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Exhibit 99.1 EXECUTION COPY MORGAN STANLEY CAPITAL I INC. Depositor WELLS FARGO BANK, NATIONAL ASSOCIATION Master Servicer and Securities Administrator and LASALLE BANK NATIONAL ASSOCIATION Trustee and Custodian --------------------------- POOLING AND SERVICING AGREEMENT Dated as of March 1, 2007

Pooling and Servicing Agreement

Exhibit 99.1 EXECUTION COPY MORGAN STANLEY CAPITAL I INC. Depositor WELLS FARGO BANK, NATIONAL ASSOCIATION Master Servicer and Securities Administrator and LASALLE BANK NATIONAL ASSOCIATION Trustee and Custodian --------------------------- POOLING AND SERVICING AGREEMENT Dated as of March 1, 2007 | Document Parties: LASALLE BANK NATIONAL ASSOCIATION | MORGAN STANLEY CAPITAL I INC | MORGAN STANLEY MORTGAGE CAPITAL INC | WELLS FARGO BANK, NATIONAL ASSOCIATION You are currently viewing:
This Pooling and Servicing Agreement involves

LASALLE BANK NATIONAL ASSOCIATION | MORGAN STANLEY CAPITAL I INC | MORGAN STANLEY MORTGAGE CAPITAL INC | WELLS FARGO BANK, NATIONAL ASSOCIATION

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Title: Exhibit 99.1 EXECUTION COPY MORGAN STANLEY CAPITAL I INC. Depositor WELLS FARGO BANK, NATIONAL ASSOCIATION Master Servicer and Securities Administrator and LASALLE BANK NATIONAL ASSOCIATION Trustee and Custodian --------------------------- POOLING AND SERVICING AGREEMENT Dated as of March 1, 2007
Governing Law: New York     Date: 4/17/2007

Exhibit 99.1 EXECUTION COPY MORGAN STANLEY CAPITAL I INC. Depositor WELLS FARGO BANK, NATIONAL ASSOCIATION Master Servicer and Securities Administrator and LASALLE BANK NATIONAL ASSOCIATION Trustee and Custodian --------------------------- POOLING AND SERVICING AGREEMENT Dated as of March 1, 2007, Parties: lasalle bank national association , morgan stanley capital i inc , morgan stanley mortgage capital inc , wells fargo bank  national association
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                                                                  Exhibit 99.1


                                                                EXECUTION COPY


                         MORGAN STANLEY CAPITAL I INC.
                                   Depositor



                    WELLS FARGO BANK, NATIONAL ASSOCIATION
                 Master Servicer and Securities Administrator



                                      and



                       LASALLE BANK NATIONAL ASSOCIATION
                              Trustee and Custodian



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

                        POOLING AND SERVICING AGREEMENT
                           Dated as of March 1, 2007

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




                  MORGAN STANLEY MORTGAGE LOAN TRUST 2007-6XS

              MORTGAGE PASS-THROUGH CERTIFICATES, SERIES 2007-6XS

<PAGE>

<TABLE>
<CAPTION>
                                                  TABLE OF CONTENTS

                                                                                                                Page

<S>                                                                                                             <C>
ARTICLE I DEFINITIONS.............................................................................................3

Section 1.01. Definitions.........................................................................................3

ARTICLE II DECLARATION OF TRUST; ISSUANCE OF CERTIFICATES........................................................49

Section 2.01. Creation and Declaration of Trust Fund; Conveyance of Mortgage Loans...............................49
Section 2.02. Acceptance of Trust Fund by Trustee; Review of Documentation for Trust Fund........................52
Section 2.03. Representations and Warranties of the Depositor....................................................53
Section 2.04. Representations and Warranties of the Depositor and the Seller as to the Mortgage Loans............55
Section 2.05. Representations and Warranties of the Seller; Discovery of Breach; Repurchase or
              Substitution of Mortgage Loans.....................................................................55
Section 2.06. Grant Clause.......................................................................................61
Section 2.07. Depositor's Option to Purchase Breached Mortgage Loans.............................................62
Section 2.08. Release of Mortgage Documents for Servicing........................................................62

ARTICLE III THE CERTIFICATES.....................................................................................62

Section 3.01. The Certificates...................................................................................62
Section 3.02. Registration.......................................................................................63
Section 3.03. Transfer and Exchange of Certificates..............................................................63
Section 3.04. Cancellation of Certificates.......................................................................67
Section 3.05. Replacement of Certificates........................................................................67
Section 3.06. Persons Deemed Owners..............................................................................68
Section 3.07. Temporary Certificates.............................................................................68
Section 3.08. Appointment of Paying Agent........................................................................68
Section 3.09. Book-Entry Certificates............................................................................69

ARTICLE IV ADMINISTRATION OF THE TRUST FUND......................................................................70

Section 4.01. Custodial Accounts; Distribution Account...........................................................70
Section 4.02. Permitted Withdrawals from the Custodial Accounts and the Distribution Account.....................72
Section 4.03. [Reserved].........................................................................................73
Section 4.04. [Reserved].........................................................................................73
Section 4.05. Reports to Trustee and Certificateholders..........................................................73

ARTICLE V DISTRIBUTIONS TO HOLDERS OF CERTIFICATES...............................................................75

Section 5.01. Distributions Generally............................................................................75
Section 5.02. Priorities of Distribution.........................................................................76

<PAGE>

Section 5.03. Allocation of Principal Payments to the Group 1 Senior and the Group 2 Certificates................80
Section 5.04. Allocation of Losses...............................................................................84
Section 5.05. Advances by the Master Servicer....................................................................85
Section 5.06. Compensating Interest Payments.....................................................................85
Section 5.07. [Reserved].........................................................................................86
Section 5.08. [Reserved].........................................................................................86
Section 5.09. Determination of Pass-Through Rates for LIBOR Certificates.........................................86
Section 5.10   The Reserve Funds..................................................................................88
Section 5.11   The Corridor Contract..............................................................................90

ARTICLE VI CONCERNING THE TRUSTEE AND THE SECURITIES ADMINISTRATOR; EVENTS OF DEFAULT............................91

Section 6.01. Duties of Trustee and the Securities Administrator.................................................91
Section 6.02. Certain Matters Affecting the Trustee and the Securities Administrator.............................94
Section 6.03. Trustee and Securities Administrator Not Liable for Certificates...................................96
Section 6.04. Trustee and the Securities Administrator May Own Certificates......................................96
Section 6.05. Eligibility Requirements for Trustee...............................................................96
Section 6.06. Resignation and Removal of Trustee and the Securities Administrator................................97
Section 6.07. Successor Trustee and Successor Securities Administrator..........................................100
Section 6.08. Merger or Consolidation of Trustee or the Securities Administrator................................101
Section 6.09. Appointment of Co-Trustee, Separate Trustee or Custodian..........................................101
Section 6.10. Authenticating Agents.............................................................................103
Section 6.11. Indemnification of the Trustee and the Securities Administrator...................................104
Section 6.12. Fees and Expenses of the Master Servicer, Securities Administrator, the Trustee
              and the Custodian.................................................................................104
Section 6.13. Collection of Monies..............................................................................105
Section 6.14. Events of Default; Trustee To Act; Appointment of Successor.......................................105
Section 6.15. Additional Remedies of Trustee Upon Event of Default..............................................110
Section 6.16. Waiver of Defaults................................................................................110
Section 6.17. Notification to Holders...........................................................................110
Section 6.18. Directions by Certificateholders and Duties of Trustee During Event of Default....................111
Section 6.19. Action Upon Certain Failures of the Master Servicer and Upon Event of Default.....................111
Section 6.20. Preparation of Tax Returns and Other Reports......................................................111
Section 6.21. Certain Matters Regarding any Custodian Appointed Hereunder.......................................112

ARTICLE VII PURCHASE OF MORTGAGE LOANS AND TERMINATION OF THE TRUST FUND........................................114

Section 7.01. Purchase of Mortgage Loans; Termination of Trust Fund Upon Purchase or Liquidation of All
              Mortgage Loans....................................................................................114
Section 7.02. Procedure Upon Redemption of Trust Fund...........................................................115
Section 7.03. Additional Trust Fund Termination Requirements....................................................116



                                                         ii
<PAGE>

ARTICLE VIII RIGHTS OF CERTIFICATEHOLDERS.......................................................................117

Section 8.01. Limitation on Rights of Holders...................................................................117
Section 8.02. Access to List of Holders.........................................................................118
Section 8.03. Acts of Holders of Certificates...................................................................119

ARTICLE IX ADMINISTRATION AND SERVICING OF MORTGAGE LOANS BY THE MASTER SERVICER................................120

Section 9.01. Duties of the Master Servicer; Enforcement of Servicers' and Master Servicer's Obligations........120
Section 9.02. Assumption of Master Servicing by Trustee.........................................................122
Section 9.03. Representations and Warranties of the Master Servicer.............................................123
Section 9.04. Compensation to the Master Servicer...............................................................125
Section 9.05. Merger or Consolidation...........................................................................125
Section 9.06. Resignation of Master Servicer and Securities Administrator.......................................126
Section 9.07. Assignment or Delegation of Duties by the Master Servicer and Securities Administrator............126
Section 9.08. Limitation on Liability of the Master Servicer and Others.........................................127
Section 9.09. Indemnification; Third-Party Claims...............................................................128
Section 9.10. Eligibility Requirements for Securities Administrator.............................................128
Section 9.11. Annual Statement as to Compliance.................................................................129

ARTICLE X REMIC ADMINISTRATION..................................................................................129

Section 10.01. REMIC Administration.............................................................................129
Section 10.02. Prohibited Transactions and Activities...........................................................129
Section 10.03. Indemnification with Respect to Prohibited Transactions or Loss of REMIC Status..................132
Section 10.04. REO Property.....................................................................................133
Section 10.05. Fidelity.........................................................................................134

ARTICLE XI MISCELLANEOUS PROVISIONS.............................................................................134

Section 11.01. Binding Nature of Agreement; Assignment..........................................................134
Section 11.02. Entire Agreement.................................................................................134
Section 11.03. Amendment........................................................................................134
Section 11.04. Voting Rights....................................................................................135
Section 11.05. Provision of Information.........................................................................136
Section 11.06. Governing Law....................................................................................136
Section 11.07. Notices..........................................................................................136
Section 11.08. Severability of Provisions.......................................................................137
Section 11.09. Indulgences; No Waivers..........................................................................137
Section 11.10. Headings Not To Affect Interpretation............................................................137
Section 11.11. Benefits of Agreement............................................................................137
Section 11.12. Special Notices to the Rating Agencies...........................................................137
Section 11.13. Conflicts........................................................................................138



                                                        iii
<PAGE>

Section 11.14. Counterparts.....................................................................................138
Section 11.15. No Petitions.....................................................................................138
Section 11.16. Indemnification by Trust.........................................................................138

ARTICLE XII EXCHANGE ACT REPORTING..............................................................................139

Section 12.01. Filing Obligations...............................................................................139
Section 12.02. Form 10-D Reporting..............................................................................140
Section 12.03. Form 8-K Reporting...............................................................................142
Section 12.04. Form 10-K Reporting..............................................................................143
Section 12.05. Sarbanes-Oxley Certification.....................................................................144
Section 12.06. Reports on Assessment of Compliance and Attestation..............................................145
Section 12.07. Use of Subcontractors............................................................................146
Section 12.08. Indemnification by the Master Servicer and the Securities Administrator..........................147
Section 12.09. Indemnification by the Custodian.................................................................148
</TABLE>



                                                         iv
<PAGE>

                                  ATTACHMENTS

Exhibit A          Forms of Certificates
Exhibit B          Form of Residual Certificate Transfer Affidavit (Transferee)
Exhibit C          Form of Residual Certificate Transfer Affidavit (Transferor)
Exhibit D          [Reserved]
Exhibit E          List of Purchase and Servicing Agreements
Exhibit F          [Reserved]
Exhibit G          Assignment and Notice of Transfer with respect to each
                  Additional Collateral Mortgage Loan
Exhibit H          Form of Rule 144A Transfer Certificate
Exhibit I          Form of Purchaser's Letter for Institutional Accredited
                  Investors
Exhibit J          Form of ERISA Transfer Affidavit
Exhibit K          Form of Letter of Representations with the Depository Trust
                  Company
Exhibit L-1        Form of Initial Custodian Certification
Exhibit L-2         Form of Final Custodian Certification
Exhibit M          Request for Release of Documents
Exhibit N          Additional Disclosure Required Under Regulation AB
Exhibit O          Form of Servicing Criteria to be Addressed in Assessment of
                   Compliance Statement
Exhibit P          Additional Disclosure Notification
Exhibit Q          Glossary of Terms for Standard & Poor's LEVELS(R) Version
                  5.7 File Format
Exhibit R          Form of Lost Note Affidavit
Schedule A         Mortgage Loan Schedule
Schedule B         Principal Balances Schedule



                                      v
<PAGE>

      This POOLING AND SERVICING AGREEMENT, dated as of March 1, 2007 (the
"Agreement"), by and among MORGAN STANLEY CAPITAL I INC., a Delaware
corporation, as depositor (the "Depositor"), LASALLE BANK NATIONAL
ASSOCIATION, a national banking association, as trustee (the "Trustee"), and
as the custodian (the "Custodian") and WELLS FARGO BANK, NATIONAL ASSOCIATION,
in its separate capacities as master servicer (the "Master Servicer"), as
securities administrator (the "Securities Administrator") and, in its capacity
as Securities Administrator, as auction administrator (the "Auction
Administrator") and acknowledged by MORGAN STANLEY MORTGAGE CAPITAL INC., a
New York corporation, as seller (the "Seller"), for purposes of Section 2.05.

                                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. As provided herein, the Trustee
will make multiple elections to treat segregated pools of assets subject to
this Agreement for federal income tax purposes (other than the Additional
Collateral and the Reserve Funds) as the following two separate real estate
mortgage investment conduits (each, a "REMIC"): REMIC 1 and the Master REMIC.
REMIC 1 will consist of the Mortgage Loans, excluding any rights of the Trust
Fund in respect of the Additional Collateral, the Corridor Contract and the
assets held in the Reserve Funds. REMIC 1 will issue uncertificated REMIC
regular interests (the "REMIC 1 Regular Interests"). The REMIC 1 Regular
Interests will represent the "regular interests" in REMIC 1. The Class R-1
Interest will represent the single Class of "residual interest" in REMIC 1.

      The Trustee will hold the REMIC 1 Regular Interests for the benefit of
the Master REMIC. The Master REMIC will consist of the REMIC 1 Interests and
will be evidenced by the Certificates (other than the Class A-R Certificates),
which will constitute the regular interests in the Master REMIC (the "Regular
Certificates") and the Class MR Interest, which will represent the single
Class of "residual interest" in the Master REMIC. The Class A-R Certificates
will represent the beneficial ownership of each class of residual interests
created hereby. The "latest possible maturity date" for federal income tax
purposes of all regular and residual interests created hereunder will be the
Latest Possible Maturity Date.

REMIC 1

      The REMIC 1 Interests will have the Initial Principal Balances and
Pass-Through Rates as set forth in the following table:

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------------------------------------------
REMIC 1 Interests                    Initial Balance          Pass-Through Rate         Corresponding Certificate
--------------------------------------------------------------------------------------------------------------------

<PAGE>

<S>                                     <C>                       <C>              <C>                                 
1-1-A-1                                    (1)                       (2)           Class 1-A-1
--------------------------------------------------------------------------------------------------------------------
1-1-A-2-SS                                 (1)                        (2)           Class 1-A-2-SS
--------------------------------------------------------------------------------------------------------------------
1-1-A-2-M                                  (1)                       (2)           Class 1-A-2-M
--------------------------------------------------------------------------------------------------------------------
1-1-A-3-SS                                 (1)                       (2)           Class 1-A-3-SS
--------------------------------------------------------------------------------------------------------------------
1-1-A-3-M                                  (1)                       (2)           Class 1-A-3-M
--------------------------------------------------------------------------------------------------------------------
1-2-A-1-SS                                 (1)                       (2)           Class 2-A-1-SS
--------------------------------------------------------------------------------------------------------------------
1-2-A-1-M                                   (1)                       (2)           Class 2-A-1-M
--------------------------------------------------------------------------------------------------------------------
1-2-A-2-SS                                 (1)                        (2)           Class 2-A-2-SS
--------------------------------------------------------------------------------------------------------------------
1-2-A-3-SS                                 (1)                       (2)           Class 2-A-3-SS
--------------------------------------------------------------------------------------------------------------------
1-2-A-4-SS                                 (1)                       (2)           Class 2-A-4-SS
--------------------------------------------------------------------------------------------------------------------
1-2-A-5-SS                                 (1)                       (2)           Class 2-A-5-SS
--------------------------------------------------------------------------------------------------------------------
1-2-A-6-SS                                 (1)                       (2)           Class 2-A-6-SS
--------------------------------------------------------------------------------------------------------------------
1-2-A-6-M                                   (1)                       (2)           Class 2-A-6-M
--------------------------------------------------------------------------------------------------------------------
1-2-A-7-M                                  (1)                       (2)            Class 2-A-7-M
--------------------------------------------------------------------------------------------------------------------
  1-M-1                                     (1)                       (2)           Class M-1
--------------------------------------------------------------------------------------------------------------------
  1-M-2                                     (1)                       (2)           Class M-2
--------------------------------------------------------------------------------------------------------------------
  1-M-3                                     (1)                       (2)           Class M-3
--------------------------------------------------------------------------------------------------------------------
  1-M-4                                      (1)                       (2)           Class M-4
--------------------------------------------------------------------------------------------------------------------
  1-M-5                                     (1)                        (2)           Class M-5
--------------------------------------------------------------------------------------------------------------------
  1-M-6                                     (1)                       (2)           Class M-6
--------------------------------------------------------------------------------------------------------------------
  1-B-1                                     (1)                       (2)           Class B-1
--------------------------------------------------------------------------------------------------------------------
  1-B-2                                     (1)                       (2)           Class B-2
--------------------------------------------------------------------------------------------------------------------
  1-B-3                                     (1)                       (2)           Class B-3
--------------------------------------------------------------------------------------------------------------------
1-Accrual                                  (1)                        (2)           N/A
--------------------------------------------------------------------------------------------------------------------
1-P                                      $1,000                      (3)           Class P
--------------------------------------------------------------------------------------------------------------------
1-$100                                    $100                       (4)           Class A-R
--------------------------------------------------------------------------------------------------------------------
R-1                                        (5)                     N/A(5)          N/A
--------------------------------------------------------------------------------------------------------------------
</TABLE>
---------------
(1)    For each Distribution Date, following the allocation of scheduled
      principal, prepayments and Realized Losses: (i) each such Class of
      Interests (other than the Class 1-Accrual Interest) will have a
      principal balance equal to 50% of the principal balance in respect of
      the Corresponding Class of Certificates and (ii) the Class 1-Accrual
      Interests will have a principal balance equal to the excess of the
      principal balance of Mortgage Loans over the principal balance of the
      other REMIC 1 Interests (other than the Class 1-P, Class 1-$100 and
      Class R-1 Interests).

(2)    The interest rate with respect to any Distribution Date (and the related
      Interest Accrual Period) for this REMIC Interest is a per annum rate
      equal to the Net WAC Pass-Through Rate.

(3)    The Class 1-P Interest will not be entitled to any interest, but will be
      entitled to 100% of any prepayment premiums paid on the Mortgage Loans.

(4)    For each Distribution Date, following the allocation of scheduled
      principal, prepayments and Realized Losses, the Class 1-$100 will equal
      the principal balance and have the Pass-Through Rate in respect of the
      Class A-R Certificates.



                                       2
<PAGE>

(5)    The R-1 Interest is the sole Class of residual interest in REMIC 1. It
      pays no interest or principal.

                               The Master REMIC
                               ----------------

      The following table sets forth characteristics of the Master REMIC
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
and, in addition, one Residual Certificate representing the Tax Matters Person
Certificate may be issued in a different amount):

<TABLE>
<CAPTION>
======================== ======================= =========================== ====================== ======================
                                                        Pass-Through                                 
                                Initial Class                Rate                                       Integral Multiples
   Class Designation           Principal Balance          (per annum)            Minimum Denomination    in Excess of Minimum
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
<S>                              <C>                     <C>                             <C>                     <C>      
Class 1-A-1                      $119,712,000.00              (1)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 1-A-2-SS                    $58,014,000.00              (2)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 1-A-2-M                      $6,447,000.00              (3)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 1-A-3-SS                    $41,438,000.00              (4)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 1-A-3-M                      $4,605,000.00              (5)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 2-A-1-SS                    $97,804,000.00              (6)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 2-A-1-M                     $24,451,000.00              (6)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 2-A-2-SS                    $24,194,000.00              (7)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 2-A-3-SS                    $35,725,000.00              (8)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 2-A-4-SS                    $37,189,000.00              (9)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 2-A-5-SS                     $21,610,000.00              (10)                       $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 2-A-6-SS                     $25,416,000.00              (11)                       $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 2-A-6-M                      $2,825,000.00              (12)                       $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class 2-A-7-M                     $13,191,000.00              (13)                       $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class A-R (14)                           $100.00            6.81278%                     (15)                    (15)
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class M-1                          $8,748,000.00              (6)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class M-2                          $4,647,000.00              (6)                        $25,000.00               $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class M-3                          $3,007,000.00              (6)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class M-4                          $1,913,000.00              (6)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class M-5                          $1,913,000.00              (6)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class M-6                          $1,913,000.00              (6)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class B-1                          $1,913,000.00              (6)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class B-2                          $1,913,000.00              (6)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class B-3                          $2,733,000.00              (6)                        $25,000.00              $1,000.00
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class P                               $1,000.00               (16)                          $1,000.00            N/A
------------------------ ----------------------- --------------------------- ---------------------- ----------------------
Class OC                           (17)                       (17)                           (18)               (18)
======================== ======================= =========================== ====================== ======================
</TABLE>
------------------------------------------
(1)    Interest will accrue on the Class 1-A-1 Certificates during each
      Interest Accrual Period at a rate equal to the least of (i) one-month
      LIBOR plus 0.51000%, (ii) 6.10000% and (iii) the applicable related Net
      WAC Pass-Through Rate for such Distribution Date. The



                                      3
<PAGE>

      Pass-Through Rate for the Class 1-A-1 Certificates for the Interest
      Accrual Period related to the first Distribution Date will be 5.83%.

(2)    The Pass-Through Rate for the Class 1-A-2-SS Certificates for the
      Interest Accrual Period related to any Distribution Date on or prior to
      the Initial Optional Termination Date will be a per annum rate equal to
      the lesser of (i) 5.50000% and (ii) the Net WAC Pass-Through Rate.
      Beginning with the Interest Accrual Period related to the Distribution
      Date immediately following the Initial Optional Termination Date, the
      Pass-Through Rate for the Class 1-A-2-SS Certificates will be a per
      annum rate equal to the lesser of (i) 6.00000% and (ii) the Net WAC
      Pass-Through Rate. The Pass-Through Rate for the Class 1-A-2-SS
      Certificates for the first Interest Accrual Period will be a per annum
      rate of 5.50000%.

(3)    The Pass-Through Rate for the Class 1-A-2-M Certificates for the
      Interest Accrual Period related to any Distribution Date on or prior to
      the Initial Optional Termination Date will be a per annum rate equal to
       the lesser of (i) 5.75000% and (ii) the Net WAC Pass-Through Rate.
      Beginning with the Interest Accrual Period related to the Distribution
      Date immediately following the Initial Optional Termination Date, the
      Pass-Through Rate for the Class 1-A-2-M Certificates will be a per annum
      rate equal to the lesser of (i) 6.25000% and (ii) the Net WAC
      Pass-Through Rate. The Pass-Through Rate for the Class 1-A-2-M
      Certificates for the first Interest Accrual Period will be a per annum
      rate of 5.75000%.

(4)    The Pass-Through Rate for the Class 1-A-3-SS Certificates for the
      Interest Accrual Period related to any Distribution Date on or prior to
      the Initial Optional Termination Date will be a per annum rate equal to
      the lesser of (i) 5.70238% and (ii) the Net WAC Pass-Through Rate.
      Beginning with the Interest Accrual Period related to the Distribution
      Date immediately following the Initial Optional Termination Date, the
      Pass-Through Rate for the Class 1-A-3-SS Certificates will be a per
      annum rate equal to the lesser of (i) 6.20238% and (ii) the Net WAC
      Pass-Through Rate. The Pass-Through Rate for the Class 1-A-3-SS
      Certificates for the first Interest Accrual Period will be a per annum
      rate of 5.70238%.

(5)    The Pass-Through Rate for the Class 1-A-3-M Certificates for the
      Interest Accrual Period related to any Distribution Date on or prior to
      the Initial Optional Termination Date will be a per annum rate equal to
      the lesser of (i) 5.75000% and (ii) the Net WAC Pass-Through Rate.
      Beginning with the Interest Accrual Period related to the Distribution
      Date immediately following the Initial Optional Termination Date, the
      Pass-Through Rate for the Class 1-A-3-M Certificates will be a per annum
      rate equal to the lesser of (i) 6.25000% and (ii) the Net WAC
      Pass-Through Rate. The Pass-Through Rate for the Class 1-A-3-M
      Certificates for the first Interest Accrual Period will be a per annum
      rate of 5.75000%.

(6)    Interest will accrue on each Class of LIBOR Certificates (other than the
      Class 1-A-1, Class 2-A-1-SS and Class 2-A-1-M Certificates) during each
      Interest Accrual Period at a rate equal to the least of LIBOR plus the
      Pass-Through Margin for such Class for such Distribution Date, the
      applicable related Net WAC Pass-Through Rate for such



                                      4
<PAGE>

      Distribution Date and 11.00000%. The Pass-Through Rate for the Class of
      Certificates for the Interest Accrual Period related to the first
      Distribution Date will be as indicated in column (3) in the definition
      of "Pass-Through Margin".

(7)    The Pass-Through Rate for the Class 2-A-2-SS Certificates for the
      Interest Accrual Period related to any Distribution Date on or prior to
      the Initial Optional Termination Date will be a per annum rate equal to
      the lesser of (i) 5.64587% and (ii) the Net WAC Pass-Through Rate.
       Beginning with the Interest Accrual Period related to the Distribution
      Date immediately following the Initial Optional Termination Date, the
      Pass-Through Rate for the Class 2-A-2-SS Certificates will be a per
      annum rate equal to the lesser of (i) 6.14587% and (ii) the Net WAC
      Pass-Through Rate. The Pass-Through Rate for the Class 2-A-2-SS
      Certificates for the first Interest Accrual Period will be a per annum
      rate of 5.64587%.

(8)    The Pass-Through Rate for the Class 2-A-3-SS Certificates for the
      Interest Accrual Period related to any Distribution Date on or prior to
      the Initial Optional Termination Date will be a per annum rate equal to
      the lesser of (i) 5.76849% and (ii) the Net WAC Pass-Through Rate.
      Beginning with the Interest Accrual Period related to the Distribution
      Date immediately following the Initial Optional Termination Date, the
      Pass-Through Rate for the Class 2-A-3-SS Certificates will be a per
      annum rate equal to the lesser of (i) 6.26849% and (ii) the Net WAC
      Pass-Through Rate. The Pass-Through Rate for the Class 2-A-3-SS
      Certificates for the first Interest Accrual Period will be a per annum
      rate of 5.76849%.

(9)    The Pass-Through Rate for the Class 2-A-4-SS Certificates for the
      Interest Accrual Period related to any Distribution Date on or prior to
      the Initial Optional Termination Date will be a per annum rate equal to
      the lesser of (i) 5.96003% and (ii) the Net WAC Pass-Through Rate.
      Beginning with the Interest Accrual Period related to the Distribution
      Date immediately following the Initial Optional Termination Date, the
      Pass-Through Rate for the Class 2-A-4-SS Certificates will be a per
      annum rate equal to the lesser of (i) 6.46003% and (ii) the Net WAC
      Pass-Through Rate. The Pass-Through Rate for the Class 2-A-4-SS
      Certificates for the first Interest Accrual Period will be a per annum
      rate of 5.96003%.

(10)   The Pass-Through Rate for the Class 2-A-5-SS Certificates for the
      Interest Accrual Period related to any Distribution Date on or prior to
      the Initial Optional Termination Date will be a per annum rate equal to
      the lesser of (i) 6.00000% and (ii) the Net WAC Pass-Through Rate.
      Beginning with the Interest Accrual Period related to the Distribution
      Date immediately following the Initial Optional Termination Date, the
      Pass-Through Rate for the Class 2-A-5-SS Certificates will be a per
      annum rate equal to the lesser of (i) 6.50000% and (ii) the Net WAC
      Pass-Through Rate. The Pass-Through Rate for the Class 2-A-5-SS
      Certificates for the first Interest Accrual Period will be a per annum
      rate of 5.96003%.

(11)   The Pass-Through Rate for the Class 2-A-6-SS Certificates for the
      Interest Accrual Period related to any Distribution Date on or prior to
      the Initial Optional Termination Date will be a per annum rate equal to
      the lesser of (i) 5.70097% and (ii) the Net WAC



                                      5
<PAGE>

      Pass-Through Rate. Beginning with the Interest Accrual Period related to
      the Distribution Date immediately following the Initial Optional
      Termination Date, the Pass-Through Rate for the Class 2-A-6-SS
      Certificates will be a per annum rate equal to the lesser of (i)
      6.20097% and (ii) the Net WAC Pass-Through Rate. The Pass-Through Rate
      for the Class 2-A-6-SS Certificates for the first Interest Accrual
      Period will be a per annum rate of 5.70097%.

(12)   The Pass-Through Rate for the Class 2-A-6-M Certificates for the
      Interest Accrual Period related to any Distribution Date on or prior to
      the Initial Optional Termination Date will be a per annum rate equal to
      the lesser of (i) 5.75000% and (ii) the Net WAC Pass-Through Rate.
      Beginning with the Interest Accrual Period related to the Distribution
      Date immediately following the Initial Optional Termination Date, the
      Pass-Through Rate for the Class 2-A-6-M Certificates will be a per annum
      rate equal to the lesser of (i) 6.25000% and (ii) the Net WAC
      Pass-Through Rate. The Pass-Through Rate for the Class 2-A-6-M
      Certificates for the first Interest Accrual Period will be a per annum
      rate of 5.75000%.

(13)   The Pass-Through Rate for the Class 2-A-7-M Certificates for the
      Interest Accrual Period related to any Distribution Date on or prior to
      the Initial Optional Termination Date will be a per annum rate equal to
      the lesser of (i) 6.16220% and (ii) the Net WAC Pass-Through Rate.
      Beginning with the Interest Accrual Period related to the Distribution
      Date immediately following the Initial Optional Termination Date, the
      Pass-Through Rate for the Class 2-A-7-M Certificates will be a per annum
      rate equal to the lesser of (i) 6.66220% and (ii) the Net WAC
      Pass-Through Rate. The Pass-Through Rate for the Class 2-A-7-M
      Certificates for the first Interest Accrual Period will be a per annum
      rate of 6.16220%.

(14)   The Class A-R Certificates represent the sole Class of residual interest
      in each REMIC.

(15)   The Class A-R Certificate shall be issued as two separate certificates,
      one with an initial Certificate Balance of $99.99 and the Tax Matters
      Person Certificate with an initial Certificate Balance of $0.01.

(16)   The Class P Certificates will not be entitled to any interest, but will
      be entitled to 100% of any prepayment premiums paid on the Mortgage
      Loans.

(17)   For each Interest Accrual Period and for all federal income tax
      purposes, the Class OC Certificates will represent two classes of
      regular interests issued by the Master REMIC, (i) a class that does not
      accrue interest and has a principal balance equal to the
      Overcollateralized Amount as of the Closing Date, and (ii) a regular
      interest that accrues a specified portion of the interest on the REMIC 1
      Interests equal to the excess of the REMIC 1 Cap over the product of two
      and the weighted average interest rate of the REMIC 1 Regular Interests,
      with each Class other than the Class 1-Accrual Interest subject to a cap
      equal to the Pass-Through Rate of the corresponding Master REMIC Class
      and the Class 1-Accrual Interest subject to a cap of 0.00%. The
      Pass-Through Rate of the Class OC Certificates shall be a rate
      sufficient to entitle it to all interest accrued on the Mortgage Loans,
      less the interest accrued on the other interests issued by the Master



                                      6
<PAGE>

      REMIC. The Class OC Distributable Amount for any Distribution Date is
      payable from current interest on the Mortgage Loans and any
      Overcollateralization Release Amount for that Distribution Date. The
      Class OC Certificates will represent beneficial ownership of a regular
      interest issued by the Master REMIC, subject to the obligation to make
      payments in respect of Basis Risk Carry Forward Amounts. For federal
      income tax purposes, the Class OC Certificateholders' obligation to make
      payments of Basis Risk Carry Forward Amounts will be treated as payments
      made pursuant to an interest rate cap contract written by the Class OC
      Certificateholders in favor of each Class of Certificates.

(18)   The Class OC Certificates will be issued as a single Class of
      Certificates.

      The foregoing provisions in the Preliminary Statement are intended to
cause net interest and principal collections in respect of the Mortgage Loans
to be distributed from REMIC 1 to the Master REMIC and from the Master REMIC
to each Class of Certificates. The Preliminary Statement will be interpreted
and applied consistently with such intent.

       For any purpose for which the Pass-Through Rates is calculated, the
interest rate on the Mortgage Loans shall be appropriately adjusted to account
for the difference between the monthly day count convention of the Mortgage
Loans and the monthly day count convention of the regular interests issued by
each of the REMICs. For purposes of calculating the Pass-Through Rates for
each of the interests issued by each REMIC created hereunder (other than the
Master REMIC) such rates shall be adjusted to equal a monthly day count
convention based on a 30 day month for each Due Period and a 360-day year so
that the Mortgage Loans and all regular interests will be using the same
monthly day count convention.

The fiscal year of each REMIC will end on December 31.



                                       7
<PAGE>

Set forth below are designations of Classes or Components of Certificates and
other defined terms to the categories used herein:

<TABLE>
<CAPTION>
<S>                                              <C>
Accretion Directed Certificates............      None.

Accretion Directed Components..............      None.

Accrual Certificates.......................      None.

Accrual Components.........................      None.

Book-Entry Certificates....................       All Classes of Certificates other than the Definitive Certificates.

Group 1 Senior Certificates................      Class 1-A-1, Class 1-A-2-SS, Class 1-A-2-M, Class 1-A-3-SS and Class
                                                1-A-3-M Certificates.

Group 2 Senior Certificates................      Class 2-A-1-SS, Class 2-A-1-M, Class 2-A-2-SS, Class 2-A-3-SS, Class
                                                2-A-4-SS, Class 2-A-5-SS, Class 2-A-6-SS, Class 2-A-6-M and Class
                                                 2-A-7-M Certificates.

Class B Certificates.......................      Class B-1, Class B-2 and Class B-3 Certificates.

Class M Certificates.......................      Class M-1, Class M-2, Class M-3, Class M-4, Class M-5 and Class M-6
                                                Certificates.

Class M Senior Certificates................      Class M-1, Class M-2 and Class M-3 Certificates

Class P Certificates.......................      Class P Certificates.

Component Certificates.....................      None.

Components.................................      For purposes of calculating distributions of principal and/or interest,
                                                the Component Certificates, if any, will be comprised of multiple
                                                payment components having the designations, Initial Component Balances
                                                or Notional Amounts, as applicable, and Pass-Through Rates set forth
                                                 below:

                                                                          Initial Component
                                                  Destination              Principal Balance     Pass-Through Rate
                                                      N/A                         N/A                    N/A



                                                           8
<PAGE>

Definitive Certificates....................      Private Certificates and the Residual Certificates.

Delay Certificates.........................      All interest-bearing Classes of Certificates other than the Non-Delay
                                                Certificates, if any.

ERISA-Restricted Certificates..............      The Residual Certificates and Private Certificates; and any Certificate
                                                of a Class that ceases to satisfy the applicable rating requirement
                                                under the Underwriter's Exemption.

Floating Rate Certificates.................      Class 1-A-1, Class 2-A-1-SS and Class 2-A-1-M Certificates and
                                                Subordinated Certificates.

Senior Certificates........................       Class A-R Certificates and Group 1 Senior Certificates and Group 2
                                                Senior Certificates.

Senior Certificate Group...................      Group 1 Senior Certificates and Group 2 Senior Certificates.

Subordinated Certificates..................      Class M and Class B Certificates.

Inverse Floating Rate Certificates.........      None.

LIBOR Certificates.........................      Floating Rate and Inverse Floating Rate Certificates.

Non-Delay Certificates.....................      The LIBOR Certificates.

Notional Amount Certificates...............      None.

Notional Amount Components.................      None.

Offered Certificates.......................      All Classes of Certificates other than the Private Certificates.

Planned Principal Classes..................      None.

Principal Only Certificates................      None.

Private Certificates.......................      Class P and Class OC Certificates.

Rating Agencies............................      S&P and Moody's.

Regular Certificates.......................      All Classes of Certificates, other than the Residual Certificates.

Residual Certificates......................      Class A-R Certificates.

Scheduled Principal Classes................       None.

Targeted Principal Classes.................      None.

Underwriter................................      Morgan Stanley & Co. Incorporated.
</TABLE>

      With respect to any of the foregoing designations as to which the
corresponding reference is "None," all defined terms and provisions herein
relating solely to such designations shall be of



                                      9
<PAGE>

no force or effect, and any calculations herein incorporating references to
such designations shall be interpreted without reference to such designations
and amounts. 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.

      The following words and phrases, unless the context otherwise requires,
shall have the following meanings:

      Accountant: A Person engaged in the practice of accounting who (except
when this Agreement provides that an Accountant must be Independent) may be
employed by or affiliated with the Depositor or an Affiliate of the Depositor.

      Accretion Directed Certificates: As specified in the Preliminary
Statement.

       Accretion Direction Rule: Not applicable.

      Accrual Amount: Not applicable.

      Accrual Certificates: As specified in the Preliminary Statement.

      Accrual Components: As specified in the Preliminary Statement.

      Accrual Termination Date: Not applicable.

      Acknowledgements: The Assignment, Assumption and Recognition Agreements,
each dated as of March 1, 2007, assigning rights under the Purchase and
Servicing Agreements from the Seller to the Depositor and from the Depositor
to the Trustee, for the benefit of the Certificateholders.

      Act: The Securities Act of 1933, as amended.

      Additional Collateral: With respect to any Additional Collateral
Mortgage Loan, the marketable securities and other acceptable collateral
pledged as collateral pursuant to the related pledge agreements.

      Additional Collateral Mortgage Loan: Each Mortgage Loan identified as
such in the Mortgage Loan Schedule.

      Additional Form 10-D Disclosure: As defined in Section 12.02 hereof.

      Additional Form 10-K Disclosure: As defined in Section 12.04 hereof.



                                      3
<PAGE>

      Additional Servicer: Each affiliate of each Servicer that services any
of the Mortgage Loans and each Person who is not an affiliate of the any
Servicer, who services 10% or more of the Mortgage Loans. For clarification
purposes, the Master Servicer and the Securities Administrator are Additional
Servicers.

      Adjustment Date: Not applicable.

      Advance: With respect to a Mortgage Loan, the payments required to be
made by the Master Servicer or the applicable Servicer with respect to any
Distribution Date pursuant to this Agreement or the applicable Purchase and
Servicing Agreement, as applicable, the amount of any such payment being equal
to the aggregate of the payments of principal and interest (net of the
applicable Servicing Fee and net of any net income in the case of any REO
Property) on the Mortgage Loans that were due on the related Due Date and not
received as of the close of business on the related Determination Date, less
the aggregate amount of any such delinquent payments that the Master Servicer
or the applicable Servicer has determined would constitute Nonrecoverable
Advances if advanced.

      Adverse REMIC Event: Either (i) loss of status as a REMIC, within the
meaning of Section 860D of the Code, for any group of assets identified as a
REMIC in the Preliminary Statement to this Agreement, or (ii) imposition of
any tax, including the tax imposed under Section 860F(a)(1) on prohibited
transactions, and the tax imposed under Section 860G(d) on certain
contributions to a REMIC, on any REMIC created hereunder to the extent such
tax would be payable from assets held as part of the Trust Fund.

      Affiliate: With respect to any specified Person, any other Person
controlling or controlled by or under common control with such specified
Person. For the purposes of this definition, "control" when used with respect
to any specified Person means the power to direct the management and policies
of such Person, directly or indirectly, whether through the ownership of
voting securities, by contract or otherwise; and the terms "controlling" and
"controlled" have meanings correlative to the foregoing.

      Aggregate Certificate Group: Not applicable.

      Aggregate Expense Rate: With respect to any Mortgage Loan, the
applicable Servicing Fee Rate and, with respect to any LPMI Mortgage Loan, the
interest premium charged by the mortgagee to obtain or maintain any Primary
Mortgage Insurance Policy.

      Aggregate Planned Balance: With respect to any group of Planned
Principal Classes or Components and any Distribution Date, the amount set
forth for such group for such Distribution Date in Schedule B hereto.

      Aggregate Targeted Balance: With respect to any group of Targeted
Principal Classes or Components and any Distribution Date, the amount set
forth for such group for such Distribution Date in Schedule B hereto.

      Aggregate Voting Interests: The aggregate of the Voting Interests of all
the Certificates under this Agreement.



                                      4
<PAGE>

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

      Allocable Share: Not applicable.

      American Home Mortgage Loan: Each Mortgage Loan originated by American
Home Mortgage Corporation and listed on the Mortgage Loan Schedule.

      American Home Purchase Agreement: The Mortgage Loan Purchase and
Warranties Agreement listed in Exhibit E hereto between the Seller and
American Home Mortgage Corporation.

      Amount Held for Future Distribution: As to any Distribution Date and the
Mortgage Loans in an Loan Group, the aggregate amount related to that Loan
Group held in the Custodial Accounts at the close of business on the related
Determination Date on account of (i) Principal Prepayments received on the
Mortgage Loans in that Loan Group after the related Prepayment Period and
Liquidation Proceeds and Subsequent Recoveries related to the Mortgage Loans
in that Loan Group received in the month of such Distribution Date and (ii)
all Scheduled Payments related to the Mortgage Loans in that Loan Group due
after the related Due Date.

      Applicable Credit Support Percentage: Not applicable.

      Applied Loss Amount: As to any Distribution Date, with respect to the
Subordinated Certificates and the Class OC Certificates, the excess, if any,
of (i) the aggregate Class Principal Balances of the Certificates, after
giving effect to all Realized Losses with respect to the Mortgage Loans during
the Due Period for such Distribution Date and payments of principal on such
Distribution Date over (ii) the aggregate Stated Principal Balance of the
Mortgage Loans for such Distribution Date.

      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.

      Assets: As such term is used with respect to any Auction, as defined in
Section 7.01(b) hereof.

      Assignment of Mortgage: An assignment of the 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 the sale of the Mortgage to the Trustee, which assignment, notice of
transfer or equivalent instrument may be in the form of one or more blanket
assignments covering the Mortgage Loans secured by Mortgaged Properties
located in the same jurisdiction, if permitted by law; provided, however, that
the Trustee shall not be responsible for determining whether any such
assignment is in recordable form or sufficient under the laws of the
applicable jurisdiction to reflect the sale of the Mortgage to the Trustee.



                                      5
<PAGE>

      Assignment of Proprietary Lease: With respect to a Cooperative Loan, an
assignment of the Proprietary Lease sufficient under the laws of the
jurisdiction wherein the related Cooperative Unit is located to reflect the
assignment of such Proprietary Lease; provided, however, that the Trustee
shall not be responsible for determining whether such assignment is sufficient
to reflect the assignment of the Proprietary Lease.

      Assignment of Recognition Agreement: With respect to a Cooperative Loan,
an assignment of the Recognition Agreement sufficient under the laws of the
jurisdiction wherein the related Cooperative Unit is located to reflect the
assignment of such Recognition Agreement; provided, however, that the Trustee
shall not be responsible for determining whether such assignment is sufficient
to reflect the assignment of the Recognition Agreement.

      Auction: As defined in Section 7.01(b) hereof.

      Auction Administrator: The Securities Administrator, or any successor in
interest, or if any successor Auction Administrator shall be appointed as
herein provided, then such successor Auction Administrator.

      Auction Date: As defined in Section 7.01(b) hereof.

      Auction Excess Proceeds: With respect to an Auction Sale, the excess of
the Mortgage Loan Auction Price paid by the Auction Purchaser over the Minimum
Bid Price.

      Auction Purchaser: As defined in Section 7.01(b) hereof. For the
avoidance of doubt, the Auction Purchaser cannot be the Seller or an Affiliate
of the Seller.

      Auction Sale: As defined in Section 7.01(b) hereof.

      Authenticating Agent: Any authenticating agent appointed pursuant to
Section 6.10 until any successor authenticating agent for the Certificates is
named, and thereafter "Authenticating Agent" shall mean any such successor.
The initial Authenticating Agent shall be the Securities Administrator under
this Agreement.

      Authorized Officer: Any Person who may execute an Officer's Certificate
on behalf of the Depositor.

      Available Distribution Amount: For any Distribution Date and the
Certificates, the sum of the following amounts:

      (1) the total amount of all cash received by or on behalf of each
Servicer with respect to the Mortgage Loans serviced by it and received by the
Master Servicer by the related Servicer Remittance Date and not previously
distributed (including Liquidation Proceeds, Subsequent Recoveries,
condemnation proceeds and Insurance Proceeds with respect to the Mortgage
Loans), except:

o      all scheduled payments of principal and related interest collected on the
    Mortgage Loans but due on a date after the related Due Date;



                                      6
<PAGE>

o      all partial Principal Prepayments received with respect to the Mortgage
    Loans after the related Prepayment Period, together with all related
    interest accrued on such Mortgage Loans;

o      all Prepayment Penalties received in connection with the Mortgage Loans;

o      all Principal Prepayments in Full received with respect to the Mortgage
    Loans after the related Prepayment Period, together with all related
    interest accrued on such Mortgage Loans;

o      Liquidation Proceeds, condemnation proceeds and Insurance Proceeds
    received on such Mortgage Loans after the previous calendar month;

o      all amounts reimbursable to a Servicer pursuant to the terms of the
    related Purchase and Servicing Agreement or this Agreement, as
    applicable, or to the Master Servicer, the Securities Administrator, the
    Trustee and/or the Custodian pursuant to the terms of this Agreement;

o      reinvestment income on the balance of funds, if any, in the Custodial
    Accounts or Distribution Account; and

o      any fees payable to the Servicers and the Master Servicer, in each case
    with respect to the Mortgage Loans;

      (2) all Advances on the Mortgage Loans made by each Servicer and/or the
Master Servicer for that Distribution Date;

      (3) any amounts paid as Compensating Interest with respect to the
Mortgage Loans by each Servicer and/or the Master Servicer for that
Distribution Date;

      (4) the total amount of any cash deposited in the Distribution Account
in connection with the repurchase of any Mortgage Loans by the Depositor, the
Seller or the related Originator; and

      (5) in the case of the first Distribution Date, the $100 plus interest
deposited in respect of the Class A-R Certificates.

      Available Funds: Not applicable.

      Balloon Loan: Any Mortgage Loan which, by its terms, does not fully
amortize the principal balance thereof by its stated maturity and thus
requires a payment at the stated maturity larger than the monthly payments due
thereunder.

      Bankruptcy: As to any Person, the making of an assignment for the
benefit of creditors, the filing of a voluntary petition in bankruptcy,
adjudication as a bankrupt or insolvent, the entry of an order for relief in a
bankruptcy or insolvency proceeding, the seeking of reorganization,
arrangement, composition, readjustment, liquidation, dissolution or similar
relief, or seeking, consenting to or acquiescing in the appointment of a
trustee, receiver or liquidator, dissolution,



                                      7
<PAGE>

or termination, as the case may be, of such Person pursuant to the provisions
of either the Bankruptcy Code or any other similar state laws.

      Bankruptcy Code: The United States Bankruptcy Code of 1986, as amended.

      Basic Principal Distribution Amount: For any Distribution Date will
equal the excess of the Principal Remittance Amount over the Excess
Subordinated Amount.

      Basis Risk Carry Forward Amount: With respect to the Group 1 Senior
Certificates, the Group 1 Senior Basis Risk Carry Forward Amount, with respect
to the Group 2 Senior Certificates, the Group 2 Senior Basis Risk Carry
Forward Amount, with respect to the Subordinated Certificates, the
Subordinated Basis Risk Carry Forward Amount.

      Basis Risk Carry Forward Reserve Fund: A Reserve Fund established by the
Securities Administrator on behalf of the Trustee for the benefit of the
Holders of the Certificates. The Basis Risk Carry Forward Reserve Fund is an
"outside Reserve Fund" within the meaning of Treasury regulation Section
1.860G-2(h), which is not an asset of any REMIC, ownership of which is
evidenced by the Class OC Certificates, and which is established and
maintained pursuant to Section 5.10.

      Book-Entry Certificates: Beneficial interests in Certificates designated
as "Book-Entry Certificates" in this Agreement, ownership and transfers of
which shall be evidenced or made through book entries by a Clearing Agency as
described in Section 3.09; provided, that after the occurrence of a Book-Entry
Termination whereupon book-entry registration and transfer are no longer
permitted and Definitive Certificates are to be issued to Certificate Owners,
such Book-Entry Certificates shall no longer be "Book-Entry Certificates." The
Classes of Certificates that constitute "Book-Entry Certificates" as of the
Closing Date are set forth in the Preliminary Statement.

      Book-Entry Termination: The date on which the Clearing Agency is no
longer willing or able to properly discharge its responsibilities with respect
to the Book Entry Certificates, and the Depositor is unable to locate a
qualified successor.

      Breached Mortgage Loan: A Mortgage Loan (a)(i) on which the first
payment was not made or (ii) that has been delinquent one or two times in the
six months following the Cut-off Date and (b) as to which the Seller obtained
a representation or warranty that no condition set forth in (a)(i) or, for the
same or other period time specified in such representation or warranty
(a)(ii), exists.

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

      Certificate: Any one of the certificates signed by the Trustee, or the
Securities Administrator on the Trustee's behalf, and authenticated by the
Securities Administrator as Authenticating Agent in substantially the forms
attached hereto as Exhibit A.



                                      8
<PAGE>

      Certificate Balance: With respect to any Certificate other than a Class
OC Certificate at any date, the maximum dollar amount of principal to which
the Holder thereof is then entitled hereunder, such amount being equal to the
principal balance or notional amount, as applicable, as of the Closing Date
(A) plus any Subsequent Recoveries added to the Certificate Balance of such
Certificate pursuant to Section 5.02 hereof, (B) minus the sum of (i) all
distributions of principal previously made with respect thereto, and (ii) with
respect to the Subordinated Certificates only, all Applied Loss Amounts
allocated thereto and all other reductions in Certificate Balance previously
allocated thereto pursuant to Section 5.04 hereof. No individual Class OC
Certificate has a Certificate Balance.

      Certificate Insurance Account: Not applicable.

      Certificate Insurance Payment: Not applicable.

      Certificate Insurer: Not applicable.

      Certificate Insurer Contact Person: Not applicable.

      Certificate Insurer Default: Not applicable.

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

      Certificate Register and Certificate Registrar: The register maintained
and the registrar appointed pursuant to Section 3.02. The initial Certificate
Registrar is the Securities Administrator under this Agreement.

      Certificateholder: The meaning provided in the definition of "Holder."

      Certification Party: As defined in Section 12.05 hereof.

      Certifying Person: As defined in Section 12.05 hereof.

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

      Class 1-A-1 Reserve Fund: A Reserve Fund established by the Securities
Administrator on behalf of the trustee of the Supplemental Interest Trust for
the benefit of the Holders of the Class 1-A-1 Certificates. The Class 1-A-1
Reserve Fund is an "outside Reserve Fund" within the meaning of Treasury
regulation Section 1.860G-2(h), which is an asset of the Supplemental Interest
Trust and is not an asset of any REMIC, ownership of which is evidenced by the
Class 1-A-1 Certificates, and which is established and maintained pursuant to
Section 5.10.

      Class A Interest Distribution Amount: Not applicable.



                                       9
<PAGE>

      Class A Principal Distribution Amount: Not applicable.

      Class A Principal Allocation Percentage: With respect to each of the
Group 1 Senior Certificates and the Group 2 Senior Certificates and any
Distribution Date, the percentage equivalent of a fraction, determined as
follows: (i) in the case of the Group 1 Senior Certificates the numerator of
which is (x) the portion of the Principal Remittance Amount for such
Distribution Date that is attributable to principal received or advanced on
the Group 1 Mortgage Loans, and the denominator of which is (y) the Principal
Remittance Amount for such Distribution Date and (ii) in the case of the Group
2 Senior Certificates the numerator of which is (x) the portion of the
Principal Remittance Amount for such Distribution Date that is attributable to
principal received or advanced on the Group 2 Mortgage Loans, and the
denominator of which is (y) the Principal Remittance Amount for such
Distribution Date.

      Class B Certificates: As set forth in the Preliminary Statement.

      Class B-1 Principal Distribution Amount: With respect to the Class B-1
Certificates and any Distribution Date (i) prior to the Stepdown Date or on or
after the Stepdown Date if a Trigger Event is in effect for that Distribution
Date, the Principal Distribution Amount for that Distribution Date remaining
after distribution of the Senior Principal Distribution Amount, the Class M-1
Principal Distribution Amount, the Class M-2 Principal Distribution Amount,
the Class M-3 Principal Distribution Amount, the Class M-4 Principal
Distribution Amount, the Class M-5 Principal Distribution Amount and the Class
M-6 Principal Distribution Amount or (ii) on or after the Stepdown Date if a
Trigger Event is not in effect for that Distribution Date, the lesser of:

      o      the Principal Distribution Amount for that Distribution Date
            remaining after distribution of the Senior Principal Distribution
            Amount, the Class M-1 Principal Distribution Amount, the Class M-2
            Principal Distribution Amount, the Class M-3 Principal
            Distribution Amount, the Class M-4 Principal Distribution Amount,
            the Class M-5 Principal Distribution Amount and the Class M-6
             Principal Distribution Amount; and

      o      the excess (if any) of (A) the sum of (1) the Class Principal
            Balance of the Class B-1 Certificates immediately prior to that
            Distribution Date and (2) the aggregate Class Principal Balance of
            the Senior Certificates and Class M Certificates (after taking
            into account the payment of the Senior, Class M-1, Class M-2,
            Class M-3, Class M-4, Class M-5 and Class M-6 Principal
            Distribution Amounts for such Distribution Date) over (B) the
            lesser of (i) the aggregate Stated Principal Balance of the
            Mortgage Loans as of the last day of the related Due Period
            multiplied by 96.30% and (ii) the amount, if any, by which (x) the
            aggregate Stated Principal Balance of the Mortgage Loans as of the
            last day of the related Due Period exceeds (y) $1,913,789.

      Class B-2 Principal Distribution Amount: With respect to the Class B-2
Certificates and any Distribution Date (i) prior to the Stepdown Date or on or
after the Stepdown Date if a Trigger Event is in effect for that Distribution
Date, the Principal Distribution Amount for that Distribution Date remaining
after distribution of the Senior Principal Distribution Amount, the Class M-1
Principal Distribution Amount, the Class M-2 Principal Distribution Amount,
the



                                      10
<PAGE>

Class M-3 Principal Distribution Amount, the Class M-4 Principal Distribution
Amount, the Class M-5 Principal Distribution Amount, the Class M-6 Principal
Distribution Amount and the Class B-1 Principal Distribution Amount or (ii) on
or after the Stepdown Date if a Trigger Event is not in effect for that
Distribution Date, the lesser of:

      o      the Principal Distribution Amount for that Distribution Date
            remaining after distribution of the Senior Principal Distribution
            Amount, the Class M-1 Principal Distribution Amount, the Class M-2
            Principal Distribution Amount, the Class M-3 Principal
            Distribution Amount, the Class M-4 Principal Distribution Amount,
            the Class M-5 Principal Distribution Amount, the Class M-6
            Principal Distribution Amount and the Class B-1 Principal
            Distribution Amount; and

      o      the excess (if any) of (A) the sum of (1) the Class Principal
            Balance of the Class B-2 Certificates immediately prior to that
            Distribution Date and (2) the aggregate Class Principal Balance of
            the Senior Certificates, Class M Certificates and Class B-1
            Certificates (after taking into account the payment of the Senior,
            Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6
             and Class B-1 Principal Distribution Amounts for such Distribution
            Date) over (B) the lesser of (i) the aggregate Stated Principal
            Balance of the Mortgage Loans as of the last day of the related
            Due Period multiplied by 97.00% and (ii) the amount, if any, by
            which (x) the aggregate Stated Principal Balance of the Mortgage
            Loans as of the last day of the related Due Period exceeds (y)
            $1,913,789.

      Class B-3 Principal Distribution Amount: With respect to the Class B-3
Certificates and any Distribution Date (i) prior to the Stepdown Date or on or
after the Stepdown Date if a Trigger Event is in effect for that Distribution
Date, the Principal Distribution Amount for that Distribution Date remaining
after distribution of the Senior Principal Distribution Amount, the Class M-1
Principal Distribution Amount, the Class M-2 Principal Distribution Amount,
the Class M-3 Principal Distribution Amount, the Class M-4 Principal
Distribution Amount, the Class M-5 Principal Distribution Amount, the Class
M-6 Principal Distribution Amount, the Class B-1 Principal Distribution Amount
and the Class B-2 Principal Distribution Amount or (ii) on or after the
Stepdown Date if a Trigger Event is not in effect for that Distribution Date,
the lesser of:

      o      the Principal Distribution Amount for that Distribution Date
            remaining after distribution of the Senior Principal Distribution
            Amount, the Class M-1 Principal Distribution Amount, the Class M-2
            Principal Distribution Amount, the Class M-3 Principal
            Distribution Amount, the Class M-4 Principal Distribution Amount,
            the Class M-5 Principal Distribution Amount, the Class M-6
            Principal Distribution Amount, the Class B-1 Principal
            Distribution Amount and the Class B-2 Principal Distribution
            Amount; and

      o      the excess (if any) of (A) the sum of (1) the Class Principal
            Balance of the Class B-3 Certificates immediately prior to that
            Distribution Date and (2) the aggregate Class Principal Balance of
            the Senior Certificates, Class M, Class B-1 and Class B-2
            Certificates (after taking into account the payment of the Senior,
            Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6,
            Class B-1 and Class B-2 Principal



                                      11
<PAGE>

            Distribution Amounts for such Distribution Date) over (B) the
            lesser of (i) the aggregate Stated Principal Balance of the
            Mortgage Loans as of the last day of the related Due Period
            multiplied by 98.00% and (ii) the amount, if any, by which (x) the
            aggregate Stated Principal Balance of the Mortgage Loans as of the
            last day of the related Due Period exceeds (y) $1,913,789.

      Class Interest Shortfall: Not applicable.

      Class M Certificates: As specified in the Preliminary Statement.

      Class M Senior Certificates: As specified in the Preliminary Statement.

      Class M-1 Principal Distribution Amount: With respect to the Class M-1
Certificates and any Distribution Date (i) prior to the Stepdown Date or on or
after the Stepdown Date if a Trigger Event is in effect for that Distribution
Date, the Principal Distribution Amount for that Distribution Date remaining
after distribution of the Senior Principal Distribution Amount or (ii) on or
after the Stepdown Date if a Trigger Event is not in effect for that
Distribution Date, the lesser of:

      o      the Principal Distribution Amount for that Distribution Date
            remaining after distribution of the Senior Principal Distribution
            Amount; and

      o      the excess (if any) of (A) the sum of (1) the Class Principal
            Balance of the Class M-1 Certificates immediately prior to that
            Distribution Date and (2) the aggregate Class Principal Balance of
            the Senior Certificates (after taking into account the payment of
            the Senior Principal Distribution Amount for such Distribution
            Date) over (B) the lesser of (i) the aggregate Stated Principal
            Balance of the Mortgage Loans as of the last day of the related
             Due Period multiplied by 90.70% and (ii) the amount, if any, by
            which (x) the aggregate Stated Principal Balance of the Mortgage
            Loans as of the last day of the related Due Period exceeds (y)
            $1,913,789.

      Class M-2 Principal Distribution Amount: With respect to the Class M-2
Certificates and any Distribution Date (i) prior to the Stepdown Date or on or
after the Stepdown Date if a Trigger Event is in effect for that Distribution
Date, the Principal Distribution Amount for that Distribution Date remaining
after distribution of the Senior Principal Distribution Amount and the Class
M-1 Principal Distribution Amount or (ii) on or after the Stepdown Date if a
Trigger Event is not in effect for that Distribution Date, the lesser of:

      o      the Principal Distribution Amount for that Distribution Date
            remaining after distribution of the Senior Principal Distribution
            Amount and the Class M-1 Principal Distribution Amount; and

      o      the excess (if any) of (A) the sum of (1) the Class Principal
            Balance of the Class M-2 Certificates immediately prior to that
            Distribution Date and (2) the aggregate Class Principal Balance of
            the Senior Certificates and Class M-1 Certificates (after taking
            into account the payment of the Senior and Class M-1 Principal
            Distribution Amounts for such Distribution Date) over (B) the
            lesser of (i) the aggregate Stated Principal



                                       12
<PAGE>

            Balance of the Mortgage Loans as of the last day of the related
            Due Period multiplied by 92.40% and (ii) the amount, if any, by
            which (x) the aggregate Stated Principal Balance of the Mortgage
            Loans as of the last day of the related Due Period exceeds (y)
            $1,913,789.

      Class M-3 Principal Distribution Amount: With respect to the Class M-3
Certificates and any Distribution Date (i) prior to the Stepdown Date or on or
after the Stepdown Date if a Trigger Event is in effect for that Distribution
Date, the Principal Distribution Amount for that Distribution Date remaining
after distribution of the Senior Principal Distribution Amount, the Class M-1
Principal Distribution Amount and the Class M-2 Principal Distribution Amount
or (ii) on or after the Stepdown Date if a Trigger Event is not in effect for
that Distribution Date, the lesser of:

      o      the Principal Distribution Amount for that Distribution Date
            remaining after distribution of the Senior Principal Distribution
            Amount, the Class M-1 Principal Distribution Amount and the Class
            M-2 Principal Distribution Amount; and

      o      the excess (if any) of (A) the sum of (1) the Class Principal
            Balance of the Class M-3 Certificates immediately prior to that
            Distribution Date and (2) the aggregate Class Principal Balance of
            the Senior Certificates, Class M-1 Certificates and Class M-2
            Certificates (after taking into account the payment of the Senior
            and Class M-1 and Class M-2 Principal Distribution Amounts for
            such Distribution Date) over (B) the lesser of (i) the aggregate
            Stated Principal Balance of the Mortgage Loans as of the last day
            of the related Due Period multiplied by 93.50% and (ii) the
            amount, if any, by which (x) the aggregate Stated Principal
            Balance of the Mortgage Loans as of the last day of the related
            Due Period exceeds (y) $1,913,789.

      Class M-4 Principal Distribution Amount: With respect to the Class M-4
Certificates and any Distribution Date (i) prior to the Stepdown Date or on or
after the Stepdown Date if a Trigger Event is in effect for that Distribution
Date, the Principal Distribution Amount for that Distribution Date remaining
after distribution of the Senior Principal Distribution Amount, the Class M-1
Principal Distribution Amount, the Class M-2 Principal Distribution Amount and
the Class M-3 Principal Distribution Amount or (ii) on or after the Stepdown
Date if a Trigger Event is not in effect for that Distribution Date, the
lesser of:

      o      the Principal Distribution Amount for that Distribution Date
            remaining after distribution of the Senior Principal Distribution
            Amount, the Class M-1 Principal Distribution Amount, the Class M-2
            Principal Distribution Amount and the Class M-3 Principal
            Distribution Amount; and

      o      the excess (if any) of (A) the sum of (1) the Class Principal
            Balance of the Class M-4 Certificates immediately prior to that
            Distribution Date and (2) the aggregate Class Principal Balance of
            the Senior Certificates, Class M-1, Class M-2 and Class M-3
            Certificates (after taking into account the payment of the Senior,
            Class M-1, Class M-2 and Class M-3 Principal Distribution Amounts
            for such Distribution Date) over (B) the lesser of (i) the
            aggregate Stated Principal Balance of the Mortgage Loans as of the
            last day of the related Due Period multiplied by 94.20% and (ii)
            the amount, if



                                      13
<PAGE>

            any, by which (x) the aggregate Stated Principal Balance of the
            Mortgage Loans as of the last day of the related Due Period
            exceeds (y) $1,913,789.

      Class M-5 Principal Distribution Amount: With respect to the Class M-5
Certificates and any Distribution Date (i) prior to the Stepdown Date or on or
after the Stepdown Date if a Trigger Event is in effect for that Distribution
Date, the Principal Distribution Amount for that Distribution Date remaining
after distribution of the Senior Principal Distribution Amount, the Class M-1
Principal Distribution Amount, the Class M-2 Principal Distribution Amount,
the Class M-3 Principal Distribution Amount and the Class M-4 Principal
Distribution Amount or (ii) on or after the Stepdown Date if a Trigger Event
is not in effect for that Distribution Date, the lesser of:

      o      the Principal Distribution Amount for that Distribution Date
            remaining after distribution of the Senior Principal Distribution
             Amount, the Class M-1 Principal Distribution Amount, the Class M-2
            Principal Distribution Amount, the Class M-3 Principal
            Distribution Amount and the Class M-4 Principal Distribution
            Amount; and

      o      the excess (if any) of (A) the sum of (1) the Class Principal
            Balance of the Class M-5 Certificates immediately prior to that
            Distribution Date and (2) the aggregate Class Principal Balance of
            the Senior Certificates, Class M-1, Class M-2, Class M-3 and Class
            M-4 Certificates (after taking into account the payment of the
            Senior, Class M-1, Class M-2, Class M-3 and Class M-4 Principal
            Distribution Amounts for such Distribution Date) over (B) the
            lesser of (i) the aggregate Stated Principal Balance of the
            Mortgage Loans as of the last day of the related Due Period
            multiplied by 94.90% and (ii) the amount, if any, by which (x) the
            aggregate Stated Principal Balance of the Mortgage Loans as of the
            last day of the related Due Period exceeds (y) $1,913,789.

      Class M-6 Principal Distribution Amount: With respect to the Class M-6
Certificates and any Distribution Date (i) prior to the Stepdown Date or on or
after the Stepdown Date if a Trigger Event is in effect for that Distribution
Date, the Principal Distribution Amount for that Distribution Date remaining
after distribution of the Senior Principal Distribution Amount, the Class M-1
Principal Distribution Amount, the Class M-2 Principal Distribution Amount,
the Class M-3 Principal Distribution Amount, the Class M-4 Principal
Distribution Amount and the Class M-5 Principal Distribution Amount or (ii) on
or after the Stepdown Date if a Trigger Event is not in effect for that
Distribution Date, the lesser of:

      o      the Principal Distribution Amount for that Distribution Date
            remaining after distribution of the Senior Principal Distribution
            Amount, the Class M-1 Principal Distribution Amount, the Class M-2
            Principal Distribution Amount, the Class M-3 Principal
            Distribution Amount, the Class M-4 Principal Distribution Amount
            and the Class M-5 Principal Distribution Amount; and

       o      the excess (if any) of (A) the sum of (1) the Class Principal
            Balance of the Class M-6 Certificates immediately prior to that
            Distribution Date and (2) the aggregate Class Principal Balance of
            the Senior Certificates, Class M-1, Class M-2, Class M-3, Class
            M-4 and Class M-5 Certificates (after taking into account the
            payment of the Senior, Class M-1, Class M-2, Class M-3, Class M-4
            and Class M-5 Principal Distribution



                                       14
<PAGE>

            Amounts for such Distribution Date) over (B) the lesser of (i) the
            aggregate Stated Principal Balance of the Mortgage Loans as of the
            last day of the related Due Period multiplied by 95.60% and (ii)
            the amount, if any, by which (x) the aggregate Stated Principal
            Balance of the Mortgage Loans as of the last day of the related
            Due Period exceeds (y) $1,913,789.

      Class OC Certificates: As specified in the Preliminary Statement.

      Class OC Distributable Amount: With respect to any Distribution Date and
the Class OC Certificates, the excess, if any, of (x) the sum of (i) the
amount of interest accrued during the related Accrual Period at the related
Pass-Through Rate on the Class Principal Balance for such Distribution Date
and not included in the Extra Principal Distribution Amount on that
Distribution Date and (ii) the Overcollateralization Release Amount, if any,
for such Distribution Date, over (y) the Overcollateralization Increase
Amount, if any, for such Distribution Date.

      Class OC Interest: The Upper-Tier Regular Interest as specified and
described in the Preliminary Statement and the related footnote thereto.

      Class Optimal Interest Distribution Amount: Not applicable.

      Class P Distribution Amount: For each Distribution Date, an amount equal
to the total of all Prepayment Penalties received by the Securities
Administrator from the Servicers on the Mortgage Loans in the prior Due
Period. The Class P Distribution Amount is not part of the Available
Distribution Amount and is therefore not available for distributions to the
other Classes of Certificates.

      Class Principal Balance: With respect to any Class of Certificates other
than the Class OC Certificates and as to any date of determination, the
aggregate of the Certificate Balances of all Certificates of such Class as of
such date. With respect to the Class OC Certificates and any Distribution
Date, the Overcollateralized Amount as of that Distribution Date.

      Class Subordination Percentage: Not applicable.

      Clearing Agency: An organization registered as a "clearing agency"
pursuant to Section 17A of the Securities Exchange Act of 1934, as amended. As
of the Closing Date, the Clearing Agency shall be The Depository Trust
Company.

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

      Closing Date: March 30, 2007.

      Code: The Internal Revenue Code of 1986, as amended, and as it may be
further amended from time to time, any successor statutes thereto, and
applicable U.S. Department of Treasury regulations issued pursuant thereto in
temporary or final form.

      Commission: The U.S. Securities and Exchange Commission.



                                      15
<PAGE>

      Compensating Interest Payment: As to any Distribution Date, an amount
equal to the lesser of (i) the Prepayment Interest Shortfall on the Mortgage
Loans serviced by such Servicer with respect to such Distribution Date and
(ii) the portion of the applicable Servicing Fee that the related Servicer is
required to remit to the Trust as compensation therefor in accordance with the
terms of the related Purchase and Servicing Agreement.

      Component: As specified in the Preliminary Statement.

      Component Balance: With respect to any Component and any Distribution
Date, the Initial Component Balance thereof on the Closing Date, (A) plus any
Subsequent Recoveries added to the Component Balance of such Component
pursuant to Section 5.02, (B) minus the sum of all amounts applied in
reduction of the principal balance of such Component and Realized Losses
allocated thereto on previous Distribution Dates.

      Component Certificates: As specified in the Preliminary Statement.

      Component Notional Amount: Not applicable.

      Confirmation: With respect to the Class 1-A-1 Certificates, the
Confirmation (reference # KQBP7) dated March 30, 2007, evidencing a
transaction between the Corridor Contract Counterparty and the Securities
Administrator.

      Consent: A document executed by the Cooperative Corporation (i)
consenting to the sale of the Cooperative Unit to the Mortgagor and (ii)
certifying that all maintenance charges relating to the Cooperative Unit have
been paid.

      Controlling Person: With respect to any Person, any other Person who
"controls" such Person within the meaning of the Securities Act.

      Cooperative Corporation: The entity that holds title (fee or an
acceptable leasehold estate) to the real property and improvements
constituting the Cooperative Property and which governs the Cooperative
Property, which Cooperative Corporation must qualify as a Cooperative Housing
Corporation under Section 216 of the Code.

      Cooperative Loan: A Mortgage Loan secured by Cooperative Shares and a
Proprietary Lease, if any.

      Cooperative Property: The real property and improvements owned by the
Cooperative Corporation, that includes the allocation of individual dwelling
units to the holders of the shares of the Cooperative Corporation.

      Cooperative Shares: Shares issued by a Cooperative Corporation.

      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 in the State of Illinois at which at any particular time
its corporate trust business with respect to



                                      16
<PAGE>

this Agreement is administered, which office at the date of the execution of
this Agreement is located at 135 South LaSalle Street, Suite 1511, Chicago,
Illinois 60603, Attn: Global Securities and Trust Services MSM 2007-6XS, and
which is the address to which notices to and correspondence with the Trustee
should be directed, or at such other address as the Trustee may designate from
time to time by notice to the Certificateholders, the Depositor, the Master
Servicer and the Securities Administrator or the principal corporate trust
office of any successor Trustee. With respect to the Certificate Registrar and
presentment of Certificates for registration of transfer, exchange or final
payment, Wells Fargo Bank, National Association, Sixth Street and Marquette
Avenue, Minneapolis, Minnesota 55479, Attention: Corporate Trust, Morgan
Stanley Mortgage Loan Trust 2007-6XS, and for all other purposes, P.O. Box 98,
Columbia, Maryland 21046 (or for overnight deliveries, 9062 Old Annapolis
Road, Columbia, Maryland 21045), Attention: Corporate Trust, Morgan Stanley
Mortgage Loan Trust 2007-6XS.

      Corridor Contract: With respect to the Class 1-A-1 Certificates, the
transactions evidenced by the Class 1-A-1 Confirmation, a form of which is
attached hereto as Exhibit D.

      Corridor Contract Counterparty: Morgan Stanley Capital Services Inc.

      Corridor Contract Scheduled Termination Date: The Distribution Date in
March 2015.

      Custodial Account: Each custodial account (other than an Escrow Account)
established and maintained by a Servicer pursuant to a Purchase and Servicing
Agreement.

      Custodial Agreement: Not applicable.

       Custodial Delivery Failure: With respect to any Custodian appointed
hereunder, as defined in Section 6.21 hereof.

      Custodian: A Person who is at anytime appointed by the Depositor as a
custodian of the Mortgage Documents and the Trustee Mortgage Files. The
initial Custodian is LaSalle Bank National Association.

      Custodian Certification: As defined in Section 2.01.

      Cut-off Date: March 1, 2007.

      Cut-off Date Pool Principal Balance: $546,796,792.

      Cut-off Date Principal Balance: As to any Mortgage Loan, the Stated
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.

      Deceased Holder: Not Applicable.



                                      17
<PAGE>

      Defaulted Swap Termination Payment: Not Applicable.

      Defective Mortgage Loan: The meaning specified in Section 2.05(a).

      Deficient Valuation: With respect to any Mortgage Loan, a valuation of
the related Mortgaged Property by a court of competent jurisdiction 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 Certificate: A Certificate of any Class issued in definitive,
fully registered, certificated form. As of the Closing Date the Classes of
Certificates being issued as "Definitive Certificates" are set forth in the
Preliminary Statement.

      Delay Certificates: As specified in the Preliminary Statement.

      Deleted Mortgage Loan: A Mortgage Loan that is repurchased, or replaced
or to be replaced with a Replacement Mortgage Loan.

      Delinquent: Any Mortgage Loan with respect to which the Scheduled
Payment due on a Due Date is not received.

      Depositor: Morgan Stanley Capital I Inc., a Delaware corporation having
its principal place of business in New York, or its successors in interest.

      Depository: Cede & Co., or any other organization registered as a
"clearing agency" pursuant to Section 17A of the Securities Exchange Act of
1934, as amended. The Depository shall initially be 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.

      Determination Date: With respect to each Servicer, the "Determination
Date" set forth in the related Purchase and Servicing Agreement.

      Disqualified Organization: A "disqualified organization" as
defined in Section 860E(e)(5) of the Code.

      Distribution Account: The separate Eligible Account created and
maintained by the Securities Administrator, on behalf of the Trustee, pursuant
to Section 4.01. Funds in the Distribution Account (exclusive of any earnings
on investments made with funds deposited in the Distribution Account) shall be
held in trust for the Trustee and the Certificateholders for the uses and
purposes set forth in this Agreement.

      Distribution Account Deposit Date: With respect to each Servicer, not
later than 1:00 p.m., New York time, on 18th day of each calendar month after
the initial issuance of the Certificates or, if such 18th day is not a
Business Day, either the immediately preceding or



                                       18
<PAGE>

immediately following Business Day, as set forth in the related
Acknowledgement, commencing in April 2007.

      Distribution Date: The 25th day of each month or, if such 25th day is
not a Business Day, the next succeeding Business Day, commencing in April
2007.

      Due Date: With respect to any Distribution Date, the first day of the
month in which such Distribution Date occurs. With respect to any Mortgage
Loan, the date on which a Scheduled Payment is due under the related Mortgage
Note as indicated in the applicable Purchase and Servicing Agreement.

      Due Period: As to any Distribution Date, the second day of the calendar
month preceding the calendar month in which such Distribution Date occurs to
and including the first day of the calendar month in which such Distribution
Date occurs.

      EDGAR: The Commission's Electronic Data Gathering, Analysis and
Retrieval system.

      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 or
the SAIF (to the limits established by the FDIC or the SAIF) and the uninsured
deposits in which accounts are otherwise secured such that, as evidenced by an
Opinion of Counsel delivered to the Trustee, the Securities Administrator 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 trust account or accounts maintained with the trust department of a
federal or state chartered depository institution or trust company, acting in
its fiduciary capacity or (iv) any other account acceptable to each Rating
Agency, as evidenced by a signed writing delivered by each Rating Agency.
Eligible Accounts may bear interest, and may include, if otherwise qualified
under this definition, accounts maintained with the Trustee, the Paying Agent,
the Securities Administrator or the Master Servicer.

      Eligible Institution: An institution having the highest short-term debt
rating, and one of the two highest long-term debt ratings of the Rating
Agencies or the approval of the Rating Agencies.

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

      ERISA-Qualifying Underwriting: A best efforts or firm commitment
underwriting or private placement that meets the requirements of an
Underwriter's Exemption.

      ERISA-Restricted Certificate: As specified in the Preliminary Statement.



                                      19
<PAGE>

      Escrow Account: With respect to each Mortgage Loan, as defined in
Article I of the related Purchase and Servicing Agreement.

      Estoppel Letter: A document executed by the Cooperative Corporation
certifying, with respect to a Cooperative Unit, (i) the appurtenant
Proprietary Lease will be in full force and effect as of the date of issuance
thereof, (ii) the related stock certificate was registered in the Mortgagor's
name and the Cooperative Corporation has not been notified of any lien upon,
pledge of, levy of execution on or disposition of such stock certificate, and
(iii) the Mortgagor is not in default under the appurtenant Proprietary Lease
and all charges due the Cooperative Corporation have been paid.

      Event of Default: Any one of the conditions or circumstances enumerated
in Section 6.14.

      Excess Priority Amount: Not applicable.

      Excess Subordinated Amount: For any Distribution Date, will equal the
excess, if any, of (i) the Overcollateralized Amount on that Distribution Date
over (ii) the Overcollateralization Target Amount for such Distribution Date.

      Exchange Act: The Securities Exchange Act of 1934, as amended, and the
rules and regulations promulgated thereunder.

      Exchange Act Reports: Any reports on Form 10-D, Form 8-K and Form 10-K
required to be filed with respect to the Trust Fund under the Exchange Act.

      Extra Principal Distribution Amount: For any Distribution Date will be
the lesser of the Net Monthly Excess Cashflow for such Distribution Date and
the Overcollateralization Increase Amount as of that Distribution Date.

       Fannie Mae: The entity formerly known as the Federal National Mortgage
Association, 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.

      FHLMC: The Federal Home Loan Mortgage Corporation, 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.

      Final Custodian Certification: As defined in Section 2.02 hereof.

      Fiscal Agent: Not applicable.

      Fitch: Fitch, Inc., or any successor thereto. If Fitch is designated as
a Rating Agency in the Preliminary Statement, for purposes of Section 11.07
the address for notices to Fitch shall be Fitch, Inc., One State Street Plaza,
New York, New York 10004, Attention: Residential



                                      20
<PAGE>

Mortgage Surveillance Group, or such other address as Fitch may hereafter
furnish to the Depositor, the Trustee and the Master Servicer.

      FNBN Mortgage Loan: Each Mortgage Loan originated by First National Bank
of Nevada and listed on the Mortgage Loan Schedule.

      FNBN Purchase Agreement: The Mortgage Loan Purchase Agreement listed in
Exhibit E hereto between the Seller and First National Bank of Nevada.

      Form 8-K Disclosure: As defined in Section 12.03 hereof.

      Global Securities: The global certificates representing the Book-Entry
Certificates.

      GMAC Serviced Mortgage Loan: Each Mortgage Loan serviced by GMAC
Mortgage, LLC, as successor in interest to GMAC Mortgage Corporation, and
listed on the Mortgage Loan Schedule.

      GMAC Servicing Agreement: The Servicing Agreement listed in Exhibit E
hereto between the Seller and GMAC Mortgage, LLC, as successor in interest to
GMAC Mortgage Corporation.

      GreenPoint Mortgage Loan: Each Mortgage Loan originated by GreenPoint
Mortgage Funding, Inc. and listed on the Mortgage Loan Schedule.

      GreenPoint Purchase Agreement: The Mortgage Loan Purchase and Warranties
Agreement listed in Exhibit E hereto between the Seller and GreenPoint
Mortgage Funding, Inc. as seller and servicer.

      GreenPoint Serviced Mortgage Loan: Each Mortgage Loan serviced by
GreenPoint Mortgage Funding, Inc. and listed on the Mortgage Loan Schedule.

      GreenPoint Servicing Agreement: The Servicing Agreement listed in
Exhibit E hereto between the Seller and GreenPoint Mortgage Funding, Inc.

      Group 1 Mortgage Loans: The Mortgage Loans in Loan Group 1.

      Group 1 Priority Amount: With respect to any Distribution Date, the
amount equal to the product of (i) the Group 1 Priority Percentage, (ii) the
Shift Percentage and (iii) the Group 1 Senior Principal Allocation Amount for
that Distribution Date.

      Group 1 Priority Percentage: With respect to any Distribution Date, the
fraction, expressed as a percentage, the numerator of which is the aggregate
Class Principal Balance of the Class 1-A-3-SS and Class 1-A-3-M Certificates,
and the denominator of which is the aggregate Class Principal Balance of the
Group 1 Senior Certificates, in each case prior to giving effect to any
distributions of principal on the Certificates on that Distribution Date.

      Group 1 Senior Basis Risk Carry Forward Amount: With respect to any
Class of Group 1 Senior Certificates and any Distribution Date on which the
Pass-Through Rate for that Class of



                                       21
<PAGE>

Group 1 Senior Certificates is limited to the Group 1 Senior WAC Pass-Through
Rate, an amount equal to the sum of (i) the excess of , if any, (x) the amount
of interest such Class of Group 1 Senior Certificates would have been entitled
to receive on such Distribution Date if (a) the Group 1 Senior WAC
Pass-Through Rate had not been applicable to such Class of Group 1 Senior
Certificates on such Distribution Date, and (b) in the case of the Class 1-A-1
Certificates, the maximum per annum rate of 6.10000% had not been applicable
on such Distribution Date, over (y) the amount of interest accrued on such
Distribution Date at the Group 1 Senior WAC Pass-Through Rate and Group 1
Senior Basis Risk Carry Forward Amount for the previous Distribution Date not
previously distributed together with interest thereon at a rate equal to the
related Pass-Through Rate (without being limited by the Group 1 Senior WAC
Pass-Through Rate) for such Class of Group 1 Senior Certificates for the most
recently ended Interest Accrual Period.

      Group 1 Senior Certificates: As set forth in the Preliminary Statement.

      Group 1 Senior Principal Allocation Amount: With respect to the Group 1
Senior Certificates and any Distribution Date, the product of the Class A
Principal Allocation Percentage for the Group 1 Senior Certificates for that
Distribution Date and the Senior Principal Distribution Amount for that
Distribution Date.

      Group 1 Senior WAC Pass-Through Rate: For the Group 1 Senior
Certificates and any Distribution Date, the lesser of (x) the Pool Net WAC
Pass-Through Rate and (y) a per annum rate equal to the weighted average of
the Net Mortgage Rates of the Group 1 Mortgage Loans as of the first day of
the month preceding the month in which such Distribution Date occurs.

      Group 2 Mortgage Loans: The Mortgage Loans in Loan Group 2.

      Group 2 Percentage: With respect to the Class 2-A-2-SS, Class 2-A-3-SS,
Class 2-A-4-SS, Class 2-A-5-SS and Class 2-A-7-M Certificates and any
Distribution Date the fraction, expressed as a percentage, the numerator of
which is the Class Principal Balance of that Class of Certificates, and the
denominator of which is equal to the aggregate Class Principal Balance of the
Class 2-A-2-SS, Class 2-A-3-SS, Class 2-A-4-SS, Class 2-A-5-SS and Class
2-A-7-M Certificates, in each case immediately prior to that Distribution
Date.

      Group 2 Portion: With respect to the Class 2-A-2-SS, Class
2-A-3-SS, Class 2-A-4-SS, Class 2-A-5-SS and Class 2-A-7-M Certificates and
any Distribution Date the amount equal to the product of (x) the Group 2
Percentage for that Class of Certificates for that Distribution Date and (y)
the portion of the remaining Group 2 Senior Principal Allocation Amount for
that Distribution Date.

      Group 2 Priority Amount: With respect to any Distribution Date, the
amount equal to the product of (i) the Group 2 Priority Percentage, (ii) the
Shift Percentage and (iii) the Group 2 Senior Principal Allocation Amount for
that Distribution Date.

      Group 2 Priority Percentage: With respect to any Distribution Date, the
fraction, expressed as a percentage, the numerator of which is the aggregate
Class Principal Balance of the Class 2-A-6-SS and Class 2-A-6-M Certificates,
and the denominator of which is the aggregate



                                      22
<PAGE>

Class Principal Balance of the Group 2 Certificates, in each case prior to
giving effect to any distributions of principal on the Certificates on that
Distribution Date.

      Group 2 Senior Basis Risk Carry Forward Amount: With respect to any
Class of Group 2 Senior Certificates and any Distribution Date, an amount
equal to the sum of (i) the excess, if any, of (x) the amount of interest such
Class of Group 2 Senior Certificates would have been entitled to receive on
such Distribution Date if none of (a) the Pool Net WAC Cap, (b) the Group 2
WAC Cap over (y) the amount of interest accrued on such Distribution Date at
the least of: (a) the Pool Net WAC Cap and (b) the Group 2 WAC Cap , and (ii)
the related Basis Risk Carry Forward Amount for the previous Distribution Date
not previously distributed together with interest thereon at a rate equal to
the related Pass-Through Rate (without being limited by the Group 2 Senior WAC
Pass-Through Rate) for such Class of Group 2 Senior Certificates for the most
recently ended Interest Accrual Period.

      Group 2 Senior Certificates: As set forth in the Preliminary Statement.

      Group 2 Senior Certificates: As specified in the Preliminary Statement.

      Group 2 Senior Principal Allocation Amount: With respect to the Group 2
Senior Certificates and any Distribution Date, the product of the Class A
Principal Allocation Percentage for the Group 2 Senior Certificates for that
Distribution Date and the Senior Principal Distribution Amount for that
Distribution Date.

      Group 2 Senior WAC Pass-Through Rate: For the Group 2 Senior
Certificates and any Distribution Date, the lesser of (x) the Pool Net WAC
Pass-Through Rate and (y) a per annum rate equal to the weighted average of
the Net Mortgage Rates of the Group 2 Mortgage Loans as of the first day of
the month preceding the month in which such Distribution Date occurs,
adjusted, in the case of the Class 2-A-1-SS and Class 2-A-1-M Certificates, to
accrue on the basis of a 360-day year and the actual number of days in the
related Interest Accrual Period, except that with respect to the April 2007
Distribution Date, the number of days in the related Interest Accrual Period
will be 26.

      Holder: The registered owner of any Certificate as recorded on the books
of the Certificate Registrar except that, solely for the purposes of taking
any action or giving any consent pursuant to this Agreement, any Certificate
registered in the name of the Depositor, the Trustee, the Master Servicer, the
Securities Administrator and any Servicer, or any Affiliate thereof shall be
deemed not to be outstanding in determining whether the requisite percentage
necessary to effect any such consent has been obtained, except that, in
determining whether the Trustee or the Securities Administrator shall be
protected in relying upon any such consent, only Certificates that a
Responsible Officer of the Trustee or the Securities Administrator,
respectively, knows to be so owned shall be disregarded. The Trustee or the
Securities Administrator may request and conclusively rely on certifications
by the Depositor, the Master Servicer, the Securities Administrator or any
Servicer in determining whether any Certificates are registered to an
Affiliate of the Depositor, the Master Servicer, the Securities Administrator
or any Servicer.



                                      23
<PAGE>

      HUD: The United States Department of Housing and Urban Development, or
any successor thereto.

      Indemnifying Party: As specified in Section 12.08 hereof.

      Independent: When used with respect to any Accountants, a Person who is
"independent" within the meaning of Rule 2-01(b) of the Securities and
Exchange Commission's Regulation S-X. When used with respect to any other
Person, a Person who (a) is in fact independent of another specified Person
and any Affiliate of such other Person, (b) does not have any material direct
financial interest in such other Person or any Affiliate of such other Person,
and (c) is not connected with such other Person or any Affiliate of such other
Person as an officer, employee, promoter, underwriter, trustee, partner,
director or Person performing similar functions.

      Index: As to each Mortgage Loan, the index from time to time in effect
for adjustment of the Mortgage Rate as set forth as such on the related
Mortgage Note.

      Initial Component Balance: As specified in the Preliminary Statement.

      Initial Custodian Certification: As defined in Section 2.02.

       Initial Optional Termination Date: The first Distribution Date following
the date on which the aggregate Stated Principal Balance of the Mortgage Loans
is equal to or less than 10% of the aggregate Stated Principal Balance thereof
as of the Cut-off Date.

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

      Insurance Proceeds: Proceeds paid by any Insurance Policy (excluding
proceeds required to be applied to the restoration and repair of the related
Mortgaged Property or released to the Mortgagor), in each case other than any
amount included in such Insurance Proceeds in respect of Insured Expenses and
the proceeds from any Limited Purpose Surety Bond.

      Insured Certificates: Not applicable.

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

      Insured Payment: Not Applicable.

      Interest Accrual Period: With respect to each Class of Delay
Certificates other than the LIBOR Certificates, its corresponding Subsidiary
REMIC Regular Interest or REMIC Regular Interest and any Distribution Date,
the calendar month prior to the month of such Distribution Date. With respect
to the Class 1-A-1 Certificates, its corresponding Subsidiary REMIC Regular
Interest and any Distribution Date, the one month period commencing on the
25th day of the month preceding the month in which such Distribution Date
occurs and ending on the 24th day of the month in which such Distribution Date
occurs. With respect to the Class 2-A-1-SS and



                                      24
<PAGE>

Class 2-A-1-M Certificates and the Subordinated Certificates, their
corresponding Subsidiary REMIC Regular Interest or REMIC Regular Interest and
the Distribution Date in April 2007, the 26-day period commencing on the
Closing Date and ending on the day immediately preceding such Distribution
Date. With respect to the Class 2-A-1-SS and Class 2-A-1-M Certificates and
the Subordinated Certificates, their corresponding Subsidiary REMIC Regular
Interest or REMIC Regular Interest and each Distribution Date following the
Distribution Date in April 2007, the one month period commencing on the
Distribution Date in the calendar month preceding the month in which such
Distribution Date occurs and ending on the day immediately preceding such
Distribution Date. For purposes of computing interest accruals on the Class
2-A-1-SS and Class 2-A-1-M Certificates and the Subordinated Certificates,
each Interest Accrual Period has the actual number of days in such month and
each year is assumed to have 360 days. For purposes of computing interest
accruals on all of the other Classes of Certificates, each Interest Accrual
Period has 30 days in such month and each year is assumed to have 360 days.

      Interest Carry Forward Amount: With respect to any Distribution Date,
the amount, if any, by which the Interest Distribution Amount for that Class
of Certificates for the immediately preceding Distribution Date exceeds the
actual amount distributed on such Class in respect of interest on the
immediately preceding Distribution Date, together with any Interest Carry
Forward Amount with respect to such Class remaining unpaid from the previous
Distribution Date, plus interest accrued thereon at the related Pass-Through
Rate for the most recently ended Interest Accrual Period.

      Interest Determination Date: With respect to the Interest Accrual Period
for any Class of LIBOR Certificates, the second Business Day prior to the
first day of such Interest Accrual Period.

      Interest Distribution Amount: With respect to the Senior Certificates,
the Senior Interest Distribution Amount. With respect to the Subordinated
Certificates, the Subordinated Interest Distribution Amount.

      Interest Remittance Amount: For any Distribution Date, that portion of
the Available Distribution Amount for such Distribution Date that represents
interest received or advanced on the Mortgage Loans.

      Interest Transfer Amount: Not applicable.

      Investor Based Exemption: Any of Prohibited Transaction Class Exemption
("PTCE") 84-14 (for transactions by independent "qualified professional asset
managers"), PTCE 90-1 (for transactions by insurance company pooled separate
accounts), PTCE 91-38 (for transactions by bank collective investment funds),
PTCE 95-60 (for transactions by insurance company general accounts), PTCE
96-23 (for transactions effected by "in house asset managers") the service
provider exemption provided by Section 308(b)(17) of ERISA and Section
4975(d)(20) of the Code, or any comparable exemption available under Similar
Law.

      Last Scheduled Distribution Date: The Distribution Date in February
2047.

      Latest Possible Maturity Date: The Distribution Date in February 2047.



                                      25
<PAGE>

      LIBOR: The London interbank offered rate for one-month United States
dollar deposits calculated in the manner described in Section 5.09.

      LIBOR Business Day: Any day on which banks in London, England and The
City of New York are open and conducting transactions in foreign currency and
exchange.

      LIBOR Certificates: As specified in the Preliminary Statement.

      Limited Purpose Surety Bond: Collectively, Ambac Assurance Corporation
Surety Bond No. AB0039BE and any other Limited Purpose Surety Bond securing an
Additional Collateral Mortgage Loan.

      Liquidated Mortgage 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 related Servicer has certified (in accordance with its Purchase and
Servicing 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.

      Living Holders: Not applicable.

      Loan Group: Any of Loan Group 1 and Loan Group 2, as applicable.

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

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

      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.

      LPMI Mortgage Loan: Certain Mortgage Loans as to which the lender
(rather than the borrower) acquires the Primary Mortgage Insurance Policy and
charges the related borrower an interest premium.

      Master REMIC: As described in the Preliminary Statement.

      Master Servicer: Wells Fargo Bank, National Association, a national
banking association organized under the laws of the United States in its
capacity as Master Servicer and any Person



                                      26
<PAGE>

succeeding as Master Servicer hereunder or any successor in interest, or if
any successor master servicer shall be appointed as herein provided, then such
successor master servicer.

      Master Servicer Compensation: With respect to any Master Servicer that
is a successor to Wells Fargo Bank, National Association as Master Servicer,
the portion of the earnings on the funds on deposit in the Distribution
Account payable on each Distribution Date pursuant to Section 4.02(b)(ii)
hereof agreed to by and between such successor Master Servicer and the
successor securities administrator; provided, that the sum of such Master
Servicer Compensation and the Securities Administrator Compensation payable on
each Distribution Date shall not exceed the total earnings on funds in the
Distribution Account payable pursuant to Section 4.02(b)(ii) hereof earned
since the prior Distribution Date.

      Memorandum: Not applicable.

      MERS: Mortgage Electronic Registration Systems, Inc., a corporation
organized and existing under the laws of the State of Delaware, or any
successor to Mortgage Electronic Registration Systems, Inc.

      MERS Mortgage Loan: Any Mortgage Loan registered with MERS on the
MERS(R) System.

      MERS(R) System: The system of recording transfers of mortgages
electronically maintained by MERS.

      MIN: The mortgage identification number for any MERS Mortgage Loan.

      Minimum Auction Price: With respect to any Distribution Date on which an
Auction is being held, an amount equal to the sum of (a) 100% of the current
aggregate Stated Principal Balance of the Mortgage Loans, plus accrued
interest thereon, (b) the fair market value of any related REO Property in the
Trust Fund and all other property in the Trust Fund being purchased, (c) any
unreimbursed Servicing Advances related to the Mortgage Loans and (d) any
expenses incurred by the Auction Administrator in the Auction process.

      MOM Loan: Any Mortgage Loan as to which MERS is acting as mortgagee,
solely as nominee for the originator of such Mortgage Loan and its successors
and assigns.

      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 11.07 the address for notices to Moody's shall be Moody's
Investors Service, Inc., 99 Church Street, New York, New York 10007,
Attention: Residential Pass-Through Monitoring, or such other address as
Moody's may hereafter furnish to the Depositor or the Master Servicer.

      Mortgage: A mortgage, deed of trust or other instrument encumbering a
fee simple interest in real property securing a Mortgage Note, together with
improvements thereto.

      Mortgage Documents: With respect to each Mortgage Loan, the mortgage
documents required to be delivered to the Custodian.



                                       27
<PAGE>

      MortgageIT Mortgage Loan: Each Mortgage Loan originated by MortgageIT,
Inc. and listed on the Mortgage Loan Schedule.

      MortgageIT Purchase Agreement: The Seller's Purchase, Warranties and
Servicing Agreement listed in Exhibit E hereto between the Seller and
MortgageIT, Inc.

      Mortgage Loan: A Mortgage and the related notes or other evidences of
indebtedness secured by each such Mortgage conveyed, transferred, sold,
assigned to or deposited with the Trustee pursuant to Section 2.01 (including
any REO Property), including without limitation, each Mortgage Loan listed on
the Mortgage Loan Schedule, as amended from time to time.

      Mortgage Loan Auction Price: The price, calculated as set forth in
Section 7.01(b), to be paid in connection with the purchase of the Mortgage
Loans by the Auction Purchaser.

      Mortgage Loan Schedule: The schedule attached hereto as Schedule A,
which shall identify each Mortgage Loan, as such schedule may be amended by
the Depositor or a Servicer from time to time to reflect the addition of
Replacement Mortgage Loans to, or the deletion of Deleted Mortgage Loans from,
the Trust Fund. Such schedule shall, among other things (i) designate the
Servicer servicing such Mortgage Loan and the applicable Servicing Fee Rate;
(ii) identify the designated Loan Group in which such Mortgage Loan is
included, (iii) identify any LPMI Mortgage Loan and designate the rate at
which the premium for such insurance is calculated and (iv) separately
identify the Additional Collateral Mortgage Loans, if any.

      Mortgage Loans: Collectively, the Mortgage Loans in Loan Group 1 and the
Mortgage Loans in Loan Group 2.

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

      Mortgage Rate: As to any Mortgage Loan, the annual rate of interest
borne by the related Mortgage Notes.

      Mortgaged Property: The underlying property, including any Additional
Collateral, securing a Mortgage Loan which, with respect to a Cooperative
Loan, is the related Cooperative Shares and Proprietary Lease.

      Mortgagor: The obligor on a Mortgage Note.

      MSMCI Mortgage Loan: A Mortgage Loan sold by the Seller to the Depositor
pursuant to the MSMCI Purchase Agreement.

      MSMCI Purchase Agreement: The Mortgage Loan Purchase Agreement listed in
Exhibit E hereto between the Seller and the Depositor.

      Net Liquidation Proceeds: With respect to any Liquidated Mortgage Loan
or any other disposition of related Mortgaged Property, the related
Liquidation Proceeds net of Advances, Servicer Advances, Servicing Fees and
any other accrued and unpaid servicing fees received and retained in
connection with the liquidation of such Mortgage Loan or Mortgaged Property.



                                      28
<PAGE>

      Net Monthly Excess Cashflow: For any Distribution Date, the excess, if
any, of (x) the Available Distribution Amount for the Distribution Date over
(y) the sum of the aggregate of the Class A Interest Distribution Amounts
payable to the holders of the Senior Certificates, the Subordinated Interest
Distribution Amounts payable to the holders of the Subordinated Certificates
and the Principal Distribution Amount, in each case, for that Distribution
Date.

      Net Mortgage Rate: With respect to any Mortgage Loan and any
Distribution Date, the related Mortgage Rate as of the Due Date in the month
preceding the month of such Distribution Date reduced by the Aggregate Expense
Rate for such Mortgage Loan.

      Net Prepayment Interest Shortfalls: As to any Distribution Date, the
amount by which the aggregate of Prepayment Interest Shortfalls exceeds the
Compensating Interest Payments for that Distribution Date (and any amounts
paid by the Master Servicer in respect of such shortfalls pursuant to Section
5.06). Each Class' pro rata share of the Net Interest Shortfalls on the
Mortgage Loans shall be based on the amount of interest the Class otherwise
would have been entitled to receive on such Distribution Date.

      Net Swap Payment: Not Applicable.

      Net Swap Receipt: Not Applicable.

      Net WAC Pass-Through Rate: For any Distribution Date and (a) the Group 1
Senior Certificates, the Group 1 Senior WAC Pass-Through Rate, (b) the Group 2
Senior Certificates, the Group 2 Senior WAC Pass-Through Rate and (c) the
Subordinated Certificates, the Pool Net WAC Pass-Through Rate.

      Non-Book-Entry Certificate: Any Certificate other than a Book-Entry
Certificate.

      Non-Delay Certificates: As specified in the Preliminary Statement.

      Non-permitted Foreign Holder: As defined in Section 3.03(f).

      Non-U.S. Person: Any person other than a "United States person" within
the meaning of Section 7701(a)(30) of the Code.

      Nonrecoverable Advance: Any portion of an Advance or Servicer Advance
previously made or proposed to be made by the Master Servicer and/or a
Servicer (as certified in an Officer's Certificate of such Servicer), which in
the good faith judgment of such party, shall not be ultimately recoverable by
such party from the related Mortgagor, related Liquidation Proceeds or
otherwise.

      Notional Amount: Not applicable.

      Notional Amount Certificates: Not applicable.

      Offered Certificates: As specified in the Preliminary Statement.

      Offering Document: The Prospectus or the Memorandum, as applicable.



                                      29
<PAGE>

      Officer's Certificate: A certificate signed by two Authorized Officers
of the Depositor or the Chairman of the Board, any Vice Chairman, the
President, any Vice President or any Assistant Vice President of the Master
Servicer or the Securities Administrator or in the case of any other Person,
signed by an authorized officer of such Person, and in each case delivered to
the Trustee or the Securities Administrator, as applicable signed by an
authorized officer of that Person.

      Officer's Certificate of a Servicer: 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 a Servicer, or (ii) if provided for herein, signed by
a Servicing Officer, as the case may be, and delivered to the Trustee, the
Securities Administrator or the Master Servicer, as required hereby.

      Opinion of Counsel: A written opinion of counsel, reasonably acceptable
in form and substance to the Trustee, the Securities Administrator or the
Master Servicer, as required hereby, and who may be in-house or outside
counsel to the Depositor, the Master Servicer, the Securities Administrator or
the Trustee but which must be Independent outside counsel with respect to any
such opinion of counsel concerning the transfer of any Residual Certificate or
concerning certain matters with respect to ERISA, or the taxation, or the
federal income tax status, of each REMIC.

      Original Applicable Credit Support Percentage: Not applicable.

      Originator: Any one of American Home Mortgage Corporation, First
National Bank of Nevada, GreenPoint Mortgage Funding, Inc., Lydian Private
Bank, MortgageIT, Inc., PHH Mortgage Corporation, Wachovia Mortgage
Corporation and Wilmington Finance, Inc., as applicable.

      Overcollateralization Increase Amount: With respect to any Distribution
Date, the amount, if any, by which the Overcollateralization Target Amount
exceeds the Overcollateralized Amount for such Distribution Date (calculated
for this purpose only after assuming that 100% of the Principal Remittance
Amount on such Distribution Date has been distributed).

      Overcollateralization Release Amount: For any Distribution Date, the
lesser of (1) the Principal Remittance Amount and (2) the excess of (a) the
Overcollateralized Amount over (b) the Overcollateralization Target Amount. In
addition, in connection with the final distribution on the Certificates
pursuant to Section 7.02 hereof, the Overcollateralization Release Amount for
the related Distribution Date shall also include the excess, if any of, (a)
the purchase price paid for the Mortgage Loans and any REO Properties related
to the Mortgage Loans pursuant to Section 7.01 hereof, less any costs incurred
by the Trust Fund in connection with the liquidation thereof pursuant to
Section 7.02 hereof, over (b) the amount distributed on the Certificates
(other than the Class OC Certificates) on that Distribution Date.

      Overcollateralization Target Amount: With respect to any Distribution
Date (i) prior to the Stepdown Date, the product of (x) 1.00% and (y) the
aggregate Stated Principal Balance of the Mortgage Loans as of the Cut-off
Date, (ii) on and after the Stepdown Date, provided that a



                                      30
<PAGE>

Trigger Event is not in effect for that Distribution Date, the lesser of (a)
the product of (x) 2.00% and (y) the aggregate Stated Principal Balance of the
Mortgage Loans as of the related Due Date and (b) the product of (x) 1.00% and
(y) the aggregate Stated Principal Balance of the Mortgage Loans as of the
Cut-off Date and (iii) on and after the Stepdown Date, if a Trigger Event is
in effect, the Overcollateralization Target Amount for the immediately
preceding Distribution Date; provided, however, that on each Distribution Date
the Overcollateralization Target Amount shall not be lower than $1,913,789.

      Overcollateralized Amount: As of the Closing Date, an amount equal to
$5,475,792. With respect to any Distribution Date following the Closing Date,
the amount by which the aggregate Stated Principal Balance of the Mortgage
Loans as of the last day of the related Due Period exceeds the aggregate Class
Principal Balance of the Offered Certificates after taking into account all
payments of principal on such Distribution Date.

      Pass-Through Margin: For each Class of LIBOR Certificates (other than
the Class 1-A-1 Certificates) and the Interest Accrual Period related to each
Distribution Date, as follows:

                                             (1)             (2)           (3)
                                           --------       --------       -------
        Class 2-A-1-SS                      0.11000%       0.22000%       5.4300%
        Class 2-A-1-M                       0.22000%       0.44000%       5.5400%
        Class M-1                           0.70000%       1.05000%       6.0200%
        Class M-2                           0.75000%       1.12500%       6.0700%
        Class M-3                            0.80000%       1.20000%       6.1200%
        Class M-4                           1.10000%       1.65000%       6.4200%
        Class M-5                           1.25000%       1.87500%       6.5700%
        Class M-6                           1.40000%       2.10000%       6.7200%
        Class B-1                           1.50000%       2.25000%         (4)
        Class B-2                           1.75000%       2.62500%         (4)
        Class B-3                           2.40000%       3.60000%          (4)
----------
(1)    For the Interest Accrual Period for each Distribution Date occurring on
      or prior to the Initial Optional Termination Date.

(2)    For each Interest Accrual Period following the Initial Optional
      Termination Date relating to the Certificates.

(3)    The Pass-Through Rate for each Class of Certificates during the Interest
      Accrual Period related to the first Distribution Date.

(4)    The Pass-Through Rates for the Class B-1, Class B-2 and Class B-3
      Certificates for the Interest Accrual Period related to the first
      Distribution Date are limited by the Pool Net WAC Pass-Through Rate of
      6.81278% per annum.

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



                                      31
<PAGE>

      Paying Agent: Any paying agent appointed pursuant to Section 3.08. The
initial Paying Agent shall be the Securities Administrator under this
Agreement.

      PCOAB: The Public Company Accounting Oversight Board.

      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 initial principal balance or notional
amount, as applicable, of such Certificate by the aggregate of the Class
Principal Balance or Notional Amount, as applicable, of all Certificates of
the same Class.

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

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

            (ii) 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
      shall not result in the downgrading or withdrawal of the ratings then
      assigned to the Certificates by the Rating Agencies, as evidenced by a
      signed writing delivered by each Rating Agency;

            (iii) commercial or finance company paper which is then receiving
      the highest commercial or finance company paper rating of each Rating
      Agency rating such paper, or such lower rating as shall not result in
      the downgrading or withdrawal of the ratings then assigned to the
      Certificates by the Rating Agencies, as evidenced by a signed writing
      delivered by each Rating Agency;

            (iv) 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 (or in the case of the principal depository institution in a
      holding company system, the commercial paper or long-term unsecured debt
      obligations of such holding company, but only if Moody's is not the
      applicable Rating Agency) are then rated 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 shall not result in the
      downgrading or withdrawal of the ratings then assigned to the
      Certificates by the Rating Agencies, as evidenced by a signed writing
      delivered by each Rating Agency;

            (v) 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;

            (vi) guaranteed reinvestment agreements issued by any bank,
      insurance company or other corporation acceptable to the Rating Agencies
      at the time of the



                                      32
<PAGE>

      issuance of such agreements, as evidenced by a signed writing delivered
      by each Rating Agency;

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

            (viii) 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 one of the two
      highest ratings of each Rating Agency (except if the Rating Agency is
      Moody's, such rating shall be the highest commercial paper rating of
      Moody's for any such series), or such lower rating as shall not result
      in the downgrading or withdrawal of the ratings then assigned to the
      Certificates by the Rating Agencies, as evidenced by a signed writing
      delivered by each Rating Agency;

            (ix) interests in any money market fund which at the date of
      acquisition of the interests in such fund and throughout the time such
      interests are held in such fund has the highest applicable rating by
      each Rating Agency rating such fund or such lower rating as shall not
      result in a change in the rating then assigned to the Certificates by
      each Rating Agency, as evidenced by a signed writing delivered by each
      Rating Agency, including funds for which the Trustee, the Master
      Servicer, the Securities Administrator or any of its Affiliates is
      investment manager or adviser;

            (x) short-term investment funds sponsored by any trust company or
      national banking association incorporated under the laws of the United
      States or any state thereof which on the date of acquisition has been
      rated by each applicable Rating Agency in their respective highest
      applicable rating category or such lower rating as shall not result in a
      change in the rating then specified stated maturity and bearing interest
      or sold at a discount acceptable to each Rating Agency as shall not
      result in the downgrading or withdrawal of the ratings then assigned to
      the Certificates by the Rating Agencies, as evidenced by a signed
      writing delivered by each Rating Agency; and

            (xi) such other investments having a specified stated maturity and
      bearing interest or sold at a discount acceptable to the Rating Agencies
      as shall not result in the downgrading or withdrawal of the ratings then
      assigned to the Certificates by the Rating Agencies, as evidenced by a
      signed writing delivered by each Rating Agency;

provided, that no such instrument shall be a Permitted Investment if (i) such
instrument evidences the right to receive interest only payments with respect
to the obligations underlying such instrument or (ii) such instrument would
require the Depositor to register as an investment company under the
Investment Company Act of 1940, as amended.

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



                                      33
<PAGE>

      PHH Purchase and Servicing Agreement: Collectively, the PHH Purchase
Agreement and the PHH Servicing Agreement.

      PHH Purchase Agreement: The Mortgage Loan Purchase and Warranties
Agreement listed in Exhibit E hereto among the Seller, PHH Mortgage
Corporation (formerly known as Cendant Mortgage Corporation), as a seller and
servicer, and Bishop 's Gate Residential Mortgage Trust, as a seller.

       PHH Servicing Agreement: Second Amended and Restated Mortgage Loan Flow
Purchase, Sale & Servicing Agreement listed on Exhibit E hereto between the
Seller and PHH Mortgage Corporation (formerly known as Cendant Mortgage
Corporation) and Bishop's Gate Residential Mortgage Trust.

      PHH Serviced Mortgage Loan: Each Mortgage Loan originated and serviced
by PHH Mortgage Corporation (formerly known as Cendant Mortgage Corporation)
and listed on the Mortgage Loan Schedule.

      Plan: Any employee benefit plan or other plan or arrangement subject to
Section 406 of ERISA or Section 4975 of the Code, including individual
retirement accounts and annuities, Keogh plans and collective investment funds
and separate accounts in which such plans, accounts or arrangements are
invested.

      Plan Asset Regulations: The Department of Labor regulations set forth in
29 C.F.R. ss.2510.3-101.

      Planned Balance: With respect to any group of Planned Principal Classes
or Components in the aggregate and any Distribution Date appearing in Schedule
B hereto, the Aggregate Planned Balance for such group and Distribution Date.
With respect to any other Planned Principal Class or Component and any
Distribution Date appearing in Schedule B hereto, the applicable amount
appearing opposite such Distribution Date for such Class or Component.

      Planned Principal Classes: As specified in the Preliminary Statement.

      Pool Net WAC Pass-Through Rate: For any Distribution Date, a per annum
rate equal to the weighted average of the Net Mortgage Rates of the Mortgage
Loans as of the first day of the month preceding the month in which such
Distribution Date occurs, adjusted, in the case of the LIBOR Certificates
(except for the Class 1-A-1 Certificates), to accrue on the basis of a 360-day
year and the actual number of days in the related Interest Accrual Period, and
in the case of the Class 1-A-1 Certificates, to accrue on the one month period
commencing on the 25th day of the month preceding the month in which such
Distribution Date occurs and ending on the 24th day of the month in which such
Distribution Date occurs, except that with respect to the April 2007
Distribution Date, the number of days in the related Interest Accrual Period
will be 26; provided, that in the case of the LIBOR Certificates (except for
the Class 1-A-1, Class 2-A-1-SS and Class 2-A-1-M Certificates), such rate
shall not exceed 11.00000%, and in the case of the Class 1-A-1 Certificates,
such rate shall not exceed 6.10000%.

      Prepayment Interest Shortfall: With respect to each Mortgage Loan, the
amount of the shortfall in interest payable on such Mortgage Loan that occurs
as a result of the prepayment by



                                      34
<PAGE>

the related Mortgagor of such Mortgage Loan calculated in accordance with
formula set forth in the related Purchase and Servicing Agreement.

      Prepayment Penalty: As to a Mortgage Loan, any penalty payable by a
Mortgagor in connection with certain partial prepayments and all prepayments
in full made within the related Prepayment Penalty Period, the Prepayment
Penalties with respect to each applicable Mortgage Loan so held by the Trust
Fund being identified in the Prepayment Penalty Schedule.

      Prepayment Penalty Period: As to any Mortgage Loan, the period of time
during which a Prepayment Penalty may be imposed.

      Prepayment Penalty Schedule: As of any date, the list of Prepayment
Penalties included in the Trust Fund on that date (including the Prepayment
Penalty summary attached thereto). The Prepayment Penalty Schedule shall set
forth, by Loan Group, the following information with respect to each
Prepayment Penalty:

o      the Mortgage Loan account number;

o      a code indicating the type of Prepayment Penalty;

o      the state of origination in which the related Mortgage Property is
      located;

o      the first date on which a monthly payment is or was due under the
      related Mortgage Note;

o      the term of the Prepayment Penalty;

o      the original principal amount of the related Mortgage Loan; and

o      the Cut-off Date Principal Balance of the related Mortgage Loan.

      The Prepayment Penalty Schedule shall be amended from time to time by
the Seller in accordance with this Agreement.

      Prepayment Period: With respect to any Mortgage Loan and any
Distribution Date, the calendar month preceding that Distribution Date.

      Prepayment Shift Percentage: Not applicable.

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

      Principal Distribution Amount: For any Distribution Date will be the sum
of the Basic Principal Distribution Amount and the Extra Principal
Distribution Amount, in each case for that Distribution Date, and, with
respect to the first Distribution Date, the $100 deposited in respect of the
Class A-R Certificates pursuant to Section 2.01 hereof.

      Principal Prepayment: Any payment of principal by a Mortgagor on a
Mortgage Loan that is received in advance of its scheduled Due Date and is not
accompanied by an amount



                                      35
<PAGE>

representing scheduled interest due on any date or dates in any month or
months subsequent to the month of prepayment.

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

      Principal Reductions: Not applicable.

      Principal Remittance Amount: For any Distribution Date, the sum of

             (i) the principal portion of all Scheduled Payments on the
      Mortgage Loans due during the related Due Period, whether or not
      received on or prior to the related Determination Date;

            (ii) the principal portion of all proceeds received in respect of
      the repurchase of a Mortgage Loan (or, in the case of a substitution,
      certain amounts representing a principal adjustment as required by this
      Agreement) during the related Prepayment Period; and

            (iii) the principal portion of all other unscheduled collections,
      including Insurance Proceeds, condemnation proceeds, Liquidation
      Proceeds and all partial Principal Prepayments and Principal Prepayments
      in full, received during the related Prepayment Period, to the extent
      applied as recoveries of principal on the Mortgage Loans,

provided, that in no event will the Principal Remittance Amount with respect
to any Distribution Date be (x) less than zero or (y) greater than the then
outstanding aggregate Class Principal Balance of the Certificates.

      Private Certificate: As specified in the Preliminary Statement.

      Pro Rata Portion: With respect to any Class of Senior Certificates in a
Senior Certificate Group and any Distribution Date, the product of (x) a
fraction, the numerator of which is the Class Principal Balance of that class
of Senior Certificates immediately prior to that Distribution Date, and the
denominator of which is equal to the aggregate Class Principal Balance of the
Senior Certificates in that Senior Certificate Group immediately prior to that
Distribution Date, and (y) the portion of the Senior Principal Allocation
Amount payable to all of the classes of Senior Certificates in that Senior
Certificate Group on that Distribution Date.

      Pro Rata Share: Not applicable.

      Pro Rata Subordinated Percentage: Not applicable.

      Proceeding: Any suit in equity, action at law or other judicial or
administrative proceeding.

      Proprietary Lease: With respect to any Cooperative Property, a lease or
occupancy agreement between a Cooperative Corporation and a holder of related
Cooperative Shares.



                                      36
<PAGE>

      Prospectus: The prospectus supplement dated March 27, 2007, together
with the accompanying prospectus dated December 1, 2006, relating to the
Offered Certificates.

      Purchase and Servicing Agreements: Collectively, the mortgage loan
purchase and servicing agreements, each as amended by the related
Acknowledgement, listed in Exhibit E hereto, as each such agreement may be
amended or supplemented from time to time as permitted hereunder.

      Purchase Date: As defined in Section 7.01(c).

      Purchase Price: With respect to any Mortgage Loan required or permitted
to be purchased by the Seller or Depositor pursuant to this Agreement, or by
the related Originator or Servicer pursuant to the related Purchase and
Servicing Agreement, an amount equal to the sum of (i) 100% of the unpaid
principal balance of the Mortgage Loan on the date of such purchase and (ii)
accrued interest thereon at the applicable Net Mortgage Rate from the date
through which interest was last paid by the Mortgagor to the Due Date in the
month in which the Purchase Price is to be distributed to Certificateholders,
or such other amount as may be specified in the related Purchase and Servicing
Agreement and (iii) costs and damages incurred by the Trust Fund in connection
with a repurchase pursuant to Section 2.05 hereof that arises out of a
violation of any predatory or abusive lending law with respect to the related
Mortgage Loan.

      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. 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 Mortgage Loan, an amount
(not less than zero or more than the Stated Principal Balance of the related
Mortgage Loan) as of the date of such liquidation, equal to (i) the Stated
Principal Balance of the Liquidated Mortgage 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 Stated Principal Balance of
such Liquidated Mortgage 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 Mortgage Loan. With respect to each
Mortgage Loan which 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. With respect to each
Mortgage Loan which has become the subject of a Debt Service Reduction and any
Distribution Date, the amount, if any, by which the principal portion of the
related Scheduled Payment has been reduced.



                                      37
<PAGE>

      To the extent the Master Servicer or a Servicer receives Subsequent
Recoveries with respect to any Mortgage Loan, the amount of the Realized Loss
with respect to that Mortgage Loan will be reduced by such Subsequent
Recoveries.

      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: As to any Distribution Date (i) with respect to the
Non-Delay Certificates, the last Business Day preceding such Distribution Date
(or the Closing Date, in the case of the first Distribution Date) unless such
Certificates shall no longer be Book-Entry Certificates, in which case the
Record Date shall be the last Business Day of the month preceding the month of
such Distribution Date and (ii) in the case of the Delay Certificates
(including the Non-Delay Certificates that are subsequently reissued as
Definitive Certificates), the last Business Day of the month preceding the
month of each Distribution Date.

      Redemption Price: With respect to any Class of Certificates to be
redeemed, an amount equal to 100% of the related Class Principal Balance of
the Certificates to be so redeemed, together with interest on such amount at
the applicable Pass-Through Rate through the related Accrual Period (as
increased by any Class Unpaid Interest Amounts), and including, in the case of
the Redemption Price payable in connection with the redemption and retirement
of all of the Certificates, all amounts (including, without limitation, all
previously unreimbursed Advances and Servicer Advances and accrued and unpaid
Servicing Fees) payable or reimbursable to the Trustee, the Securities
Administrator, the Master Servicer, the Servicers or the Custodian pursuant to
this Agreement, the Purchase and Servicing Agreements, or the Custodial
Agreements (to the extent such amounts are not paid to the Custodian by the
Seller).

      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.

      Regulation AB: Subpart 229.1100 - Asset Backed Securities (Regulation
AB), 17 C.F.R. ss.ss.229.1100-229.1123, as such may be amended from time to
time, and subject to such clarification and interpretation as have been
provided by the Commission in the adopting release (Asset-Backed Securities,
Securities Act Release No. 33-8518, 70 Fed. Reg. 1,506, 1,531 (Jan. 7, 2005))
or by the staff of the Commission, or as may be provided by the Commission or
its staff from time to time.

      Reimbursement Amount: Not applicable.

      Relevant Servicing Criteria: The Servicing Criteria applicable to the
various parties, as set forth on Exhibit O attached hereto. For clarification
purposes, multiple parties can have responsibility for the same Relevant
Servicing Criteria. With respect to a Servicing Function Participant engaged
by the Master Servicer, the Securities Administrator, any Servicer or any
Custodian, the term "Relevant Servicing Criteria" may refer to a portion of
the Relevant Servicing Criteria applicable to such parties.



                                      38
<PAGE>

      Relief Act: The Servicemembers' Civil Relief Act (formerly known as the
Soldiers' and Sailors' Civil Relief Act of 1940), as amended, and any similar
state laws.

      Relief Act Interest Shortfalls: 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.

      Relief Act Reduction: A reduction in the amount of the monthly interest
payment on a Mortgage Loan pursuant to the Servicemembers' Civil Relief Act.

      REMIC: Each pool of assets in the Trust Fund designated as a REMIC as
described in the Preliminary Statement.

      REMIC 1: As specified in the Preliminary Statement.

      REMIC 1 Interest: As specified in the Preliminary Statement.

      REMIC 1 Regular Interest: As specified in the Preliminary Statement.

      REMIC Provisions: The provisions of the federal income tax law relating
to real estate mortgage investment conduits, which appear at Sections 860A
through 860G of the Code, and related provisions, and regulations, including
proposed regulations and rulings, and administrative pronouncements
promulgated thereunder, as the foregoing may be in effect from time to time.

      REO Property: A Mortgaged Property acquired by the Trust Fund through
foreclosure or deed-in-lieu of foreclosure in connection with a defaulted
Mortgage Loan or otherwise treated as having been acquired pursuant to the
REMIC Provisions.

      Replacement Mortgage Loan: A mortgage loan substituted by an Originator
or the Seller for a Deleted Mortgage Loan which must, on the date of such
substitution, as confirmed in a Request for Release, (i) have a Stated
Principal Balance, after deduction of all Scheduled Payments due in the month
of substitution, not in excess of the Stated Principal Balance of the Deleted
Mortgage Loan, (ii) if such Mortgage Loan is a fixed-rate Mortgage Loan, have
a Mortgage Rate not less than (and not more than two percentage points greater
than) the mortgage rate of the Deleted Mortgage Loan, (iii) if such Mortgage
Loan is an adjustable-rate Mortgage Loan, have a Mortgage Rate not less than
(and not more than two percentage points greater than) the mortgage rate of
the Deleted Mortgage Loan, (iv) have a Loan-to-Value Ratio equal to or less
than that of the Deleted Mortgage Loan, (v) have a remaining term to maturity
not greater than (and not more than one year less than) that of the Deleted
Mortgage Loan, (vi) is otherwise acceptable to the Seller, (vii) if such
Mortgage Loan is an adjustable-rate Mortgage Loan, have the same adjustment
date as that of the Deleted Mortgage Loan, (viii) if such Mortgage Loan is an
adjustable-rate Mortgage Loan, have a minimum Mortgage Rate not less than that
of the Deleted Mortgage Loan, (ix) if such Mortgage Loan is an adjustable-rate
Mortgage Loan, have the same Index as that of the Deleted Mortgage Loan, (x)
comply with all of the representations



                                      39
<PAGE>

and warranties set forth in the related underlying servicing agreement, as
modified by any related assignment thereof, and (xi) shall be accompanied by
an Opinion of Counsel that such Replacement Mortgage Loan would not adversely
affect the REMIC status of any REMIC created hereunder or would not otherwise
be prohibited by this Pooling and Servicing Agreement.

      Replacement Swap Counterparty Payment: Not Applicable.

      Reportable Event: As defined in Section 12.03 hereof.

      Reporting Party: The Depositor, any Originator, the Master Servicer, any
Custodian, any Servicer, any originator identified in the Prospectus
Supplement, the Corridor Contract Counterparty, any credit enhancement
provider described herein and any other material transaction party as may be
mutually agreed between the Depositor and the Master Servicer from time to
time for the purpose of complying with the requirements of the Commission.

      Reporting Subcontractor: With respect to the Master Servicer, the
Securities Administrator or any Custodian, any Subcontractor determined by
such Person pursuant to Section 12.08(b) to be "participating in the servicing
function" within the meaning of Item 1122 of Regulation AB. References to a
Reporting Subcontractor shall refer only to the Subcontractor of such Person
and shall not refer to Subcontractors generally.

      Repurchase Price: With respect to any Mortgage Loan purchased from the
Trust pursuant to Section 2.07 hereof, 100% of the unpaid principal balance of
such Mortgage Loan, plus all related accrued and unpaid interest, and the
amount of any unreimbursed Servicing Advances made by the Servicers or the
Master Servicer related to the Mortgage Loan.

      Request for Release: The Request for Release submitted by the applicable
Servicer to the Trustee or the applicable Custodian, as applicable,
substantially in the form of Exhibit M or the equivalent form under the
applicable Custodial Agreement.

      Required Coupon: Not applicable.

      Required Distributions: Not applicable.

      Reserve Fund: The Basis Risk Carry Forward Reserve Fund or the Class
1-A-1 Reserve Fund, as the context requires.

      Reserve Fund Deposit: With respect to each Reserve Fund, $1,000.

      Residual Certificate: The Class A-R Certificates.

      Responsible Officer: With respect to the Trustee, any officer in the
corporate trust department or similar group of the Trustee with direct
responsibility for the administration of this Agreement and also, with respect
to a particular corporate trust matter, any other officer to whom such matter
is referred because of his or her knowledge of and familiarity with the
particular subject. With respect to the Master Servicer, any officer in its
master servicing operations with direct responsibility for the Administration
of this Agreement. With respect to the Securities



                                      40
<PAGE>

Administrator, any officer in the corporate trust department or similar group
of the Securities Administrator with direct responsibility for the
administration of this Agreement and also, with respect to a particular
corporate trust matter, any other officer to whom such matter is referred
because of his or her knowledge of and familiarity with the particular
subject.

      Restricted Classes: As defined in Section 5.02(e).

      Restricted Global Security: As defined in Section 3.01(c).

      Rule 144A: Rule 144A under the Securities Act.

      S&P: Standard & Poor's, a division of The McGraw-Hill Companies, Inc. If
S&P is designated as a Rating Agency in the Preliminary Statement, for
purposes of Section 11.07 the address for notices to S&P shall be Standard &
Poor's, 55 Water Street, New York, New York 10041, Attention: Mortgage
Surveillance Monitoring, or such other address as S&P may hereafter furnish to
the Depositor and the Master Servicer.

      SAIF: The Saving's Association Insurance Fund, or any successor thereto.

      Sarbanes-Oxley Act: The Sarbanes-Oxley Act of 2002 and the rules and
regulations of the Commission promulgated thereunder (including any
interpretations thereof by the Commission's staff).

      Sarbanes-Oxley Certification: A written certification covering the
activities of all Servicing Function Participants and signed by a senior
officer of the Master Servicer in charge of the master servicing function that
complies with (i) the Sarbanes-Oxley Act of 2002, as amended from time to
time, and (ii) Exchange Act Rules 13a-14(d) and 15d-14(d), as in effect from
time to time.

      Scheduled Balances: Not applicable.

      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 in the related Purchase and Servicing
Agreement, 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 Classes: As specified in the Preliminary Statement.

      Scheduled Principal Distribution Amount: Not applicable.

      Securities Act: The Securities Act of 1933, as amended, and the rules
and regulations thereunder.

      Securities Administrator: Wells Fargo Bank, National Association, not in
its individual capacity but solely as Securities Administrator, or any
successor in interest, or if any successor Securities Administrator shall be
appointed as herein provided, then such successor Securities Administrator.



                                      41
<PAGE>

      Securities Administrator Compensation: With respect to any Securities
Administrator that is a successor to Wells Fargo Bank, National Association as
Securities Administrator, the portion of the earnings on the funds on deposit
in the Distribution Account payable on each Distribution Date pursuant to
Section 4.02(b)(ii) hereof agreed to by and between such Securities
Administrator and the successor master servicer; provided, that (x) such
Securities Administrator Compensation payable on each Distribution Date shall
equal at least one day's earnings accrued since the prior Distribution Date
and (y) the sum of such Securities Administrator Compensation and the Master
Servicer Compensation payable on each Distribution Date shall not exceed the
total earnings on the funds on deposit in the Distribution Account payable on
each Distribution Date pursuant to Section 4.02(b)(ii) hereof earned since the
prior Distribution Date.

       Seller: Morgan Stanley Mortgage Capital Inc., a New York corporation.

      Senior Certificate Group: As specified in the Preliminary Statement.

      Senior Certificates: As specified in the Preliminary Statement.

      Senior Defaulted Swap Termination Payment: Not Applicable.

      Senior Enhancement Percentage: For any Distribution Date, the percentage
obtained by dividing (x) the sum of (i) the aggregate Class Principal Balance
of the Subordinated Certificates and (ii) the Overcollateralized Amount by (y)
the aggregate Stated Principal Balance of the Mortgage Loans as of the end of
the related Due Period, calculated after taking into account distributions of
principal on the Mortgage Loans and distribution of the Principal Distribution
Amount to the holders of the Certificates then entitled to distributions of
principal on such Distribution Date.

      Senior Interest Distribution Amount: For each Class of Senior
Certificates and any Distribution Date, the interest accrued during the
related Interest Accrual Period on the related Class Principal Balance of that
Class immediately prior to the Distribution Date at the Pass-Through Rate for
that Class reduced (to an amount not less than zero), in the case of such
Class, by the allocable share, if any, for that Class of Prepayment Interest
Shortfalls to the extent not covered by Compensating Interest paid by the
Master Servicer or the Servicers and Relief Act Interest Shortfalls, together
with the Interest Carry Forward Amount, if any, for such Distribution Date for
such Class of Senior Certificates and in the case of the first Distribution
Date, the amount deposited in respect of interest on the Class A-R
Certificates.

      Senior Principal Distribution Amount: With respect to any Distribution
Date (i) prior to the Stepdown Date or on or after the Stepdown Date if a
Trigger Event is in effect for that Distribution Date, the Principal
Distribution Amount or (ii) on or after the Stepdown Date if a Trigger Event
is not in effect for that Distribution Date, the lesser of:

      the Principal Distribution Amount for that Distribution Date; and

      the excess (if any) of (A) the aggregate Class Principal Balance of the
          Senior Certificates immediately prior to that Distribution Date over
           (B) the lesser of (i) the aggregate Stated Principal Balance of the
          Mortgage Loans as of the last day of the related Due Period
          multiplied by 87.50% and (ii) the amount, if any, by which (x) the
          aggregate



                                       42
<PAGE>

          Stated Principal Balance of the Mortgage Loans as of the last day of
          the related Due Period exceeds (y) $1,913,789.

      Senior Turbo Allocation Amount: Not applicable.

      Sequential Trigger Event: With respect to any Distribution Date, a
Sequential Trigger Event is in effect if (a) with respect to any Distribution
Date occurring before April 2009, the circumstances in which the aggregate
amount of Realized Losses incurred since the Cut-off Date through the last day
of the related Prepayment Period divided by the aggregate Stated Principal
Balance of the Mortgage Loans as of the Cut-off Date exceeds 0.20% and (b)
with respect to any Distribution Date occurring in or after April 2009, a
Trigger Event is in effect.

      Servicer: Each Servicer under a Purchase and Servicing Agreement, and
its respective successors and assigns. As of the Closing Date, the Servicers
of the Mortgage Loans shall be GMAC Mortgage, LLC, as successor in interest to
GMAC Mortgage Corporation, GreenPoint Mortgage Funding, Inc., PHH Mortgage
Corporation, Wachovia Mortgage Corporation and Wells Fargo Bank, National
Association.

      Servicer Advance: A "Servicer Advance" or "Servicing Advance" as defined
in the applicable Purchase and Servicing Agreement.

      Servicing Criteria: The "servicing criteria" set forth in Item 1122(d)
of Regulation AB, as the same may be amended from time to time.

      Servicing Fee: As to any Distribution Date and each Mortgage Loan, an
amount equal to the product of (a) one-twelfth of the related Servicing Fee
Rate and (b) the Stated Principal Balance of such Mortgage Loan as of the
first day of the related Due Period.

      Servicing Fee Rate: With respect to each Mortgage Loan and any
Distribution Date, the per annum rate specified in the related Purchase and
Servicing Agreement.

      Servicing Function Participant: Any Sub-Servicer, Subcontractor or any
other Person, other than each Servicer, the Master Servicer, the Trustee, the
Securities Administrator and any Custodian, that is performing activities
addressed by the Servicing Criteria.

      Servicing Officer: Any officer of the related Servicer involved in, or
responsible for, the administration and servicing of the related Mortgage
Loans whose name and facsimile signature appear on a list of servicing
officers furnished to the Master Servicer by the related Servicer on the
Closing Date pursuant to the related Purchase and Servicing Agreement, as such
list may from time to time be amended.

      Shift Percentage: With respect to each Distribution Date, the percentage
set forth below for that Distribution Date:



                                      43
<PAGE>

               Distribution Date                             Percentage
                -----------------                             ----------

               April 2007 --March 2010.....................       0%
               April 2010 --March 2012.....................       45%
               April 2012 --March 2013.....................       80%
               April 2013 --March 2014.....................       100%
               April 2014 and thereafter..................        300%

      Similar Law: As defined in Section 3.03(d) hereof.

      Startup Day: The day designated as such pursuant to Section 10.01(b)
hereof.

      Stated Principal Balance: As to any Mortgage Loan and Due Date, the
unpaid principal balance of such Mortgage Loan as of such Due Date 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 (other
than with respect to any Liquidated Mortgage Loan) and to the payment of
principal due on such Due Date and irrespective of any delinquency in payment
by the related Mortgagor.

      Stepdown Date: The later to occur of:

      (1)    the earlier to occur of

            (x) the Distribution Date in April 2010, and

            (y) the Distribution Date on which the aggregate Class Principal
      Balance of the Senior Certificates is reduced to zero; and

      (2) the first Distribution Date on which the Senior Enhancement
Percentage (calculated for this purpose only after taking into account
distributions of principal on the Mortgage Loans, but prior to any
distribution of the Principal Distribution Amount to the holders of the
Certificates on the Distribution Date) is greater than or equal to 12.50%.

      Subcontractor: Any vendor, subcontractor or other Person that is not
responsible for the overall servicing (as "servicing" is commonly understood
by participants in the mortgage-backed securities market) of Mortgage Loans
but performs one or more discrete functions identified in Item 1122(d) of
Regulation AB with respect to Mortgage Loans under the direction or authority
of any Servicer (including a Sub-Servicer of any Servicer), the Securities
Administrator, the Master Servicer, the Trustee or any Custodian, as the case
may be.

      Subordinated Basis Risk Carry Forward Amount: With respect to any Class
of Subordinated Certificates and any Distribution Date, an amount equal to the
sum of (i) the excess, if any, of (x) the amount of interest such Class of
Subordinated Certificates would have been entitled to receive on such
Distribution Date if neither (a) the Pool Net WAC Cap nor (b) the maximum per
annum rate of 11.000% had been applicable to such Class on such Distribution
Date over (y) the amount of interest accrued on such Distribution Date at the
lesser of (a) the Pool Net WAC Cap and (b) the maximum per annum rate of
11.000%, and (ii) the related Basis



                                      44
<PAGE>

Risk Carry Forward Amount for the previous Distribution Date not previously
distributed together with interest thereon at a rate equal to the related
Pass-Through Rate (without being limited by the Pool Net WAC Pass-Through
Rate) for such Class of Subordinated Certificates for the most recently ended
Interest Accrual Period.

      Subordinated Certificates: As specified in the Preliminary Statement.

      Subordinated Interest Distribution Amount: With respect to any Class of
Subordinated Certificates and any Distribution Date, interest accrued during
the related Interest Accrual Period on the related Class Principal Balance of
that Class immediately prior to the Distribution Date at the Pass-Through Rate
for that Class reduced (to an amount not less than zero), in the case of such
Class, by the allocable share, if any, for that Class of Prepayment Interest
Shortfalls on the Mortgage Loans to the extent not covered by (x) Compensating
Interest paid by the Master Servicer or the Servicers for the Mortgage Loans
and (y) Relief Act Interest Shortfalls on the Mortgage Loans.

      Subsequent Recoveries: As to any Distribution Date, with respect to a
Liquidated Mortgage Loan that resulted in a Realized Loss in a prior calendar
month, amounts received by the Securities Administrator from the related
Servicer (net of any related expenses permitted to be reimbursed pursuant to
Section 4.02) specifically related to such Liquidated Mortgage Loan.

      Sub-Servicer: Any Person that (i) is considered to be a Servicing
Function Participant, (ii) services Mortgage Loans on behalf of any Servicer,
and (iii) is responsible for the performance (whether directly or through
sub-servicers or Subcontractors) of Servicing functions required to be
performed under this Agreement, any related Servicing Agreement or any
sub-servicing agreement that are identified in Item 1122(d) of Regulation AB.

      Substitution Adjustment Amount: As defined in the second paragraph of
Section 2.05(b).

      Substitution Event: Not Applicable.

      Supplemental Interest Trust: The corpus of a trust created pursuant to
Section 5.10 hereof, consisting of the Corridor Contract and amounts on
deposit in the Class 1-A-1 Reserve Fund.

      Swap Account: Not Applicable.

      Swap Agreement: Not Applicable.

       Swap Counterparty: Not Applicable.

      Swap Payment Allocation: Not Applicable.

      Swap Payment Rate: Not Applicable.

      Swap Termination Date: Not Applicable.

      Swap Termination Payment: Not Applicable.



                                       45
<PAGE>

      Targeted Balance: With respect to any group of Targeted Principal
Classes or Components in the aggregate and any Distribution Date appearing in
Schedule B hereto, the Aggregate Targeted Balance for such group and
Distribution Date. With respect to any other Targeted Principal Class or
Component and any Distribution Date appearing in Schedule B hereto, the
applicable amount appearing opposite such Distribution Date for such Class or
Component.

      Tax Matters Person: The person designated as "tax matters person" in the
manner provided under Treasury regulation ss. 1.860F-4(d) and temporary
Treasury regulation ss.301.6231(a)(7)1T. Initially, the Tax Matters Person
shall be the Securities Administrator.

      Tax Matters Person Certificate: The Class A-R Certificate with a
Denomination of $0.01.

      Three Month Rolling Average: With respect to the end of the Due Period
related to any Distribution Date, the rolling 3 month average percentage of
the aggregate Stated Principal Balance of the Mortgage Loans that are 60 or
more days Delinquent (including Mortgage Loans in foreclosure, REO Property or
discharged in bankruptcy).

      Trigger Event: With respect to any Distribution Date, a Trigger Event is
in effect if (x) the Three Month Rolling Average with respect to the Mortgage
Loans exceeds 50.00% of the Senior Enhancement Percentage for the prior
Distribution Date, or (y) the aggregate amount of Realized Losses on the
Mortgage Loans incurred since the Cut-off Date through the last day of the
related Due Period divided by the aggregate outstanding principal balance of
the Mortgage Loans as of the Cut-off exceeds the applicable percentages set
forth below with respect to such Distribution Date:

Distribution Date                           Percentage

April 2009 -- March 2010...............    0.20% for the first month, plus an
                                          additional 1/12th of 0.35% for each
                                          month thereafter
April 2010 -- March 2011...............    0.55% for the first month, plus an
                                          additional 1/12th of 0.35% for each
                                          month thereafter
April 2011 -- March 2012...............    0.90% for the first month, plus an
                                          additional 1/12th of 0.40% for each
                                          month thereafter
April 2012 --March 2013................    1.30% for the first month, plus an
                                           additional 1/12th of 0.25% for each
                                          month thereafter
April 2013 and thereafter..............    1.55%

      Trust: Morgan Stanley Mortgage Loan Trust 2007-6XS.

      Trust Fund: The corpus of the trust created pursuant to this Agreement
consisting of (i) the Mortgage Loans and all interest and principal received
on or with respect thereto after the Cut-off Date (other than Scheduled
Payments due on or prior to the Cut-off Date) to the extent not applied in
computing the Cut-off Date Principal Balance thereof; (ii) all cash,
instruments or property held or required to be held in the Custodial Accounts,
the Distribution Account and all amounts deposited therein pursuant to the
applicable provisions of this Agreement; (iii) property



                                      46
<PAGE>

that secured a Mortgage Loan and has been acquired by foreclosure,
deed-in-lieu of foreclosure or otherwise; (iv) the Depositor's rights assigned
to the Trustee under the Purchase and Servicing Agreements, as modified by the
Acknowledgements and under the Custodial Agreements; (v) all insurance
policies related to the Mortgage Loans and any insurance proceeds; (vi) the
pledge, control and guaranty agreements and the Limited Purpose Surety Bond
relating to the Additional Collateral Mortgage Loans; (vii) the amounts on
deposit in the Basis Risk Carry Forward Reserve Fund; and (viii) all proceeds
of the conversion, voluntary or involuntary, of any of the foregoing. The
Corridor Contract and the amounts on deposit in the Class 1-A-1 Reserve Fund
are assets of the Supplemental Interest Trust.

      Trustee: LaSalle Bank National Association, a national banking
association, organized under the laws of the United States and any Person
succeeding the Trustee hereunder, or if any successor trustee or any
co-trustee shall be appointed as herein provided, then such successor trustee
and such co-trustee, as the case may be.

      Trustee Mortgage Files: With respect to each Mortgage Loan, the Mortgage
Documents to be retained in the custody and possession of the Trustee or
Custodian on behalf of the Trustee identified in Section 2.01(a) hereof.

      Turbo Allocation Amount: Not applicable.

      UCC: The Uniform Commercial Code as enacted in the relevant
jurisdiction.

      Underwriter: As specified in the Preliminary Statement.

      Underwriter's Exemption: Prohibited Transaction Exemption 2002-41, 67
Fed. Reg. 54487 (2002), as amended (or any successor thereto), or any
substantially similar administrative exemption granted by the U.S. Department
of Labor.

      Underwriting Agreement: The Underwriting Agreement, dated March 27,
2007, among the Seller, the Depositor and the Underwriter.

      Uniform Commercial Code: The Uniform Commercial Code as in effect in any
applicable jurisdiction from time to time.

      Unpaid Interest Shortfall Amount: With respect to each Class of
Certificates, the sum of Relief Act Interest Shortfalls and net prepayment
interest shortfalls on the Mortgage Loans allocated to such Class of
Certificates on that Distribution Date and such amounts from any prior
Distribution Date remaining unpaid.

      Unpaid Realized Loss Amount: With respect to any Class of Subordinated
Certificates, the portion of any Realized Losses on the Mortgage Loans
previously allocated to that Class remaining unpaid from prior Distribution
Dates.

      Unscheduled Principal Distribution Amount: Not applicable.

      Virtual Bank Mortgage Loan: Each Mortgage Loan originated by Lydian
Private Bank and listed on the Mortgage Loan Schedule.



                                      47
<PAGE>

      Virtual Bank Purchase Agreement: The Seller's Purchase, Warranties and
Servicing Agreement listed in Exhibit E hereto between the Seller and Lydian
Private Bank.

      Voting Interests: The portion of the voting rights of all the
Certificates that is allocated to any Certificate for purposes of the voting
provisions of this Agreement. At all times during the term of this Agreement,
1.00% of all Voting Interests shall be allocated to each of the Class OC
Certificates, any Class of Notional Amount Certificates and the Class A-R
Certificates. Voting Interests shall be allocated among all other Classes of
Certificates pro rata based on Class Principal Balances for each Class then
outstanding. Voting Interests shall be allocated among the Certificates within
each such Class in proportion to their Certificate Balances or Percentage
Interests.

      Wachovia Originated Mortgage Loan: Each Mortgage Loan originated by
Wachovia Mortgage Corporation and listed on the Mortgage Loan Schedule.

      Wachovia Purchase Agreement: The Mortgage Loan Purchase and Warranties
Agreement listed in Exhibit E hereto between the Seller and Wachovia Mortgage
Corporation as seller and servicer.

      Wachovia Serviced Mortgage Loan: Each Mortgage Loan serviced by Wachovia
Mortgage Corporation and listed on the Mortgage Loan Schedule.

      Wachovia Servicing Agreement: The Servicing Agreement listed in Exhibit
E hereto between the Seller and Wachovia Mortgage Corporation.

      Weighted Average Net Mortgage Rate: As to any Distribution Date, the
average of the Net Mortgage Rate of each Mortgage Loan, weighted on the basis
of its Stated Principal Balance as of the end of the Prepayment Period related
to the immediately preceding Distribution Date.

      Wells Fargo Serviced Mortgage Loan: Each Mortgage Loan serviced by Wells
Fargo Bank, National Association and listed on the Mortgage Loan Schedule.

      Wells Fargo Servicing Agreement: The Servicing Agreement listed in
Exhibit E hereto between the Seller and Wells Fargo Bank, National
Association.

      Wilmington Finance Mortgage Loan: Each Mortgage Loan originated by
Wilmington Finance, Inc. and listed on the Mortgage Loan Schedule.

      Wilmington Finance Purchase Agreement: The Seller's Purchase, Warranties
and Servicing Agreement listed in Exhibit E hereto between the Seller and
Wilmington Finance, Inc.

      Yield Supplement Amount: With respect to the Class 1-A-1 Certificates
and any Distribution Date on or prior to the Corridor Contract Termination
Date, on which LIBOR exceeds 5.59%, an amount equal to interest for the
related Interest Accrual Period on the Class Principal Balance of the Class
1-A-1 Certificates immediately prior to such Distribution Date at a rate equal
to the excess of (i) the lesser of LIBOR and 9.49% over (ii) 5.59%.



                                      48
<PAGE>

                                  ARTICLE II

                             DECLARATION OF TRUST;
                           ISSUANCE OF CERTIFICATES

      Section 2.01. Creation and Declaration of Trust Fund; Conveyance of
Mortgage Loans.

      (a) Concurrently with the execution and delivery of this Agreement, the
Depositor does hereby transfer, assign, set over, deposit with and otherwise
convey to the Trustee, without recourse, subject to Sections 2.02 and 2.05, in
trust, all the right, title and interest of the Depositor in and to the Trust
Fund. Such conveyance includes, without limitation, (i) the Mortgage Loans,
including the right to all payments of principal and interest received on or
with respect to the Mortgage Loans on and after the Cut-off Date (other than
Scheduled Payments due on or before such date), and all such payments due
after such date but received prior to such date and intended by the related
Mortgagors to be applied after such date; (ii) all of the Depositor's right,
title and interest in and to all amounts from time to time credited to and the
proceeds of the Distribution Account, any Custodial Accounts or any Escrow
Account established with respect to the Mortgage Loans; (iii) all of the
rights and obligations of the Depositor as assignee of the Seller with respect
to the Seller's rights and obligations under the Purchase and Servicing
Agreements pursuant to the Acknowledgements; (iv) all of the Depositor's
right, title or interest in REO Property and the proceeds thereof; (v) all of
the Depositor's rights under any Insurance Policies related to the Mortgage
Loans; (vi) $1,000 (which amount has been delivered by the Depositor to the
Securities Administrator to be held in the Distribution Account until
distributed to the Holders of the Class P Certificates pursuant to Section
5.02(a)) and $100, plus interest, (which amount has been delivered by the
Depositor to the Securities Administrator to be held in the Distribution
Account until distributed to the Holders of the Class A-R Certificates
pursuant to Section 5.02(a)); and (vii) if applicable, the Depositor's
security interest in any collateral pledged to secure the Mortgage Loans,
including the Mortgaged Properties and any Additional Collateral relating to
the Additional Collateral Mortgage Loans, including, but not limited to, the
pledge, control and guaranty agreements and the Limited Purpose Surety Bond,
to have and to hold, in trust; and the Trustee declares that, subject to the
review provided for in Section 2.02, it has received and shall hold the Trust
Fund, as trustee, in trust, for the benefit and use of the Holders of the
Certificates and for the purposes and subject to the terms and conditions set
forth in this Agreement, and, concurrently with such receipt, has caused to be
executed, authenticated and delivered to or upon the order of the Depositor,
in exchange for the Trust Fund, Certificates in the authorized denominations
evidencing the entire ownership of the Trust Fund.

      The foregoing sale, transfer, assignment, set-over, deposit and
conveyance does not and is not intended to result in the creation or
assumption by the Trustee of any obligation of the Depositor, the Seller or
any other Person in connection with the Mortgage Loans or any other agreement
or instrument relating thereto except as specifically set forth therein.

      In connection with such transfer and assignment of the Mortgage Loans,
the Depositor shall cause to be delivered and the Custodian acting on the
Trustee's behalf will continue to hold



                                      49
<PAGE>

the documents or instruments listed below with respect to each Mortgage Loan
(each, a "Trustee Mortgage File") so transferred and assigned:

      (i) with respect to each Mortgage Loan, the original Mortgage Note
endorsed without recourse in proper form to the order of "LaSalle Bank
National Association, as Trustee of Morgan Stanley Mortgage Loan Trust
2007-6XS, Mortgage Pass-Through Certificates, without recourse", or in blank
(in each case, with all necessary intervening endorsements, as applicable);

      (ii) with respect to each Mortgage Loan (other than a Cooperative Loan)
that is not a MERS Mortgage Loan, the original Mortgage with evidence of
recording thereon, or if the original Mortgage has not yet been returned from
the recording office, a copy of such Mortgage certified by the applicable
Originator, title company, escrow agent or closing attorney to be a true copy
of the original of the Mortgage which has been sent for recording in the
appropriate jurisdiction in which the Mortgaged Property is located, and in
the case of the each MERS Mortgage Loan, the original Mortgage, noting the
presence of the MIN of the Mortgage Loans and either language indicating that
the Mortgage Loan is a MOM Loan if the Mortgage Loan is a MOM Loan or if the
Mortgage Loan was not a MOM Loan at origination, the original Mortgage and the
assignment thereof to MERS, with evidence of recording indicated thereon;

      (iii) with respect to each Mortgage Loan (other than a Cooperative Loan)
that is not a MERS Mortgage Loan, the Assignment of Mortgage in form and
substance acceptable for recording in the relevant jurisdiction, such
assignment being either (A) in blank, without recourse, or (B) endorsed to
"LaSalle Bank National Association, as Trustee of Morgan Stanley Mortgage Loan
Trust 2007-6XS, Mortgage Pass-Through Certificates, without recourse";

      (iv) with respect to each Mortgage Loan (other than a Cooperative Loan)
that is not a MERS Mortgage Loan, the originals of all intervening assignments
of the Mortgage, if any, with evidence of recording thereon, or if the
original intervening assignment has not yet been returned from the recording
office, a copy of such assignment certified by the applicable Originator,
title company, escrow agent or closing attorney to be a true copy of the
original of the assignment which has been sent for recording in the
appropriate jurisdiction in which the Mortgaged Property is located;

      (v) with respect to each Mortgage Loan (other than a Cooperative Loan),
the originals of all assumption, modification, consolidation or extension
agreements, if any, with evidence of recording thereon;

      (vi) if any, with respect to each Mortgage Loan (other than a
Cooperative Loan), the original policy of title insurance (or a true copy
thereof) with respect to any such Mortgage Loan, or, if such policy has not
yet been delivered by the insurer, the title commitment or title binder to
issue same;

      (vii) if any, with respect to each Mortgage Loan (other than a
Cooperative Loan), the original power of attorney and guaranty agreement with
respect to such Mortgage Loan;

      (viii) [reserved];

      (ix) with respect to each Mortgage Loan which constitutes a Cooperative
Loan:



                                      50
<PAGE>

            (a)    the original of any security agreement or similar document
                  executed in connection with the Cooperative Loan;

            (b)    the original Recognition Agreement and the original
                  Assignment of Recognition Agreement;

            (c)    UCC-1 financing statements with recording information
                  thereon from the appropriate governmental recording offices
                  if necessary to perfect the security interest of the
                  Cooperative Loan under the Uniform Commercial Code in the
                  jurisdiction in which the Cooperative Property is located,
                  accompanied by UCC-3 financing statements executed in blank
                  for recordation of the change in the secured party
                  thereunder;

            (d)    an Estoppel Letter and/or Consent;

            (e)    a search for (i) federal tax liens, mechanics' liens, lis
                  pendens, judgments of record or otherwise against (x) the
                  Cooperative Corporation and (y) the seller of the
                  Cooperative Unit, (ii) filings of financing statements and
                  (iii) the deed of the cooperative project into the
                  Cooperative Corporation;

            (f)    the guaranty of the Mortgage Note and Cooperative Loan, if
                  any;

            (g)    the original Proprietary Lease and the Assignment of
                  Proprietary Lease executed by the Mortgagor in blank or if
                  the Proprietary Lease has been assigned by the Mortgagor to
                  the Seller, then the Seller must execute an assignment of
                  the Assignment of Proprietary Lease in blank; and

            (h)    if any, the original or certified copy of the certificates
                  evidencing ownership of the Cooperative Shares issued by the
                  Cooperative Corporation and related assignment of such
                  certificates or an assignment of such Cooperative Shares, in
                  blank, executed by the Mortgagor with such signature
                  guaranteed;

      (x) [reserved]; and

      (xi) any other document or instruments required to be delivered.

      In addition, in connection with the assignment of any MERS Mortgage
Loan, it is understood that the related Originator will cause the MERS(R)
System to indicate that such Mortgage Loans have been assigned by the related
Originator to the Trustee in accordance with this Agreement for the benefit of
the Certificateholders by including (or deleting, in the case of Mortgage
Loans which are repurchased in accordance with this Agreement) in such
computer files the information required by the MERS(R) System to identify the
series of Certificates issued in connection with such Mortgage Loans. It is
further understood that the related Originator will not, and the Master
Servicer hereby agrees that it will not, alter the information referenced in
this paragraph with respect to any Mortgage Loan during the term of this
Agreement unless and until such Mortgage Loan is repurchased in accordance
with the terms of this Agreement.



                                      51
<PAGE>

      On or prior to the Closing Date, the Depositor shall cause to be
delivered to the Master Servicer, the Trustee and the Custodian an electronic
copy of the Mortgage Loan Schedule in a form acceptable to the Master
Servicer, the Depositor, the Trustee and the Custodian.

      (b) As soon as is practicable after the Closing Date, the Depositor
shall cause the Servicer of any Additional Collateral Mortgage Loan to deliver
to the applicable Custodian the Assignment and Notice of Transfer with respect
to each Additional Collateral Mortgage Loan as well as the assignments of any
rights with respect to each Additional Collateral Mortgage Loan under any
Limited Purpose Surety Bond.

      (c) In instances where a title insurance policy is required to be
delivered to the applicable Custodian on behalf of the Trustee and is not so
delivered, the Depositor will provide a copy of such title insurance policy to
the applicable Custodian on behalf of the Trustee, as promptly as practicable
after the execution and delivery hereof, but in any case within 180 days of
the Closing Date.

      (d) For Mortgage Loans (if any) that have been prepaid in full after the
Cut-off Date and prior to the Closing Date, the Depositor, in lieu of
delivering the above documents, herewith delivers such amount to the
Securities Administrator, and delivers to the Securities Administrator, the
Trustee, and the applicable Custodian, an Officer's Certificate which shall
include a statement to the effect that all amounts received in connection with
such prepayment that are required to be deposited in the Distribution Account
pursuant to Section 4.01 have been so deposited. All original documents that
are not delivered to the applicable Custodian on behalf of the Trustee shall
be held by the Master Servicer or the related Servicer in trust for the
benefit of the Trustee and the Certificateholders.

      (e) Neither the Depositor nor the Trust will acquire or hold any
Mortgage Loan that would violate the representations made by the Seller set
forth in clauses (iv) through (vi) of Section 2.05(b) hereof.

      Section 2.02. Acceptance of Trust Fund by Trustee; Review of
                    Documentation for Trust Fund.

      (a) The Trustee, by execution and delivery hereof, acknowledges receipt
by it of notice from the Custodian that each holds the documents identified in
the Initial Custodial Certification in the form annexed hereto as Exhibit L-1
(the "Initial Custodial Certification") pertaining to the Mortgage Loans
listed on the Mortgage Loan Schedule.

      (b) Nothing in this Agreement shall be construed to constitute an
assumption by the Trust Fund, the Trustee, any Custodian or the
Certificateholders of any unsatisfied duty, claim or other liability on any
Mortgage Loan or to any Mortgagor.

      (c) Each of the parties hereto acknowledges that (i) the Custodian has
delivered to the Depositor, the Master Servicer and the Trustee, the Initial
Custodial Certification, in the form annexed hereto as Exhibit L-1, stating
that it has performed the applicable review of the Mortgage Loans as required
herein and (ii) thereafter, if applicable, the Custodian shall perform the
applicable review of the Mortgage Loans and deliver the further certifications
(including but not limited to the Final Custodial Certification) as provided
herein.



                                      52
<PAGE>

      With respect to the MSMCI Mortgage Loans only, not later than 180 days
after the Closing Date, the Trustee shall enforce the related Custodian's
obligation, to deliver to the Depositor, the Master Servicer and the Trustee a
Final Custodial Certification in the form annexed hereto as Exhibit L-2 (the
"Final Custodial Certification"), with any applicable exceptions noted
thereon. To the extent that the Custodian must deliver a Final Certification,
the Trustee shall enforce the Custodian's obligation to make available, upon
request of any Certificateholder, a copy of any exceptions noted on the
Initial Custodial Certification or the Final Custodial Certification.

      (d) Upon execution of this Agreement, the Depositor hereby delivers to
the Trustee (with a copy to the Master Servicer) and the Trustee acknowledges
receipt of the Acknowledgements, together with the related Purchase and
Servicing Agreements.

      (e) Neither the Trustee nor the Custodian shall make any representation
as to: (i) the validity, legality, sufficiency, enforceability or genuineness
of any of the documents contained in the Trustee Mortgage File of any of the
Mortgage Loans identified on the Mortgage Loan Schedule, or (ii) the
collectability, insurability, perfection, priority, effectiveness or
suitability of any such Mortgage Loan. Except as specifically required
hereunder, neither the Trustee nor the Custodian shall be responsible to
verify the validity, sufficiency or genuiness of any document in the Trustee
Mortgage File.

      Section 2.03. Representations and Warranties of the Depositor.

      (a) The Depositor hereby represents and warrants to the Trustee, for the
benefit of the Certificateholders, and to the Master Servicer and the
Securities Administrator as of the Closing Date or such other date as is
specified, that:

            (i) the Depositor is a corporation duly organized, validly
      existing and in good standing under the laws governing its creation and
      existence and has full corporate power and authority to own its
      property, to carry on its business as presently conducted, to enter into
      and perform its obligations under this Agreement, and to create the
      trust pursuant hereto;

            (ii) the execution and delivery by the Depositor of this Agreement
      have been duly authorized by all necessary corporate action on the part
      of the Depositor; neither the execution and delivery of this Agreement,
      nor the consummation of the transactions herein contemplated, nor
      compliance with the provisions hereof, will conflict with or result in a
      breach of, or constitute a default under, any of the provisions of any
      law, governmental rule, regulation, judgment, decree or order binding on
      the Depositor or its properties or the certificate of incorporation or
      bylaws of the Depositor;

            (iii) the execution, delivery and performance by the Depositor of
      this Agreement and the consummation of the transactions contemplated
      hereby do not require the consent or approval of, the giving of notice
      to, the registration with, or the taking of any other action in respect
      of, any state, federal or other governmental authority or agency, except
      such as has been obtained, given, effected or taken prior to the date
      hereof;



                                      53
<PAGE>

            (iv) this Agreement has been duly executed and delivered by the
      Depositor and, assuming due authorization, execution and delivery by the
      Trustee, the Master Servicer and the Securities Administrator,
      constitutes a valid and binding obligation of the Depositor enforceable
      against it in accordance with its terms except as such enforceability
      may be subject to (A) applicable bankruptcy and insolvency laws and
      other similar laws affecting the enforcement of the rights of creditors
      generally and (B) general principles of equity regardless of whether
      such enforcement is considered in a proceeding in equity or at law;

            (v) there are no actions, suits or proceedings pending or, to the
      knowledge of the Depositor, threatened or likely to be asserted against
      or affecting the Depositor, before or by any court, administrative
      agency, arbitrator or governmental body (A) with respect to any of the
      transactions contemplated by this Agreement or (B) with respect to any
      other matter which in the judgment of the Depositor will be determined
      adversely to the Depositor and will if determined adversely to the
      Depositor materially and adversely affect it or its business, assets,
      operations or condition, financial or otherwise, or adversely affect its
      ability to perform its obligations under this Agreement;

            (vi) immediately prior to the transfer and assignment of the
      Mortgage Loans to the Trustee, the Depositor was the sole owner of
      record and holder of each Mortgage Loan, and the Depositor had good and
      marketable title thereto, and had full right to transfer and sell each
      Mortgage Loan to the Trustee free and clear, subject only to (1) liens
      of current real property taxes and assessments not yet due and payable
      and, if the related Mortgaged Property is a condominium unit, any lien
      for common charges permitted by statute, (2) covenants, conditions and
      restrictions, rights of way, easements and other matters of public
      record as of the date of recording of such Mortgage acceptable to
      mortgage lending institutions in the area in which the related Mortgaged
      Property is located and specifically referred to in the lender's title
      insurance policy or attorney's opinion of title and abstract of title
      delivered to the originator of such Mortgage Loan, and (3) such other
      matters to which like properties are commonly subject which do not,
      individually or in the aggregate, materially interfere with the benefits
      of the security intended to be provided by the Mortgage, of any
      encumbrance, equity, participation interest, lien, pledge, charge, claim
      or security interest, and had full right and authority, subject to no
      interest or participation of, or agreement with, any other party, to
      sell and assign each Mortgage Loan pursuant to this Agreement;

            (vii) This Agreement creates a valid and continuing security
      interest (as defined in the applicable Uniform Commercial Code (the
      "UCC"), in the Mortgage Loans in favor of the Trustee, which security
      interest is prior to all other liens, and is enforceable as such against
      creditors of and purchasers from the Depositor;

            (viii) The Mortgage Loans constitute "instruments" within the
      meaning of the applicable UCC;

            (ix) Other than the security interest granted to the Trustee
      pursuant to this Agreement, the Depositor has not pledged, assigned,
      sold, granted a security interest in, or otherwise conveyed any of the
      Mortgage Loans. The Depositor has not authorized the



                                      54
<PAGE>

      filing of and is not aware of any financing statement against the
      Depositor that includes a description of the collateral covering the
      Mortgage Loans other than a financing statement relating to the security
      interest granted to the Trustee hereunder or that has been terminated.
      The Depositor is not aware of any judgment or tax lien filings against
      the Depositor;

            (x) None of the Mortgage Loans have any marks or notations
      indicating that such Mortgage Loans have been pledged, assigned or
      otherwise conveyed to any Person other than the Trustee; and

            (xi) The Depositor has received all consents and approvals
      required by the terms of the Mortgage Loans to convey the Mortgage Loans
      hereunder to the Trustee.

      The foregoing representations made in this Section 2.03 shall survive
the termination of this Agreement and shall not be waived by any party hereto.

      Section 2.04. Representations and Warranties of the Depositor and the
                    Seller as to the Mortgage Loans.

      The Depositor hereby represents and warrants to the Trustee with respect
to the Mortgage Loans or each Mortgage Loan, as the case may be, as of the
date hereof or such other date set forth herein that as of the Closing Date:

      (a) Immediately prior to the transfer and assignment contemplated
herein, the Depositor was the sole owner and holder of the Mortgage Loans. The
Mortgage Loans were not assigned or pledged by the Depositor and the Depositor
had good and marketable title thereto, and the Depositor had full right to
transfer and sell the Mortgage Loans to the Trustee, for the benefit of the
Certificateholders, free and clear of any encumbrance, participation interest,
lien, equity, pledge, claim or security interest and had full right and
authority subject to no interest or participation in, or agreement with any
other party to sell or otherwise transfer the Mortgage Loans.

      (b) As of the Closing Date, the Depositor has transferred all right,
title and interest in the Mortgage Loans to the Trustee on behalf of the
Trust.

      (c) As of the Closing Date, the Depositor has not transferred the
Mortgage Loans to the Trustee on behalf of the Trust with any intent to
hinder, delay or defraud an of its creditors.

      It is understood and agreed that the representations and warranties set
forth in this Section 2.04 shall survive delivery of the respective Mortgage
Files to the Trustee or the Custodian and shall inure to the benefit of the
Trustee, notwithstanding any restrictive or qualified endorsement or
assignment.

      Section 2.05. Representations and Warranties of the Seller; Discovery of
                    Breach; Repurchase or Substitution of Mortgage Loans.



                                      55
<PAGE>

      (a) With respect to the MSMCI Mortgage Loans the Seller hereby makes the
representations and warranties contained in Section 3.01 of the MSMCI Purchase
Agreement to and for the benefit of the Depositor, the Trustee and the Trust
Fund.

      The Seller hereby represents and warrants that no Mortgage Loan contains
a provision whereby the related mortgagor is permitted to convert the Mortgage
Rate from an adjustable rate to a fixed rate.

      With respect to the FNBN Mortgage Loans the Seller hereby makes the
representations and warranties contained in Section 9.02 of the FNBN Purchase
Agreement (other than the representation contained in Section 9.02(b) of the
FNBN Purchase Agreement) to and for the benefit of the Depositor, the Trustee
and the Trust Fund. With respect to the FNBN Mortgage Loans the Seller hereby
represents and warrants to and for the benefit of the Depositor, the Trustee
and the Trust Fund that all payments due on or prior to the Cut-off Date for
each FNBN Mortgage Loan have been made as of the Closing Date, such FNBN
Mortgage Loan is not delinquent thirty (30) days or more in payment and has
not been dishonored; there are no material defaults under the terms of such
FNBN Mortgage Loan; the Seller has not advanced funds, or induced, solicited
or knowingly received any advance of funds from a party other than the owner
of the Mortgaged Property subject to the Mortgage, directly or indirectly, for
the payment of any amount required by any FNBN Mortgage Loan; as to each FNBN
Mortgage Loan, there has been no more than one thirty (30) day delinquency
during the immediately preceding thirty-day period. The Seller agrees to
comply with the provisions of this Section 2.05 in respect of a breach of any
of such representations and warranties.

      With respect to the PHH Serviced Mortgage Loans the Seller hereby makes
the representations and warranties contained in Sections 3.03 (4), (20), (21),
(25, (31) and (58) of the PHH Purchase Agreement to and for the benefit of the
Depositor, the Trustee and the Trust Fund. With respect to the PHH Serviced
Mortgage Loans the Seller hereby represents and warrants to and for the
benefit of the Depositor, the Trustee and the Trust Fund that all payments due
on or prior to the Cut-off Date for each PHH Serviced Mortgage Loan have been
made as of the Closing Date, such PHH Serviced Mortgage Loan is not delinquent
thirty (30) days or more in payment and has not been dishonored; there are no
material defaults under the terms of such PHH Serviced Mortgage Loan; the
Seller has not advanced funds, or induced, solicited or knowingly received any
advance of funds from a party other than the owner of the Mortgaged Property
subject to the Mortgage, directly or indirectly, for the payment of any amount
required by any PHH Serviced Mortgage Loan; as to each PHH Serviced Mortgage
Loan, there has been no more than one thirty (30) day delinquency during the
immediately preceding thirty-day period. The Seller agrees to comply with the
provisions of this Section 2.05 in respect of a breach of any of such
representations and warranties.

      With respect to the Virtual Bank Mortgage Loans the Seller hereby makes
the representations and warranties contained in Section 9.02 of the Virtual
Bank Purchase Agreement (other than the representation contained in Section
9.02(b) of the Virtual Bank Purchase Agreement) to and for the benefit of the
Depositor, the Trustee and the Trust Fund. With respect to the Virtual Bank
Mortgage Loans the Seller hereby represents and warrants to and for the
benefit of the Depositor, the Trustee and the Trust Fund that all payments due
on or prior to the Cut-off Date for each Virtual Bank Mortgage Loan have been
made as of the Closing



                                      56
<PAGE>

Date, such Virtual Bank Mortgage Loan is not delinquent thirty (30) days or
more in payment and has not been dishonored; there are no material defaults
under the terms of such Virtual Bank Mortgage Loan; the Seller has not
advanced funds, or induced, solicited or knowingly received any advance of
funds from a party other than the owner of the Mortgaged Property subject to
the Mortgage, directly or indirectly, for the payment of any amount required
by any Virtual Bank Mortgage Loan; as to each Virtual Bank Mortgage Loan,
there has been no more than one thirty (30) day delinquency during the
immediately preceding thirty-day period. The Seller agrees to comply with the
provisions of this Section 2.05 in respect of a breach of any of such
representations and warranties.

      With respect to the Wachovia Serviced Mortgage Loans the Seller hereby
makes the representations and warranties contained in Section 3.02 of the
Wachovia Purchase Agreement (other than the representation contained in
Section 3.02(d) of the Wachovia Purchase Agreement) to and for the benefit of
the Depositor, the Trustee and the Trust Fund. With respect to the Wachovia
Serviced Mortgage Loans the Seller hereby represents and warrants to and for
the benefit of the Depositor, the Trustee and the Trust Fund that all payments
due on or prior to the Cut-off Date for each Wachovia Serviced Mortgage Loan
have been made as of the Closing Date, such Wachovia Serviced Mortgage Loan is
not delinquent thirty (30) days or more in payment and has not been
dishonored; there are no material defaults under the terms of such Wachovia
Serviced Mortgage Loan; the Seller has not advanced funds, or induced,
solicited or knowingly received any advance of funds from a party other than
the owner of the Mortgaged Property subject to the Mortgage, directly or
indirectly, for the payment of any amount required by any Wachovia Serviced
Mortgage Loan; as to each Wachovia Serviced Mortgage Loan, there has been no
more than one thirty (30) day delinquency during the immediately preceding
thirty-day period. The Seller agrees to comply with the provisions of this
Section 2.05 in respect of a breach of any of such representations and
warranties.

      With respect to the Wilmington Finance Mortgage Loans the Seller hereby
makes the representations and warranties contained in Section 9.02 of the
Wilmington Finance Purchase Agreement (other than the representation contained
in Section 9.02(b) of the Wilmington Finance Purchase Agreement) to and for
the benefit of the Depositor, the Trustee and the Trust Fund. With respect to
the Wilmington Finance Mortgage Loans the Seller hereby represents and
warrants to and for the benefit of the Depositor, the Trustee and the Trust
Fund that all payments due on or prior to the Cut-off Date for each Wilmington
Finance Mortgage Loan have been made as of the Closing Date, such Wilmington
Finance Mortgage Loan is not delinquent thirty (30) days or more in payment
and has not been dishonored; there are no material defaults under the terms of
such Wilmington Finance Mortgage Loan; the Seller has not advanced funds, or
induced, solicited or knowingly received any advance of funds from a party
other than the owner of the Mortgaged Property subject to the Mortgage,
directly or indirectly, for the payment of any amount required by any
Wilmington Finance Mortgage Loan; as to each Wilmington Finance Mortgage Loan,
there has been no more than one thirty (30) day delinquency during the
immediately preceding thirty-day period. The Seller agrees to comply with the
provisions of this Section 2.05 in respect of a breach of any of such
representations and warranties.

      The Seller hereby represents and warrants to the Trustee with respect to
the Mortgage Loans as of the date hereof or such other date set forth herein
that as of the Closing Date:



                                      57
<PAGE>

            (i) Each Mortgage Loan at origination complied in all material
      respects with applicable predatory and abusive lending laws and
      consummation of the transactions contemplated by this Agreement will not
      involve the violation of any such laws.

            (ii) All of the Mortgage Loans were originated in compliance with
      all applicable laws, including, but not limited to, all applicable
      anti-predatory and abusive lending laws.

            (iii) None of the Mortgage Loans is covered by the Home Ownership
      and Equity Protection Act of 1994 ("HOEPA").

            (iv) None of the Mortgage Loans is a "high cost" loan as defined
      by applicable predatory and abusive lending laws.

            (v) No Mortgage Loan is a High Cost Loan or Covered Loan, as
      applicable, and with respect to the foregoing, the terms "High Cost
      Loan" and "Covered Loan" have the meaning assigned to them in the then
      current version of Standard & Poor's LEVELS(R), which is now Version 5.7
      Glossary Revised, Appendix E which is attached hereto as Exhibit Q (the
      "Glossary") where (x) a "High Cost Loan" is each loan identified in the
      column "Category under applicable anti-predatory lending law" of the
      table entitled "Standard & Poor's High Cost Loan Categorization" in the
      Glossary as each such loan is defined in the applicable anti-predatory
      lending law of the State or jurisdiction specified in such table and (y)
      a "Covered Loan" is each loan identified in the column "Category under
      applicable anti-predatory lending law" of the table entitled "Standard &
      Poor's High Covered Loan Categorization" in the Glossary as each such
      loan is defined in the applicable anti-predatory lending law of the
      State or jurisdiction specified in such table.

            (vi) No Mortgage Loan originated on or after October 1, 2002
      through March 6, 2003 is governed by the Georgia Fair Lending Act.

      Upon discovery by the Depositor, the Seller or the related Originator or
receipt of written notice of any materially defective document in, or,
following the date of delivery to the Trustee of the Custodian's
certifications, that a document is missing from, a Trustee Mortgage File, or
discovery by the Trustee, the Depositor, the Seller or the related Originator
of the breach by such Originator or Seller of any representation or warranty
under the related Purchase and Servicing Agreement, as modified by the
Acknowledgement, in the case of the Originator, or under this Agreement, in
the case of the Seller, in respect of any Mortgage Loan which materially
adversely affects the value of that Mortgage Loan or the interest therein of
the Certificateholders (a "Defective Mortgage Loan") (each of the Depositor,
the Seller and the related Originator hereby agreeing to give written notice
thereof to the Trustee and the other of such parties), the Trustee, or its
designee, shall promptly notify the Depositor and the Seller or the related
Originator, as applicable, in writing of such nonconforming or missing
document or breach and request that the Seller or related Originator deliver
such missing document or cure or cause the cure of such defect or breach
within a period of time specified in the related Purchase and Servicing
Agreement, and if the Seller or related Originator, as applicable, does not
deliver such missing document or cure such defect or breach in all material
respects during such period, the Trustee,



                                      58
<PAGE>

shall enforce the obligations of the related Originator under the related
Purchase and Servicing Agreement, as modified by the Acknowledgement, or the
Seller under this Agreement, as applicable, and cause the related Originator
or the Seller, as the case may be, to repurchase that Mortgage Loan from the
Trust Fund at the Purchase Price on or prior to the Determination Date
following the expiration of such specified period (subject to Section 2.05(c)
below); provided, however, that, in connection with any such breach that could
not reasonably have been cured within such specified period (unless permitted
a greater period of time to cure under the related Purchase and Servicing
Agreement), subject to Section 2.05(c) below, if the related Originator or the
Seller, as applicable, shall have commenced to cure such breach within such
specified period, the related Originator or the Seller shall be permitted to
proceed thereafter diligently and expeditiously to cure the same within such
additional time as is reasonably necessary to cure such breach. To the extent
that the amount by which the Purchase Price (as defined in this Agreement)
exceeds the repurchase price payable by the related Originator under the
related Purchase and Servicing Agreement, including any costs and damages that
are incurred by the Trust Fund as a result of any violation of any applicable
federal, state, or local predatory or abusive lending law arising from or in
connection with the origination of any Mortgage Loan repurchased by the
related Originator or the Seller, the payment of such excess shall be borne by
the Seller. The Purchase Price for the repurchased Mortgage Loan shall be
deposited in the related Distribution Account, and the Trustee, or its
designee, upon receipt of written certification from the Securities
Administrator of such deposit, shall release or cause the Custodian to release
to the related Originator or the Seller, as applicable, the related Trustee
Mortgage File and shall execute and deliver such instruments of transfer or
assignment, in each case without recourse, representation or warranties, as
either party shall furnish to it and as shall be necessary to vest in such
party any Mortgage Loan released pursuant hereto and the Trustee, or its
designee, shall have no further responsibility with regard to such Trustee
Mortgage File (it being understood that the Trustee shall have no
responsibility for determining the sufficiency of such assignment for its
intended purpose). If pursuant to the foregoing provisions the related
Originator or the Seller repurchases a Mortgage Loan that is a MERS Mortgage
Loan, the related Servicer shall cause MERS to designate on the MERS(R) System
the related Originator or the Seller, as applicable, as the beneficial holder
of such Mortgage Loan.

      In lieu of repurchasing any such Mortgage Loan as provided above, either
party may cause such Mortgage Loan to be removed from the Trust Fund (in which
case it shall become a Deleted Mortgage Loan) and substitute one or more
Replacement Mortgage Loans in the manner and subject to the limitations set
forth in Section 2.05(b) below. It is understood and agreed that the
obligations of the Originators and the Seller to cure or to repurchase (or to
substitute for) any related Mortgage Loan as to which a document is missing, a
material defect in a constituent document exists or as to which such a breach
has occurred and is continuing shall constitute the sole remedy against the
such party respecting such omission, defect or breach available to the Trustee
on behalf of the Certificateholders.

      (b) Any substitution of Replacement Mortgage Loans for Deleted Mortgage
Loans made pursuant to Section 2.05(a) above must be effected prior to the
last Business Day that is within two years after the Closing Date. As to any
Deleted Mortgage Loan for which the related Originator or the Seller
substitutes a Replacement Mortgage Loan or Loans, such substitution shall be
effected by delivering to the Custodian, on behalf of the Trustee, for such
Replacement Mortgage Loan or Loans, the Mortgage Note, the Mortgage, any
related



                                       59
<PAGE>

assignment thereof and the Acknowledgement to the Trustee, and such other
documents and agreements, with all necessary endorsements thereon, together
with an Officers' Certificate stating that each such Replacement Mortgage Loan
satisfies the definition thereof and specifying the Substitution Adjustment
Amount (as described below), if any, in connection with such substitution.
Monthly Payments due with respect to Replacement Mortgage Loans in the month
of substitution shall not be included as part of the Trust Fund and shall be
retained by the related Originator or the Seller, as applicable. For the month
of substitution, distributions to the Certificateholders shall reflect the
collections and recoveries in respect of such Deleted Mortgage in the Due
Period preceding the month of substitution and the related Originator or the
Seller, as applicable, shall thereafter be entitled to retain all amounts
subsequently received in respect of such Deleted Mortgage Loan. Upon such
substitution, such Replacement Mortgage Loan shall constitute part of the
Trust Fund and shall be subject in all respects to the terms of this Agreement
and the related Purchase and Servicing Agreement, as modified by the related
Acknowledgement, including all representations and warranties thereof included
in such Purchase and Servicing Agreement, as modified by the Acknowledgement,
in each case as of the date of substitution.

      For any month in which an Originator or the Seller substitutes one or
more Replacement Mortgage Loans for one or more Deleted Mortgage Loans, the
related Servicer shall determine the excess (each, a "Substitution Adjustment
Amount"), if any, by which the aggregate Purchase Price of all such Deleted
Mortgage Loans exceeds the aggregate Stated Principal Balance of the
Replacement Mortgage Loans replacing such Deleted Mortgage Loans, together
with one month's interest on such excess amount at the applicable Net Mortgage
Rate. On the date of such substitution, the related Originator or Seller, as
applicable, shall deliver or cause to be delivered to the related Servicer for
deposit in the related Custodial Account an amount equal to the related
Substitution Adjustment Amount, if any, and the Custodian, on behalf of the
Trustee, upon receipt of the related Replacement Mortgage Loan or Loans and
Request for Release and certification by such Servicer of such deposit, shall
release to the related Originator or the Seller, as applicable, the related
Trustee Mortgage File or Files and the Trustee or the Custodian, as
applicable, shall execute and deliver such instruments of transfer or
assignment, in each case without recourse, as the related Originator or Seller
shall deliver to it and as shall be necessary to vest therein any Deleted
Mortgage Loan released pursuant hereto.

      In addition, the related Originator or the Seller, as applicable, shall
obtain at its own expense and deliver to the Trustee and the Securities
Administrator an Opinion of Counsel to the effect that such substitution
(either specifically or as a class of transactions) shall not cause an Adverse
REMIC Event. If such Opinion of Counsel cannot be delivered, then such
substitution may only be effected at such time as the required Opinion of
Counsel can be given.

      (c) Upon discovery by the related Originator, the Seller, the Master
Servicer, the Depositor or the Trustee that any Mortgage Loan does not
constitute a "qualified mortgage" within the meaning of Section 860G(a)(3) of
the Code, the party discovering such fact shall within two Business Days give
written notice thereof to the other parties. In connection therewith, the
applicable party shall repurchase or, subject to the limitations set forth in
Section 2.05(b), substitute one or more Replacement Mortgage Loans for the
affected Mortgage Loan within 90 days of the earlier of discovery or receipt
of such notice with respect to such affected Mortgage Loan. Any such
repurchase or substitution shall be made in the same manner



                                      60
<PAGE>

as set forth in Section 2.05(a) above and/or in accordance with this Section
2.05(c). The Trustee shall re-convey to the related Originator or the Seller,
as applicable, the Mortgage Loan to be released pursuant hereto in the same
manner, and on the same terms and conditions, as it would a Mortgage Loan
repurchased for breach of a representation or warranty.

      Section 2.06. Grant Clause.

      (a) It is intended that the conveyance of the Depositor's right, title
and interest in and to property constituting the Trust Fund pursuant to this
Agreement shall constitute, and shall be construed as, a sale of such property
and not a grant of a security interest to secure a loan. However, if such
conveyance is deemed to be in respect of a loan, it is intended that: (1) the
rights and obligations of the parties shall be established pursuant to the
terms of this Agreement; (2) the Depositor hereby grants to the Trustee for
the benefit of the Holders of the Certificates a first priority security
interest in all of the Depositor's right, title and interest in, to and under,
whether now owned or hereafter acquired, the Trust Fund and all proceeds of
any and all property constituting the Trust Fund to secure payment of the
Certificates; and (3) this Agreement shall constitute a security agreement
under applicable law. If such conveyance is deemed to be in respect of a loan
and the trust created by this Agreement terminates prior to the satisfaction
of the claims of any Person holding any Certificate, the security interest
created hereby shall continue in full force and effect and the Trustee shall
be deemed to be the collateral agent for the benefit of such Person, and all
proceeds shall be distributed as herein provided.

      (b) The Depositor shall, to the extent consistent with this Agreement,
take such reasonable actions as may be necessary to ensure that, if this
Agreement were deemed to create a security interest in the Mortgage Loans and
the other property described above, such security interest would be deemed to
be a perfected security interest of first priority under applicable law and
will be maintained as such throughout the term of this Agreement. The
Depositor will, at its own expense, make all initial filings on or about the
Closing Date and shall forward a copy of such filing or filings to the
Trustee. Without limiting the generality of the foregoing, the Depositor shall
prepare and forward for filing, or shall cause to be forwarded for filing, at
the expense of the Depositor, all filings necessary to maintain the
effectiveness of any original filings necessary under the relevant UCC to
perfect the Trustee's security interest in or lien on the Mortgage Loans,
including without limitation (x) continuation statements, and (y) such other
statements as may be occasioned by (1) any change of name of an Originator,
the Depositor or the Trustee, (2) any change of location of the place of
business or the chief executive office of the Seller or the Depositor, (3) any
transfer of any interest of an Originator or the Depositor in any Mortgage
Loan or (4) any change under the relevant UCC or other applicable laws.
Neither the Originators nor the Depositor shall organize under the law of any
jurisdiction other than the State under which each is organized as of the
Closing Date (whether changing its jurisdiction of organization or organizing
under an additional jurisdiction) without giving 30 days prior written notice
of such action to its immediate and intermediate transferee, including the
Trustee. Before effecting such change, any Originator or the Depositor
proposing to change its jurisdiction of organization shall prepare and file in
the appropriate filing office any financing statements or other statements
necessary to continue the perfection of the interests of its immediate and
intermediate transferees, including the Trustee, in the Mortgage Loans. In
connection with the transactions contemplated by this Agreement, each of the
Originators and the Depositor authorizes its immediate or intermediate
transferee (but not the Trustee) to file in any filing



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<PAGE>

office any initial financing statements, any amendments to financing
statements, any continuation statements, or any other statements or filings
described in this paragraph (b).

      Section 2.07. Depositor's Option to Purchase Breached Mortgage Loans.

      Subject to the terms specified in this Agreement, the Depositor has the
option, but is not obligated, to purchase from the Trust Fund any Breached
Mortgage Loan at the Repurchase Price; provided that the entity from which the
Seller purchased the Mortgage Loan has both (a) agreed to purchase the
Mortgage Loan from the Depositor and (b) has represented to the Seller that it
has the ability to purchase such Mortgage Loan from the Depositor, as soon as
is practicable thereafter at the Repurchase Price.

      Section 2.08. Release of Mortgage Documents for Servicing.

      From time to time and as appropriate for the foreclosure or servicing of
any of the Mortgage Loans, the Custodian shall, upon receipt in writing,
facsimile or electronic transmission from the Master Servicer or a Servicer of
a Request for Release release to the Master Servicer or such Servicer the
Mortgage Documents set forth in such Request for Release. All Mortgage
Documents released by the Custodian to the Master Servicer or a Servicer
pursuant to this Section 2.08 shall be held by the Master Servicer or such
Servicer in trust for the benefit of the Trust pursuant to the applicable
Purchase and Servicing Agreement. Upon the repurchase of any Mortgage Loan or
upon the payment in full of any Mortgage Loan, and upon receipt by the
Custodian of (i) the Request for Release (which Request for Release shall
include a statement to the effect that all amounts payable to the Trust in
connection with a repurchase have been deposited in the related Custodial
Account or the Collection Account or (ii) direction of the Depositor or the
Trustee, as applicable, the Custodian shall promptly release the related
Mortgage Documents in accordance with such Request for Release or direction.

                                  ARTICLE III

                               THE CERTIFICATES

      Section 3.01. The Certificates.

      (a) The Certificates shall be issuable in registered form only and shall
be securities governed by Article 8 of the New York Uniform Commercial Code.
The Book-Entry Certificates will be evidenced by one or more certificates,
beneficial ownership of which will be held in the dollar denominations in
Certificate Balance, or Notional Amount, as applicable, or in the Percentage
Interests, specified herein. Each Class of Certificates will be issued in the
minimum denominations and integral multiples thereof of the initial
Certificate Balance (or Notional Amount) specified in the Preliminary
Statement hereto.

      (b) The Certificates shall be executed by manual or facsimile signature
on behalf of the Trustee by an authorized officer of the Trustee or of the
Securities Administrator on the Trustee's behalf. Each Certificate shall, on
original issue, be authenticated by the Authenticating Agent upon the order of
the Depositor upon receipt by the Trustee (or its Custodian) of the Trustee
Mortgage Files described in Section 2.01. No Certificate shall be entitled to
any benefit under this Agreement, or be valid for any purpose, unless there
appears on such Certificate a



                                      62
<PAGE>

certificate of authentication substantially in the form provided for herein,
executed by an authorized officer of the Authenticating Agent, by manual
signature, and such certification upon any Certificate shall be conclusive
evidence, and the only evidence, that such Certificate has been duly
authenticated and delivered hereunder. All Certificates shall be dated the
date of their authentication. At any time and from time to time after the
execution and delivery of this Agreement, the Depositor may deliver
Certificates executed by or on behalf of the Trustee to the Authenticating
Agent for authentication and the Authenticating Agent shall authenticate and
deliver such Certificates as in this Agreement provided and not otherwise.

      (c) The Class OC, Class P and Class A-R Certificates offered and sold in
reliance on the exemption from registration under Rule 144A under the Act
shall be issued initially in definitive, fully registered form without
interest coupons with the applicable legends set forth in Exhibit A added to
the forms of such Certificates (each, a "Restricted Global Security").

      Section 3.02. Registration.

      The Securities Administrator is hereby appointed, and the Securities
Administrator hereby accepts its appointment as, initial Certificate Registrar
in respect of the Certificates and shall maintain books for the registration
and for the transfer of Certificates (the "Certificate Register"). The Trustee
may appoint a bank or trust company to act as successor Certificate Registrar.
A registration book shall be maintained for the Certificates collectively. The
Certificate Registrar may resign or be discharged or removed and a new
successor may be appointed in accordance with the procedures and requirements
set forth in Sections 6.06 and 6.07 hereof with respect to the resignation,
discharge or removal of the Securities Administrator and the appointment of a
successor Securities Administrator. The Certificate Registrar may appoint, by
a written instrument delivered to the Holders and the Master Servicer, any
bank or trust company to act as co-registrar under such conditions as the
Certificate Registrar may prescribe; provided, however, that the Certificate
Registrar shall not be relieved of any of its duties or responsibilities
hereunder by reason of such appointment.

      Section 3.03. Transfer and Exchange of Certificates.

      (a) A Certificate (other than Book-Entry Certificates which shall be
subject to Section 3.09 hereof) may be transferred by the Holder thereof only
upon presentation and surrender of such Certificate at the office of the
Certificate Registrar duly endorsed or accompanied by an assignment duly
executed by such Holder or his duly authorized attorney in such form as shall
be satisfactory to the Certificate Registrar. Upon the transfer of any
Certificate in accordance with the preceding sentence, the Securities
Administrator on behalf of the Trustee shall execute, and the Authenticating
Agent shall authenticate and deliver to the transferee, one or more new
Certificates of the same Class and evidencing, in the aggregate, the same
aggregate Certificate Balance (or Notional Amount) as the Certificate being
transferred. No service charge shall be made to a Certificateholder for any
registration of transfer of Certificates, but the Certificate Registrar may
require payment of a sum sufficient to cover any tax or governmental charge
that may be imposed in connection with any registration of transfer of
Certificates.



                                      63
<PAGE>

      (b) A Certificate may be exchanged by the Holder thereof for any number
of new Certificates of the same Class, in authorized denominations,
representing in the aggregate the same Certificate Balance (or Notional
Amount) as the Certificate surrendered, upon surrender of the Certificate to
be exchanged at the office of the Certificate Registrar duly endorsed or
accompanied by a written instrument of transfer duly executed by such Holder
or his duly authorized attorney in such form as is satisfactory to the
Certificate Registrar. Certificates delivered upon any such exchange will
evidence the same obligations, and will be entitled to the same rights and
privileges, as the Certificates surrendered. No service charge shall be made
to a Certificateholder for any exchange of Certificates, but the Certificate
Registrar may require payment of a sum sufficient to cover any tax or
governmental charge that may be imposed in connection with any exchange of
Certificates. Whenever any Certificates are so surrendered for exchange, the
Securities Administrator on behalf of the Trustee shall execute, and the
Authenticating Agent shall authenticate, date and deliver the Certificates
which the Certificateholder making the exchange is entitled to receive.

      (c) By acceptance of a Restricted Certificate, whether upon original
issuance or subsequent transfer, each Holder of such a Certificate
acknowledges the restrictions on the transfer of such Certificate set forth
thereon and agrees that it will transfer such a Certificate only as provided
herein.

      The following restrictions shall apply with respect to the transfer and
registration of transfer of a Restricted Certificate to a transferee that
takes delivery in the form of a Definitive Certificate:

            (i) The Certificate Registrar shall register the transfer of a
      Restricted Certificate if the requested transfer is (x) to the Depositor
      or an affiliate (as defined in Rule 405 under the 1933 Act) of the
      Depositor or (y) being made to a "qualified institutional buyer" (a
      "QIB") as defined in Rule 144A under the Securities Act of 1933, as
       amended (the "Act") by a transferor that has provided the Certificate
      Registrar with a certificate in the form of Exhibit H hereto; and

            (ii) The Certificate Registrar shall register the transfer of a
      Restricted Certificate if the requested transfer is being made to an
      "accredited investor" under Rule 501(a)(1), (2), (3) or (7) under the
      Act, or to any Person all of the equity owners in which are such
      accredited investors, by a transferor who furnishes to the Certificate
      Registrar a letter of the transferee substantially in the form of
      Exhibit I hereto.

      (d) No transfer of an ERISA-Restricted Certificate in the form of a
Definitive Certificate shall be made to any Person or shall be effective
unless the Certificate Registrar, on behalf of the Trustee, has received (A) a
certificate substantially in the form of Exhibit J hereto (or Exhibit B, in
the case of a Residual Certificate) from such transferee or (B) an Opinion of
Counsel satisfactory to the Certificate Registrar and the Securities
Administrator to the effect that the purchase and holding of such a
Certificate will not constitute or result in any nonexempt prohibited
transactions under Title I of ERISA or Section 4975 of the Code or any
Federal, state or local law ("Similar Law") materially similar to the
foregoing provisions of ERISA or the Code and will not subject the Certificate
Registrar, the Trustee, the Master Servicer, the Depositor or the Securities
Administrator to any obligation in addition to those undertaken in the



                                      64
<PAGE>

Agreement; provided, however, that the Certificate Registrar will not require
such certificate or opinion in the event that, as a result of a change of law
or otherwise, counsel satisfactory to the Certificate Registrar has rendered
an opinion to the effect that the purchase and holding of an ERISA-Restricted
Certificate by a Plan or a Person that is purchasing or holding such a
Certificate with the assets of a Plan will not constitute or result in a
prohibited transaction under Title I of ERISA or Section 4975 of the Code and
will not subject the Certificate Registrar, the Trustee, the Master Servicer,
the Depositor or the Securities Administrator to any obligation in addition to
those undertaken in this Agreement. Each Transferee of an ERISA-Restricted
Certificate that is a Book-Entry Certificate shall be deemed to have made the
appropriate representation set forth in paragraph 2 and the representation set
forth in paragraph 3 of Exhibit J. The preparation and delivery of the
certificate and opinions referred to above shall not be an expense of the
Trust Fund, the Certificate Registrar, the Trustee, the Master Servicer, the
Depositor or the Securities Administrator.

       During the period the Supplemental Interest Trust is in effect, no
transfer of a Class 1-A-1 Certificate shall be made unless the Securities
Administrator shall have received either (i) a representation from the
transferee of such Certificate acceptable to and in form and substance
satisfactory to the Securities Administrator to the effect that such
transferee is not a Plan, or (ii) a representation that the purchase and
holding of the Certificate satisfy the requirements for exemptive relief under
an Investor Based Exemption or a similar exemption, or in the case of a Plan
subject to Similar Law, will not constitute a non-exempt violation of such
Similar Law. In the event such a representation letter is not delivered, one
of the foregoing representations, as appropriate, shall be deemed to have been
made by the transferee's (including an initial acquirer's) acceptance of the
Certificate. In the event that such representation is violated, such transfer
or acquisition shall be void and of no effect.

       Notwithstanding the foregoing, no opinion or certificate shall be
required for the initial issuance of the ERISA-Restricted Certificates to the
Underwriter. The Certificate Registrar shall have no obligation to monitor
transfers of Book-Entry Certificates that are ERISA-Restricted Certificates
and shall have no liability for transfers of such Certificates in violation of
the transfer restrictions. The Certificate Registrar shall be under no
liability to any Person for any registration of transfer of any
ERISA-Restricted Certificate that is in fact not permitted by this Section
3.03(d) and neither the Securities Administrator nor the Paying Agent shall
have any liability for making any payments due on such Certificate to the
Holder thereof or taking any other action with respect to such Holder under
the provisions of this Agreement so long as the transfer was registered by the
Certificate Registrar in accordance with the foregoing requirements. The
Securities Administrator, on behalf of the Trustee, shall be entitled, but not
obligated, to recover from any Holder of any ERISA-Restricted Certificate that
was in fact a Plan or a Person acting on behalf of a Plan any payments made on
such ERISA-Restricted Certificate at and after such time. Any such payments so
recovered by the Securities Administrator, on behalf of the Trustee, shall be
paid and delivered by the Securities Administrator, on behalf of the Trustee,
to the last preceding Holder of such Certificate that is not such a Plan or
Person acting on behalf of a Plan.

      (e) As a condition of the registration of transfer or exchange of any
Certificate, the Certificate Registrar may require the certified taxpayer
identification number of the owner of the Certificate and the payment of a sum
sufficient to cover any tax or other governmental charge



                                      65
<PAGE>

imposed in connection therewith; provided, however, that the Certificate
Registrar shall have no obligation to require such payment or to determine
whether or not any such tax or charge may be applicable. No service charge
shall be made to the Certificateholder for any registration, transfer or
exchange of a Certificate.

      (f) Notwithstanding anything to the contrary contained herein, no
Residual Certificate may be owned, pledged or transferred, directly or
indirectly, by or to (i) a Disqualified Organization or (ii) an individual,
corporation or partnership or other person unless such person (A) is not a
Non-U.S. Person or (B) is a Non-U.S. Person that holds a Residual Certificate
in connection with the conduct of a trade or business within the United States
and has furnished the transferor and the Certificate Registrar with an
effective Internal Revenue Service Form W-8ECI or successor form at the time
and in the manner required by the Code (any such person who is not covered by
clause (A) or (B) above is referred to herein as a "Non-permitted Foreign
Holder").

      Prior to and as a condition of the registration of any transfer, sale or
other disposition of a Residual Certificate, the proposed transferee shall
deliver to the Certificate Registrar an affidavit in substantially the form
attached hereto as Exhibit B representing and warranting, among other things,
that such transferee is neither a Disqualified Organization, an agent or
nominee acting on behalf of a Disqualified Organization, nor a Non-permitted
Foreign Holder (any such transferee, a "Permitted Transferee"), and the
proposed transferor shall deliver to the Trustee and the Certificate Registrar
an affidavit in substantially the form attached hereto as Exhibit C. In
addition, the Trustee or the Certificate Registrar may (but shall have no
obligation to) require, prior to and as a condition of any such transfer, the
delivery by the proposed transferee of an Opinion of Counsel, addressed to the
Trustee and the Certificate Registrar, that such proposed transferee or, if
the proposed transferee is an agent or nominee, the proposed beneficial owner,
is not a Disqualified Organization, agent or nominee thereof, or a
Non-permitted Foreign Holder. Notwithstanding the registration in the
Certificate Register of any transfer, sale, or other disposition of a Residual
Certificate to a Disqualified Organization, an agent or nominee thereof, or
Non-permitted Foreign Holder, such registration shall be deemed to be of no
legal force or effect whatsoever and such Disqualified Organization, agent or
nominee thereof, or Non-permitted Foreign Holder shall not be deemed to be a
Certificateholder for any purpose hereunder, including, but not limited to,
the receipt of distributions on such Residual Certificate. The Depositor and
the Certificate Registrar shall be under no liability to any Person for any
registration or transfer of a Residual Certificate to a Disqualified
Organization, agent or nominee thereof or Non-permitted Foreign Holder or for
the Paying Agent making any payments due on such Residual Certificate to the
Holder thereof or for taking any other action with respect to such Holder
under the provisions of the Agreement, so long as the transfer was effected in
accordance with this Section 3.03(f), unless the Certificate Registrar shall
have actual knowledge at the time of such transfer or the time of such payment
or other action that the transferee is a Disqualified Organization, or an
agent or nominee thereof, or Non-permitted Foreign Holder. The Certificate
Registrar shall be entitled to recover from any Holder of a Residual
Certificate that was a Disqualified Organization, agent or nominee thereof, or
Non-permitted Foreign Holder at the time it became a Holder or any subsequent
time it became a Disqualified Organization, agent or nominee thereof, or
Non-permitted Foreign Holder, all payments made on such Residual Certificate
at and after either such times (and all costs and expenses, including but not
limited to attorneys' fees, incurred in connection therewith). Any payment
(not including any such costs



                                      66
<PAGE>

and expenses) so recovered by the Certificate Registrar shall be paid and
delivered to the last preceding Holder of such Residual Certificate.

      If any purported transferee shall become a registered Holder of a
Residual Certificate in violation of the provisions of this Section 3.03(f),
then upon receipt of written notice to the Trustee or the Certificate
Registrar that the registration of transfer of such Residual Certificate was
not in fact permitted by this Section 3.03(f), the last preceding Permitted
Transferee shall be restored to all rights as Holder thereof retroactive to
the date of such registration of transfer of such Residual Certificate. The
Depositor, the Certificate Registrar and the Trustee shall be under no
liability to any Person for any registration of transfer of a Residual
Certificate that is in fact not permitted by this Section 3.03(f), or for the
Paying Agent making any payment due on such Certificate to the registered
Holder thereof or for taking any other action with respect to such Holder
under the provisions of this Agreement so long as the transfer was registered
upon receipt of the affidavit described in the preceding paragraph of this
Section 3.03(f).

      (g) Each Holder or Certificate Owner of a Restricted Certificate,
ERISA-Restricted Certificate or Residual Certificate, or an interest therein,
by such Holder's or Owner's acceptance thereof, shall be deemed for all
purposes to have consented to the provisions of this section.

      Section 3.04. Cancellation of Certificates.

      Any Certificate surrendered for registration of transfer or exchange
shall be cancelled and retained in accordance with normal retention policies
with respect to cancelled certificates maintained by the Certificate
Registrar.

      Section 3.05. Replacement of Certificates.

      If (i) any Certificate is mutilated and is surrendered to the Trustee or
the Certificate Registrar or (ii) the Certificate Registrar receives evidence
to its satisfaction of the destruction, loss or theft of any Certificate, and
there is delivered to the Trustee and the Certificate Registrar such security
or indemnity as may be required by them to save each of them harmless, then,
in the absence of notice to the Depositor, the Trustee or the Certificate
Registrar that such destroyed, lost or stolen Certificate has been acquired by
a protected purchaser, the Securities Administrator on behalf of the Trustee
shall execute and the Authenticating Agent shall authenticate and deliver, in
exchange for or in lieu of any such mutilated, destroyed, lost or stolen
Certificate, a new Certificate of like tenor and Certificate Balance. Upon the
issuance of any new Certificate under this Section 3.05, the Trustee, the
Depositor or the Certificate Registrar may require the payment of a sum
sufficient to cover any tax or other governmental charge that may be imposed
in relation thereto and any other expenses (including the fees and expenses of
the Trustee, the Depositor or the Certificate Registrar) connected therewith.
Any replacement Certificate issued pursuant to this Section 3.05 shall
constitute complete and indefeasible evidence of ownership in the applicable
Trust Fund, as if originally issued, whether or not the lost, stolen or
destroyed Certificate shall be found at any time.

      If after the delivery of such new Certificate, a protected purchaser of
the original Certificate in lieu of which such new Certificate was issued
presents for payment such original



                                      67
<PAGE>

Certificate, the Depositor, the Certificate Registrar and the Trustee or any
agent shall be entitled to recover such new Certificate from the Person to
whom it was delivered or any Person taking therefrom, except a protected
purchaser, and shall be entitled to recover upon the security or indemnity
provided therefor to the extent of any loss, damage, cost or expenses incurred
by the Depositor, the Certificate Registrar, the Trustee or any agent in
connection therewith.

      Section 3.06. Persons Deemed Owners.

      Subject to the provisions of Section 3.09 with respect to Book-Entry
Certificates, the Depositor, the Master Servicer, the Securities
Administrator, the Trustee, the Certificate Registrar, the Paying Agent and
any agent of any of them shall treat the Person in whose name any Certificate
is registered upon the books of the Certificate Registrar as the owner of such
Certificate for the purpose of receiving distributions pursuant to Sections
5.01 and 5.02 and for all other purposes whatsoever, and neither the
Depositor, the Master Servicer, the Securities Administrator, the Trustee, the
Certificate Registrar, the Paying Agent nor any agent of any of them shall be
affected by notice to the contrary.

      Section 3.07. Temporary Certificates.

      (a) Pending the preparation of definitive Certificates, upon the order
of the Depositor, the Securities Administrator on behalf of the Trustee shall
execute and the Authenticating Agent shall authenticate and deliver temporary
Certificates that are printed, lithographed, typewritten, mimeographed or
otherwise produced, in any authorized denomination, substantially of the tenor
of the definitive Certificates in lieu of which they are issued and with such
variations as the authorized officers executing such Certificates may
determine, as evidenced by their execution of such Certificates.

      (b) If temporary Certificates are issued, the Depositor will cause
definitive Certificates to be prepared without unreasonable delay. After the
preparation of definitive Certificates, the temporary Certificates shall be
exchangeable for definitive Certificates upon surrender of the temporary
Certif


 
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