(i) items first and second and Section 4.02(e) and (ii) to make
payments of Accrued Certificate Interest to the Subordinate Certificates in
accordance with Section 4.02(a)(ii).

            Substitution Adjustment Amount: The meaning ascribed to such term
pursuant to Section 2.03.

            Tax Matters Person: The Holder of (i) the Class A-LR and (ii) the
Class A-UR Certificates designated as "tax matters person" of (x) the Lower-Tier
REMIC and (y) the Middle-Tier REMIC and Upper-Tier REMIC, respectively, in the
manner provided under Treasury Regulations Section 1.860F-4(d) and Treasury
Regulations Section 301.6231(a)(7)-1.

            Transfer: Any direct or indirect transfer or sale of any Ownership
Interest in a Residual Certificate.

            Transferor: UBS Real Estate Securities Inc., a Delaware corporation,
seller of the Mortgage Loans to the Depositor pursuant to the Mortgage Loan
Purchase Agreement.

            Trust: As defined in Section 2.01(c).

            Trust Administrator: Wells Fargo, in its capacity as Trust
Administrator.

            Trust Administrator Compensation: All investment earnings on amounts
on deposit in the Distribution Account (other than the WMMSC Investment Earnings
Amount).

            Trust Fund: The corpus of the trust created hereunder consisting of
(i) the Mortgage Loan Purchase Agreement, the Servicing Agreements solely as
each such Servicing Agreement relates to the Mortgage Loans being serviced by
the related Servicer (other than those rights under the Servicing Agreements
that do not relate to the servicing of the Mortgage Loans (including, without
limitation, the representations and warranties made by the applicable Servicers
(with respect to the Mortgage Loans sold to the Transferor) and the document
delivery requirements of such Servicer and the remedies (including
indemnification) available for breaches thereto), which rights were retained by
the Transferor pursuant to the Assignment Agreements); (ii) the Mortgage Loans
and all interest and principal received on or with respect thereto after the
Cut-off Date to the extent not applied in computing the Cut-off Date Principal
Balance thereof; (iii) the Collection Account and the Distribution Account and
all amounts deposited therein pursuant to the applicable provisions of this
Agreement; (iv) property that secured a Mortgage Loan and has been acquired by
foreclosure, deed-in-lieu of foreclosure or otherwise; and (v) all proceeds of
the conversion, voluntary or involuntary, of any of the foregoing.

            Trust REMIC: Any of the Lower-Tier REMIC, Middle-Tier REMIC and the
Upper-Tier REMIC created hereunder.

            Trustee: JPMorgan Chase Bank, N.A., a banking association organized
under the laws of the United States, and its successors and, if a successor
trustee is appointed hereunder, such successor.

             Undercollateralized Group: Any Certificate Group, as to which, on
any Distribution Date, the aggregate Class Principal Balance of the Senior
Certificates related to such Certificate Group of which (after giving effect to
distributions to be made on such Distribution Date) is greater than the Group
Pool Principal Balance of the related Loan Group for the following Distribution
Date.

            Upper-Tier REMIC: As described in the Preliminary Statement.

            Voting Rights: The portion of the voting rights of all of the
Certificates that is allocated to any Certificate. As of any date of
determination, (a) 1% of all Voting Rights shall be allocated to the Class P
Certificates and 1% of all Voting Rights shall be allocated to the Interest-Only
Certificates and (b) the remaining Voting Rights (and the Voting Rights
allocated to the Interest-Only Certificates if there are no Interest-Only
Certificates) shall be allocated among Holders of the remaining Classes of
Certificates in proportion to the Certificate Principal Balances of their
respective Certificates on such date. The Voting Rights allocated to a Class of
Certificates will be allocated among all Holders of that Class in proportion to
the respective outstanding Certificate Principal Balances, or Percentage
Interest, of those Certificates.

            Wachovia Mortgage: Wachovia Mortgage Corporation and its successors
and assigns, in its capacity as Servicer of the Wachovia Mortgage Loans.

            Wachovia Mortgage Mortgage Loans: The Mortgage Loans for which
Wachovia Mortgage is listed as "Servicer" on the Mortgage Loan Schedule.

            Wachovia Mortgage Servicing Agreement: Solely with respect to the
Wachovia Mortgage Mortgage Loans, the Master Loan Purchase and Servicing
Agreement, dated as of July 1, 2004, as the same may be amended from time to
time, and any assignments and conveyances related to the Wachovia Mortgage
Mortgage Loans.

            Wells Fargo: Wells Fargo Bank, N.A. and its successors and assigns,
in its capacity as Master Servicer, as Servicer of the Wells Fargo Serviced
Mortgage Loans, Trust Administrator or Custodian, as the case may be, hereunder.

            Wells Fargo Serviced Mortgage Loans: The Mortgage Loans for which
Wells Fargo is listed as "Servicer" on the Mortgage Loan Schedule.

            Wells Fargo Servicing Agreements: Solely with respect to the Wells
Fargo Serviced Mortgage Loans, the Seller's Warranties and Servicing Agreement,
dated as of November 1, 2004, between the Transferor and Wells Fargo, as such
may be amended from time to time, and any assignments and conveyances relating
to the Wells Fargo Serviced Mortgage Loans.

            WMMSC: Washington Mutual Mortgage Securities Corp. and its
successors and assigns, in its capacity as Servicer of the WMMSC Mortgage Loans.

            WMMSC Investment Earnings Amount: With respect to any Distribution
Date, an amount equal to the investment earnings, if any, that accrued on
amounts then held in the Distribution Account in respect of the WMMSC Monthly
Remittance Amount, for the period from and including the Servicer Remittance
Date immediately preceding such Distribution Date, to and including such
Distribution Date.

            WMMSC Monthly Remittance Amount: With respect to any Distribution
Date and any WMMSC Mortgage Loans, an amount equal to the funds that WMMSC
withdrew from its Protected Account and remitted to the Trust Administrator on
the Servicer Remittance Date immediately preceding such Distribution Date in
respect of any of the items listed in sub-clauses (i) through (vii) of Section
2.6(b) of the WMMSC Servicing Agreement.

            WMMSC Mortgage Loans: The Mortgage Loans for which WMMSC is listed
as "Servicer" on the Mortgage Loan Schedule. There are no WMMSC Mortgage Loans
in the Trust.

            WMMSC Servicing Agreement: The Servicing Agreement, dated as of
August 1, 2002, between the Transferor and WMMSC, as amended by Amendment Number
One, dated November 1, 2002, as further amended by Amendment Number Two, dated
January 1, 2003, and as the same may be amended further from time to time.

            Section 1.02 Certain Calculations. Unless otherwise specified
herein, for purposes of determining amounts with respect to the Certificates and
the rights and obligations of the parties hereto, all calculations of interest
(other than as provided in the Mortgage Loan documents) provided for herein
shall be made on the basis of a 360 day year consisting of twelve 30 day months.

                                   ARTICLE II

                           CONVEYANCE OF MORTGAGE LOANS;
                         REPRESENTATIONS AND WARRANTIES

            Section 2.01 Conveyance of Mortgage Loans. (a) The Depositor,
concurrently with the execution and delivery hereof, hereby sells, transfers,
assigns, sets over and otherwise conveys to the Trustee for the benefit of the
Certificateholders, without recourse, all the right, title and interest of the
Depositor in and to the Trust Fund together with all rights assigned by the
Transferor to the Depositor, pursuant to the Mortgage Loan Purchase Agreement,
solely with respect to the Mortgage Loans, and, solely with respect to the
Mortgage Loans, all of the Transferor's right, title and interest in and to the
Servicing Agreements solely as each such Servicing Agreement relates to the
Mortgage Loans being serviced by the related Servicer (other than those rights
under the Servicing Agreements that do not relate to servicing of the Mortgage
Loans (including, without limitation, the representations and warranties made by
each Servicer (in its capacity as loan seller to the Transferor) and the
document delivery requirements of such Servicer and the remedies (including
indemnification) available for breaches thereto), which rights were retained by
the Transferor pursuant to the Assignment Agreements). In connection with the
foregoing assignments, the Transferor has caused each Servicer to enter into the
related Assignment Agreement.

            (b)    (i) In connection with the transfer and assignment set forth
forth in clause (a) above, the Depositor has delivered or caused to be delivered
to the Custodian, on behalf of the Trustee, for the benefit of the
Certificateholders the following documents or instruments with respect to each
Mortgage Loan that is not a Cooperative Loan so assigned:

                  (A) the original Mortgage Note endorsed by manual or facsimile
            signature in blank in the following form: "Pay to the order of
            _________ without recourse," with all intervening endorsements
            showing a complete chain of endorsement from the originator to the
            Person endorsing the Mortgage Note (each such endorsement being
            sufficient to transfer all right, title and interest of the party so
             endorsing, as noteholder or assignee thereof, in and to that
            Mortgage Note); or, with respect to any Lost Mortgage Note, a lost
            note affidavit from the related originator or the Transferor stating
            that the original Mortgage Note was lost or destroyed, together with
            a copy of such Mortgage Note;

                  (B) except as provided below, the original recorded Mortgage
            or a copy of such Mortgage certified by the related originator as
             being a true and complete copy of the Mortgage;

                  (C) a duly executed assignment of the Mortgage (which may be
            included in a blanket assignment or assignments), endorsed in the
            following form: "JPMorgan Chase Bank, N.A., in trust for the MASTR
            Adjustable Rate Mortgages Trust 2005-2 for the benefit of the
            Holders of the Mortgage Pass-Through Certificates, Series 2005-2"
            together with, except as provided below, all interim recorded
            assignments of such mortgage (each such assignment, when duly and
            validly completed, to be in recordable form and sufficient to effect
            the assignment of and transfer to the assignee thereof, under the
            Mortgage to which the assignment relates); provided that, if the
            related Mortgage has not been returned from the applicable public
            recording office, such assignment of the Mortgage may exclude the
            information to be provided by the recording office;

                  (D) the original or copies of each assumption, modification,
            written assurance or substitution agreement, if any; and

                  (E) except as provided below, the original or duplicate
             original lender's title policy and all riders thereto.

            (ii) In connection with the transfer and assignment set forth in
  clause (a) above, the Depositor has delivered or caused to be delivered to the
  Custodian, on behalf of the Trustee, for the benefit of the Certificateholders
  the following documents or instruments with respect to each Cooperative Loan
  so assigned:

                  (A) the Cooperative Shares, together with the Stock Power in
            blank;

                   (B) the executed Security Agreement;

                  (C) the executed Proprietary Lease and the Assignment of
            Proprietary Lease to the originator of the Cooperative Loan;

                  (D) the executed Recognition Agreement, if any;

                  (E) copies of the original UCC financing statement, and any
            continuation statements, filed by the originator of such Cooperative
            Loan as secured party, each with evidence of recording thereof,
            evidencing the interest of the originator under the Security
            Agreement and the Assignment of Proprietary Lease;

                  (F) copies of the filed UCC assignments or amendments of the
            security interest referenced in clause (e) above showing an unbroken
            chain of title from the originator to the Trust, each with evidence
            of recording thereof, evidencing the interest of the assignee under
            the Security Agreement and the Assignment of Proprietary Lease;

                  (G) an executed assignment of the interest of the originator
            in the Security Agreement, the Assignment of Proprietary Lease and
            the Recognition Agreement, if any, showing an unbroken chain of
            title from the originator to the Trust; and

                  (H) for any Cooperative Loan that has been modified or
            amended, the original instrument or instruments effecting such
            modifications or amendment.

            Notwithstanding the foregoing, if any Mortgage has been recorded in
the name of Mortgage Electronic Registration System, Inc. ("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 enforce the
obligations of the applicable Servicer under the related Servicing Agreement to
cause the Trustee 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.

            If in connection with any Mortgage Loan the Depositor cannot deliver
(a) the original recorded Mortgage, (b) all interim recorded assignments or (c)
the lender's title policy (together with all riders thereto) satisfying the
requirements of clause (b)(i)(B), (b)(i)(C) or (b)(i)(E) above, respectively,
concurrently with the execution and delivery hereof because such document or
documents have not been returned from the applicable public recording office in
the case of clause (b)(i)(B) or (b)(i)(C) above, or because the title policy has
not been delivered to either the Custodian or the Depositor by the applicable
title insurer in the case of clause (b)(i)(E) above, the Depositor shall
promptly deliver to the Custodian, in the case of clause (b)(i)(B) or (b)(i)(C)
above, such original Mortgage or such interim assignment, as the case may be,
with evidence of recording indicated thereon upon receipt thereof from the
public recording office, or a copy thereof, certified, if appropriate, by the
relevant recording office, but in no event shall any such delivery of the
original Mortgage and each such interim assignment or a copy thereof, certified,
if appropriate, by the relevant recording office, be made later than one year
following the Closing Date, or, in the case of clause (b)(i)(E) above, no later
than 120 days following the Closing Date; provided, however, in the event the
Depositor is unable to deliver by such date each Mortgage and each such interim
assignment by reason of the fact that any such documents have not been returned
by the appropriate recording office, or, in the case of each such interim
assignment, because the related Mortgage has not been returned by the
appropriate recording office, the Depositor shall deliver such documents to the
Custodian as promptly as possible upon receipt thereof and, in any event, within
720 days following the Closing Date. The Depositor shall forward or cause to be
forwarded to the Custodian (a) from time to time additional original documents
evidencing an assumption or modification of a Mortgage Loan and (b) any other
documents required to be delivered by the Depositor to the Custodian. In the
event that the original Mortgage is not delivered and in connection with the
payment in full of the related Mortgage Loan and the public recording office
requires the presentation of a "lost instruments affidavit and indemnity" or any
equivalent document, because only a copy of the Mortgage can be delivered with
the instrument of satisfaction or reconveyance, the Custodian shall execute and
deliver or cause to be executed and delivered such a document to the public
recording office. In the case where a public recording office retains the
original recorded Mortgage or in the case where a Mortgage is lost after
recordation in a public recording office, the Transferor shall deliver to the
Custodian a copy of such Mortgage certified by such public recording office to
be a true and complete copy of the original recorded Mortgage.

            As promptly as practicable subsequent to such transfer and
assignment, set forth in clause (a) above and in any event, within ninety (90)
days thereafter, the Custodian shall affix the Trustee's name to each assignment
of Mortgage, as the assignee thereof, and, subject to Section 2.02, the Master
Servicer shall enforce the obligations of the related Servicer pursuant to the
related Servicing Agreement to (i) cause such assignment to be in proper form
for recording in the appropriate public office for real property records and
(ii) cause to be delivered for recording in the appropriate public office for
real property records the assignments of the Mortgages to the Trustee, except
that, with respect to any assignments of Mortgage as to which the related
Servicer has not received the information required to prepare such assignment in
recordable form, the related Servicer's obligation to do so and to deliver the
same for such recording shall be as soon as practicable after receipt of such
information and in any event within ninety (90) days after receipt thereof and
except that the related Servicer need not cause to be recorded any assignment
which relates to a Mortgage Loan (a) in any state where, in an Opinion of
Counsel addressed to the Trustee, such recording is not required to protect the
Trustee's interests in the Mortgage Loan against the claim of any subsequent
transferee or any successor to or creditor of the Depositor or the Transferor,
(b) in any state where recordation is not required by either Rating Agency to
obtain the initial ratings on the Certificates set forth in the Prospectus
Supplement or (c) with respect to any Mortgage which has been recorded in the
name of MERS, or its designee. As for the date hereof, recordation is not
required in any state by any Rating Agency to obtain the initial rating on the
Certificates (upon which statement the Master Servicer, the Trustee and the
Custodian may conclusively rely).

            In the case of Mortgage Loans that have been prepaid in full as of
the Closing Date, the Depositor, in lieu of delivering the above documents to
the Custodian on behalf of the Trustee, will deposit in the Collection Account
the portion of such payment that is required to be deposited in the Collection
Account pursuant to Section 3.07 hereof.

            (c) The Depositor does hereby establish, pursuant to the further
provisions of this Agreement and the laws of the State of New York, an express
trust (the "Trust") to be known, for convenience, as "MASTR Adjustable Rate
Mortgages Trust 2005-2" and JPMorgan Chase Bank, N.A., is hereby appointed as
Trustee in accordance with the provisions of this Agreement.

            (d) It is agreed and understood by the Trustee, the Depositor and
the Transferor that it is not intended that any mortgage loan be included in the
Trust that is a High Cost Loan.

            (e) Prior to the first Distribution Date, the Depositor shall remit
to the Master Servicer for deposit in the Collection Account the Initial
Depositor Required Deposit in respect of the Alternate Cut-Off Date Mortgage
Loans. Such amount shall be allocated as interest with respect to each of the
Loan Groups based on the aggregate amount of interest that would have accrued on
each Alternate Cut-Off Date Mortgage Loan in each such Loan Group for the
Interest Accrual Period related to the March 2005 Distribution Date, had the
Cut-Off Date for such Mortgage Loans been February 1, 2005 (instead of March 1,
2005).

            Section 2.02 Acceptance by Trustee of the Mortgage Loans. The
Custodian, on behalf of the Trustee, acknowledges receipt of the documents
identified in the Initial Certification in the form annexed hereto as Exhibit F,
and declares that it holds and will hold such documents and the other documents
delivered to it constituting the related Mortgage Files, and the Custodian and
the Trustee together declare that it holds or will hold such other assets as are
included in the Trust Fund, in trust for the exclusive use and benefit of all
present and future Certificateholders. The Custodian acknowledges that it will
maintain possession of the Mortgage Notes held by it in the State of Minnesota,
unless otherwise permitted by the Rating Agencies and the Trustee.

            The Custodian agrees to execute and deliver on the Closing Date to
the Depositor and the Trustee an Initial Certification in the form annexed
hereto as Exhibit F. Based on its review and examination, and only as to the
documents identified in such Initial Certification, the Custodian acknowledges,
subject to any applicable exceptions noted on Exhibit F that such documents
appear regular on their face and relate to such Mortgage Loan. The Custodian
shall not be under any duty or obligation to (i) inspect, review or examine said
documents, instruments, certificates or other papers to determine that the same
are genuine, enforceable or appropriate for the represented purpose or that they
have actually been recorded in the real estate records or that they are other
than what they purport to be on their face or (ii) determine whether the
Mortgage File should include any of the documents specified in Section
2.01(b)(i)(D) with respect to each Mortgage Loan that is not a Cooperative Loan
and Section 2.01(b)(ii)(H) with respect to each Cooperative Loan, unless the
Mortgage Loan Schedule indicates that such documents are applicable.

            Not later than 90 days after the Closing Date, the Custodian shall
deliver to the Depositor, the Trustee and the Transferor a Final Certification
in the form annexed hereto as Exhibit G, with any applicable exceptions noted
thereon. The Custodian shall make available, upon request of any
Certificateholder, a copy of any exceptions noted on the Initial Certification
or Final Certification. The Custodian shall make available, upon request of the
Trustee, the identity of the originator for any Mortgage Loan with a material
exception.

            If, in the course of such review, the Custodian finds any document
constituting a part of a Mortgage File which does not meet the requirements of
Section 2.01, the Custodian shall list such as an exception in the Final
Certification; provided, however, that the Custodian shall not make any
determination as to whether (i) any endorsement is sufficient to transfer all
right, title and interest of the party so endorsing, as noteholder or assignee
thereof, in and to that Mortgage Note, (ii) any assignment is in recordable form
or is sufficient to effect the assignment of and transfer to the assignee
thereof under the mortgage to which the assignment relates or (iii) the Mortgage
File should include any of the documents specified in Section 2.01(b)(i)(D) with
respect to each Mortgage Loan that is not a Cooperative Loan and Section
2.01(b)(ii)(H) with respect to each Cooperative Loan, unless the Mortgage Loan
Schedule indicates that such documents are applicable.

            Upon receiving the Final Certification from the Custodian, the
Trustee shall notify the Transferor of any document defects listed as exceptions
in each such Final Certification. The Trustee shall enforce the applicable
duties of the Transferor pursuant to the terms of this Section 2.02 to correct
and cure such document defects, and if the Transferor fails to correct or cure
the defect within ninety (90) days of the earlier of its discovery or its
receipt of written notice of any document constituting a part of a Mortgage File
that does not meet the requirements of Section 2.01, and such defect materially
and adversely affects the interests of the Certificateholders in the related
Mortgage Loan, the Transferor shall repurchase the affected Mortgage Loan at the
Purchase Price and the Trustee shall enforce the Transferor's obligations
hereunder to purchase such Mortgage Loan at the Purchase Price. Any such
purchase of a Mortgage Loan shall not be effected prior to the delivery to the
Custodian of a Request for Release substantially in the form of Exhibit L. The
Purchase Price for any such Mortgage Loan shall be paid by the Transferor to the
Master Servicer for deposit in the Collection Account on or prior to the
Distribution Account Deposit Date for the Distribution Date in the month
following the month of repurchase and, upon receipt of such deposit, the Master
Servicer shall instruct the Custodian to release, and the Custodian shall
release, the related Mortgage File to the Transferor and the Trustee shall
execute and deliver at the Transferor's written request such instruments of
transfer or assignment prepared by the Transferor, in each case without
recourse, representation or warranty, as shall be necessary to vest in the
Transferor, or a designee, the Trustee's interest in any Mortgage Loan released
pursuant hereto. The Transferor shall promptly reimburse the Master Servicer and
the Trustee for any expenses reasonably incurred by the Master Servicer or the
Trustee in respect of enforcing such repurchase by the Transferor.

            The Custodian shall retain possession and custody of each related
Mortgage File in accordance with and subject to the terms and conditions set
forth herein. Pursuant to the terms of the related Servicing Agreement, the
Master Servicer shall cause each of the related Servicers to promptly deliver to
the Custodian who shall thereupon promptly deposit within each Mortgage File,
upon the execution or receipt thereof, the originals of such other documents or
instruments constituting the Mortgage File as come into the possession of the
related Servicers from time to time.

            It is understood and agreed that the obligations of the Transferor,
hereunder, to purchase any Mortgage Loan which does not meet the requirements of
Section 2.01 above or substitute for the related Mortgage Loan an Eligible
Substitute Mortgage Loan shall constitute the sole remedies respecting such
defect available to the Trustee, the Master Servicer, the Trust Administrator,
the Depositor and any Certificateholder.

            Section 2.03 Remedies for Breaches of Representations and
Warranties. The Transferor hereby makes the representations and warranties set
forth in Schedule II hereto, and by this reference incorporated herein, to the
Depositor and the Trustee, as of the Closing Date, or if so specified therein,
as of the Cut-off Date.

            Upon discovery by any of the parties hereto of a breach of a
representation or warranty made by the Transferor pursuant to this Section 2.03
that materially and adversely affects the interests of the Certificateholders in
any Mortgage Loan, the party discovering such breach shall give prompt notice
thereof to the other parties. Notwithstanding the foregoing, a breach which
causes a Mortgage Loan not to constitute a "qualified mortgage" within the
meaning of Section 860G(a)(3) of the Code, will be deemed automatically to
materially and adversely affect the interests of the Certificateholders in such
Mortgage Loan. Upon receiving notice of a breach, the Trustee shall in turn
notify the Transferor of such breach. The Trustee shall enforce the obligations
of the Transferor in accordance with this Section 2.03 to correct or cure any
such breach of a representation or warranty made herein, and if the Transferor
fails to correct or cure the defect within such period, and such defect
materially and adversely affects the interests of the Certificateholders in the
related Mortgage Loan, the Trustee shall enforce the Transferor's obligations
hereunder to (i) purchase such Mortgage Loan at the Purchase Price or (ii)
substitute for the related Mortgage Loan an Eligible Substitute Mortgage Loan.
In each case, such Mortgage Loan (a "Deleted Mortgage Loan") will be removed
from the Trust Fund.

            The Transferor hereby covenants that within ninety (90) days of the
earlier of its discovery or its receipt of written notice from any party of a
breach of any representation or warranty made pursuant to this Section 2.03
which materially and adversely affects the interest of the Certificateholders in
any Mortgage Loan it shall cure such breach in all material respects, and if
such breach is not so cured, shall, (i) if such ninety (90) day period expires
prior to the second anniversary of the Closing Date, remove such Deleted
Mortgage Loan from the Trust Fund and substitute in its place an Eligible
Substitute Mortgage Loan or Loans into the Trust Fund, in the manner and subject
to the conditions set forth in this Section; or (ii) repurchase the affected
Mortgage Loan or Mortgage Loans at the Purchase Price in the manner set forth
below. The Transferor shall promptly reimburse the Master Servicer and the
Trustee for any expenses reasonably incurred by the Master Servicer or the
Trustee in respect of enforcing the remedies for such breach by the Transferor.

            With respect to any Eligible Substitute Mortgage Loan or Loans, the
Transferor shall deliver to the Custodian on behalf of the Trustee for the
benefit of the Certificateholders the Mortgage Note, the Mortgage, the related
assignment of the Mortgage, and such other documents and agreements as are
required by Section 2.01, with the Mortgage Note endorsed and the Mortgage
assigned as required by Section 2.01. No substitution is permitted to be made on
any day in any calendar month after the Determination Date for such month.

            With respect to substitutions made by the Transferor, Scheduled
Payments due with respect to Eligible Substitute Mortgage Loans in the month of
substitution shall not be part of the Trust Fund and will be retained by the
Transferor on the next succeeding Distribution Date. For the month of
substitution, distributions to Certificateholders will include the monthly
payment due on any Deleted Mortgage Loan for such month and thereafter the
Transferor shall be entitled to retain all amounts received in respect of such
Deleted Mortgage Loan. The Custodian shall amend the Mortgage Loan Schedule for
the benefit of the Certificateholders to reflect the removal of such Deleted
Mortgage Loan and the substitution of the Eligible Substitute Mortgage Loan or
Loans and the Custodian shall deliver the amended Mortgage Loan Schedule to the
Trustee. Upon such substitution, the Eligible Substitute Mortgage Loan or Loans
shall be subject to the terms of this Agreement in all respects, and the
Transferor shall be deemed to have made with respect to such Eligible Substitute
Mortgage Loan or Loans, as of the date of substitution, the representations and
warranties made pursuant to this Section 2.03 with respect to such Mortgage
Loan. Upon any such substitution and the deposit to the Collection Account of
the amount required to be deposited therein in connection with such substitution
as described in the following paragraph, the Custodian shall release the
Mortgage File held for the benefit of the Certificateholders relating to such
Deleted Mortgage Loan to the Transferor and shall execute and deliver or cause
the Trustee to execute and deliver at the Transferor's direction such
instruments of transfer or assignment prepared by the Transferor, without
recourse, representation or warranty, as shall be necessary to vest title in the
Transferor, as applicable, or its designee, the Trustee's interest in any
Deleted Mortgage Loan substituted for pursuant to this Section 2.03.

            For any month in which the Transferor substitutes one or more
Eligible Substitute Mortgage Loans for one or more Deleted Mortgage Loans, the
Master Servicer will determine the amount (if any) by which the aggregate
principal balance of all such Eligible Substitute Mortgage Loans as of the date
of substitution is less than the aggregate Scheduled Principal Balance of all
such Deleted Mortgage Loans (after application of the scheduled principal
portion of the monthly payments due in the month of substitution). The amount of
such shortage (the "Substitution Adjustment Amount") plus an amount equal to the
aggregate of any unreimbursed Advances with respect to such Deleted Mortgage
Loans shall be remitted by the Transferor to the Master Servicer, and the Master
Servicer shall deposit such amounts received from the Transferor into the
Collection Account on or before the Distribution Account Deposit Date for the
Distribution Date in the month succeeding the calendar month during which the
related Mortgage Loan became required to be purchased or replaced hereunder.

            In the event that the Transferor shall have repurchased a Mortgage
Loan, the Purchase Price therefor shall be deposited in the Collection Account
pursuant to Section 3.07 on or before the Distribution Account Deposit Date for
the Distribution Date in the month following the month during which the
Transferor became obligated hereunder to repurchase or replace such Mortgage
Loan and upon such deposit of the Purchase Price and receipt of a Request for
Release in the form of Exhibit L hereto, the Custodian shall release the related
Mortgage File held for the benefit of the Certificateholders to the Transferor,
and the Trustee shall execute and deliver at the Transferor's direction such
instruments of transfer or assignment prepared by the Transferor, in each case
without recourse, representation or warranty, as shall be necessary to transfer
title from the Trustee. It is understood and agreed that the obligation under
this Agreement of the Transferor to cure, repurchase or replace any Mortgage
Loan as to which a breach has occurred and is continuing shall constitute the
sole remedies against the Transferor respecting such matters available to
Certificateholders, the Master Servicer, the Depositor, the Trust Administrator
or the Trustee on their behalf.

            The provisions of this Section 2.03 shall survive the conveyance and
assignment of the Mortgage Files to the Trustee and the delivery of the
respective Mortgage Files to the Custodian for the benefit of the Trustee and
the Certificateholders.

            Section 2.04 Representations and Warranties of the Depositor as to
the Mortgage Loans. The Depositor hereby represents and warrants to the Trustee,
the Trust Administrator and the Master Servicer with respect to each Mortgage
Loan as of the date hereof or such other date set forth herein that as of the
Closing Date, and following the transfer of the Mortgage Loans to it by the
Transferor, the Depositor had good title to the Mortgage Loans and the Mortgage
Notes were subject to no offsets, liens, defenses or counterclaims.

            It is understood and agreed that the representations and warranties
set forth in this Section 2.04 shall survive delivery of the Mortgage Files to
the Custodian. Upon discovery by the Depositor, the Transferor, the Master
Servicer, the Trust Administrator or the Trustee of a breach of any of the
foregoing representations and warranties set forth in this Section 2.04
(referred to herein as a "breach"), which breach materially and adversely
affects the interest of the Certificateholders, the party discovering such
breach shall give prompt written notice to the other parties hereto and to each
Rating Agency.

            Section 2.05 Execution and Delivery of Certificates. The Trustee
acknowledges the transfer and assignment to it of the assets of the Trust Fund
and acknowledges the issuance of the Lower-Tier REMIC Regular Interests and the
Class A-LR Certificates in exchange therefor. The Trustee acknowledges the
transfer and assignment to it of the Lower-Tier REMIC Regular Interests and
acknowledges the issuance of the Middle-Tier REMIC Regular Interests and the
Class A-MR Interest (represented by the Class A-UR Certificates) in exchange
therefor. The Trustee further acknowledges the transfer and assignment to it of
the Middle-Tier REMIC Regular Interests and, concurrently with such transfer and
assignment, acknowledges the issuance of the Class A-UR Interest (represented by
the Class A-UR Certificates). The Trust Administrator on behalf of the Trustee
has executed, authenticated and delivered to or upon the order of the Depositor,
the Certificates (other than the Class A-LR Certificates) in authorized
denominations evidencing directly or indirectly the entire ownership of the
Upper-Tier REMIC in exchange therefor. The Trustee agrees to hold the Trust Fund
and the Lower-Tier REMIC Regular Interests and the Middle-Tier REMIC Regular
Interests and to exercise the rights referred to above for the benefit of all
present and future Holders of the Certificates and to perform the duties set
forth in this Agreement to the best of its ability, to the end that the
interests of the Holders of the Certificates may be adequately and effectively
protected.

            Section 2.06 REMIC Matters. The Preliminary Statement sets forth the
designations as "regular interests" or "residual interests" and "latest possible
maturity date" for federal income tax purposes of all interests created hereby.
The "Startup Day" for purposes of the REMIC Provisions shall be the Closing
Date. Each REMIC shall have the calendar year as its fiscal year and shall use
the accrual method of accounting.

             For federal income tax purposes, the Class 7-A-X Certificates shall
represent a "specified portion," within the meaning of the REMIC Provisions, of
the interest payments on the Class 7-A-M1 Interest equal to the product of (i)
the excess of (A) the weighted average of the Net Mortgage Rates on the Group 7
Mortgage Loans over (B) the excess of (but not less than zero) (a) the weighted
average of the Net Mortgage Rates on the Group 7 Mortgage Loans over (b) 0.1679%
and (ii) the principal balance of the Class 7-A-M1 Interest.

            The pass-through rate with respect to the Class L-1B Interest and
Class L-1Q Interest shall be a per annum rate equal to the weighted average of
the Net Mortgage Rates on the Group 1 Mortgage Loans. The pass-through rate with
respect to the Class L-2B Interest and Class L-2Q Interest shall be a per annum
rate equal to the weighted average of the Net Mortgage Rates on the Group 2
Mortgage Loans. The pass-through rate with respect to the Class L-3B Interest
and Class L-3Q Interest shall be a per annum rate equal to the weighted average
of the Net Mortgage Rates on the Group 3 Mortgage Loans. The pass-through rate
with respect to the Class L-4B Interest and Class L-4Q Interest shall be a per
annum rate equal to the weighted average of the Net Mortgage Rates on the Group
4 Mortgage Loans. The pass-through rate with respect to the Class L-5B Interest
and Class L-5Q Interest shall be a per annum rate equal to the weighted average
of the Net Mortgage Rates on the Group 5 Mortgage Loans. The pass-through rate
with respect to the Class L-6B Interest and Class L-6Q Interest shall be a per
annum rate equal to the weighted average of the Net Mortgage Rates on the Group
6 Mortgage Loans. The pass-through rate with respect to the Class L-7B Interest
and Class L-7Q Interest shall be a per annum rate equal to the weighted average
of the Net Mortgage Rates on the Group 7 Mortgage Loans. Each of the foregoing
determinations, shall be weighted on the basis of their respective Scheduled
Principal Balances, as of the first day of the related Interest Accrual Period
(after taking into account scheduled payments of principal on such date).

            As of the Closing Date and any date of determination, (i) the
principal balance of the Class L-1B Interest shall equal 0.10% of the Group 1
Subordinate Amount, (ii) the principal balance of the Class L-2B Interest shall
equal 0.10% of the Group 2 Subordinate Amount, (iii) the principal balance of
the Class L-3B Interest shall equal 0.10% of the Group 3 Subordinate Amount,
(iv) the principal balance of the Class L-4B Interest shall equal 0.10% of the
Group 4 Subordinate Amount, (v) the principal balance of the Class L-5B Interest
shall equal 0.10% of the Group 5 Subordinate Amount, (vi) the principal balance
of the Class L-6B Interest shall equal 0.10% of the Group 6 Subordinate Amount
and (vii) the principal balance of the Class L-7B Interest shall equal 0.10% of
the Group 7 Subordinate Amount (in each case, computed to at least eight decimal
places).

            As of the Closing Date and any date of determination, (i) the
principal balance of the Class L-1Q Interest shall equal the excess of the
aggregate Scheduled Principal Balance of the Group 1 Mortgage Loans (less $50
allocable to the Class A-LR Certificates until paid) over the principal balance
of the Class L-1B Interest, (ii) the principal balance of the Class L-2Q
Interest shall equal the excess of the aggregate Scheduled Principal Balance of
the Group 2 Mortgage Loans over the principal balance of the Class L-2B
Interest, (iii) the principal balance of the Class L-3Q Interest shall equal the
excess of the aggregate Scheduled Principal Balance of the Group 3 Mortgage
Loans over the principal balance of the Class L-3B Interest, (iv) the principal
balance of the Class L-4Q Interest shall equal the excess of the aggregate
Scheduled Principal Balance of the Group 4 Mortgage Loans over the principal
balance of the Class L-4B Interest, (v) the principal balance of the Class L-5Q
Interest shall equal the excess of the aggregate Scheduled Principal Balance of
the Group 5 Mortgage Loans over the principal balance of the Class L-5B
Interest, (vi) the principal balance of the Class L-6Q Interest shall equal the
excess of the aggregate Scheduled Principal Balance of the Group 6 Mortgage
Loans over the principal balance of the Class L-6B Interest and (vii) the
principal balance of the Class L-7Q Interest shall equal the excess of the
aggregate Scheduled Principal Balance of the Group 7 Mortgage Loans over the
principal balance of the Class L-7B Interest.

            The pass-through rate with respect to the Class 1-A-M1 Interest
shall be a per annum rate equal to the weighted average of the Net Mortgage
Rates on the Group 1 Mortgage Loans. The pass-through rate with respect to the
Class 2-A-M1 Interest shall be a per annum rate equal to the weighted average of
the Net Mortgage Rates on the Group 2 Mortgage Loans. The pass-through rate with
respect to the Class 3-A-M1 Interest shall be a per annum rate equal to the
weighted average of the Net Mortgage Rates on the Group 3 Mortgage Loans. The
pass-through rate with respect to each of the Class 4-A-M1 Interest shall be a
per annum rate equal to the weighted average of the Net Mortgage Rates on the
Group 4 Mortgage Loans. The pass-through rate with respect to the Class 5-A-M1
Interest shall be a per annum rate equal to the weighted average of the Net
Mortgage Rates on the Group 5 Mortgage Loans. The pass-through rate with respect
to the Class 6-A-M1 Interest shall be a per annum rate equal to the weighted
average of the Net Mortgage Rates on the Group 6 Mortgage Loans. The
pass-through rate with respect to the Class 7-A-M1 Interest and Class 7-A-M2
Interest shall be a per annum rate equal to the weighted average of the Net
Mortgage Rates on the Group 7 Mortgage Loans. Each of the foregoing
determinations shall be weighted on the basis of their respective Scheduled
Principal Balances, as of the first day of the related Interest Accrual Period
(after taking into account scheduled payments of principal on such date).

            As of any date, the principal balance of each Middle-Tier REMIC
Regular Interest shall equal the Class Principal Balance of the respective
Corresponding Class or Classes of Certificates. The initial principal balance of
each Middle-Tier REMIC Regular Interest shall equal the initial Class Principal
Balance of the respective Corresponding Class or Classes of Certificates set
forth in the Preliminary Statement.

            For federal income tax purposes, the Pass-Through Rate for the Class
B-1, Class B-2, Class B-3, Class B-4, Class B-5 and Class B-6 Certificates and
each Corresponding Middle-Tier REMIC Regular Interest for any Distribution Date
shall be expressed as a per annum rate equal to the weighted average of (i) the
pass through rate for the Class L-1B Interest, (ii) the pass through rate for
the Class L-2B Interest, (iii) the pass through rate for the Class L-3B
Interest, (iv) the pass through rate for the Class L-4B Interest, (v) the pass
through rate for the Class L-5B Interest, (vi) the pass through rate for the
Class L-6B Interest and (vii) the pass through rate for the Class L-7B Interest,
weighted, for each of the foregoing determinations, on the basis of the
respective principal balance of each such Lower-Tier REMIC Regular Interest
(computed to at least eight decimal places), immediately prior to such
Distribution Date.

            Section 2.07 Covenants of the Master Servicer. The Master Servicer
hereby covenants to the Depositor and the Trustee as follows:

            (a) subject to Section 3.01, the Master Servicer shall cause each
Servicer to perform its obligations under the applicable Servicing Agreement;
and

            (b) no written information, certificate of an officer, statement
furnished in writing or written report delivered to the Depositor, any affiliate
of the Depositor or the Trustee and prepared by the Master Servicer pursuant to
this Agreement will contain any untrue statement of a material fact or omit to
state a material fact necessary to make such information, certificate, statement
or report not misleading at the time provided; provided, however, that the
Master Servicer shall have no liability hereunder and shall be indemnified
pursuant to Section 6.03 for any information with respect to the WMMSC Mortgage
Loans included in any report provided hereunder.

            Section 2.08 Representations and Warranties of the Master Servicer.
The Master Servicer hereby represents and warrants to the Depositor, the
Custodian and the Trustee, as of the Closing Date, or if so specified herein, as
of the Cut-off Date:

            (a) The Master Servicer is duly organized as a national banking
association and is validly existing and in good standing under the laws of the
United States of America and is duly authorized and qualified to transact any
and all business contemplated by this Agreement to be conducted by the Master
Servicer in any state in which a Mortgaged Property is located or is otherwise
not required under applicable law to effect such qualification and, in any
event, is in compliance with the doing business laws of any such state, to
master service the Mortgage Loans in accordance with the terms of this Agreement
and to perform any of its other obligations under this Agreement in accordance
with the terms hereof.

            (b) The Master Servicer has the full power and authority to master
service each Mortgage Loan, and to execute, deliver and perform, and to enter
into and consummate the transactions contemplated by this Agreement and has duly
authorized by all necessary action on the part of the Master Servicer the
execution, delivery and performance of this Agreement; and this Agreement,
assuming the due authorization, execution and delivery hereof by the other
parties hereto, constitutes a legal, valid and binding obligation of the Master
Servicer, enforceable against the Master Servicer in accordance with its terms,
except that (i) the enforceability hereof may be limited by bankruptcy,
insolvency, moratorium, receivership and other similar laws relating to
creditors' rights generally and (ii) the remedy of specific performance and
injunctive and other forms of equitable relief may be subject to equitable
defenses and to the discretion of the court before which any proceeding therefor
may be brought.

            (c) The execution and delivery of this Agreement by the Master
Servicer, and the master servicing of the Mortgage Loans by the Master Servicer
under this Agreement, the consummation of any other of the transactions
contemplated by this Agreement, and the fulfillment of or compliance with the
terms hereof are in the ordinary course of business of the Master Servicer and
will not (i) result in a material breach of any term or provision of the
articles of incorporation or by laws of the Master Servicer, (ii) materially
conflict with, result in a material breach, violation or acceleration of, or
result in a material default under, the terms of any other material agreement or
instrument to which the Master Servicer is a party or by which it may be bound,
or (iii) constitute a material violation of any statute, order or regulation
applicable to the Master Servicer of any court, regulatory body, administrative
agency or governmental body having jurisdiction over the Master Servicer; and
the Master Servicer is not in breach or violation of any material indenture or
other material agreement or instrument, or in violation of any statute, order or
regulation of any court, regulatory body, administrative agency or governmental
body having jurisdiction over it which breach or violation may materially impair
the Master Servicer's ability to perform or meet any of its obligations under
this Agreement.

            (d) The Master Servicer or an affiliate thereof is an approved
servicer of conventional mortgage loans for Fannie Mae or Freddie Mac and is a
mortgagee approved by the Secretary of Housing and Urban Development pursuant to
Sections 203 and 211 of the National Housing Act.

            (e) No litigation is pending, or to the knowledge of the Master
Servicer, threatened against the Master Servicer that would materially and
adversely affect the execution, delivery or enforceability of this Agreement or
the ability of the Master Servicer to master service the Mortgage Loans or to
perform any of its other obligations under this Agreement in accordance with the
terms thereof.

            (f) No consent, approval, authorization or, to the knowledge of the
Master Servicer, order of any court or governmental agency or body is required
for the execution, delivery and performance by the Master Servicer of, or
compliance by the Master Servicer with, this Agreement or the consummation of
the transactions contemplated thereby, or if any such consent, approval,
authorization or order is required, the Master Servicer has obtained the same.

            Section 2.09 Representations and Warranties of the Custodian. The
Custodian hereby represents and warrants to the Depositor, the Master Servicer,
the Trust Administrator and the Trustee, as of the Closing Date, or if so
specified herein, as of the Cut-off Date:

            (a) Such Custodian is duly organized as a national banking
association and is validly existing and in good standing under the laws of the
United States of America and is duly authorized and qualified to transact any
and all business contemplated by this Agreement to be conducted by such
Custodian in any state in which a Mortgaged Property is located or is otherwise
not required under applicable law to effect such qualification and, in any
event, is in compliance with the doing business laws of any such state, to the
extent necessary to perform any of its obligations under this Agreement in
accordance with the terms thereof.

            (b) Such Custodian has the full power and authority to execute,
deliver and perform, and to enter into and consummate the transactions
contemplated by this Agreement and has duly authorized by all necessary action
on the part of such Custodian the execution, delivery and performance of this
Agreement; and this Agreement, assuming the due authorization, execution and
delivery thereof by the other parties thereto, constitutes a legal, valid and
binding obligation of such Custodian, enforceable against such Custodian in
accordance with its terms, except that (i) the enforceability thereof may be
limited by bankruptcy, insolvency, moratorium, receivership and other similar
laws relating to creditors' rights generally and (ii) the remedy of specific
performance and injunctive and other forms of equitable relief may be subject to
equitable defenses and to the discretion of the court before which any
proceeding therefore may be brought.

            (c) The execution and delivery of this Agreement by such Custodian,
the consummation of any other of the transactions contemplated by this
Agreement, and the fulfillment of or compliance with the terms thereof are in
the ordinary course of business of such Custodian and will not (i) result in a
material breach of any term or provision of the articles of incorporation or
by-laws of such Custodian, (ii) materially conflict with, result in a material
breach, violation or acceleration of, or result in a material default under, the
terms of any other material agreement or instrument to which such Custodian is a
party or by which it may be bound, or (iii) constitute a material violation of
any statute, order or regulation applicable to such Custodian of any court,
regulatory body, administrative agency or governmental body having jurisdiction
over such Custodian; and such Custodian is not in breach or violation of any
material indenture or other material agreement or instrument, or in violation of
any statute, order or regulation of any court, regulatory body, administrative
agency or governmental body having jurisdiction over it which breach or
violation may materially impair such Custodian's ability to perform or meet any
of its obligations under this Agreement.

            (d) No litigation is pending or, to the knowledge of such Custodian,
threatened against such Custodian that would materially and adversely affect the
execution, delivery or enforceability of this Agreement or the ability of such
Custodian to perform any of its obligations under this Agreement in accordance
with the terms thereof.

             (e) No consent, approval, authorization or order of any court or
governmental agency or body is required for the execution, delivery and
performance by such Custodian of, or compliance by such Custodian with, this
Agreement or the consummation of the transactions contemplated thereby, or if
any such consent, approval, authorization or order is required, such Custodian
has obtained the same.

                                   ARTICLE III

                            ADMINISTRATION AND MASTER
                            SERVICING OF MORTGAGE LOANS

            Section 3.01 Master Servicing of Mortgage Loans. For and on behalf
of the Certificateholders, the Master Servicer shall supervise, monitor and
oversee the obligation of the Servicers to service and administer their
respective Mortgage Loans in accordance with the terms of the applicable
Servicing Agreement and shall have full power and authority to do any and all
things which it may deem necessary or desirable in connection with such master
servicing and administration. With respect to WMMSC, any WMMSC Mortgage Loans
and any WMMSC Servicing Agreement, the obligations of the Master Servicer
imposed in the preceding sentence shall be limited to: (i) collecting the
monthly report provided by WMMSC under such WMMSC Servicing Agreement, (ii)
enforcing WMMSC's obligation to remit to the Trust Administrator hereunder,
(iii) receiving the annual compliance statements from WMMSC and (iv) complying
with the provisions of Section 3.02(b) hereof and such WMMSC Servicing Agreement
with respect to the termination of WMMSC. In performing its obligations
hereunder, the Master Servicer shall act in a manner consistent with this
Agreement, subject to the prior sentence, and with customary and usual standards
of practice of prudent mortgage loan master servicers. Furthermore, the Master
Servicer shall oversee and consult with each Servicer as necessary from time to
time to carry out the Master Servicer's obligations hereunder, shall receive,
review and evaluate all reports, information and other data provided to the
Master Servicer by each Servicer (provided, however, the Master Servicer shall
have no obligation to review or evaluate any reports, information and other data
provided by WMMSC with respect to any WMMSC Mortgage Loans) and shall cause each
Servicer to perform and observe the covenants, obligations and conditions to be
performed or observed by such Servicer under the applicable Servicing Agreement.
The Master Servicer shall independently and separately monitor each Servicer's
servicing activities with respect to each related Mortgage Loan, reconcile the
results of such monitoring with such information provided in the previous
sentence on a monthly basis and coordinate corrective adjustments to the
Servicers' and Master Servicer's records, and based on such reconciled and
corrected information, prepare the statements specified in Section 4.04 and any
other information and statements required hereunder; provided, however, that the
Master Servicer shall be under no obligation to perform the duties outlined in
this sentence with respect to WMMSC or any WMMSC Mortgage Loans other than
collecting the mortgage loan information provided to the Master Servicer by
WMMSC to enable the Master Servicer to prepare the statement required under
Section 4.04. Other than with respect to WMMSC and any WMMSC Mortgage Loans, the
Master Servicer shall reconcile the results of its Mortgage Loan monitoring with
the actual remittances of the Servicers to the Collection Account pursuant to
the applicable Servicing Agreements.

            In accordance with the standards of the preceding paragraph and to
the extent the related Servicer does not make such advance, the Master Servicer
shall advance or cause to be advanced funds as necessary for the purpose of
effecting the payment of taxes and assessments on the Mortgaged Properties,
which advances shall be reimbursable in the first instance from related
collections from the Mortgagors pursuant to Section 3.07, and further as
provided in Section 3.08. The costs incurred by the Master Servicer, if any, in
effecting the timely payment of taxes and assessments on the Mortgaged
Properties and related insurance premiums shall not, for the purpose of
calculating monthly distributions to the Certificateholders, be added to the
Scheduled Principal Balances of the related Mortgage Loans, notwithstanding that
the terms of such Mortgage Loans so permit.

            Section 3.02 Monitoring of Servicers. (a) The Master Servicer shall
be responsible for reporting to the Trustee, the Trust Administrator and the
Depositor the compliance by each Servicer with its duties under the related
Servicing Agreement. In the review of each Servicer's activities, the Master
Servicer may rely upon an officer's certificate of the Servicer with regard to
such Servicer's compliance with the terms of its Servicing Agreement. In the
event that the Master Servicer, in its judgment, determines that a Servicer
should be terminated in accordance with its Servicing Agreement, or that a
notice should be sent pursuant to such Servicing Agreement with respect to the
occurrence of an event that, unless cured, would constitute grounds for such
termination, the Master Servicer shall notify the Depositor, the Trust
Administrator and the Trustee thereof and the Master Servicer shall issue such
notice or take such other action as it deems appropriate.

            (b) The Master Servicer, for the benefit of the Trustee, the Trust
Administrator and the Certificateholders, shall enforce the obligations of each
Servicer under the related Servicing Agreement, and shall, in the event that a
Servicer fails to perform its obligations in accordance with the related
Servicing Agreement, subject to the preceding paragraph, terminate the rights
and obligations of such Servicer thereunder and act as successor Servicer of the
related Mortgage Loans or cause the Trustee to enter into a new Servicing
Agreement with a successor Servicer selected by the Master Servicer; provided,
however, it is understood and acknowledged by the parties hereto that there will
be a period of transition (not to exceed 90 days) before the actual servicing
functions can be fully transferred to such successor Servicer. Such enforcement,
including, without limitation, the legal prosecution of claims, termination of
Servicing Agreements and the pursuit of other appropriate remedies, shall be in
such form and carried out to such an extent and at such time as the Master
Servicer, in its good faith business judgment, would require were it the owner
of the related Mortgage Loans. The Master Servicer shall pay the costs of such
enforcement at its own expense, provided that the Master Servicer shall not be
required to prosecute or defend any legal action except to the extent that the
Master Servicer shall have received reasonable indemnity for its costs and
expenses in pursuing such action.

            (c) To the extent that the costs and expenses of the Master Servicer
related to any termination of a Servicer, appointment of a successor Servicer or
the transfer and assumption of servicing by the Master Servicer with respect to
any Servicing Agreement (including, without limitation, (i) all legal costs and
expenses and all due diligence costs and expenses associated with an evaluation
of the potential termination of the Servicer as a result of an event of default
by such Servicer and (ii) all costs and expenses associated with the complete
transfer of servicing, including all servicing files and all servicing data and
the completion, correction or manipulation of such servicing data as may be
required by the successor servicer to correct any errors or insufficiencies in
the servicing data or otherwise to enable the successor servicer to service the
Mortgage Loans in accordance with the related Servicing Agreement) are not fully
and timely reimbursed by the terminated Servicer, the Master Servicer shall be
entitled to reimbursement of such costs and expenses from the Collection
Account.

            (d) The Master Servicer shall require each Servicer to comply with
the remittance requirements and other obligations set forth in the related
Servicing Agreement.

            (e) If the Master Servicer acts as Servicer, it will not assume
liability for the representations and warranties of the Servicer, if any, that
it replaces.

            (f) If a Servicer fails to make its required payment of Compensating
Interest on any Distribution Date, the Master Servicer will be required to make
such payment of Compensating Interest to the same extent that such Servicer was
required to make such payment of Compensating Interest.

            (g) To the extent a Servicer requests the consent of the Trust or
the Master Servicer with respect to any servicing-related matter for which the
applicable Servicer is required to seek consent under the applicable Servicing
Agreement or Assignment Agreement, the Master Servicer shall promptly or within
the time frame specified in such Servicing Agreement, if any, evaluate such
request for consent in the best interest of the Trust and the
Certificateholders, and grant or withhold such consent accordingly.

            Section 3.03 [Reserved].

            Section 3.04 Rights of the Depositor and the Trustee in Respect of
the Master Servicer. The Depositor may, but is not obligated to, enforce the
obligations of the Master Servicer hereunder and may, but is not obligated to,
perform, or cause a designee to perform, any defaulted obligation of the Master
Servicer hereunder and in connection with any such defaulted obligation to
exercise the related rights of the Master Servicer hereunder; provided that the
Master Servicer shall not be relieved of any of its obligations hereunder by
virtue of such performance by the Depositor or its designee. Neither the Trustee
nor the Depositor shall have any responsibility or liability for any action or
failure to act by the Master Servicer or any Servicer nor shall the Trustee or
the Depositor be obligated to supervise the performance of the Master Servicer
hereunder or any Servicer under any Servicing Agreement or otherwise.

            Section 3.05 Trustee to Act as Master Servicer. In the event that
the Master Servicer shall for any reason no longer be the Master Servicer
hereunder (including by reason of a Master Servicer Event of Termination), the
Trustee or its successor shall in accordance with Section 7.02 thereupon assume
all of the rights and obligations of the Master Servicer hereunder arising
thereafter (except that the Trustee shall not be (i) liable for losses of the
predecessor Master Servicer or any acts or omissions of the predecessor Master
Servicer hereunder), (ii) obligated to make Advances if it is prohibited from
doing so by applicable law, (iii) obligated to effectuate repurchases or
substitutions of Mortgage Loans hereunder including, but not limited to,
repurchases or substitutions of Mortgage Loans pursuant to Section 2.02 or 2.03
hereof, (iv) responsible for expenses of the Master Servicer pursuant to Section
2.03 hereof or (v) deemed to have made any representations and warranties of the
Master Servicer pursuant to Section 2.08 hereunder). Any such assumption shall
be subject to Section 7.02 hereof. If the Master Servicer shall for any reason
no longer be the Master Servicer (including by reason of any Master Servicer
Event of Termination), the Trustee or its successor may, but shall not be
obligated to, succeed to any rights and obligations of the Master Servicer under
each subservicing agreement.

            The Master Servicer shall, upon request of the Trustee, but at the
expense of the Master Servicer, deliver to the assuming party all documents and
records relating to each subservicing agreement or substitute subservicing
agreement and the Mortgage Loans then being serviced thereunder and an
accounting of amounts collected or held by it and otherwise use its best efforts
to effect the orderly and efficient transfer of each subservicing agreement or
substitute subservicing agreement to the assuming party.

            The Trustee or successor master servicer shall be entitled to be
reimbursed from the Master Servicer for all costs associated with the transfer
of master servicing from the Master Servicer, including, without limitation, any
costs or expenses associated with the complete transfer of all master servicing
data and the completion, correction or manipulation of such master servicing
data as may be required by the Trustee or successor master servicer to correct
any errors or insufficiencies in the master servicing data or otherwise to
enable the Trustee or successor master servicer to master service the Mortgage
Loans properly and effectively.

            If the Master Servicer does not pay such reimbursement within thirty
(30) days of its receipt of an invoice therefor, such reimbursement shall be an
expense of the Trust and the Trustee shall be entitled to withdraw such
reimbursement from amounts on deposit in the Distribution Account pursuant to
Section 3.10(b)(iii); provided that the Master Servicer shall reimburse the
Trust for any such expense incurred by the Trust.

            Section 3.06 Protected Accounts. (a) The Master Servicer shall
enforce the obligation of each Servicer to establish and maintain a Protected
Account in accordance with the applicable Servicing Agreement, with records to
be kept with respect thereto on a Mortgage Loan by Mortgage Loan basis, into
which accounts shall be deposited within 48 hours (or as of such other time
specified in the related Servicing Agreement) of receipt all collections of
principal and interest on any Mortgage Loan or amounts received with respect to
any REO Property, including Principal Prepayments, Insurance Proceeds,
Liquidation Proceeds, and advances made from the Servicer's own funds (less
servicing compensation as permitted by the applicable Servicing Agreement in the
case of any Servicer) and all other amounts to be deposited in the Protected
Account. The Master Servicer is hereby authorized to make withdrawals from and
deposits to the related Protected Account for purposes required or permitted by
this Agreement.

            (b) In accordance with the terms of the applicable Servicing
Agreement, amounts on deposit in a Protected Account are required to be invested
by the applicable Servicer in Permitted Investments. The income earned from
investments made pursuant to this Section 3.06 shall be paid to the related
Servicer under the applicable Servicing Agreement, and the risk of loss of
moneys required to be distributed to the Certificateholders resulting from such
investments shall be borne by and be the risk of the related Servicer. The
related Servicer (to the extent provided in the Servicing Agreement) shall
deposit the amount of any such loss in the Protected Account within two Business
Days of receipt of notification of such loss but not later than the second
Business Day prior to the Distribution Date on which the moneys so invested are
required to be distributed to the Certificateholders.

            Section 3.07 Collection of Mortgage Loan Payments; Collection
Account; Distribution Account. (a) The Master Servicer shall enforce the
obligation of the Servicers to collect all payments called for under the terms
and provisions of the Mortgage Loans to the extent such procedures shall be
consistent with the applicable Servicing Agreement and the terms and provisions
of any related Required Insurance Policy.

            (b) The Master Servicer shall establish and maintain a Collection
Account, which may be deemed to be a sub account of the Distribution Account,
into which the Master Servicer shall deposit or cause to be deposited within two
Business Days of receipt, except as otherwise specifically provided herein, the
following payments and collections remitted by the Servicers, or received by it
in respect of Mortgage Loans subsequent to the Cut-off Date (other than in
respect of principal and interest due on the Mortgage Loans on or before the
Cut-off Date) and the following amounts required to be deposited hereunder:

            (i) all payments on account of principal on the Mortgage Loans,
      including Principal Prepayments;

            (ii) all payments on account of interest on the Mortgage Loans, net
      of the related Servicing Fee and Incremental Interest;

            (iii) all Liquidation Proceeds (including Insurance Proceeds), other
      than proceeds to be applied to the restoration or repair of the Mortgaged
      Property or released to the Mortgagor in accordance with the applicable
      Servicer's or Master Servicer's normal servicing procedures, and all
      Recoveries;

            (iv) any amount required to be deposited by the Master Servicer
      pursuant to Section 3.07(e) in connection with any losses on Permitted
      Investments;

            (v) any amounts required to be deposited by the Master Servicer
      pursuant to Section 3.15(b) and 3.15(d), and in respect of net monthly
      rental income from REO Property pursuant to Section 3.15 hereof;

            (vi) all Substitution Adjustment Amounts;

            (vii) all Advances made by the Master Servicer pursuant to Section
      4.01;

            (viii) any Class P Prepayment Charges;

            (ix) any Compensating Interest payments;

            (x) any amounts deposited by the Master Servicer in connection with
      a deductible clause in any blanket hazard insurance policy in respect of
      the Mortgage Loans in such Loan Group;

            (xi) all proceeds of a primary mortgage guaranty insurance policy in
      respect of the Mortgage Loans in such Loan Group;

            (xii) the Initial Depositor Required Deposit; and

            (xiii) any other amounts required to be deposited hereunder.

            In the event that the Master Servicer shall deposit into the
Collection Account any amount not required to be deposited, it may at any time
withdraw such amount from the Collection Account, any provision herein to the
contrary notwithstanding. The Master Servicer shall maintain adequate records
with respect to all withdrawals made pursuant to this Section. All funds
deposited in the Collection Account shall be held in trust for the
Certificateholders until withdrawn in accordance with Section 3.10.

            (c) [Reserved].

            (d) The Trust Administrator shall establish and maintain, on behalf
of the Certificateholders, the Distribution Account. The Trust Administrator
shall, promptly upon receipt but no later than on the Distribution Account
Deposit Date, deposit in the Distribution Account and retain therein the
following:

            (i) the aggregate amount remitted by the Master Servicer to the
      Trust Administrator pursuant to Section 3.10(a)(ix)(A);

            (ii) any amount deposited by the Master Servicer, the Trust
      Administrator or WMMSC pursuant to Section 3.07(e) in connection with any
      losses on Permitted Investments;

            (iii) any WMMSC Monthly Remittance Amount received by the Trust
      Administrator from WMMSC; and

            (iv) any other amounts described hereunder which are required to be
      deposited in the Distribution Account.

In the event that the Master Servicer shall remit any amount not required to be
remitted, it may at any time direct the Trust Administrator in writing to
withdraw such amount from the Distribution Account, any provision herein to the
contrary notwithstanding. Such direction may be accomplished by delivering an
Officer's Certificate to the Trust Administrator which describes the amounts
deposited in error in the Distribution Account. All funds deposited in the
Distribution Account shall be held by the Trust Administrator in trust for the
Certificateholders until disbursed in accordance with this Agreement or
withdrawn in accordance with Section 3.10(b). Funds deposited in the
Distribution Account in respect of the Class P Prepayment Charges shall not be
treated as assets of any Trust REMIC, but shall be treated as assets of a
separate sub-account of the Distribution Account which shall be an asset of the
Grantor Trust for the benefit of the Class P Certificates. In no event shall the
Trust Administrator incur liability for withdrawals from the Distribution
Account at the direction of the Master Servicer.

            (e) Each institution at which the Collection Account or Distribution
Account is maintained shall invest the funds on deposit in the Collection
Account, as directed in writing by the Master Servicer, or the Distribution
Account, as directed in writing by the Trust Administrator, in Permitted
Investments. Funds invested in the Collection Account shall mature not later
than the Business Day next preceding the related Distribution Account Deposit
Date (except that if such Permitted Investment is an obligation of or is managed
by the institution that maintains, or is the custodian for, such account, then
such Permitted Investment shall mature not later than such Distribution Account
Deposit Date). The Trust Administrator shall, with respect to funds other than
the WMMSC Monthly Remittance Amount, and with respect to the WMMSC Monthly
Remittance Amount, as directed in writing by WMMSC, either (i) hold funds on
deposit in the Distribution Account uninvested in a trust or deposit account of
the Trust Administrator with no liability for interest or other compensation
thereon, except as otherwise agreed in writing with WMMSC, or (ii) invest funds
on deposit in the Distribution Account in Permitted Investments, which Permitted
Investments shall mature not later than the Business Day next preceding the
Distribution Date (except that if such Permitted Investment is an obligation of
or is managed by the institution that maintains such fund or account, then such
Permitted Investment shall mature not later than such Distribution Date).
Permitted Investments in respect of the Collection Account or the Distribution
Account shall not be sold or disposed of prior to their maturity. All such
Permitted Investments shall be made in the name of the Trustee, for the benefit
of the Certificateholders. All income and gain net of any losses realized from
any such investment of funds on deposit in the Collection Account shall be for
the benefit of the Master Servicer as Master Servicing Compensation and shall be
remitted to it monthly as provided herein. The amount of any realized losses in
the Collection Account incurred in any such account in respect of any such
investments shall promptly be deposited by the Master Servicer (from its own
funds without any right of reimbursement) in the Collection Account or paid to
the Trustee by wire transfer of immediately available funds for deposit into the
Distribution Account. All income and gain (net of any losses realized from any
such investment of funds on deposit in the Distribution Account and net of any
WMMSC Investment Earnings Amount) shall be for the benefit of the Trust
Administrator as compensation and shall be remitted to it monthly as provided
herein. The amount of any realized losses in the Distribution Account incurred
in any such account in respect of any such investments shall promptly be
deposited by the Trust Administrator or WMMSC, as applicable, in the
Distribution Account. The Trust Administrator shall not be liable for the amount
of any loss incurred in respect of any investment or lack of investment of funds
held in the Collection Account (except to the extent the Trust Administrator is
the obligor and has defaulted thereon), or the Distribution Account (to the
extent funds in the Distribution Account are being invested at the direction of
WMMSC), and made in accordance with this Section 3.07. In the absence of written
instructions by (i) the Trust Administrator, with respect to funds other than
any WMMSC Monthly Remittance Amount, or (ii) WMMSC, with respect to any WMMSC
Monthly Remittance Amount, to invest funds held in the Distribution Account, all
funds on deposit therein shall remain uninvested.

            (f) The Master Servicer shall give notice to the Trustee, the Trust
Administrator, each Rating Agency and the Depositor of any proposed change of
the location of the Collection Account prior to any change thereof. The Trust
Administrator shall give notice to the Trustee, the Master Servicer, each Rating
Agency and the Depositor of any proposed change of the location of the
Distribution Account prior to any change thereof.

            (g) Each of the Collection Account and Distribution Account shall at
all times be an Eligible Account, provided, that the Collection Account may be
deemed to be a sub-account of the Distribution Account. If at any time either
the Collection Account or Distribution Account ceases to be an Eligible Account,
the Master Servicer, the Trustee or the Trust Administrator, as applicable,
shall immediately establish and maintain a new Collection Account or
Distribution Account, as applicable, that is an Eligible Account, and shall
immediately transfer all funds on deposit in the former Collection Account or
Distribution Account, as applicable, to the new Collection Account or
Distribution Account, as applicable.

            Section 3.08 Collection of Taxes, Assessments and Similar Items;
Escrow Accounts. To the extent required by the related Servicing Agreement and
by the related Mortgage Note and not violative of current law, the Master
Servicer shall require each Servicer to establish and maintain one or more
accounts (each, an "Escrow Account") and deposit and retain therein all
collections from the Mortgagors (or advances by such Servicer) for the payment
of taxes, assessments, hazard insurance premiums or comparable items for the
account of the Mortgagors. Nothing herein shall require the Master Servicer to
compel a Servicer to establish an Escrow Account in violation of applicable law.

            Section 3.09 Access to Certain Documentation and Information
Regarding the Mortgage Loans. The Master Servicer and the Custodian shall afford
and the Master Servicer shall require the Servicers to afford the Depositor, the
Trustee and the Trust Administrator and their respective agents or
representatives reasonable access to all records and documentation regarding the
Mortgage Loans and all accounts, insurance information and other matters
relating to this Agreement or the Servicing Agreement, such access being
afforded without charge, but only upon reasonable request and during normal
business hours at the office designated by the Master Servicer, the applicable
Servicer or the Custodian to the extent set forth in the applicable Servicing
Agreement.

            Upon reasonable advance notice in writing, the Master Servicer and
the Custodian will provide or the Master Servicer shall require the Servicers,
to the extent set forth in the applicable Servicing Agreement, to provide to
each Certificateholder which is a savings and loan association, bank or
insurance company certain reports and reasonable access to information and
documentation regarding the Mortgage Loans sufficient to permit such
Certificateholder to comply with applicable regulations of the OTS or other
regulatory authorities with respect to investment in the Certificates; provided,
that the Master Servicer, the applicable Servicer or the Custodian shall be
entitled to be reimbursed by each such Certificateholder for actual expenses
incurred by the Master Servicer, the applicable Servicer or the Custodian in
providing such reports and access.

            Section 3.10 Permitted Withdrawals from the Collection Account and
Distribution Account. (a) The Master Servicer may from time to time make
withdrawals from the Collection Account for the following purposes:

            (i) to pay to the Servicers (to the extent not previously retained
      by them), the servicing compensation to which they are entitled pursuant
      to the applicable Servicing Agreements, and to pay to the Master Servicer,
      earnings on or investment income with respect to funds in or credited to
      the Collection Account;

            (ii) to reimburse each of the Servicers or the Master Servicer for
      unreimbursed Advances made by it, such right of reimbursement pursuant to
      this sub-clause (ii) being limited to amounts received on the Mortgage
      Loan(s) in respect of which any such Advance was made;

             (iii) to reimburse the Servicers or the Master Servicer for any
      Nonrecoverable Advance previously made;

            (iv) to reimburse the Servicers or the Master Servicer for Insured
      Expenses from the related Insurance Proceeds;

            (v) to reimburse the Servicers or the Master Servicer for (a)
      unreimbursed Servicing Advances, the Servicers' or the Master Servicer's
      right to reimbursement pursuant to this clause (a) with respect to any
      Mortgage Loan being limited to amounts received on such Mortgage Loan(s)
      which represent late recoveries of the payments for which such advances
      were made pursuant to Section 3.01 or Section 4.01 and (b) for unpaid
      Servicing Fees as provided in Section 3.15 hereof;

             (vi) to pay to the purchaser, with respect to each Mortgage Loan or
      property acquired in respect thereof that has been purchased pursuant to
      Section 2.02 or 2.03, all amounts received thereon after the date of such
      purchase;

             (vii) to reimburse the Transferor, the Master Servicer or the
      Depositor for expenses or indemnities incurred by any of them and
      reimbursable pursuant to Section 6.03 hereof;

            (viii)to withdraw any amount deposited in the Collection Account and
      not required to be deposited therein;

            (ix) on or prior to the Distribution Account Deposit Date, to (A)
      withdraw (i) an amount equal to the related Available Funds for such
      Distribution Date and (ii) on or after the Cross-Over Date only, any
      Recoveries received during the related Prepayment Period, and remit by
      wire transfer of immediately available funds such amounts to the Trust
      Administrator for deposit in the Distribution Account and (B) withdraw any
      Class P Prepayment Charges received and remit by wire transfer of
      immediately available funds such amounts to the Trust Administrator for
      deposit into the Distribution Account;

            (x) to reimburse the Master Servicer for any costs or expenses
      incurred by it and reimbursable pursuant to Section 3.02; and

            (xi) to clear and terminate the Collection Account upon termination
      of this Agreement pursuant to Section 10.01 hereof.

            The Master Servicer shall keep and maintain separate accounting, on
a Mortgage Loan by Mortgage Loan basis, for the purpose of justifying any
withdrawal from the Collection Account pursuant to such sub-clauses (i), (ii),
(iv), (v) and (vi). Prior to making any withdrawal from the Collection Account
pursuant to sub-clause (iii), the Master Servicer shall deliver to the Trust
Administrator an Officer's Certificate of a Master Servicing Officer indicating
the amount of any previous Advance determined by the Master Servicer to be a
Nonrecoverable Advance and identifying the related Mortgage Loans(s), and their
respective portions of such Nonrecoverable Advance.

            (b) The Trust Administrator shall withdraw funds from the
Distribution Account for distributions to Certificateholders, in the manner
specified in this Agreement (and withhold from the amounts so withdrawn, the
amount of any taxes that it is authorized to withhold pursuant to the last
paragraph of Section 8.11). In addition, the Trust Administrator may from time
to time make withdrawals from the Distribution Account for the following
purposes:

            (i) to pay to the Trust Administrator earnings on or investment
      income, if any, and to WMMSC any WMMSC Investment Earnings Amount, if any,
      with respect to funds in or credited to the Distribution Account;

            (ii) to withdraw and return to the Master Servicer any amount
      deposited in the Distribution Account and not required to be deposited
      therein in accordance with Section 3.07(d);

            (iii) to withdraw any indemnity, expense or other reimbursement owed
      to it or the Trustee pursuant to this Agreement, including, without
      limitation, Section 3.05, Section 7.02, Section 8.05 and Section 9.05; and

            (iv) to clear and terminate the Distribution Account upon
      termination of the Agreement pursuant to Section 10.01 hereof.

            Section 3.11 Maintenance of Hazard Insurance. (a) For each Mortgage
Loan, the Master Servicer shall enforce any obligation of the Servicers under
the related Servicing Agreements to maintain or cause to be maintained standard
fire and casualty insurance and, where applicable, flood insurance, all in
accordance with the provisions of the related Servicing Agreements. It is
understood and agreed that such insurance shall be with insurers meeting the
eligibility requirements set forth in the applicable Servicing Agreement and
that no earthquake or other additional insurance is to be required of any
Mortgagor or to be maintained on property acquired in respect of a defaulted
loan, other than pursuant to such applicable laws and regulations as shall at
any time be in force and as shall require such additional insurance.

            (b) Pursuant to Sections 3.07 and 3.08, any amounts collected by the
Master Servicer, or by any Servicer, under any insurance policies (other than
amounts to be applied to the restoration or repair of the property subject to
the related Mortgage or released to the Mortgagor in accordance with the
applicable Servicing Agreement) shall be deposited into the Collection Account,
subject to withdrawal pursuant to Sections 3.07 and 3.08. Any cost incurred by
the Master Servicer or any Servicer in maintaining any such insurance if the
Mortgagor defaults in its obligation to do so shall be added to the amount owing
under the Mortgage Loan where the terms of the Mortgage Loan so permit;
provided, however, that the addition of any such cost shall not be taken into
account for purposes of calculating the distributions to be made to
Certificateholders and shall be recoverable by the Master Servicer or such
Servicer pursuant to Sections 3.07 and 3.08.

            Section 3.12 Presentment of Claims and Collection of Proceeds. The
Master Servicer shall (to the extent provided in the applicable Servicing
Agreement) cause the related Servicer to prepare and present on behalf of the
Trustee and the Certificateholders all claims under the Insurance Policies and
take such actions (including the negotiation, settlement, compromise or
enforcement of the insured's claim) as shall be necessary to realize recovery
under such policies. Any proceeds disbursed to the Master Servicer (or disbursed
to a Servicer and remitted to the Master Servicer) in respect of such policies,
bonds or contracts shall be promptly deposited in the Collection Account upon
receipt, except that any amounts realized that are to be applied to the repair
or restoration of the related Mortgaged Property as a condition precedent to the
presentation of claims on the related Mortgage Loan to the insurer under any
applicable Insurance Policy need not be so deposited (or remitted).

            Section 3.13 Maintenance  


 
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