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POOLING AND SERVICING AGREEMENT

Pooling and Servicing Agreement

POOLING AND SERVICING AGREEMENT | Document Parties: DEUTSCHE BANK NATIONAL TRUST COMPANY | IndyMac Bank | INDYMAC MBS, INC You are currently viewing:
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DEUTSCHE BANK NATIONAL TRUST COMPANY | IndyMac Bank | INDYMAC MBS, INC

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Title: POOLING AND SERVICING AGREEMENT
Governing Law: Delaware     Date: 3/14/2007

POOLING AND SERVICING AGREEMENT, Parties: deutsche bank national trust company , indymac bank , indymac mbs  inc
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                                 EXHIBIT 99.1
                                 ------------

                     The Pooling and Servicing Agreement.

<PAGE>

                                                                  Execution Copy

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

                                INDYMAC MBS, INC.
                                    Depositor


                              INDYMAC BANK, F.S.B.
                               Seller and Servicer


                      DEUTSCHE BANK NATIONAL TRUST COMPANY
                                     Trustee


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

                         POOLING AND SERVICING AGREEMENT
                           Dated as of February 1, 2007
                    ----------------------------------------


                        INDYMAC INDX MORTGAGE LOAN TRUST
                                    2007-AR1


                       MORTGAGE PASS-THROUGH CERTIFICATES
                                 Series 2007-AR1


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


<PAGE>


                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                                                Page

ARTICLE ONE DEFINITIONS...........................................................................................................9
           <S>                   <C>                                                                                               <C>
           Section 1.01         Definitions........................................................................................9
           Section 1.02         Rules of Construction.............................................................................40

ARTICLE TWO CONVEYANCE OF MORTGAGE LOANS; REPRESENTATIONS AND WARRANTIES.........................................................42

            Section 2.01         Conveyance of Mortgage Loans......................................................................42
           Section 2.02         Acceptance by the Trustee of the Mortgage Loans...................................................45
            Section 2.03         Representations, Warranties, and Covenants of the Seller and the Servicer.........................47
           Section 2.04         Representations and Warranties of the Depositor as to the Mortgage Loans..........................49
           Section 2.05         Delivery of Opinion of Counsel in Connection with Substitutions...................................49
           Section 2.06         Execution and Delivery of Certificates............................................................50
           Section 2.07         REMIC Matters.....................................................................................50

ARTICLE THREE ADMINISTRATION AND SERVICING OF MORTGAGE LOANS.....................................................................51

           Section 3.01         Servicer to Service Mortgage Loans................................................................51
           Section 3.02         [Reserved]........................................................................................52
           Section 3.03         Rights of the Depositor and the Trustee in Respect of the Servicer................................52
           Section 3.04         [Reserved]........................................................................................52
           Section 3.05         Trustee to Act as Servicer........................................................................52
           Section 3.06         Collection of Mortgage Loan Payments; Certificate Account; Distribution Account...................52
           Section 3.07         Collection of Taxes, Assessments and Similar Items; Escrow Accounts...............................55
           Section 3.08         Access to Certain Documentation and Information Regarding the Mortgage Loans......................55
           Section 3.09         Permitted Withdrawals from the Certificate Account and the Distribution Account...................56
           Section 3.10         Maintenance of Hazard Insurance; Maintenance of Primary Insurance Policies........................57
           Section 3.11         Enforcement of Due-On-Sale Clauses; Assumption Agreements.........................................58
           Section 3.12         Realization Upon Defaulted Mortgage Loans.........................................................59
           Section 3.13         Trustee to Cooperate; Release of Mortgage Files...................................................61
           Section 3.14         Documents, Records and Funds in Possession of the Servicer to be Held for the Trustee.............62
           Section 3.15         Servicing Compensation............................................................................62
           Section 3.16         Access to Certain Documentation...................................................................63
           Section 3.17         Annual Statement as to Compliance.................................................................63
           Section 3.18         Errors and Omissions Insurance; Fidelity Bonds....................................................63
           Section 3.19         Notification of Adjustments.......................................................................63
           Section 3.20          Prepayment Charges................................................................................64


                                       i
<PAGE>


ARTICLE FOUR DISTRIBUTIONS AND ADVANCES BY THE SERVICER..........................................................................65

           Section 4.01         Advances..........................................................................................65
           Section 4.02         Priorities of Distribution........................................................................66
           Section 4.03         Cross-Collateralization; Adjustments to Available Funds...........................................69
           Section 4.04         [Reserved]........................................................................................70
           Section 4.05         Allocation of Realized Losses.....................................................................70
           Section 4.06         Monthly Statements to Certificateholders..........................................................71

ARTICLE FIVE THE CERTIFICATES....................................................................................................75

           Section 5.01         The Certificates..................................................................................75
           Section 5.02         Certificate Register; Registration of Transfer and Exchange of Certificates.......................75
           Section 5.03         Mutilated, Destroyed, Lost or Stolen Certificates.................................................79
           Section 5.04         Persons Deemed Owners.............................................................................79
           Section 5.05         Access to List of Certificateholders' Names and Addresses.........................................79
           Section 5.06         Maintenance of Office or Agency...................................................................80

ARTICLE SIX THE DEPOSITOR AND THE SERVICER.......................................................................................81

           Section 6.01         Respective Liabilities of the Depositor and the Servicer..........................................81
           Section 6.02         Merger or Consolidation of the Depositor or the Servicer..........................................81
           Section 6.03         Limitation on Liability of the Depositor, the Seller, the Servicer, and Others....................81
           Section 6.04         Limitation on Resignation of the Servicer.........................................................82

ARTICLE SEVEN DEFAULT............................................................................................................83

           Section 7.01         Events of Default.................................................................................83
           Section 7.02         Trustee to Act; Appointment of Successor..........................................................84
            Section 7.03         Notification to Certificateholders................................................................85

ARTICLE EIGHT CONCERNING THE TRUSTEE.............................................................................................87

           Section 8.01         Duties of the Trustee.............................................................................87
           Section 8.02         Certain Matters Affecting the Trustee.............................................................87
           Section 8.03         Trustee Not Liable for Certificates or Mortgage Loans.............................................89
           Section 8.04         Trustee May Own Certificates......................................................................89
           Section 8.05         Trustee's Fees and Expenses.......................................................................89
           Section 8.06         Eligibility Requirements for the Trustee..........................................................90
           Section 8.07         Resignation and Removal of the Trustee............................................................90
           Section 8.08         Successor Trustee.................................................................................91
           Section 8.09         Merger or Consolidation of the Trustee............................................................92
           Section 8.10         Appointment of Co-Trustee or Separate Trustee.....................................................92
           Section 8.11         Tax Matters.......................................................................................93

ARTICLE NINE TERMINATION.........................................................................................................96

           Section 9.01         Termination upon Liquidation or Purchase of the Mortgage Loans....................................96
           Section 9.02         Final Distribution on the Certificates............................................................97


                                       ii
<PAGE>


           Section 9.03         Additional Termination Requirements...............................................................98

ARTICLE TEN MISCELLANEOUS PROVISIONS.............................................................................................99

           Section 10.01        Amendment.........................................................................................99
           Section 10.02        Recordation of Agreement; Counterparts...........................................................100
           Section 10.03        Governing Law....................................................................................101
           Section 10.04        Intention of Parties.............................................................................101
           Section 10.05        Notices..........................................................................................101
           Section 10.06        Severability of Provisions.......................................................................102
           Section 10.07        Assignment.......................................................................................102
           Section 10.08        Limitation on Rights of Certificateholders.......................................................102
           Section 10.09        Inspection and Audit Rights......................................................................103
           Section 10.10        Certificates Nonassessable and Fully Paid........................................................103
           Section 10.11        Official Record..................................................................................103
           Section 10.12        Protection of Assets.............................................................................104
           Section 10.13        Qualifying Special Purpose Entity................................................................104

ARTICLE ELEVEN EXCHANGE ACT REPORTING...........................................................................................104

           Section 11.01        Filing Obligations...............................................................................104
           Section 11.02        Form 10-D Filings................................................................................104
           Section 11.03        Form 8-K Filings.................................................................................105
           Section 11.04        Form 10-K Filings................................................................................106
           Section 11.05        Sarbanes-Oxley Certification.....................................................................108
           Section 11.06        Form 15 Filing...................................................................................108
           Section 11.07        Report on Assessment of Compliance and Attestation...............................................109
           Section 11.08        Use of Subcontractors............................................................................110
           Section 11.09        Amendments.......................................................................................110


                                      iii
<PAGE>


                                    SCHEDULES

Schedule I:         Mortgage Loan Schedule....................................................................................S-I-1

Schedule II:        Representations and Warranties of the Seller/Servicer....................................................S-II-1

Schedule III:       Representations and Warranties as to the Mortgage Loans.................................................S-III-1

Schedule IV:        Reserved.................................................................................................S-IV-1

Schedule V:         Form of Monthly Report....................................................................................S-V-1


                                    EXHIBITS

Exhibit A:          Form of Senior Certificate (excluding Notional Amount Certificates).........................................A-1

Exhibit B:          Form of Subordinated Certificate............................................................................B-1

Exhibit C:          Form of Class A-R Certificate...............................................................................C-1

Exhibit D:          Form of Notional Amount Certificate.........................................................................D-1

Exhibit E           Form of Reverse of Certificates.............................................................................E-1

Exhibit F:          Form of Class P Certificates................................................................................F-1

Exhibit G-1:        Form of Initial Certification of Trustee .................................................................G-1-1

Exhibit G-2:        Form of Delay Delivery Certification......................................................................G-2-1

Exhibit H:          Form of Final Certification of Trustee......................................................................H-1

Exhibit I:          Form of Transfer Affidavit..................................................................................I-1

Exhibit J:          Form of Transferor Certificate..............................................................................J-1

Exhibit K:          Form of Investment Letter (Non-Rule 144A)...................................................................K-1

Exhibit L:          Form of Rule 144A Letter....................................................................................L-1

Exhibit M:          Form of Request for Release (for Trustee)...................................................................M-1

Exhibit N:          Request for Release of Documents............................................................................N-1

Exhibit O-1:        Form of Certification To Be Provided By The Depositor With Form 10-K........................................O-1

Exhibit O-2:        Form of Trustee's Officer's Certificate.....................................................................O-2

Exhibit P:          [Reserved]..................................................................................................P-1


                                       iv
<PAGE>


Exhibit Q:          Reporting Responsibility....................................................................................Q-1

Exhibit R:          Form of Performance Certification (Trustee).................................................................R-1

Exhibit S:          Form of Servicing Criteria To Be Addressed in Assessment
                       of Compliance Statement.................................................................................S-1

Exhibit T:          List of Item 1119 Parties...................................................................................T-1

Exhibit U:          Form of Sarbanes-Oxley Certification (Replacement of Servicer)..............................................U-1

</TABLE>


                                         v
<PAGE>


      THIS POOLING AND SERVICING AGREEMENT,   dated as of February 1, 2007, among
INDYMAC MBS,   INC., a Delaware   corporation,   as   depositor   (the   "Depositor"),
IndyMac Bank,   F.S.B.   ("IndyMac"),   a federal   savings bank, as seller (in that
capacity, the "Seller") and as servicer (in that capacity, the "Servicer"),   and
Deutsche Bank National Trust Company, a national banking association, as trustee
(the "Trustee"),

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

       In consideration of the mutual agreements set forth in this Agreement, the
parties agree as follows:

                     P R E L I M I N A R Y S T A T E M E N T

      The   Depositor   is the owner of the Trust Fund that is hereby   conveyed to
the Trustee in return for the Certificates.   As provided in this Agreement,   the
Trustee shall elect that the Trust Fund   (exclusive of any amounts in respect of
waived   Prepayment   Charges   paid by the Servicer to the Class P-1 and Class P-2
Certificates,   as applicable,   pursuant to the second paragraph of Section 3.20)
be treated   for federal   income tax   purposes   as   comprising   three real estate
mortgage investment conduits (each, a "REMIC" or, in the alternative, "REMIC 1,"
"REMIC 2" and the "Master REMIC").   Each   Certificate,   other than the Class A-R
Certificate,   will represent   ownership of one or more regular   interests in the
Master   REMIC for   purposes of the REMIC   Provisions.   The Class A-R   represents
ownership   of the sole class of residual   interest in each REMIC   created   under
this   Agreement.   The Master   REMIC will hold as assets the   several   classes of
uncertificated   REMIC 2 Interests   (other than the Class R-2 Interest).   REMIC 2
will hold as assets the   several   classes of   uncertificated   REMIC 1   Interests
(other than the Class R-1 Interest). REMIC 1 will hold as assets all property of
the Trust Fund.   Each REMIC 2 Interest   (other than the Class R-2   Interest)   is
hereby designated as a regular interest in REMIC 2. Each REMIC 1 Interest (other
than the Class R-1 Interest) is hereby designated as a regular interest in REMIC
1. The latest possible   maturity date of all REMIC regular   interests created in
this   Agreement   shall be the Latest   Possible   Maturity   Date.   All   amounts in
respect of waived   Prepayment   Charges paid by the Servicer to the Class P-1 and
Class P-2 Certificates   pursuant to the second paragraph of Section 3.20 will be
treated   as paid   directly   by the   Servicer   to the   Class   P-1 and   Class   P-2
Certificates   and   not as   paid by or   through   any   REMIC   created   under   this
Agreement.

REMIC 1

      The REMIC 1 Regular   Interests   will have the initial   principal   balance,
Pass-Through   Rates and corresponding   Loan Groups as set forth in the following
table:

<TABLE>
<CAPTION>

                                                       Initial Principal                   
                                                       Balance or             Pass-Through      Corresponding
REMIC 1 Interests                                        Notional Amount        Rate              Loan Group
-----------------                                       ------                 ----              ----------
<S>                                                      <C>                   <C>                <C>
A-1   (0.9% of the Assumed Balance of Loan Group 1)      (1)                    (2)               1
B-1   (0.1% of the Assumed Balance of Loan Group 1)      (1)                    (2)               1
C-1   (Excess of Loan Group 1)                            (1)                    (2)               1
A-2   (0.9% of the Assumed Balance of Loan Group 2)      (1)                    (2)               2
B-2   (0.1% of the Assumed Balance of Loan Group 2)      (1)                    (2)               2
C-2   (Excess of Loan Group 2)                           (1)                    (2)               2


                                       1
<PAGE>


A-3   (0.9% of the Assumed Balance of Loan Group 3)      (1)                    (2)               3
B-3   (0.1% of the Assumed Balance of Loan Group 3)      (1)                    (2)               3
C-3   (Excess of Loan Group 3)..                         (1)                    (2)               3
1-P-1                                                   $100                   (3)               N/A
1-P-2                                                   $100                   (3)               N/A
1-$100                                                  $100                   (4)               N/A
R-1                                                     (5)                    (5)               N/A

</TABLE>

---------------
(1) Each Class A Interest will have a principal balance initially equal to 0.9%
of the Assumed Balance of its corresponding Loan Group. Each Class B Interest
will have a principal balance initially equal to 0.1% of the the Assumed Balance
of its corresponding Loan Group. The initial principal balance of each Class C
Interest will equal the excess of the initial aggregate principal balance of its
corresponding Loan Group over the initial aggregate principal balances of the
Class A and Class B Interests (and of the Class 1-$100 Interest, in the case of
the Class C-1 Interest) corresponding to such Loan Group.

(2) The Weighted Average Adjusted Net Mortgage Rate of the corresponding Loan
Group.

(3) The Class 1-P-1 and Class 1-P-2 Interests will not bear interest. The Class
1-P-1 Interests will be entitled to 100% of any Hard Prepayment Charges paid on
the Mortgage Loans. The Class 1-P-2 Interests will be entitled to 100% of any
Soft Prepayment Charges paid on the Mortgage Loans.

(4) The Weighted Average Adjusted Net Mortgage Rate of Loan Group 1.

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

      On each   Distribution   Date, the Available Funds shall be distributed with
respect to the REMIC 1 Interests in the following manner:

(1) Interest is to be distributed with respect to each REMIC 1 Interest
according to the formulas described above;

(2)   Principal   Amounts and Realized   Losses will be allocated to make the Class
1-P and Class 1-$100 balance equal to the principal   balances of the Class P and
Class A-R Certificates, respectively, for such Distribution Date.

(3) If Cross-Over Situation does not exist with respect to any Class of
Interests, then Principal Amounts and Realized Losses arising with respect to
each Loan Group will be allocated: first to cause the Loan Group's corresponding
Class A and Class B to equal, respectively, 0.9% of the Assumed Balance and 0.1%
of the Assumed Balance; and second to the Loan Group's corresponding Class C
Interest;

(4) If a Cross-Over Situation exists with respect to the Class A and Class B
Interests then:

      (a) if the   Calculation   Rate in   respect of the   outstanding   Class A and
      Class   B   Interests   is   less   than   the   Subordinate   Pass-Through   Rate,
      Principal    Relocation   Payments   will   be   made   proportionately   to   the
      outstanding   Class   A   Interests   prior   to   any   other   distributions   of
      principal from each such Loan Group; and


                                       2
<PAGE>


           (b) if the Calculation Rate in respect of the outstanding Class A and
           Class B Interests is greater than the Subordinate Pass-Through Rate,
           Principal Relocation Payments will be made proportionately to the
           outstanding Class B Interests prior to any other distributions of
           principal from each such Loan Group.

In case of either (a) or (b), Principal Relocation Payments will be made so as
to cause the Calculation Rate in respect of the outstanding Class A and Class B
Interests to equal the Subordinate Pass-Through Rate. With respect to each Loan
Group, if (and to the extent that) the sum of (a) the principal payments
comprising the Principal Amount received during the Due Period and (b) the
Realized Losses on the Mortgage Loans in that Loan Group, are insufficient to
make the necessary reductions of principal on the Class A and Class B Interests,
then interest will be added to the Loan Group's other REMIC 1 Interests that are
not receiving Principal Relocation Payments, in proportion to their principal
balances.

           (c) Unless otherwise required to achieve the Calculation Rate, the
            outstanding aggregate Class A and Class B Interests for all Loan
           Groups will not be reduced below 1% of the excess of (i) the
           aggregate Stated Principal Balances of the Mortgage Loans as of the
           end of any Due Period (reduced by any Principal Prepayments received
           after the Due Period that are to be distributed on the Distribution
           Date related to the Due Period)over (ii) the Certificate Balance of
           the Senior Certificates (excluding the Class A-R Certificates) for
           all Certificate Groups as of the related Distribution Date (after
           taking into account distributions of principal on such Distribution
           Date).

If (and to the extent that) the limitation in paragraph (c) prevents the
distribution of principal to the Class A and Class B Interests of a Loan Group,
and if the Loan Group's Class C Interest has already been reduced to zero, then
the excess principal from that Loan Group will be paid to the Class C Interests
of the other Loan Group, the aggregate Class A and Class B Interests of which
are less than 1% of the Assumed Balance. If the Mortgage Loans in the Loan Group
of the Class C Interest that receives such payment has a Weighted Average
Adjusted Net Mortgage Rate below the Weighted Average Adjusted Net Mortgage Rate
of the Loan Group making the payment, then the payment will be treated by the
REMIC 1 as a Realized Loss. Conversely, if the Loan Group of the Class C
Interest that receives such payment has a Weighted Average Adjusted Net Mortgage
Rate above the Weighted Average Adjusted Net Mortgage Rate of the Loan Group
making the payment, then the payment will be treated by the REMIC 1 as a
reimbursement for prior Realized Losses.

REMIC 2

           The REMIC 2 Regular Interests will have the initial principal
balance, Pass-Through Rates and corresponding Loan Groups as set forth in the
following table:

                       Initial Principal    Pass-Through    Corresponding Class of
  REMIC 2 Interests     Balance                  Rate             Certificates
  -----------------     -------                  -----            ------------
      Class 2-1-A-1     (1)                  Variable(2)        Class 1-A-1, 1-A-X
      Class 2-1-A-2     (1)                  Variable(2)           Class 1-A-2
      Class 2-2-A-1     (1)                  Variable(3)           Class 2-A-1
      Class 2-2-A-2     (1)                  Variable(3)           Class 2-A-2
      Class 2-3-A-1     (1)                  Variable(4)           Class 3-A-1
       Class 2-3-A-2     (1)                  Variable(4)           Class 3-A-2
      Class 2-$100      (1)                      (2)                Class A-R
       Class 2-B-1      (1)                  Variable(5)            Class B-1
       Class 2-B-2      (1)                   Variable(5)            Class B-2
       Class 2-B-3      (1)                  Variable(5)            Class B-3
       Class 2-B-4      (1)                  Variable(5)            Class B-4


                                       3
<PAGE>


       Class 2-B-5      (1)                  Variable(5)            Class B-5
       Class 2-B-6      (1)                  Variable(5)            Class B-6
     Class 2-P-1        $100                       (6)             Class P-1
     Class 2-P-2        $100                        (6)             Class P-2
      Class R-2         (7)                        (7)                N/A

(1) On each Distribution Date, Realized Losses and payments of principal will be
  allocated to each REMIC 2 Regular Interest in the same amounts as they are
  allocated to their Corresponding Class of Certificates (other than any Class
  of Notional Amount Certificates, if applicable).

(2) These Interests will bear interest during each Interest Accrual Period for
  any Distribution Date at a per annum rate equal to the Weighted Average
  Adjusted Net Mortgage Rate of the Group 1 Mortgage Loans as of that
  Distribution Date.

(3) These Interests will bear interest during each Interest Accrual Period for
  any Distribution Date at a per annum rate equal the Weighted Average Adjusted
  Net Mortgage Rate of the Group 2 Mortgage Loans as of that Distribution Date.

(4) These Interests will bear interest during each Interest Accrual Period for
  any Distribution Date at a per annum rate equal the Weighted Average Adjusted
  Net Mortgage Rate of the Group 3 Mortgage Loans as of that Distribution Date.

(5) The Pass-Through Rate for each such Class for each Interest Accrual Period
  for any Distribution Date will be a per annum rate equal to the Calculation
  Rate.

(6) The Class 2-P-1 and Class 2-P-2 Interests will not bear interest. The Class
  2-P-1 Interests will be entitled to 100% of any Prepayment Charges paid on the
  Class P-1 Certificates. The Class 2-P-2 Interests will be entitled to 100% of
  any Prepayment Charges paid on the Class P-2 Certificates.

(7) The Class R-2 Interest is the sole class of residual interest in REMIC 2. It
  has no principal balance and pays no principal or interest.


                                The Master REMIC

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

<TABLE>
<CAPTION>

  =========================== ============================ ===================== ======================= ==========================
                               Initial Class Certificate        Pass-Through                                  Integral Multiples in
      Class Designation                  Balance                     Rate            Minimum Denomination         Excess of Minimum
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
      <S>                        <C>                          <C>                     <C>                             <C>
           Class 1-A-1            $         300,000,000          Variable(1)            $        25,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
           Class 1-A-2            $          14,142,000          Variable(2)             $        25,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
           Class 1-A-X                     (3)                 Variable (4)             $        25,000 (5)             $1,000 (5)
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
           Class 2-A-1            $         177,507,000          Variable(6)             $        25,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
           Class 2-A-2            $          16,780,000          Variable(6)             $        25,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
           Class 3-A-1            $         136,767,000          Variable(7)            $        25,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
           Class 3-A-2            $          12,929,000          Variable(7)            $         25,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
            Class A-R             $                 100              (2)                $            100                   N/A
  =========================== ============================ ===================== ======================= ==========================



                                       4
<PAGE>


  =========================== ============================ ===================== ======================= ==========================
            Class B-1            $           20,734,000          Variable(8)            $        25,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
            Class B-2             $          13,584,000          Variable(8)            $        25,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
            Class B-3             $           8,222,000          Variable(8)            $        25,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
            Class B-4             $           6,077,000          Variable(8)            $       100,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
            Class B-5             $           5,005,000          Variable(8)            $       100,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
            Class B-6             $           3,217,786          Variable(8)            $       100,000                 $1,000
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
            Class P-1             $                 100.00         0%(9)                $           100                    N/A
  --------------------------- ---------------------------- --------------------- ----------------------- --------------------------
            Class P-2             $                 100.00         0%(10)               $           100                    N/A
  =========================== ============================ ===================== ======================= ==========================

</TABLE>

(1) The Pass-Through Rate for the Class 1-A-1 Certificates for the Interest
  Accrual Period related to any Distribution Date (A) up to and including the
  Distribution Date in January 2012 will equal the lesser of (x) 6.13048% per
  annum and (y) the Weighted Average Net Mortgage Rate of the Group 1 Mortgage
  Loans and (B) any Distribution Date thereafter ,will be a per annum rate equal
  to the Weighted Average Net Mortgage Rate of the Group 1 Mortgage Loans. The
  Pass-Through Rate for the Class 1-A-1 Certificates for the Interest Accrual
  Period related to the first Distribution Date is 6.13048% per annum.

(2) The Pass-Through Rate for the Class 1-A-2 and Class A-R Certificates for the
  Interest Accrual Period related to each Distribution Date will equal the
  Weighted Average Net Mortgage Rate of the Group 1 Mortgage Loans. The
  Pass-Through Rate for the Class 1-A-2 and Class A-R Certificates for the
  Interest Accrual Period related to the first Distribution Date is 6.22546% per
  annum.

(3) The Class 1-A-X Certificates will be Notional Amount Certificates, will have
  no Class Certificate Balance, will pay no principal and will be entitled to
  distributions of interest on its Notional Amount (initially $300,000,000)

(4) The Pass-Through Rate for the Class 1-A-X Certificates for the Interest
  Accrual Period related to any Distribution Date (x) up to and including the
  Distribution Date in January 2012, will be the Weighted Average Net Mortgage
  Rate of the Group 1 Mortgage Loans minus the Pass-Through Rate for the Class
  1-A-1 Certificates, but not less than 0.00%, and (y) any Distribution Date
  thereafter, will be 0.00%. The Pass-Through Rate for the Class 1-A-X
  Certificates for the Interest Accrual Period related to the first Distribution
  Date is 0.09498% per annum.

(5) Minimum denomination is based on the Notional Amount of the Class.

(6) The Pass-Through Rate for the Class 2-A-1 and Class 2-A-2 Certificates for
  the Interest Accrual Period related to each Distribution Date will equal the
  Weighted Average Net Mortgage Rate of the Group 2 Mortgage Loans. The
  Pass-Through Rate for the Class 2-A-1 and Class 2-A-2 Certificates for the
  Interest Accrual Period related to the first Distribution Date is 5.72705% per
  annum.

(7) The Pass-Through Rate for the Class 3-A-1 and Class 3-A-2 Certificates for
  the Interest Accrual Period related to each Distribution Date will equal the
  Weighted Average Net Mortgage Rate of the Group 3 Mortgage Loans. The
  Pass-Through Rate for the Class 3-A-1 and Class 3-A-2 Certificates for the
  Interest Accrual Period related to the first Distribution Date is 6.00694% per
  annum.

(8) The Pass-Through Rate for each Class of Subordinated Certificates for each
  Interest Accrual Period for any Distribution Date will be a per annum rate
  equal to the Subordinate Pass-Through Rate. The Pass-Through Rate for the
  Subordinated Certificates for the Interest Accrual Period related to the first
  Distribution Date is 6.02862% per annum. For federal income tax purposes, the
  Pass-Through Rate for each Class of Subordinated Certificates will be the
  Calculation Rate.


                                       5
<PAGE>


(9) The Class P-1 Certificates will not be entitled to any interest, but will be
  entitled to 100% of any Hard Prepayment Charges collected on the Mortgage
  Loans. All amounts in respect of waived Hard Prepayment Charges paid by the
  Servicer to the Class P-1 Certificates pursuant to the second paragraph of
  Section 3.20 will be treated as paid directly by the Servicer to the Class P-1
  Certificates and not as paid by or through any REMIC created under this
  Agreement.

(10) The Class P-2 Certificates will not be entitled to any interest, but will
  be entitled to 100% of any Soft Prepayment Charges paid on the Mortgage Loans.
  All amounts in respect of waived Soft Prepayment Charges paid by the Servicer
  to the Class P-2 Certificates pursuant to the second paragraph of Section 3.20
  will be treated as paid directly by the Servicer to the Class P-2 Certificates
  and not as paid by or through any REMIC created under this Agreement.

      The   foregoing   REMIC   structure is intended to cause all of the cash from
the   Mortgage   Loans to flow through to the Master REMIC as cash flow on a REMIC
regular   interest,   without creating any   shortfall--actual   or potential (other
than for credit losses) to any REMIC regular interest.

      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 REMIC 1 and 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.

Set forth below are designations of Classes of Certificates to the categories
used in this Agreement:

<TABLE>
<CAPTION>

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

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

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

Class P Certificates...............................................      Class P-1 and Class P-2 Certificates.

COFI Certificates..................................................      None.

Components.........................................................      None.

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

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

ERISA-Restricted Certificates,.....................................      The Residual Certificates and the Private Certificates;    
                                                                        the Retained Certificates until they have been the         
                                                                        subject of an ERISA-Qualifying Underwriting; and           
                                                                        Certificates that cease to have a rating of BBB- (or       
                                                                        its equivalent), or better, from at least one Rating       
                                                                        Agency.                                                     


                           6
<PAGE>


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


Group 1 Certificates...............................................      Group 1 Senior Certificates and the portion of the
                                                                         Subordinated Certificates related to Loan Group 1.

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


Group 2 Certificates...............................................      Group 2 Senior Certificates and the portion of the
                                                                        Subordinated Certificates related to Loan Group 2.

Group 3 Senior Certificates........................................      Class 3-A-1 and Class 3-A-2 Certificates.


Group 3 Certificates...............................................      Group 3 Senior Certificates and the portion of the
                                                                         Subordinated Certificates related to Loan Group 3.

LIBOR Certificates.................................................      None.

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

Notional Amount Certificates.......................................      Class 1-A-X Certificates.

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

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

Physical Certificates..............................................      Class A-R Certificates and the Private Certificates.

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

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

Private Certificates...............................................      Class P-1, Class P-2, Class B-4, Class B-5 and Class B-6
                                                                        Certificates.

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

Regular Certificates...............................................      All Classes of Certificates other than the Class A-R
                                                                        Certificates.

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

Retained Certificates..............................................      None.


                           7
<PAGE>


Senior Certificates................................................      Class 1-A-1, Class 1-A-2, Class 1-A-X, Class 2-A-1, Class
                                                                         2-A-2, Class 3-A-1, Class 3-A-2 and Class A-R Certificates.

Senior Certificate Group...........................................      The Group 1 Senior Certificates, the Group 2 Senior
                                                                         Certificates and the Group 3 Senior Certificates, as
                                                                        applicable.

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

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

Targeted Principal Component.......................................      None.

</TABLE>

      With respect to any of the foregoing designations as to which the
corresponding reference is "None," all defined terms and provisions in this
Agreement relating solely to such designations shall be of no force or effect,
and any calculations in this Agreement incorporating references to such
designations shall be interpreted without reference to such designations and
amounts. Defined terms and provisions in this Agreement relating to statistical
rating agencies not designated above as Rating Agencies shall be of no force or
effect.


                                       8
<PAGE>


                                   ARTICLE ONE

                                   DEFINITIONS

       Section 1.01 Definitions.

      Unless the context requires a different meaning, capitalized terms are
used in this Agreement as defined below.

      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 Termination Date: Not applicable.

      Additional Designated Information: As defined in Section 11.02.

       Adjusted Mortgage Rate: As to each Mortgage Loan and at any time, the per
annum rate equal to the Mortgage Rate less the Servicing Fee Rate.

      Adjusted Net Mortgage Rate: As to each Mortgage Loan and any Distribution
Date, the per annum rate equal to the Mortgage Rate of that Mortgage Loan (as of
the Due Date in the month preceding the month in which such Distribution Date
occurs) less the Expense Fee Rate for that Mortgage Loan.

      Adjustment Date: A date specified in each Mortgage Note as a date on which
the Mortgage Rate on the related Mortgage Loan is subject to adjustment.

      Advance: As to a Loan Group, the payment required to be made by the
Servicer with respect to any Distribution Date pursuant to Section 4.01, the
amount of any such payment being equal to the aggregate of payments of principal
and interest (net of the Servicing Fee) on the Mortgage Loans in such Loan Group
that were due during the related Due Period and not received as of the close of
business on the related Determination Date, together with an amount equivalent
to interest on each REO Property, net of any net income from such REO Property,
less the aggregate amount of any such delinquent payments that the Servicer has
determined would constitute a Nonrecoverable Advance if advanced.

      Advance Notice: As defined in Section 4.01(b).

      Advance Deficiency: As defined in Section 4.01(b).

      Affiliate: With respect to any Person, any other Person controlling,
controlled or under common control with such Person. For purposes of this
definition, "control" means the power to direct the management and policies of a
Person, directly or indirectly, whether through ownership of voting securities,
by contract, or otherwise and "controlling" and "controlled" shall have meanings
correlative to the foregoing. Affiliates also include any entities consolidated
with the requirements of generally accepted accounting principles.

      Aggregate Subordinated Percentage: With respect to any Distribution Date,
the fraction, expressed as a percentage, the numerator of which is equal to the
aggregate Class Certificate Balance of


                                       9
<PAGE>


the Subordinated Certificates immediately prior to such Distribution Date and
the denominator of which is the aggregate Stated Principal Balance of all the
Mortgage Loans as of the Due Date in the month preceding the month of such
Distribution Date (after giving effect to Principal Prepayments received in the
Prepayment Period related to that prior Due Date).

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

      Allocable Share: As to any Distribution Date and Class of Certificates,
the ratio that the amount calculated with respect to such Distribution Date (A)
with respect to the Senior Certificates of the related Senior Certificate Group,
pursuant to clause (i) of the definition of Class Optimal Interest Distribution
Amount (without giving effect to any reduction of such amount pursuant to
Section 4.02 (d)) and (B) with respect to the Subordinated Certificates,
pursuant to the definition of Assumed Interest Amount or after the second Senior
Termination Date pursuant to clause (i) of the definition of Class Optimal
Interest Distribution Amount (without giving effect to any reduction of such
amount pursuant to Section 4.02(d)) bears to the amount calculated with respect
to such Distribution Date for each Class of Certificates pursuant to clause (i)
of the definition of Class Optimal Interest Distribution Amount (without giving
effect to any reduction of such amount pursuant to Section 4.02(d)) or the
definition of Assumed Interest Amount for such Loan Group and Class, as
applicable.

      Amount Available for Senior Principal: As to any Distribution Date and
Loan Group, the related Available Funds for such Distribution Date, reduced by
the aggregate amount distributable (or allocable to the Accrual Amount, if
applicable) on such Distribution Date in respect of interest on the related
Senior Certificates pursuant to Section 4.02(a)(1)(i), Section 4.02(a)(2)(i) and
Section 4.02(a)(3)(i).

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

      Applicable Credit Support Percentage: As defined in Section 4.02(e).

      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 Refinance 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; (ii) with respect to a Refinance Loan,
the value of the Mortgaged Property based upon the appraisal made at the time of
the origination of such Refinance Loan.

      Assumed Balance: With respect to any Distribution Date, Class of
Subordinated Certificates and Loan Group, a pro rata amount for each such Class
(based on their respective Class Certificate Balances) in such Loan Group equal
to the product of the Subordinated Percentage for such Loan Group as of such
Distribution Date and the aggregate Stated Principal Balance of each Mortgage
Loan in such Loan Group as of the Due Date occurring in the month preceding the
month of such Distribution Date (after giving effect to Principal Prepayments
received in the Prepayment Period related to such prior Due Date).

      Assumed Interest Amount: With respect to any Distribution Date, any Class
of Subordinated Certificates and any Loan Group, one month's interest accrued
during the related Interest Accrual Period at the Pass-Through Rate on the
related Assumed Balance immediately prior to that Distribution Date.


                                       10
<PAGE>


      Available Funds: As to any Distribution Date and the Mortgage Loans in a
Loan Group, the sum of (a) the aggregate amount held in the Certificate Account
at the close of business on the related Determination Date, including any
Subsequent Recoveries with respect to the Mortgage Loans in that Loan Group, net
of the Amount Held for Future Distribution, net of Prepayment Charges and net of
amounts permitted to be withdrawn from the Certificate Account pursuant to
clauses (i) - (viii), inclusive, of Section 3.09(a) and amounts permitted to be
withdrawn from the Distribution Account pursuant to clauses (i) - (iii),
inclusive, of Section 3.09(b), (b) the amount of the related Advance, (c) in
connection with Defective Mortgage Loans in such Loan Group, as applicable, the
aggregate of the Purchase Prices and Substitution Adjustment Amounts deposited
on the related Distribution Account Deposit Date, and (d) any amount deposited
on the related Distribution Account Deposit Date pursuant to Section 3.10. The
Holders of the Class P Certificates will be entitled to all Prepayment Charges
received on the Mortgage Loans and such amounts will not be available for
distribution to the Holders of any other Class of Certificates.

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

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

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

      Bankruptcy Loss Coverage Amount: As of any date of determination, the
Bankruptcy Loss Coverage Amount shall equal the Initial Bankruptcy Loss Coverage
Amount as reduced by (i) the aggregate amount of Bankruptcy Losses allocated to
the Certificates since the Cut-off Date and (ii) any permissible reductions in
the Bankruptcy Loss Coverage Amount as evidenced by a letter of each Rating
Agency to the Trustee to the effect that any such reduction will not result in a
downgrading, qualification or withdrawal of the then current ratings assigned to
the Classes of Certificates rated by it.

      Blanket Mortgage: The mortgage or mortgages encumbering a Cooperative
Property.

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

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

      Calculation Rate: For each Distribution Date, the product of (i) 10 and
(ii) the weighted average pass-through rate of the outstanding Class A and Class
B Interests, treating each of the Class A Interests as having an Interest Rate
of 0.00%.

      Cap Counterparty: Not applicable.

      Certificate: Any one of the certificates issued by the Trust Fund and
executed by the Trustee in substantially the forms attached as exhibits.


                                       11
<PAGE>


      Certificate Account: The separate Eligible Account or Accounts created and
maintained by the Servicer pursuant to Section 3.06(d) with a depository
institution in the name of the Servicer for the benefit of the Trustee on behalf
of Certificateholders and designated "IndyMac Bank, F.S.B., in trust for the
registered holders of IndyMac INDX Mortgage Loan Trust 2007-AR1, Mortgage
Pass-Through Certificates, Series 2007-AR1."

      Certificate Balance: With respect to any Certificate (other than a
Notional Amount Certificate) at any date of determination, the maximum dollar
amount of principal to which the Holder thereof is then entitled under this
Agreement, such amount being equal to the Denomination thereof (A) plus any
increase in the Certificate Balance of such Certificate pursuant to Section 4.02
due to the receipt of Subsequent Recoveries on the Mortgage Loans in a Loan
Group, (B) minus the sum of (i) all distributions of principal previously made
with respect thereto and (ii) all Realized Losses allocated to that Certificate
and, in the case of any Subordinated Certificates, all other reductions in
Certificate Balance previously allocated to that Certificate pursuant to Section
4.05 and (C) in the case of any Class of Accrual Certificates, plus the Accrual
Amount added to the Class Certificate Balance of such Class prior to such date.
The Notional Amount Certificates have no Certificate Balances.

      Certificate Group: Any of the Group 1, Group 2 and Group 3, as the context
requires.

      Certificate Owner: With respect to a Book-Entry Certificate, the Person
who is the beneficial owner of the Book-Entry Certificate. For the purposes of
this Agreement, in order for a Certificate Owner to enforce any of its rights
under this Agreement, it shall first have to provide evidence of its beneficial
ownership interest in a Certificate that is reasonably satisfactory to the
Trustee, the Depositor and/or the Servicer, as applicable.

      Certificate Register: The register maintained pursuant to Section 5.02.

      Certificate Registrar: Deutsche Bank National Trust Company and its
successors and, if a successor certificate registrar is appointed under this
Agreement, the successor.

      Certificateholder or Holder: The person in whose name a Certificate is
registered in the Certificate Register, except that, solely for the purpose of
giving any consent pursuant to this Agreement, any Certificate registered in the
name of the Depositor or any affiliate of the Depositor is not Outstanding and
the Percentage Interest evidenced thereby shall not be taken into account in
determining whether the requisite amount of Percentage Interests necessary to
effect a consent has been obtained, except that if the Depositor or its
affiliates own 100% of the Percentage Interests evidenced by a Class of
Certificates, the Certificates shall be Outstanding for purposes of any
provision of this Agreement requiring the consent of the Holders of Certificates
of a particular Class as a condition to the taking of any action. The Trustee is
entitled to rely conclusively on a certification of the Depositor or any
affiliate of the Depositor in determining which Certificates are registered in
the name of an affiliate of the Depositor.

      Certification Party: As defined in Section 11.05.

      Certifying Person: As defined in Section 11.05.

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

      Class A Interest: Each of the Class A-1, Class A-2 and Class A-3
Interests.

      Class B Interest: Each of the Class B-1, Class B-2 and Class B-3
Interests.


                                       12
<PAGE>


      Class C Interest: Each of the Class C-1, Class C-2 and Class C-3
Interests.

      Class Certificate Balance: For any Class as of any date of determination,
the aggregate of the Certificate Balances of all Certificates of the Class as of
that date.

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

      Class Optimal Interest Distribution Amount: With respect to any
Distribution Date and interest-bearing Class, the sum of (i) one month's
interest accrued during the related Interest Accrual Period at the Pass-Through
Rate for such Class on the related Class Certificate Balance immediately prior
to such Distribution Date, subject to reduction pursuant to Section 4.02(d), and
(ii) any Class Unpaid Interest Amounts for such Class.

      Class Subordination Percentage: With respect to any Distribution Date and
each Class of Subordinated Certificates, the fraction (expressed as a
percentage) the numerator of which is the Class Certificate Balance of such
Class of Subordinated Certificates immediately prior to such Distribution Date
and the denominator of which is the aggregate Class Certificate Balance of all
Classes of Certificates immediately prior to such Distribution Date.

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

      Closing Date: February 27, 2007.

      CMT Index: Not applicable.

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

      COFI: Not applicable.

      COFI Certificates: Not applicable.

      Commission: The United States Securities and Exchange Commission.

      Compensating Interest: For any Distribution Date, 0.125% multiplied by
one-twelfth multiplied by the aggregate Stated Principal Balance of the Mortgage
Loans as of the first day of the prior month.

      Components: Not applicable.

      Co-op Shares: Shares issued by a Cooperative Corporation.

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

      Cooperative Loan: Any Mortgage Loan secured by Co-op Shares and a
Proprietary Lease.


                                       13
<PAGE>

      Cooperative Property: The real property and improvements owned by the
Cooperative Corporation, including the allocation of individual dwelling units
to the holders of the Co-op Shares of the Cooperative Corporation.

      Cooperative Unit: A single family dwelling located in a Cooperative
Property.

      Corporate Trust Office: The designated office of the Trustee in the State
of California at which at any particular time its corporate trust business with
respect to this Agreement is administered, which office at the date of the
execution of this Agreement is located at 1761 East St. Andrew Place, Santa Ana,
California 92705, Attn: Trust Administration- IN07A1 (IndyMac MBS, Inc., IndyMac
INDX Mortgage Loan Trust 2007-AR1, Mortgage Pass-Through Certificates, Series
2007-AR1), and which is the address to which notices to and correspondence with
the Trustee should be directed. The office of the Certificate Registrar for
purposes of presentment of certificates for registration of transfer, exchange
or final payment is located at DB Services Tennessee, 648 Grassmere Park Road,
Nashville, Tennessee 37211-3658, Attention: Transfer Unit.

      Cross-over Situation: For any Distribution Date and for any Loan Group
(after taking into account principal distributions on such Distribution Date) a
Cross-Over Situation exists with respect to the Class A and Class B Interests of
the Loan Group if such Interests in the aggregate are less than 1% of the
Assumed Balance of the related Loan Group.

      Cut-off Date: February 1, 2007.

      Cut-off Date Pool Principal Balance: $ 714,964,886.25.

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

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

      Defective Mortgage Loan: Any Mortgage Loan that is required to be
repurchased pursuant to Section 2.02 or 2.03.

      Deficient Valuation: For any Mortgage Loan, a valuation by a court of
competent jurisdiction of the Mortgaged Property in an amount less than the then
outstanding indebtedness under the Mortgage Loan, or any reduction in the amount
of principal to be paid in connection with any Scheduled Payment that results in
a permanent forgiveness of principal, which valuation or reduction results from
an order of the court that is final and non-appealable in a proceeding under the
Bankruptcy Code.

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

      Delay Certificates: As specified in the Preliminary Statement.

      Delay Delivery Certification: A certification substantially in the form of
Exhibit G-2.

      Delay Delivery Mortgage Loans: The Mortgage Loans identified on the
Mortgage Loan Schedule for which none of a related Mortgage File, or neither the
Mortgage Note, nor a lost note


                                       14
<PAGE>


affidavit for a lost Mortgage Note, has been delivered to the Trustee by the
Closing Date. The Depositor shall deliver the Mortgage Files to the Trustee:

      (A) for at least 70% of the Mortgage Loans in each Loan Group, not later
than the Closing Date, and

      (B) for the remaining 30% of the Mortgage Loans in each Loan Group, not
later than five Business Days following the Closing Date.

      To the extent that the Seller is in possession of any Mortgage File for
any Delay Delivery Mortgage Loan, until delivery of the Mortgage File to the
Trustee as provided in Section 2.01, the Seller shall hold the files as
Servicer, as agent and in trust for the Trustee.

      Deleted Mortgage Loan: As defined in Section 2.03(c).

      Delinquent: A Mortgage Loan is "Delinquent" if any monthly payment due on
a Due Date is not made by the close of business on the next scheduled Due Date
for such Mortgage Loan. A Mortgage Loan is "30 days Delinquent" if such monthly
payment has not been received by the close of business on the corresponding day
of the month immediately succeeding the month in which such monthly payment was
due. The determination of whether a Mortgage Loan is "60 days Delinquent", "90
days Delinquent", etc. shall be made in a like manner.

      Denomination: For each Certificate, the amount on the face of the
Certificate as the "Initial Certificate Balance of this Certificate" or the
"Initial Notional Amount of this Certificate" or, if neither of the foregoing,
the Percentage Interest appearing on the face of the Certificate.

      Depositor: IndyMac MBS, Inc., a Delaware corporation, or its successor in
interest.

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

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

      Determination Date: As to any Distribution Date, the 18th day of each
month or if that day is not a Business Day the next Business Day, except that if
the next Business Day is less than two Business Days before the related
Distribution Date, then the Determination Date shall be the Business Day
preceding the 18th day of the month.

      Distribution Account: The separate Eligible Account created and maintained
by the Trustee pursuant to Section 3.06(e) in the name of the Trustee for the
benefit of the Certificateholders and designated "Deutsche Bank National Trust
Company in trust for registered holders of IndyMac INDX Mortgage Loan Trust
2007-AR1, Mortgage Pass-Through Certificates, Series 2007-AR1." Funds in the
Distribution Account shall be held in trust for the Certificateholders for the
uses and purposes set forth in this Agreement.

      Distribution Account Deposit Date: As to any Distribution Date, 12:30 P.M.
Pacific time on the Business Day preceding the Distribution Date.


                                       15
<PAGE>


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

      Due Date: For any Mortgage Loan and Distribution Date, the first day of
the month in which such Distribution Date occurs.

      Due Period: For any Distribution Date, the period commencing on the second
day of the month preceding the month in which the Distribution Date occurs and
ending on the first day of the month in which the 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
Moody's or Fitch and one of the two highest short-term ratings of S&P, if S&P is
a Rating Agency at the time any amounts are held on deposit therein, or

      (ii) an account or accounts in a depository institution or trust company
in which such accounts are insured by the FDIC (to the limits established by the
FDIC) and the uninsured deposits in which accounts are otherwise secured such
that, as evidenced by an Opinion of Counsel delivered to the Trustee and to each
Rating Agency, the Certificateholders have a claim with respect to the funds in
such account or a perfected first priority security interest against any
collateral (which shall be limited to Permitted Investments) securing such funds
that is superior to claims of any other depositors or creditors of the
depository institution or trust company in which such account is maintained, or

      (iii) a trust account or accounts maintained with (a) the trust department
of a federal or state chartered depository institution or (b) a trust company,
acting in its fiduciary capacity, or

      (iv) any other account acceptable to each Rating Agency.

Eligible Accounts may bear interest, and may include, if otherwise qualified
under this definition, accounts maintained with the Trustee.

      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 the
Underwriter's Exemption.

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

      Escrow Account: The Eligible Account or Accounts established and
maintained pursuant to Section 3.07(a).

      Event of Default: As defined in Section 7.01.

      Excess Loss: The amount of any (i) Fraud Loss on the Mortgage Loans
realized after the Fraud Loss Coverage Termination Date, (ii) Special Hazard
Loss on the Mortgage Loans realized after the


                                        16
<PAGE>


Special Hazard Coverage Termination Date or (iii) Bankruptcy Loss on the
Mortgage Loans realized after the Bankruptcy Coverage Termination Date.

      Excess Proceeds: For any Liquidated Mortgage Loan, the excess of

      (a) all Liquidation Proceeds from the Mortgage Loan received in the
calendar month in which the Mortgage Loan became a Liquidated Mortgage Loan, net
of any amounts previously reimbursed to the Servicer as Nonrecoverable Advances
with respect to the Mortgage Loan pursuant to Section 3.09(a)(iii), over

      (b) the sum of (i) the unpaid principal balance of the Liquidated Mortgage
Loan as of the Due Date in the month in which the Mortgage Loan became a
Liquidated Mortgage Loan plus (ii) accrued interest at the Mortgage Rate from
the Due Date for which interest was last paid or advanced (and not reimbursed)
to Certificateholders up to the Due Date applicable to the Distribution Date
following the calendar month during which the liquidation occurred.

      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 by the Depositor with respect to the Trust Fund under the
Exchange Act.

      Expense Fee Rate: As to each Mortgage Loan, the sum of (a) the Servicing
Fee Rate and (b) the Trustee Fee Rate.

      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.

      Fitch: Fitch, Inc., or any successor thereto. If Fitch is designated as a
Rating Agency in the Preliminary Statement, for purposes of Section 10.05(b) the
address for notices to Fitch shall be Fitch, Inc., One State Street Plaza, New
York, NY 10004, Attention: MBS Monitoring - IndyMac INDX 2007-AR1, or any other
address Fitch furnishes to the Depositor and the Servicer.

      FNMA: 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.

      Form 10-D Disclosure Item: With respect to any Person, any material
litigation or governmental proceedings pending against such Person, or against
any of the Trust Fund, the Depositor, the Trustee or the Servicer, if such
Person has actual knowledge thereof.

      Form 10-K Disclosure Item: With respect to any Person, (a) Form 10-D
Disclosure Item, and (b) any affiliations or relationships between such Person
and any Item 1119 Party.

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

      Fraud Loss Coverage Amount: As of the Closing Date, $21,448,947, subject
to reduction from time to time, by the amount of Fraud Losses allocated to the
Certificates. In addition, on each anniversary


                                        17
<PAGE>


of the Cut-off Date, the Fraud Loss Coverage Amount will be reduced as follows:
(a) on the first, second, third and fourth anniversaries of the Cut-off Date, to
an amount equal to the lesser of (i) 2.00% of the then current Stated Principal
Balance of the Mortgage Loans in the case of the first anniversary and 1.00% of
the then-current Stated Principal Balance of the Mortgage Loans in the case of
the second, third and fourth such anniversaries and (ii) the excess of the Fraud
Loss Coverage Amount as of the preceding anniversary of the Cut-off Date over
the cumulative amount of Fraud Losses allocated to the Certificates since such
preceding anniversary; and (b) on the fifth anniversary of the Cut-off Date, to
zero.

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

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

      Gross Margin: With respect to each Mortgage Loan, the fixed percentage set
forth in the related Mortgage Note that is added to the Mortgage Index on each
Adjustment Date in accordance with the terms of the related Mortgage Note used
to determine the Mortgage Rate for such Mortgage Loan.

      Group 1 Certificates: As specified in the Preliminary Statement.

      Group 1 Mortgage Loan: Any Mortgage Loan in Loan Group 1.

      Group 1 Senior Certificates: As specified in the Preliminary Statement.

      Group 2 Certificates: As specified in the Preliminary Statement.

      Group 2 Mortgage Loan: Any Mortgage Loan in Loan Group 2.

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

      Group 3 Certificates: As specified in the Preliminary Statement.

      Group 3 Mortgage Loan: Any Mortgage Loan in Loan Group 3.

      Group 3 Senior Certificates: As specified in the Preliminary Statement.

      Hard Prepayment Charges: As to a Mortgage Loan, any charge payable by a
Mortgagor in connection with certain partial Principal Prepayments and all
Principal Prepayments in Full made within the related Prepayment Charge Period,
the Hard Prepayment Charges with respect to each applicable Mortgage Loan so
held by the Trust Fund being identified in the Mortgage Loan Schedule.

      Hedged Certificates: Not applicable.

      Index: Not applicable.

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

      Initial Bankruptcy Loss Coverage Amount: $320,496.


                                       18
<PAGE>

      Initial LIBOR Rate: Not applicable.

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

      Insurance Proceeds: Proceeds paid by an insurer pursuant to any Insurance
Policy, in each case other than any amount included in such Insurance Proceeds
in respect of Insured Expenses.

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

      Interest Accrual Period: With respect to each Class of Delay Certificates
and any Distribution Date, the calendar month prior to the month of such
Distribution Date. All Classes of Certificates will accrue interest on the basis
of a 360-day year consisting of twelve 30-day months.

      Interest Determination Date: With respect to (a) any Interest Accrual
Period for any LIBOR Certificates and (b) any Interest Accrual Period for the
COFI Certificates for which the applicable Index is LIBOR, the second Business
Day prior to the first day of such Interest Accrual Period.

      Interest Rate: With respect to each REMIC 1 Interest, the applicable rate
set forth or calculated in the manner described in the Preliminary Statement.

      Interest Settlement Rate: As defined in Section 4.08.

      Item 1119 Party: The Depositor, the Seller, the Servicer, the Trustee and
any other material transaction party, as identified in Exhibit T hereto, as
updated pursuant to Section 11.04.

      Latest Possible Maturity Date: The Distribution Date, determined as of the
Closing Date, following the third anniversary of the later of: (i) the scheduled
maturity date of the Mortgage Loan having the latest scheduled maturity date as
of the Cut-off Date, and (ii) the latest possible maturity of any Substitute
Mortgage Loan that may be substituted for any Mortgage Loan pursuant to this
Agreement.

      Lender PMI Loans: Mortgage Loans with respect to which the lender rather
than the borrower acquired the primary mortgage guaranty insurance and charged
the related borrower an interest premium.

      LIBOR: The London interbank offered rate for one month United States
dollar deposits calculated in the manner described in Section 4.08.

      LIBOR Determination Date: For any Interest Accrual Period, the second
London Business Day prior to the commencement of such Interest Accrual Period.

      Limited Exchange Act Reporting Obligations: The obligations of the
Servicer under Section 3.17(b), Section 6.02 and Section 6.04 with respect to
notice and information to be provided to the Depositor and Article 11 (except
Section 11.07(a)(i) and (ii)).

      Liquidated Mortgage Loan: For any Distribution Date, a defaulted Mortgage
Loan (including any REO Property) that was liquidated in the calendar month
preceding the month of the Distribution


                                       19
<PAGE>


Date and as to which the Servicer has certified (in accordance with this
Agreement) that it has received all amounts it expects to receive in connection
with the liquidation of the Mortgage Loan, including the final disposition of an
REO Property.

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

      Loan Group: Any of Loan Group 1, Loan Group 2 or Loan Group 3, 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 Group 3: All Mortgage Loans identified as Group 3 Mortgage Loans on
the Mortgage Loan Schedule.

      Loan-to-Value Ratio: For any Mortgage Loan and as of any date of
determination, is the fraction whose numerator is the original principal balance
of the related Mortgage Loan at that date of determination and whose denominator
is the Appraised Value of the related Mortgaged Property.

      London Business Day: Any day on which dealings in deposits of United
States dollars are transacted in the London interbank market.

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

      Maintenance: For any Cooperative Unit, the rent paid by the Mortgagor to
the Cooperative Corporation pursuant to the Proprietary Lease.

      Maximum Mortgage Rate: For each Mortgage Loan, the percentage set forth in
the related Mortgage Note as the lifetime maximum Mortgage Rate to which such
Mortgage Rate may be adjusted.

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

      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 Mortgage Rate: For each Mortgage Loan, the percentage set forth in
the related Mortgage Note as the lifetime minimum Mortgage Rate to which such
Mortgage Rate may be adjusted.


                                       20
<PAGE>

      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.

      Moneyline Telerate Page 3750: The display page currently so designated on
the Moneyline Telerate Information Services, Inc. (or any page replacing that
page on that service for the purpose of displaying London inter-bank offered
rates of major banks).

      Monthly Statement: The statement delivered to the Certificateholders
pursuant to Section 4.06.

      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 10.05(b) the address for notices to Moody's shall be Moody's
Investors Service, Inc., 99 Church Street, New York, New York 10007, Attention:
Residential Loan Monitoring Group, or any other address that Moody's furnishes
to the Depositor and the Servicer.

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

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

      Mortgage Index: One-Year CMT Index, Six-Month LIBOR Index or One-Year
LIBOR Index.

      Mortgage Loans: Such of the mortgage loans transferred and assigned to the
Trustee pursuant to this Agreement, as from time to time are held as a part of
the Trust Fund (including any REO Property), the Mortgage Loans so held being
identified on the Mortgage Loan Schedule, notwithstanding foreclosure or other
acquisition of title of the related Mortgaged Property.

      Mortgage Loan Schedule: As of any date, the list set forth in Schedule I
of Mortgage Loans included in the Trust Fund on that date. The Mortgage Loan
Schedule shall be prepared by the Seller and shall set forth the following
information with respect to each Mortgage Loan by Loan Group:

            (i)    the loan number;

            (ii)   the street address of the Mortgaged Property, including the
                  zip code;

            (iii) the maturity date;

            (iv)   the original principal balance;

            (v)    the Cut-off Date Principal Balance;

            (vi)   the first payment date of the Mortgage Loan;

            (vii) the Scheduled Payment in effect as of the Cut-off Date;

            (viii) the Gross Margin in effect as of the Cut-off Date;

            (ix)   the Maximum Mortgage Rate in effect as of the Cut-off Date;

            (x)    the Adjustment Date in effect as of the Cut-off Date;


                                       21
<PAGE>

             (xi)   a code indicating the Mortgage Index and when it is
                  determined;

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

            (xiii) a code indicating whether the residential dwelling at the
                  time of origination was represented to be owner-occupied;

            (xiv) a code indicating whether the residential dwelling is either
                  (a) a detached single family dwelling, (b) a dwelling in a
                  PUD, (c) a condominium unit, (d) a two- to four-unit
                  residential property, or (e) a Cooperative Unit;

            (xv)   the Mortgage Rate in effect as of the Cut-off Date;

            (xvi) the purpose for the Mortgage Loan;

            (xvii) the type of documentation program pursuant to which the
                  Mortgage Loan was originated;

            (xviii) a code indicating whether the Mortgage Loan is a
                  borrower-paid mortgage insurance loan;

            (xix) the Servicing Fee Rate;

             (xx)   a code indicating whether the Mortgage Loan is a Lender PMI
                  Loan;

            (xxi) the coverage amount of any mortgage insurance;

            (xxii) with respect to the Lender PMI Loans, the interest premium
                   charged by the lender;

            (xxiii) a code indicating whether the Mortgage Loan is a Delay
                  Delivery Mortgage Loan;

            (xxiv) the Minimum Mortgage Rate in effect as of the Cut-off Date;
                  and

             (xxv) a code indicating whether the Mortgage Loan is a MERS Mortgage
                  Loan.

The schedule shall also set forth the total of the amounts described under (v)
above for all of the Mortgage Loans and for each Loan Group.

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

      Mortgage Rate: The annual rate of interest borne by a Mortgage Note from
time to time (net of the interest premium for any Lender PMI Loan).

       Mortgaged Property: The underlying property securing a Mortgage Loan,
which, with respect to a Cooperative Loan, is the related Co-op Shares and
Proprietary Lease.

      Mortgagor: The obligors on a Mortgage Note.


                                        22
<PAGE>

      National Cost of Funds Index: The National Monthly Median Cost of Funds
Ratio to SAIF-Insured Institutions published by the OTS.

      Net Prepayment Interest Shortfall: As to any Distribution Date and Loan
Group, the amount by which the aggregate of the Prepayment Interest Shortfalls
for such Loan Group and such Distribution Date exceeds an amount equal to the
sum of (a) the Compensating Interest allocable to such Loan Group for such
Distribution Date and (b) the excess, if any, of the Compensating Interest
allocable to the other Loan Groups for such Distribution Date over the
Prepayment Interest Shortfalls for such other Loan Groups and Distribution Date.

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

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

      Notice of Final Distribution: The notice to be provided pursuant to
Section 9.02 to the effect that final distribution on any of the Certificates
shall be made only upon presentation and surrender thereof.

      Notional Amount: With respect to the Class 1-A-X Certificates for the
Interest Accrual Period for any Distribution Date (x) up to and including the
Distribution Date in January 2012, the Class Certificate Balance of the Class
1-A-1 Certificates immediately prior to that Distribution Date, and (y) after
the Distribution Date in January 2012, zero.

      Notional Amount Certificates: As specified in the Preliminary Statement.

      Notional Amount Components: As specified in the Preliminary Statement.

      Offered Certificates: As specified in the Preliminary Statement.

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

      One-Year CMT Index: The weekly average yield on United States Treasury
securities adjusted to a constant maturity of one year as published by the
Federal Reserve Board in Statistical Release H.15(591) and most recently
available as of a day specified in the related Mortgage Note.

      One-Year LIBOR Index: The average of the London interbank offered rates
for one-year U.S. dollar deposits in the London market, generally as set forth
in either The Wall Street Journal or some other source generally accepted in the
residential mortgage loan origination business and specified in the related
Mortgage Note, or, if such rate ceases to be published in The Wall Street
Journal or becomes unavailable for any reason, then based upon a new index
selected by the servicer, based on comparable information, in each case, as most
recently announced as of either 45 days prior to, or the first Business Day of
the month immediately preceding the month of, such Adjustment Date.


                                       23
<PAGE>


      Opinion of Counsel: For the interpretation or application of the REMIC
Provisions, a written opinion of counsel who (i) is in fact independent of the
Depositor and the Servicer, (ii) does not have any direct financial interest in
the Depositor or the Servicer or in any affiliate of either, and (iii) is not
connected with the Depositor or the Servicer as an officer, employee, promoter,
underwriter, trustee, partner, director, or person performing similar functions.
Otherwise, a written opinion of counsel who may be counsel for the Depositor or
the Servicer, including in-house counsel, reasonably acceptable to the Trustee.

      Optional Termination Date: As defined in Section 9.01.

      Original Applicable Credit Support Percentage: With respect to each of the
following Classes of Subordinated Certificates, the corresponding percentage
described below:

         Class B-1............................................      7.95%
         Class B-2............................................      5.05%
         Class B-3............................................      3.15%
         Class B-4............................................      2.00%
         Class B-5............................................      1.15%
         Class B-6............................................      0.45%


      Original Mortgage Loan: The Mortgage Loan refinanced in connection with
the origination of a Refinance Loan.

      Original Subordinated Principal Balance: On or prior to the second Senior
Termination Date, the Subordinated Percentage of the aggregate Stated Principal
Balance of the Mortgage Loans in the related Loan Group, in each case as of the
Cut-off Date; or if such date is after the second Senior Termination Date, the
aggregate Class Certificate Balance of the Subordinated Certificates as of the
Closing Date.

      OTS: The Office of Thrift Supervision.

       Outside Reference Date: Not applicable.

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

            (i)    Certificates theretofore canceled by the Trustee or delivered
                  to the Trustee for cancellation; and

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

      Outstanding Mortgage Loan: As of any Due Date, a Mortgage Loan with a
Stated Principal Balance greater than zero that was not the subject of a
Principal Prepayment in Full before the Due Date or during the related
Prepayment Period and that did not become a Liquidated Mortgage Loan before the
Due Date.

      Overcollateralized Group: As defined in Section 4.03.


                                       24
<PAGE>


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

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

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

      Performance Certification: As defined in Section 11.05.

       Permitted Investments: At any time, any of the following:

      (i) obligations of the United States or any agency thereof 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 any lower rating that will not result in the
downgrading, qualification 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 that is then receiving the
highest commercial or finance company paper rating of each Rating Agency, or any
lower rating that will not result in the downgrading, qualification 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 or state banking authorities, provided
that the commercial paper or long-term unsecured debt obligations of the
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 the holding company, but only if Moody's
is not a Rating Agency) are then rated one of the two highest long-term and the
highest short-term ratings of each Rating Agency for the securities, or any
lower rating that will not result in the downgrading, qualification 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 the 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 issuance of the 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; provided that such repurchase obligation would be accounted for as a
financing arrangement under generally accepted accounting principles;


                                        25
<PAGE>


      (viii) securities (other than stripped bonds, stripped coupons, or
instruments sold at a purchase price in excess of 115% of their face amount)
bearing interest or sold at a discount issued by any corporation incorporated
under the laws of the United States or any state thereof that, at the time of
the investment, have one of the two highest ratings of each Rating Agency
(except if the Rating Agency is Moody's the rating shall be the highest
commercial paper rating of Moody's for the securities), or any lower rating that
will not result in the downgrading, qualification 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 that have a maturity date
occurring no more than 365 days from their date of issuance;

      (ix) units of a taxable money-market portfolio having the highest rating
assigned by each Rating Agency (except (i) if Fitch is a Rating Agency and has
not rated the portfolio, the highest rating assigned by Moody's and (ii) if S&P
is a Rating Agency, "AAAm" or "AAAM-G" by S&P) and restricted to obligations
issued or guaranteed by the United States of America or entities whose
obligations are backed by the full faith and credit of the United States of
America and repurchase agreements collateralized by such obligations; and

      (x) any other investments bearing interest or sold at a discount
acceptable to each Rating Agency that will not result in the downgrading,
qualification 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.

      No Permitted Investment may (i) evidence the right to receive interest
only payments with respect to the obligations underlying the instrument, (ii) be
sold or disposed of before its maturity or (iii) be any obligation of the Seller
or any of its Affiliates. Any Permitted Investment shall be relatively risk free
and no options or voting rights shall be exercised with respect to any Permitted
Investment. Any Permitted Investment shall be sold or disposed of in accordance
with Financial Accounting Standard 140, paragraph 35c(6) in effect as of the
Closing Date.

      Permitted Transferee: Any person other than

      (i) the United States, any State or political subdivision thereof, or any
agency or instrumentality of any of the foregoing,

      (ii) a foreign government, International Organization, or any agency or
instrumentality of either of the foregoing,

      (iii) an organization (except certain farmers' cooperatives described in
section 521 of the Code) that is exempt from tax imposed by Chapter 1 of the
Code (including the tax imposed by section 511 of the Code on unrelated business
taxable income) on any excess inclusions (as defined in section 860E(c)(1) of
the Code) with respect to any Residual Certificate,

      (iv) a rural electric and telephone cooperatives described in section
1381(a)(2)(C) of the Code,

      (v) an "electing large partnership" as defined in section 775 of the Code,

      (vi) a Person that is not a U.S. Person, and


                                       26
<PAGE>

 
      (vii) any other Person so designated by the Depositor based on an Opinion
of Counsel that the Transfer of an Ownership Interest in a Residual Certificate
to the Person may cause any REMIC to fail to qualify as a REMIC at any time that
the Certificates are outstanding.

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

      Physical Certificates: As specified in the Preliminary Statement.

      Planned Balance: Not applicable.

      Planned Principal Classes: As specified in the Preliminary Statement.

      Pool Stated Principal Balance: The aggregate Stated Principal Balance of
the Mortgage Loans.

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

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

      Prepayment Interest Excess: As to any Principal Prepayment received by the
Servicer on a Mortgage Loan from the first day through the fifteenth day of any
calendar month other than the month of the Cut-off Date, all amounts paid by the
related Mortgagor in respect of interest on such Principal Prepayment. All
Prepayment Interest Excess shall be retained by the Servicer as additional
servicing compensation.

      Prepayment Interest Shortfall: As to any Distribution Date, Mortgage Loan
and Principal Prepayment received on or after the sixteenth day of the month
preceding the month of such Distribution Date (or, in the case of the first
Distribution Date, on or after the Cut-off Date) and on or before the last day
of the month preceding the month of such Distribution Date, the amount, if any,
by which one month's interest at the related Mortgage Rate, net of the Servicing
Fee Rate, on such Principal Prepayment exceeds the amount of interest paid in
connection with such Principal Prepayment.

      Prepayment Period: As to any Distribution Date and related Due Date, the
period from and including the 16th day of the month immediately prior to the
month of such Distribution Date (or, in the case of the first Distribution Date,
from the Cut-off Date) and to and including the 15th day of the month of such
Distribution Date.

      Prepayment Shift Percentage: Not applicable.

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

      Principal Amount: As to any Distribution Date and each Loan Group, the sum
of (a) all monthly payments of principal due on each Mortgage Loan in that Loan
Group on the related Due Date, (b) the principal portion of the Purchase Price
of each Mortgage Loan in that Loan Group that was repurchased by the Seller
pursuant to this Agreement as of such Distribution Date, excluding any Mortgage
Loan that


                                       27
<PAGE>


was purchased by the Servicer as provided in Section 3.12, (c) the Substitution
Adjustment Amount in connection with any Deleted Mortgage Loan in that Loan
Group received with respect to such Distribution Date, (d) any Insurance
Proceeds or Liquidation Proceeds allocable to recoveries of principal of
Mortgage Loans in that Loan Group that are not yet Liquidated Mortgage Loans
received during the calendar month preceding the month of such Distribution
Date, (e) with respect to each Mortgage Loan in that Loan Group that became a
Liquidated Mortgage Loan during the calendar month preceding the month of such
Distribution Date, the amount of Liquidation Proceeds allocable to principal
received with respect to such Mortgage Loan, (f) all partial and full Principal
Prepayments on the Mortgage Loans in that Loan Group received during the related
Prepayment Period, and (g) any Subsequent Recoveries with respect to the
Mortgage Loans in that Loan Group received during the calendar month preceding
the month of such Distribution Date.

      Principal Only Certificates: As specified in the Preliminary Statement.

      Principal Prepayment: Any payment of principal by a Mortgagor on a
Mortgage Loan (including the principal portion of the Purchase Price of any
Mortgage Loan purchased by the Servicer pursuant to Section 3.12) that is
received in advance of its scheduled Due Date and is not accompanied by an
amount representing scheduled interest due on any date in any month after the
month of prepayment. The Servicer shall apply partial Principal Prepayments in
accordance with the related Mortgage Note.

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

      Principal Relocation Payment: A payment from any Loan Group to REMIC 1
Interests other than those of their corresponding Loan Group as provided in the
Preliminary Statement. Principal Relocation Payments shall be made of principal
allocations comprising the Principal Amount from a Loan Group.

      Private Certificates: As specified in the Preliminary Statement.

      Pro Rata Share: As to any Distribution Date and any Class of Subordinated
Certificates, the portion of the Subordinated Principal Distribution Amount
allocable to such Class, equal to the product of the Subordinated Principal
Distribution Amount on such Distribution Date and a fraction, the numerator of
which is the related Class Certificate Balance thereof and the denominator of
which is the aggregate Class Certificate Balance of the Subordinated
Certificates, in each case immediately prior to such Distribution Date.

      Proprietary Lease: For any Cooperative Unit, a lease or occupancy
agreement between a Cooperative Corporation and a holder of related Co-op
Shares.

      Prospectus Supplement: The Prospectus Supplement dated February 27, 2007,
relating to the Offered Certificates, and any supplement to the Prospectus
Supplement.

      PUD: Planned Unit Development.

      Purchase Price: For any Mortgage Loan required to be purchased by the
Seller pursuant to Section 2.02 or 2.03 or purchased by the Servicer pursuant to
Section 3.12, the sum of

       (i) 100% of the unpaid principal balance of the Mortgage Loan on the date
of the purchase,


                                       28
<PAGE>

      (ii) accrued and unpaid interest on the Mortgage Loan at the applicable
Mortgage Rate (or at the applicable Adjusted Mortgage Rate if (x) the purchaser
is the Servicer or (y) if the purchaser is the Seller and the Seller is the
Servicer) 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, net of any unreimbursed Advances made by the Servicer on the
Mortgage Loan, and

      (iii) any costs and damages incurred by the Trust Fund in connection with
any violation by the Mortgage Loan of any predatory or abusive lending law.

      If the Mortgage Loan is purchased pursuant to Section 3.12, the interest
component of the Purchase Price shall be computed (i) on the basis of the
applicable Adjusted Mortgage Rate before giving effect to the related
modification and (ii) from the date to which interest was last paid to the date
on which the Mortgage Loan is assigned to the Servicer pursuant to Section 3.12.

      Qualified Insurer: A mortgage guaranty insurance company duly qualified as
such under the laws of the state of its principal place of business and each
state having jurisdiction over the insurer in connection with the insurance
policy issued by the insurer, duly authorized and licensed in such states to
transact a mortgage guaranty insurance business in such states and to write the
insurance provided by the insurance policy issued by it, approved as a FNMA- or
FHLMC-approved mortgage insurer or having a claims paying ability rating of at
least "AA" or equivalent rating by a nationally recognized statistical rating
organization. Any replacement insurer with respect to a Mortgage Loan must have
at least as high a claims paying ability rating as the insurer it replaces had
on the Closing Date.

      Rating Agency: Each of the Rating Agencies specified in the Preliminary
Statement. If any of them or a successor is no longer in existence, "Rating
Agency" shall be the nationally recognized statistical rating organization, or
other comparable Person, designated by the Depositor and identified as a "Rating
Agency" in the Underwriters' Exemption, notice of which designation shall be
given to the Trustee. References to a given rating or rating category of a
Rating Agency means the 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 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 Adjusted 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 Adjusted 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 that 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.

      To the extent the 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.


                                       29
<PAGE>


      Recognition Agreement: For any Cooperative Loan, an agreement between the
Cooperative Corporation and the originator of the Mortgage Loan that establishes
the rights of the originator in the Cooperative Property.

      Record Date: With respect to any Distribution Date, the close of business
on the last Business Day of the month preceding the month of that Distribution
Date.

      Reference Bank: As defined in Section 4.08.

      Refinance Loan: Any Mortgage Loan the proceeds of which are used to
refinance an Original 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.

      Relief Act: The Servicemembers Civil Relief Act.

      Relief Act Reductions: 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 or any similar state or local laws, the
amount, if any, by which (i) interest collectible on such Mortgage Loan for the
most recently ended calendar month is less than (ii) interest accrued thereon
for such month pursuant to the Mortgage Note.

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

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

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

      Reportable Event: Any event required to be reported on Form 8-K, and in
any event, the following:

      (a) entry into a definitive agreement related to the Trust Fund, the
Certificates or the Mortgage Loans, or an amendment to a Transaction Document,
even if the Depositor is not a party to such agreement (e.g., a servicing
agreement with a servicer contemplated by Item 1108(a)(3) of Regulation AB);

      (b) termination of a Transaction Document (other than by expiration of the
agreement on its stated termination date or as a result of all parties
completing their obligations under such agreement), even if the Depositor is not
a party to such agreement (e.g., a servicing agreement with a servicer
contemplated by Item 1108(a)(3) of Regulation AB);


                                       30
<PAGE>

       (c) with respect to the Servicer only, if the Servicer becomes aware of
any bankruptcy or receivership with respect to the Seller, the Depositor, the
Servicer, the Trustee, the Cap Counterparty, any enhancement or support provider
contemplated by Items 1114(b) or 1115 of Regulation AB, or any other material
party contemplated by Item 1101(d)(1) of Regulation AB;

      (d) with respect to the Trustee, the Servicer and the Depositor only, the
occurrence of an early amortization, performance trigger or other event,
including an Event of Default under this Agreement;

      (e) any amendment to this Agreement;

      (f) the resignation, removal, replacement, substitution of the Servicer or
the Trustee;

      (g) with respect to the Servicer only, if the Servicer becomes aware that
(i) any material enhancement or support specified in Item 1114(a)(1) through (3)
of Regulation AB or Item 1115 of Regulation AB that was previously applicable
regarding one or more Classes of the Certificates has terminated other than by
expiration of the contract on its stated termination date or as a result of all
parties completing their obligations under such agreement; (ii) any material
enhancement specified in Item 1114(a)(1) through (3) of Regulation AB or Item
1115 of Regulation AB has been added with respect to one or more Classes of the
Certificates; or (iii) any existing material enhancement or support specified in
Item 1114(a)(1) through (3) of Regulation AB or Item 1115 of Regulation AB with
respect to one or more Classes of the Certificates has been materially amended
or modified; and

      (h) with respect to the Trustee, the Servicer and the Depositor only, a
required distribution to Holders of the Certificates is not made as of the
required Distribution Date under this Agreement.

      Reporting Subcontractor: With respect to the Servicer or the Trustee, any
Subcontractor determined by such Person pursuant to Section 11.08(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.

      Request for Release: The Request for Release submitted by the Servicer to
the Trustee, substantially in the form of Exhibits M and N, as appropriate.

      Required Insurance Policy: For any Mortgage Loan, any insurance policy
that is required to be maintained from time to time under this Agreement.

      Residual Certificates: As specified in the Preliminary Statement.

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

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

      SAIF: The Savings Association Insurance Fund, or any successor thereto.

       Sarbanes-Oxley Certification: As defined in Section 11.05.


                                       31
<PAGE>

      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 10.05(b) the address for notices to S&P shall be Standard & Poor's, a
division of The McGraw-Hill Companies, Inc., 55 Water Street, New York, New York
10041, Attention: Mortgage Surveillance Monitoring, or any other address that
S&P furnishes to the Depositor and the Servicer.

      Scheduled Balance: Not applicable.

      Scheduled Classes: As specified in the Preliminary Statement.

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

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

      Security Agreement: For any Cooperative Loan, the agreement between the
owner of the related Co-op Shares and the originator of the related Mortgage
Note that defines the security interest in the Co-op Shares and the related
Proprietary Lease.

      Seller: IndyMac Bank, F.S.B., a federal savings bank, and its successors
and assigns, in its capacity as seller of the Mortgage Loans to the Depositor.

      Senior Certificate Group: As specified in the Preliminary Statement.

      Senior Certificates: As specified in the Preliminary Statement.

      Senior Credit Support Depletion Date: The date on which the Class
Certificate Balance of each Class of Subordinated Certificates has been reduced
to zero.

      Senior Percentage: As to any Senior Certificate Group and Distribution
Date, the percentage equivalent of a fraction the numerator of which is the
aggregate Class Certificate Balance of the Senior Certificates of such Senior
Certificate Group immediately before the Distribution Date and the denominator
of which is the aggregate Stated Principal Balance of the Mortgage Loans in the
related Loan Group as of the Due Date occurring in the month prior to the month
of that Distribution Date (after giving effect to Principal Prepayments received
on the related Mortgage Loans in the Prepayment Period related to such prior Due
Date); provided, however, that on any Distribution Date after the second Senior
Termination Date, the Senior Percentage for the Senior Certificates of the
remaining Senior Certificate Group is the percentage equivalent of a fraction,
the numerator of which is the aggregate Class Certificate Balance of the Senior
Certificates of such remaining Senior Certificate Group immediately prior to
such Distribution Date and the denominator is the aggregate Class Certificate
Balance of all Classes of Certificates immediately prior to that Distribution
Date.

      Senior Prepayment Percentage: As to a Senior Certificate Group and any
Distribution Date during the seven years beginning on the first Distribution
Date, 100%. The related Senior Prepayment Percentage for any Distribution Date
occurring on or after the seventh anniversary of the first Distribution Date
will, except as provided in this Agreement, be as follows: for any Distribution
Date in the first year thereafter, the related Senior Percentage plus 70% of the
related Subordinated Percentage for such Distribution Date; for any Distribution
Date in the second year thereafter, the related Senior Percentage plus 60% of
the related Subordinated Percentage for such Distribution Date; for any
Distribution Date in


                                       32
<PAGE>


the third year thereafter, the related Senior Percentage plus 40% of the related
Subordinated Percentage for such Distribution Date; for any Distribution Date in
the fourth year thereafter, the related Senior Percentage plus 20% of the
related Subordinated Percentage for such Distribution Date; and for any
Distribution Date thereafter, the related Senior Percentage for such
Distribution Date (unless on any Distribution Date the Senior Percentage of a
Senior Certificate Group exceeds the initial Senior Percentage for such Senior
Certificate Group in which case the Senior Prepayment Percentage for each Senior
Certificate Group for such Distribution Date will once again equal 100%).
Notwithstanding the foregoing, no decrease in any Senior Prepayment Percentage
will occur unless both Senior Step Down Conditions are satisfied with respect to
all of the Mortgage Loans.

      Notwithstanding the preceding paragraphs, if (x) on or before the
Distribution Date in February 2010, the Aggregate Subordinated Percentage is at
least 200% of the Aggregate Subordinated Percentage as of the Closing Date, the
delinquency test set forth in the definition of Senior Step Down Conditions is
satisfied and cumulative Realized Losses do not exceed 20% of the aggregate
Class Certificate Balance of the Subordinated Certificates as of the Closing
Date, the Senior Prepayment Percentage for each Senior Certificate Group will
equal the related Senior Percentage for that Distribution Date plus 50% of an
amount equal to 100% minus the related Senior Percentage for that Distribution
Date and (y) after the Distribution Date in February 2010, the Aggregate
Subordinated Percentage is at least 200% of the Aggregate Subordinated
Percentage as of the Closing Date, the delinquency test set forth in the
definition of Senior Step Down Conditions is satisfied and cumulative Realized
Losses do not exceed 30% of the aggregate Class Certificate Balance of the
Subordinated Certificates as of the Closing Date, the Senior Prepayment
Percentage for each Senior Certificate Group will equal the related Senior
Percentage.

      Senior Principal Distribution Amount: As to any Distribution Date and any
Loan Group, the sum of (i) the related Senior Percentage of all amounts
described in clauses (a) through (d) of the definition of Principal Amount for
that Loan Group and such Distribution Date, (ii) with respect to any Mortgage
Loan that became a Liquidated Mortgage Loan during the calendar month preceding
the month of such Distribution Date, the lesser of (x) the related Senior
Percentage of the Stated Principal Balance of such Mortgage Loan and (y) either
(A) if no Excess Losses were sustained on the Liquidated Mortgage Loan during
the preceding calendar month, the related Senior Prepayment Percentage of the
amount of the Liquidation Proceeds allocable to principal received on the
Mortgage Loan or (B) if an Excess Loss was sustained with respect to such
Liquidated Mortgage Loan during such preceding calendar month, the Senior
Percentage of the amount of the Liquidation Proceeds allocable to principal
received with respect to such Mortgage Loan, and (iii) the sum of (x) the Senior
Prepayment Percentage of the amounts described in clause (f) of the definition
of Principal Amount for that Loan Group and such Distribution Date, and (y) the
applicable Senior Prepayment Percentage of any Subsequent Recoveries described
in clause (g) of the definition of Principal Amount for that Loan Group and such
Distribution Date; provided, however, that if a Bankruptcy Loss that is an
Excess Loss is sustained with respect to a Mortgage Loan in that Loan Group that
is not a Liquidated Mortgage Loan, the Senior Principal Distribution Amount will
be reduced on the related Distribution Date by the Senior Percentage of the
applicable principal portion of such Bankruptcy Loss; provided further, however,
on any Distribution Date after the second Senior Termination Date, the Senior
Principal Distribution Amount for the remaining Senior Certificate Group will be
calculated pursuant to the above formula based on all the Mortgage Loans in the
Mortgage Pool, as opposed to the Mortgage Loans in the related Loan Group.

      Senior Step Down Conditions: As to any Distribution Date: (i) the
aggregate Stated Principal Balance of all the Mortgage Loans 60 days or more
Delinquent (averaged over the preceding six month period) (including any
Mortgage Loans subject to foreclosure proceedings, REO Property (regardless of
whether that Mortgage Loan is 60 days or more Delinquent) and Mortgage Loans the
Mortgagors of which are in bankruptcy), as a percentage (a) if such date is on
or prior to second Senior Termination Date, the Subordinated Percentage for that
Loan Group of the aggregate Stated Principal Balance of the


                                       33
<PAGE>


Mortgage Loans in that Loan Group, or (b) if such date is after the second
Senior Termination Date, the aggregate Class Certificate Balance of the
Subordinated Certificates immediately prior to such Distribution Date, does not
equal or exceed 50%, and (ii) cumulative Realized Losses do not exceed: (a)
commencing with the Distribution Date on the seventh anniversary of the first
Distribution Date, 30% of the Original Subordinated Principal Balance, (b)
commencing with the Distribution Date on the eighth anniversary of the first
Distribution Date, 35% of the Original Subordinated Principal Balance, (c)
commencing with the Distribution Date on the ninth anniversary of the first
Distribution Date, 40% of the Original Subordinated Principal Balance, (d)
commencing with the Distribution Date on the tenth anniversary of the first
Distribution Date, 45% of the Original Subordinated Principal Balance, and (e)
commencing with the Distribution Date on the eleventh anniversary of the first
Distribution Date and thereafter, 50% of the Original Subordinated Principal
Balance.

       Senior Termination Date: For each Senior Certificate Group, the
Distribution Date on which the aggregate Class Certificate Balance of the
related Classes of Senior Certificates has been reduced to zero.

      Servicer: IndyMac Bank, F.S.B., a federal savings bank, and its successors
and assigns, in its capacity as servicer under this Agreement.

      Servicer Advance Date: As to any Distribution Date, 12:30 P.M. Pacific
time on the Business Day preceding that Distribution Date.

      Servicing Advances: All customary, reasonable, and necessary "out of
pocket" costs and expenses incurred in the performance by the Servicer of its
servicing obligations, including the cost of

          (a) the preservation, restoration, and protection of a Mortgaged
     Property,

          (b) expenses reimbursable to the Servicer pursuant to Section 3.12 and
     any enforcement or judicial proceedings, including foreclosures,

          (c) the maintenance and liquidation of any REO Property,

          (d) compliance with the obligations under Section 3.10, and

          (e) reasonable compensation to the Servicer or its affiliates for
     acting as broker in connection with the sale of foreclosed Mortgaged
     Properties and for performing certain default management and other similar
     services (including appraisal services) in connection with the servicing of
     defaulted Mortgage Loans. For purposes of this clause (e), only costs and
     expenses incurred in connection with the performance of activities
     generally considered to be outside the scope of customary servicing or
     master servicing duties shall be treated as Servicing Advances.

      Servicing Criteria: The "servicing criteria" set forth in Item 1122(d) of
Regulation AB.

      Servicing Fee: As to each Mortgage Loan and any Distribution Date, one
month's interest at the applicable Servicing Fee Rate on the Stated Principal
Balance of the Mortgage Loan as of the Due Date in the month preceding the
month of such Distribution Date (after giving effect to Principal Prepayments
in the Prepayment Period related to that prior Due Date), or, whenever a
payment of interest accompanies a Principal Prepayment in Full made by the
Mortgagor, interest at the Servicing Fee Rate on the Stated Principal Balance
of the Mortgage Loan for the period covered by the payment of interest,
subject to reduction as provided in Section 3.15.

      Servicing Fee Rate: For each Mortgage Loan, 0.375%.


                                       34
<PAGE>


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

      Servicing Standard: That degree of skill and care exercised by the
Servicer with respect to mortgage loans comparable to the Mortgage Loans
serviced by the Servicer for itself or others.

      Six-Month LIBOR Index: The average of the London interbank offered rates
for six month U.S. dollar deposits in the London market, generally as set forth
in either The Wall Street Journal or some other source generally accepted in the
residential mortgage loan origination business and specified in the related
Mortgage Note or, if such rate ceases to be published in The Wall Street Journal
or becomes unavailable for any reason, then based upon a new index selected by
the Servicer, based on comparable information, in each case, as most recently
announced as of either 45 days prior to, or the first Business Day of the month
immediately preceding the month of, such Adjustment Date.

      Soft Prepayment Charges: As to a Mortgage Loan, any charge payable by a
Mortgagor in connection with certain partial Principal Prepayments and all
Principal Prepayments in Full made within the related Prepayment Charge Period
other than as a result of selling the Mortgaged Property, the Soft Prepayment
Charges with respect to each applicable Mortgage Loan so held by the Trust Fund
being identified in the Mortgage Loan Schedule.

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

      Special Hazard Loss: Any Realized Loss suffered by a Mortgaged Property on
account of direct physical loss, but not including (i) any loss of a type
covered by a hazard insurance policy or a flood insurance policy required to be
maintained with respect to such Mortgaged Property pursuant to Section 3.10 to
the extent of the amount of such loss covered thereby, or (ii) any loss caused
by or resulting from:

          (a) normal wear and tear;

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

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

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

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

                  1. by any government or sovereign power, de jure or de facto,
            or by any authority maintaining or using military, naval or air
            forces; or

                  2. by military, naval or air forces; or


                                       35
<PAGE>


                  3. by an agent of any such government, power, authority or
             forces;

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

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

      Special Hazard Loss Coverage Amount: With respect to the first
Distribution Date, $7,149,649. With respect to any Distribution Date after the
first Distribution Date, the lesser of (a) the greatest of (i) 1% of the
aggregate of the principal balances of the Mortgage Loans, (ii) twice the
principal balance of the largest Mortgage Loan and (iii) the aggregate of the
principal balances of all Mortgage Loans secured by Mortgaged Properties located
in the single California postal zip code area having the highest aggregate
principal balance of any such zip code area and (b) the Special Hazard Loss
Coverage Amount as of the Closing Date less the amount, if any, of Special
Hazard Losses allocated to the Certificates since the Closing Date. All
principal balances for the purpose of this definition will be calculated as of
the first day of the calendar month preceding the month of such Distribution
Date after giving effect to Scheduled Payments on the Mortgage Loans then due,
whether or not paid.

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

      Startup Day: The Closing Date.

      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 the sum of: (i) the payment of principal
due on such Due Date and irrespective of any delinquency in payment by the
related Mortgagor and (ii) any Liquidation Proceeds allocable to principal
received in the prior calendar month and Principal Prepayments received through
the last day of the Prepayment Period in which the Due Date occurs, in each case
with respect to such Mortgage Loan.

      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 the Mortgage Loans under the direction or authority of the
Servicer or the Trustee, as the case may be.

      Subordinate Pass-Through Rate: As to any Class of Subordinated
Certificates and the Interest Accrual Period for any Distribution Date, a per
annum rate equal to (a) the sum of the following for each Loan Group: the
product of (x) the Assumed Balance for each Loan Group immediately prior to that
Distribution Date and (y) the Weighted Average Adjusted Net Mortgage Rate of the
Mortgage Loans in that Loan Group divided by (b) the aggregate Class Certificate
Balance of the Subordinated Certificates immediately prior to that Distribution
Date.

      Subordinated Certificates: As specified in the Preliminary Statement.


                                       36
<PAGE>


      Subordinated Percentage: As to any Distribution Date on or prior to the
second Senior Termination Date and any Loan Group, 100% minus the Senior
Percentage for the Senior Certificate Group relating to such Loan Group for such
Distribution Date. As to any Distribution Date after the second Senior
Termination Date, 100% minus the Senior Percentage for such Distribution Date.

      Subordinated Prepayment Percentage: As to any Distribution Date and Loan
Group, 100% minus the related Senior Prepayment Percentage for such Distribution
Date.

      Subordinated Principal Distribution Amount: As to any Distribution Date
and Loan Group, the sum of the following with respect to each Loan Group: (i)
the Subordinated Percentage of all amounts described in clauses (a) through (d)
of the definition of Principal Amount with respect to such Loan Group and such
Distribution Date, (ii) with respect to any Mortgage Loan in the related Loan
Group that became a Liquidated Mortgage Loan during the calendar month preceding
the month of such Distribution Date, the amount of Liquidation Proceeds
allocable to principal received with respect thereto remaining after application
thereof pursuant to clause (ii) of the definition of Senior Principal
Distribution Amount for that Loan Group, up to the related Subordinated
Percentage of the Stated Principal Balance of such Mortgage Loan and (iii) the
sum of the Subordinated Prepayment Percentage of the amounts described in
clauses (f) and (g) of the definition of Principal Amount with respect to that
Loan Group for such Distribution Date; provided, however, that on any
Distribution Date after the second Senior Termination Date, the Subordinated
Principal Distribution Amount will not be calculated by Loan Group but will
equal the amount calculated pursuant to the formula set forth above based on the
applicable Subordinated Percentage and Subordinated Prepayment Percentage for
the Subordinated Certificates for such Distribution Date with respect to all of
the Mortgage Loans as opposed to the Mortgage Loans only in the related Loan
Group.

      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, unexpected amounts received by the Servicer (net of any related expenses
permitted to be reimbursed pursuant to Section 3.09) specifically related to
such Liquidated Mortgage Loan.

      Substitute Mortgage Loan: A Mortgage Loan substituted by the Seller for a
Deleted Mortgage Loan that must, on the date of substitution, as confirmed in a
Request for Release, substantially in the form of Exhibit M,

      (i) have a Stated Principal Balance, after deduction of the principal
portion of the Scheduled Payment due in the month of substitution, not in excess
of, and not more than 10% less than, the Stated Principal Balance of the Deleted
Mortgage Loan (unless the amount of any shortfall is deposited by the Seller in
the Certificate Account and held for distribution to the Certificateholders on
the related Distribution Date);

      (ii) have a Mortgage Rate no lower than and not more than 1% per annum
higher than the Deleted Mortgage Loan;

      (iii) have a Maximum Mortgage Rate not more than 1% per annum higher than
            and not lower than the Maximum Mortgage Rate of the deleted Mortgage
            Loan;

      (iv)   have the same Mortgage Index and interval between Adjustment Dates
            as the deleted Mortgage Loan and a Gross Margin not more than 1% per
            annum higher than, and not lower than that of the deleted Mortgage
            Loan, provided that any such Substitute Mortgage Loan with a
            remaining term to maturity greater than that of the Deleted Mortgage
            Loan may not exceed 5% of the Cut-off Date Pool Principal Balance;


                                       37
<PAGE>

      (vi)   have a Loan-to-Value Ratio no higher than that of the Deleted
            Mortgage Loan;

      (vii) have a remaining term to maturity no greater than (and not more than
             one year less than) that of the Deleted Mortgage Loan;

      (viii) not be a Cooperative Loan unless the Deleted Mortgage Loan was a
            Cooperative Loan; and

      (ix)   comply with each representation and warranty in Section 2.03.

      Substitution Adjustment Amount: As defined in Section 2.03.

      Suspension Notification: Notification to the Commission of the suspension
of the Trust Fund's obligation to file reports pursuant to Section 15(d) of the
Exchange Act.

      Targeted Balance: Not applicable.

      Targeted Principal Classes: As specified in the Preliminary Statement.

      Transaction Documents: This Agreement and any other document or agreement
entered into in connection with the Trust Fund, the Certificates or the Mortgage
Loans.

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

      Transfer Payment Made: As defined in Section 4.03.

      Transfer Payment Received: As defined in Section 4.03.

      Trust Fund: The corpus of the trust created under this Agreement
consisting of

      (i) the Mortgage Loans and all interest and principal received on them
after the Cut-off Date, other than amounts due on the Mortgage Loans by the
Cut-off Date;

      (ii) the Certificate Account, the Distribution Account and all amounts
deposited therein pursuant to this Agreement (including amounts received from
the Seller on the Closing Date that will be deposited by the Trustee in the
Certificate Account pursuant to Section 2.01);

      (iii) property that secured a Mortgage Loan and has been acquired by
foreclosure, deed-in-lieu of foreclosure, or otherwise;

      (iv) the right to collect any amounts under any mortgage insurance
policies covering any Mortgage Loan and any collections received under any
mortgage insurance policies covering any Mortgage Loan;

      (v) all proceeds of the conversion, voluntary or involuntary, of any of
the foregoing.

      Trustee: Deutsche Bank National Trust Company and its successors and, if a
successor trustee is appointed under this Agreement, the successor.

      Trustee Fee: The fee payable to the Trustee on each Distribution Date for
its services as Trustee hereunder, in an amount equal to one-twelfth of the
Trustee Fee Rate multiplied by the aggregate Stated Principal Balance of the
Mortgage Loans as of the Due Date in the month preceding the month of such
Distribution Date (after giving effect to Principal Prepayments in the
Prepayment Period related to that prior Due Date).


                                        38
<PAGE>


      Trustee Fee Rate: 0.0045% per annum.

      The terms "United States," "State," and "International Organization" have
the meanings in section 7701 of the Code or successor provisions. A corporation
will not be treated as an instrumentality of the United States or of any State
or political subdivision thereof for these purposes if all of its activities are
subject to tax and, with the exception of the Federal Home Loan Mortgage
Corporation, a majority of its board of directors is not selected by such
government unit.

      UCC: The Uniform Commercial Code for the State of New York.

      Undercollateralized Group: As defined in Section 4.03.

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

      United States Person or U.S. Person:

      (i) A citizen or resident of the United States;

       (ii) a corporation (or entity treated as a corporation for tax purposes)
created or organized in the United States or under the laws of the United States
or of any state thereof, including, for this purpose, the District of Columbia;

      (iii) a partnership (or entity treated as a partnership for tax purposes)
organized in the United States or under the laws of the United States or of any
state thereof, including, for this purpose, the District of Columbia (unless
provided otherwise by future Treasury regulations);

      (iv) an estate whose income is includible in gross income for United
States income tax purposes regardless of its source; or

      (v) a trust, if a court within the United States is able to exercise
primary supervision over the administration of the trust and one or more U.S.
Persons have authority to control all substantial decisions of the trust.
Notwithstanding the last clause of the preceding sentence, to the extent
provided in Treasury regulations, certain trusts in existence on August 20,
1996, and treated as U.S. Persons before that date, may elect to continue to be
U.S. Persons.

      U.S.A. Patriot Act: The Uniting and Strengthening America by Providing
Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001.

      Voting Rights: The portion of the voting rights of all of the Certificates
that is allocated to any Certificate. As of any date of determination, (a) 1% of
all Voting Rights shall be allocated to the Holder of the Class A-R
Certificates, (b) 1% of all Voting Rights shall be allocated to the Holder of
the Class 1-A-X Certificates and (c) the remaining Voting Rights shall be
allocated among Holders of the remaining Classes of Offered Certificates in
proportion to the Certificate Balances of the respective Certificates on the
date.


                                       39
<PAGE>

      Weighted Average Adjusted Net Mortgage Rate: For any Distribution Date and
Loan Group, the average of the Adjusted Net Mortgage Rate of each Mortgage Loan
in that Loan Group, weighted on the basis of its Stated Principal Balance as of
the Due Date in the prior month (after giving effect to Principal Prepayments in
the Prepayment Period related to such prior Due Date).

      Weighted Average Initial Adjustment Date: Not applicable.

      Withdrawal Date: The 18th day of each month, or if such day is not a
Business Day, the next preceding Business Day.

      Section 1.02 Rules of Construction.

      Except as otherwise expressly provided in this Agreement or unless the
context clearly requires otherwise

      (a) References to designated articles, sections, subsections, exhibits,
and other subdivisions of this Agreement, such as "Section 6.12 (a)," refer to
the designated article, section, subsection, exhibit, or other subdivision of
this Agreement as a whole and to all subdivisions of the designated article,
section, subsection, exhibit, or other subdivision. The words "herein,"
"hereof," "hereto," "hereunder," and other words of similar import refer to this
Agreement as a whole and not to any particular article, section, exhibit, or
other subdivision of this Agreement.

      (b) Any term that relates to a document or a statute, rule, or regulation
includes any amendments, modifications, supplements, or any other changes that
may have occurred since the document, statute, rule, or regulation came into
being, including changes that occur after the date of this Agreement.

      (c) Any party may execute any of the requirements under this Agreement
either directly or through others, and the right to cause something to be done
rather than doing it directly shall be implicit in every requirement under this
Agreement. Unless a provision is restricted as to time or limited as to
frequency, all provisions under this Agreement are implicitly available and
things may happen from time to time.

      (d) The term "including" and all its variations mean "including but not
limited to." Except when used in conjunction with the word "either," the word
"or" is always used inclusively (for example, the phrase "A or B" means "A or B
or both," not "either A or B but not both").

      (e) A reference to "a [thing]" or "any [of a thing]" does not imply the
existence or occurrence of the thing referred to even though not followed by "if
any," and "any [of a thing]" is any of it. A reference to the plural of anything
as to which there could be either one or more than one does not imply the
existence of more than one (for instance, the phrase "the obligors on a note"
means "the obligor or obligors on a note"). "Until [something occurs]" does not
imply that it must occur, and will not be modified by the word "unless." The
word "due" and the word "payable" are each used in the sense that the stated
time for payment has passed. The word "accrued" is used in its accounting sense,
i.e., an amount paid is no longer accrued. In the calculation of amounts of
things, differences and sums may generally result in negative numbers, but when
the calculation of the excess of one thing over another results in zero or a
negative number, the calculation is disregarded and an "excess" does not exist.
Portions of things may be expressed as fractions or percentages interchangeably.

      (f) All accounting terms used in an accounting context and not otherwise
defined, and accounting terms partly defined in this Agreement, to the extent
not completely defined, shall be construed in accordance with generally accepted
accounting principles. To the extent that the definitions of


                                        40
<PAGE>


accounting terms in this Agreement are inconsistent with their meanings under
generally accepted accounting principles, the definitions contained in this
Agreement shall control. Capitalized terms used in this Agreement without
definition that are defined in the Uniform Commercial Code are used in this
Agreement as defined in the Uniform Commercial Code.

      (g) In the computation of a period of time from a specified date to a
later specified date or an open-ended period, the words "from" and "beginning"
mean "from and including," the word "after" means "from but excluding," the
words "to" and "until" mean "to but excluding," and the word "through" means "to
and including." Likewise, in setting deadlines or other periods, "by" means
"by." The words "preceding," "following," and words of similar import, mean
immediately preceding or following. References to a month or a year refer to
calendar months and calendar years.

      (h) Any reference to the enforceability of any agreement against a party
means that it is enforceable, subject as to enforcement against the party, to
applicable bankruptcy, insolvency, reorganization, and other similar laws of
general applicability relating to or affecting creditors' rights and to general
equity principles.


                                       41
<PAGE>


                                  ARTICLE TWO

          CONVEYANCE OF MORTGAGE LOANS; REPRESENTATIONS AND WARRANTIES

      Section 2.01 Conveyance of Mortgage Loans.

      (a) The Seller, concurrently with the execution and delivery of this
Agreement, hereby transfers to the Depositor, without recourse, all the interest
of the Seller in each Mortgage Loan, including all interest and principal
received or receivable by the Seller on each Mortgage Loan after the Cut-off
Date and all interest and principal payments on each Mortgage Loan received
before the Cut-off Date for installments of interest and principal due after the
Cut-off Date but not including payments of principal and interest due by the
Cut-off Date. By the Closing Date, the Seller shall deliver to the Depositor or,
at the Depositor's direction, to the Trustee or other designee of the Depositor,
the Mortgage File for each Mortgage Loan listed in the Mortgage Loan Schedule
(except that, in the case of Mortgage Loans that are Delay Delivery Mortgage
Loans, such delivery may take place within five Business Days of the Closing
Date) as of the Closing Date. The delivery of the Mortgage Files shall be made
against payment by the Depositor of the purchase price, previously agreed to by
the Seller and Depositor, for the Mortgage Loans. With respect to any Mortgage
Loan that does not have a first payment date on or before the Due Date in the
month of the first Distribution Date, the Seller shall deposit into the
Distribution Account on the first Distribution Account Deposit Date an amount
equal to one month's interest at the related Adjusted Mortgage Rate on the
Cut-off Date Principal Balance of such Mortgage Loan. Also on the Closing Date
the Depositor shall deposit $200 into the Certificate Account for the benefit of
the Class P-1 and Class P-2 Certificates.

      (b) The Depositor, concurrently with the execution and delivery of this
Agreement, hereby transfers to the Trustee for the benefit of the
Certificateholders, without recourse, all the interest of the Depositor in the
Trust Fund, together with the Depositor's right to require the Seller to cure
any breach of a representation or warranty made in this Agreement by the Seller
or to repurchase or substitute for any affected Mortgage Loan in accordance with
this Agreement.

      (c) In connection with the transfer and assignment of each Mortgage Loan,
the Depositor has delivered (or, in the case of the Delay Delivery Mortgage
Loans, will deliver to the Trustee within the time periods specified in the
definition of Delay Delivery Mortgage Loans), for the benefit of the
Certificateholders the following documents or instruments with respect to each
Mortgage Loan so assigned:

                  (i) The original Mortgage Note, endorsed by manual or
            facsimile signature in blank in the following form: "Pay to the
            order of _______________ ______________without recourse," with all
            intervening endorsements showing a complete chain of endorsement
            from the originator to the Person endorsing the Mortgage Note (each
            endorsement being sufficient to transfer all interest of the party
            so endorsing, as noteholder or assignee thereof, in that Mortgage
            Note) or a lost note affidavit for any Lost Mortgage Note from the
            Seller stating that the original Mortgage Note was lost or
            destroyed, together with a copy of the Mortgage Note.

                  (ii) Except as provided below and for each Mortgage Loan that
            is not a MERS Mortgage Loan, the original recorded Mortgage or a
            copy of such Mortgage certified by the Seller as being a true and
            complete copy of the Mortgage (or, in the case of a Mortgage for
            which the related Mortgaged Property is located in the Commonwealth
            of Puerto Rico, a true copy of the Mortgage certified as such by the
            applicable notary) and in the case of 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


                                       42
<PAGE>


            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, or a copy of the Mortgage certified
             by the public recording office in which such Mortgage has been
            recorded;

                  (iii) In the case of a Mortgage Loan that is not a MERS
            Mortgage Loan, a duly executed assignment of the Mortgage (which may
             be included in a blanket assignment or assignments), together with,
            except as provided below, all interim recorded assignments of the
            mortgage (each assignment, when duly and validly completed, to be in
            recordable form and sufficient to effect the assignment of and
            transfer to its assignee of the Mortgage to which the assignment
            relates). If the related Mortgage has not been returned from the
            applicable public recording office, the assignment of the Mortgage
            may exclude the information to be provided by the recording office.
            The assignment of Mortgage need not be delivered in the case of a
            Mortgage for which the related Mortgage Property is located in the
            Commonwealth of Puerto Rico.

                  (iv) The original or copies of each assumption, modification,
            written assurance, or substitution agreement.

                  (v) Except as provided below, the original or duplicate
            original lender's title policy and all its riders.

                  (vi) The originals of the following documents for each
            Cooperative Loan:

                        (A)    the Co-op Shares, together with a stock power in
                               blank;

                        (B)    the executed Security Agreement;

                        (C)    the executed Proprietary Lease;

                        (D)    the executed Recognition Agreement;

                        (E)    the executed UCC-1 financing statement that has
                              been filed in all places required to perfect the
                              Seller's interest in the Co-op Shares and the
                              Proprietary Lease with evidence of recording on
                              it; and

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

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


                                        43
<PAGE>


      In the event that in connection with any Mortgage Loan that is not a MERS
Mortgage Loan the Depositor cannot deliver (a) the original recorded Mortgage,
(b) all interim recorded assignments or (c) the lender's title policy (together
with all riders thereto) satisfying the requirements of clause (ii), (iii) or
(v) above, respectively, concurrently with the execution and delivery of this
Agreement because such document or documents have not been returned from the
applicable public recording office in the case of clause (ii) or (iii) above, or
because the title policy has not been delivered to either the Servicer or the
Depositor by the applicable title insurer in the case of clause (v) above, then
the Depositor shall promptly deliver to the Trustee, in the case of clause (ii)
or (iii) above, the original Mortgage or the interim assignment, as the case may
be, with evidence of recording indicated on when it is received from the public
recording office, or a copy of it, certified, if appropriate, by the relevant
recording office and in the case of clause (v) above, the original or a copy of
a written commitment or interim binder or preliminary report of title issued by
the title insurance or escrow company, with the original or duplicate copy
thereof to be delivered to the Trustee upon receipt thereof. The delivery of the
original Mortgage Loan and each interim assignment or a copy of them, certified,
if appropriate, by the relevant recording office, shall not be made later than
one year following the Closing Date, or, in the case of clause (v) above, later
than 120 days following the Closing Date. If the Depositor is unable to deliver
each Mortgage by that date and each interim assignment because any documents
have not been returned by the appropriate recording office, or, in the case of
each interim assignment, because the related Mortgage has not been returned by
the appropriate recording office, the Depositor shall deliver the documents to
the Trustee as promptly as possible upon their receipt and, in any event, within
720 days following the Closing Date.

      The Depositor shall forward to the Trustee (a) from time to time
additional original documents evidencing an assumption or modification of a
Mortgage Loan and (b) any other documents required to be delivered by the
Depositor or the Servicer to the Trustee. If the original Mortgage is not
delivered and in connection with the payment in full of the related Mortgage
Loan the public recording office requires the presentation of a "lost
instruments affidavit and indemnity" or any equivalent document, because only a
copy of the Mortgage can be delivered with the instrument of satisfaction or
reconveyance, the Servicer shall execute and deliver the required document to
the public recording office. If a public recording office retains the original
recorded Mortgage or if a Mortgage is lost after recordation in a public
recording office, the Seller shall deliver to the Trustee a copy of the Mortgage
certified by the public recording office to be a true and complete copy of the
original recorded Mortgage.

      As promptly as practicable after any transfer of a Mortgage Loan under
this Agreement, and in any event within thirty days after the transfer, the
Trustee shall (i) affix the Trustee's name to each assignment of Mortgage, as
its assignee, and (ii) cause to be delivered for recording in the appropriate
public office for real property records the assignments of the Mortgages to the
Trustee, except that, if the Trustee has not received the information required
to deliver any assignment of a Mortgage for recording, the Trustee shall deliver
it as soon as practicable after receipt of the needed information and in any
event within thirty days.

      The Trustee need not record any assignment that relates to a Mortgage Loan
(a) the Mortgaged Property and Mortgage File relating to which are located in
California or (b) in any other jurisdiction (including Puerto Rico) under the
laws of which, as evidenced by an Opinion of Counsel delivered by the Seller (at
the Seller's expense) to the Trustee, recording the assignment is not necessary
to protect the Trustee's and the Certificateholders' interest in the related
Mortgage Loan. The Seller shall deliver such Opinion of Counsel within 90 days
of the Closing Date.

      If any Mortgage Loans have been prepaid in full as of the Closing Date,
the Depositor, in lieu of delivering the above documents to the Trustee, will
deposit in the Certificate Account the portion of the prepayment that is
required to be deposited in the Certificate Account pursuant to Section 3.06.


                                       44
<PAGE>


      Notwithstanding anything to the contrary in this Agreement, within five
Business Days after the Closing Date, the Seller shall either

            (x) deliver to the Trustee the Mortgage File as required pursuant to
            this Section 2.01 for each Delay Delivery Mortgage Loan or

            (y) (A) repurchase the Delay Delivery Mortgage Loan or (B)
            substitute the Substitute Mortgage Loan for a Delay Delivery
            Mortgage Loan, which repurchase or substitution shall be
            accomplished in the manner and subject to the conditions in Section
            2.03 (treating each such Delay Delivery Mortgage Loan as a Deleted
            Mortgage Loan for purposes of such Section 2.03);

provided, however, that if the Seller fails to deliver a Mortgage File for any
Delay Delivery Mortgage Loan within the period specified herein, the Seller
shall use its best reasonable efforts to effect a substitution, rather than a
repurchase of, such Deleted Mortgage Loan and provided further that the cure
period provided for in Section 2.02 or in Section 2.03 shall not apply to the
initial delivery of the Mortgage File for such Delay Delivery Mortgage Loan, but
rather the Seller shall have five (5) Business Days to cure such failure to
deliver. At the end of such period, the Trustee shall send a Delay Delivery
Certification for the Delay Delivery Mortgage Loans delivered during such period
in accordance with the provisions of Section 2.02.

      (d) Notwithstanding the foregoing, however, for administrative convenience
and facilitation of servicing and to reduce closing costs, the assignments of
Mortgage shall not be required to be submitted for recording (except with
respect to any Mortgage Loan located in Maryland) unless such failure to record
would, as certified to the Trustee in writing by the Servicer, result in a
withdrawal or a downgrading by any Rating Agency of the rating on any Class of
Certificates; provided, however, that each assignment of Mortgage shall be
submitted for recording by the Seller (at the direction of the Servicer) in
the manner described above, at no expense to the Trust Fund or the Trustee,
upon the earliest to occur of: (i) reasonable direction by the Holders of
Certificates entitled to at least 25% of the Voting Rights, (ii) the
occurrence of a bankruptcy, insolvency or foreclosure relating to the Seller,
(iii) the occurrence of a servicing transfer as described in Section 7.02
hereof and (iv) if the Seller is not the Servicer and with respect to any one
assignment or Mortgage, the occurrence of a bankruptcy, insolvency or
foreclosure relating to the Mortgagor under the related Mortgage.
Notwithstanding the foregoing, if the Servicer is unable to pay the cost of
recording the assignments of Mortgage, such expense shall be paid by the
Trustee and shall be reimbursable out of the Distribution Account.

      (e) The Seller agrees to treat the transfer of the Mortgage Loans to the
Depositor as a sale for all tax, accounting, and regulatory purposes.

      (f) The Trust Fund does not intend to acquire or hold any Mortgage Loan
that would violate the representations made by the Seller set forth in clause
(27) of Schedule III.

      Section 2.02 Acceptance by the Trustee of the Mortgage Loans.

      The Trustee acknowledges receipt of the documents identified in the
Initial Certification in the form of Exhibit G-1, and declares that it holds and
will hold such documents and the other documents delivered to it constituting
the Mortgage Files for the Mortgage Loans, and that it holds or will hold such
other assets as are included in the Trust Fund, in trust for the exclusive use
and benefit of all present and future Certificateholders.


                                       45
<PAGE>


      The Trustee acknowledges that it will maintain possession of the related
Mortgage Notes in the State of California, unless otherwise permitted by the
Rating Agencies. The Trustee agrees to execute and deliver on the Closing Date
to the Depositor, the Servicer and the Seller an Initial Certification in the
form of Exhibit G-1. Based on its review and examination, and only as to the
documents identified in such Initial Certification, the Trustee acknowledges
that such documents appear regular on their face and relate to such Mortgage
Loans. The Trustee shall be under no duty or obligation to inspect, review or
examine said documents, instruments, certificates or other papers to determine
that the same are genuine, enforceable or appropriate for the represented
purpose or that they have actually been recorded in the real estate records or
that they are other than what they purport to be on their face.

      By the thirtieth day after the Closing Date (or if that day is not a
Business Day, the succeeding Business Day), the Trustee shall deliver to the
Depositor, the Servicer, and the Seller a Delay Delivery Certification with
respect to the Mortgage Loans substantially in the form of Exhibit G-2, with any
applicable exceptions noted thereon.

      By the ninetieth day after the Closing Date (or if that day is not a
Business Day, the succeeding Business Day), the Trustee shall deliver to the
Depositor, the Servicer and the Seller a Final Certification with respect to the
Mortgage Loans in the form of Exhibit H, with any applicable exceptions noted
thereon.

      If, in the course of its review, the Trustee finds any document
constituting a part of a Mortgage File that does not meet the requirements of
Section 2.01, the Trustee shall list such as an exception in the Final
Certification. The Trustee shall not make any determination as to whether (i)
any endorsement is sufficient to transfer all interest of the party so
endorsing, as noteholder or assignee thereof, in that Mortgage Note or (ii) any
assignment is in recordable form or is sufficient to effect the assignment of
and transfer to the assignee thereof under the mortgage to which the assignment
relates. The Seller shall promptly correct any defect that materially and
adversely affects the interests of the Certificateholders within 90 days from
the date it was so notified of the defect and, if the Seller does not correct
the defect within that period, the Seller shall either (a) substitute for the
related Mortgage Loan a Substitute Mortgage Loan, which substitution shall be
accomplished in the pursuant Section 2.03, or (b) purchase the Mortgage Loan at
its Purchase Price from the Trustee within 90 days from the date the Seller was
notified of the defect in writing.

      If a substitution or purchase of a Mortgage Loan pursuant to this
provision is required because of a delay in delivery of any documents by the
appropriate recording office, or there is a dispute between either the Servicer
or the Seller and the Trustee over the location or status of the recorded
document, then the substitution or purchase shall occur within 720 days from the
Closing Date. In no other case may a substitution or purchase occur more than
540 days from the Closing Date.

      Any substitution shall not be effected before the delivery to the Trustee
of the Opinion of Counsel, if required by Section 2.05, and any substitution
shall not be effected before the additional delivery to the Trustee of a Request
for Release substantially in the form of Exhibit N. No substitution is permitted
to be made in any calendar month after the Determination Date for the month.

      The Purchase Price for any Mortgage Loan shall be deposited by the Seller
in the Certificate Account by the Distribution Account Deposit Date for the
Distribution Date in the month following the month of repurchase and, upon
receipt of the deposit and certification with respect thereto in the form of
Exhibit N, the Trustee shall release the related Mortgage File to the Seller and
shall execute and deliver at the Seller's request any instruments of transfer or
assignment prepared by the Seller, in each case without recourse, necessary to
vest in the Seller, or a designee, the Trustee's interest in any Mortgage Loan
released pursuant hereto.


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<PAGE>


      If pursuant to the foregoing provisions the Seller repurchases a Mortgage
Loan that is a MERS Mortgage Loan, the Servicer shall either (i) cause MERS to
execute and deliver an assignment of the Mortgage in recordable form to transfer
the Mortgage from MERS to the Seller and shall cause such Mortgage to be removed
from registration on the MERS(R) System in accordance with MERS' rules and
regulations or (ii) cause MERS to designate on the MERS(R) System the Seller as
the beneficial holder of such Mortgage Loan.

      The Trustee shall retain possession and custody of each Mortgage File in
accordance with and subject to the terms and conditions set forth herein. The
Servicer shall promptly deliver to the Trustee, upon the execution or receipt
thereof, the originals of any other documents or instruments constituting the
Mortgage File that come into the possession of the Servicer from time to time.

      The obligation of the Seller to substitute for or to purchase any Mortgage
Loan that does not meet the requirements of Section 2.01 shall constitute the
sole remedy respecting the defect available to the Trustee, the Depositor, and
any Certificateholder against the Seller.

      Section 2.03 Representations, Warranties, and Covenants of the Seller and
the Servicer.

      (a) IndyMac, in its capacities as Seller and Servicer, makes the
representations and warranties in Schedule II, and by this reference
incorporated in this Agreement, to the Depositor and the Trustee, as of the
Closing Date.

      (b) The Seller, in its capacity as Seller, makes the representations and
warranties in Schedule III, and by this reference incorporated in this
Agreement, to the Depositor and the Trustee, as of the Closing Date, or if so
specified in Schedule III, as of the Cut-off Date.

      (c) Upon discovery by any of the parties hereto of a breach of a
representation or warranty made pursuant to Section 2.03(b) that materially and
adversely affects the interests of the Certificateholders in any Mortgage Loan,
the party discovering such breach shall give prompt notice thereof to the other
parties. Any breach of representations and warranties under clauses (27) and
(32) of Schedule III shall be deemed to affect materially and adversely the
interests of the Certificateholders in the affected Mortgage Loans. The Seller
covenants that within 90 days of the earlier of its discovery or its receipt of
written notice from any party of a breach of any representation or warranty made
pursuant to Section 2.03(b) which materially and adversely affects the interests
of the Certificateholders in any Mortgage Loan, it shall cure such breach in all
material respects, and if such breach is not so cured, shall, (i) if the 90-day
period expires before the second anniversary of the Closing Date, remove the
Mortgage Loan (a "Deleted Mortgage Loan") from the Trust Fund and substitute in
its place a Substitute Mortgage Loan, in accordance with this Section 2.03; or
(ii) repurchase the affected Mortgage Loan or Mortgage Loans from the Trustee at
the Purchase Price in the manner set forth below. Any substitution pursuant to
(i) above shall not be effected before the delivery to the Trustee of the
Opinion of Counsel, if required by Section 2.05, and a Request for Release
substantially in the form of Exhibit N, and the Mortgage File for any Substitute
Mortgage Loan. The Seller shall promptly reimburse the Servicer and the Trustee
for any expenses reasonably incurred by the Servicer or the Trustee in respect
of enforcing the remedies for the breach.

      With respect to any Substitute Mortgage Loan or Loans, the Seller shall
deliver to the Trustee for the benefit of the Certificateholders the Mortgage
Note, the Mortgage, the related assignment of the Mortgage, and such other
documents and agreements as are required by Section 2.01, with the Mortgage Note
endorsed and the Mortgage assigned as required by Section 2.01. No substitution
is permitted to be made in any calendar month after the Determination Date for
such month. Scheduled Payments due with respect to Substitute Mortgage Loans in
the month of substitution shall not be part of the Trust Fund and


                                       47
<PAGE>


will be retained by the Seller on the next succeeding Distribution Date. For the
month of substitution, distributions to Certificateholders will include the
monthly payment due on any Deleted Mortgage Loan for such month and thereafter
the Seller shall be entitled to retain all amounts received in respect of such
Deleted Mortgage Loan.

      The Servicer shall amend the Mortgage Loan Schedule for the benefit of the
Certificateholders to reflect the removal of the Deleted Mortgage Loan and the
substitution of the Substitute Mortgage Loans and the Servicer shall deliver the
amended Mortgage Loan Schedule to the Trustee. Upon the substitution, the
Substitute Mortgage Loans shall be subject to this Agreement in all respects,
and the Seller shall be deemed to have made with respect to the Substitute
Mortgage Loans, as of the date of substitution, the representations and
warranties made pursuant to Section 2.03(b) with respect to the Mortgage Loan.
Upon any substitution and the deposit to the Certificate Account of the amount
required to be deposited therein in connection with the substitution as
described in the following paragraph, the Trustee shall release the Mortgage
File held for the benefit of the Certificateholders relating to the Deleted
Mortgage Loan to the Seller and shall execute and deliver at the Seller's
direction such instruments of transfer or assignment prepared by the Seller, in
each case without recourse, as shall be necessary to vest title in the Seller,
or its designee, the Trustee's interest in any Deleted Mortgage Loan substituted
for pursuant to this Section 2.03.

      For any month in which the Seller substitutes one or more Substitute
Mortgage Loans for one or more Deleted Mortgage Loans, the Servicer will
determine the amount (if any) by which the aggregate principal balance of all
such Substitute Mortgage Loans as of the date of substitution is less than the
aggregate Stated Principal Balance of all such Deleted Mortgage Loans (after
application of the scheduled principal portion of the monthly payments due in
the month of substitution). The amount of such shortage (the "Substitution
Adjustment Amount") plus, if the Seller is not the Servicer, an amount equal to
the aggregate of any unreimbursed Advances and Servicer Advances with respect to
such Deleted Mortgage Loans shall be deposited into the Certificate Account by
the Seller by the Distribution Account Deposit Date for the Distribution Date in
the month succeeding the calendar month during which the related Mortgage Loan
became required to be purchased or replaced hereunder. If the Seller repurchases
a Mortgage Loan, the Purchase Price therefor shall be deposited in the
Certificate Account pursuant to Section 3.06 by the Distribution Account Deposit
Date for the Distribution Date in the month following the month during which the
Seller became obligated hereunder to repurchase or replace the Mortgage Loan and
upon such deposit of the Purchase Price and receipt of a Request for Release in
the form of Exhibit N, the Trustee shall release the related Mortgage File held
for the benefit of the Certificateholders to such Person, and the Trustee shall
execute and deliver at such Person's direction such instruments of transfer or
assignment prepared by such Person, in each case without recourse, as shall be
necessary to transfer title from the Trustee. The obligation under this
Agreement of any Person to cure, repurchase, or replace any Mortgage Loan as to
which a breach has occurred and is continuing shall constitute the sole remedy
against the Person respecting the breach available to Certificateholders, the
Depositor, or the Trustee on their behalf.

      The representations and warranties made pursuant to this Section 2.03
shall survive delivery of the respective Mortgage Files to the Trustee for the
benefit of the Certificateholders and shall not be waived by the Depositor.

      The Seller assigns to the Depositor and the Depositor assigns to the
Trustee all rights the Seller might have under contracts with third parties
relating to early payment defaults on the Mortgage Loans ("EPD Rights") and the
Servicer assumes any related duties as part of its servicing obligations.
Consistent with the Servicing Standard, the Servicer shall attempt to enforce
the EPD rights. If the Servicer's enforcement of the EPD Rights obligates the
Servicer to sell a Mortgage Loan to a third party, the Servicer shall repurchase
the Mortgage Loan at the Purchase Price and sell the Mortgage Loan to the


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<PAGE>


third party, provided however, in no case shall the Servicer be obligated to
repurchase a Mortgage Loan on account of EPD Rights unless and until the
Servicer shall have previously received repurchase payment from a third party.
The Servicer shall deposit into the Certificate Account all amounts received in
connection with the enforcement of EPD Rights, not exceeding the Purchase Price,
with respect to any Mortgage Loan. Any amounts received by the Servicer with
respect a Mortgage Loan in excess of the Purchase Price shall be retained by the
Servicer as additional servicing compensation. The Trustee, upon receipt of
certification from the Servicer of the deposit of the Purchase Price in
connection with a repurchase of a Mortgage Loan and a Request for File Release
from the Servicer, shall release or cause to be released to the purchaser of
such Mortgage Loan the related Mortgage File and shall execute and deliver such
instruments of transfer or assignment prepared by the purchaser of such Mortgage
Loan, in each case without recourse, as shall be necessary to vest in the
purchaser of such Mortgage Loan any Mortgage Loan released pursuant hereto and
the purchaser of such Mortgage Loan shall succeed to all the Trustee's right,
title and interest in and to such Mortgage Loan and all security and documents
related thereto. Such assignment shall be an assignment outright and not for
security. The purchaser of such Mortgage Loan shall thereupon own such Mortgage
Loan, and all security and documents, free of any further obligation to the
Trustee or the Certificateholders with respect thereto.

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

      The Depositor represents and warrants to the Trustee with respect to each
Mortgage Loan as of the date of this Agreement or such other date set forth in
this Agreement that as of the Closing Date, and following the transfer of the
Mortgage Loans to it by the Seller, the Depositor had good title to the Mortgage
Loans and the Mortgage Notes were subject to no offsets, defenses, or
counterclaims.

      The representations and warranties in this Section 2.04 shall survive
delivery of the Mortgage Files to the Trustee. Upon discovery by the Depositor
or the Trustee of any breach of any of the representations and warranties in
this Section that materially and adversely affects the interest of the
Certificateholders, the party discovering the breach shall give prompt written
notice to the others and to each Rating Agency.

      Section 2.05 Delivery of Opinion of Counsel in Connection with
Substitutions.

      (a) Notwithstanding any contrary provision of this Agreement, no
substitution pursuant to Section 2.02 or 2.03 shall be made more than 90 days
after the Closing Date unless the Seller delivers to the Trustee an Opinion of
Counsel, which Opinion of Counsel shall not be at the expense of either the
Trustee or the Trust Fund, addressed to the Trustee, to the effect that such
substitution will not (i) result in the imposition of the tax on "prohibited
transactions" on the Trust Fund or contributions after the Startup Date, as
defined in sections 860F(a)(2) and 860G(d) of the Code, respectively or (ii)
cause any REMIC created under this Agreement to fail to qualify as a REMIC at
any time that any Certificates are outstanding.

      (b) Upon discovery by the Depositor, the Seller, the Servicer 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 promptly (and in any event within five Business Days of discovery) give
written notice thereof to the other parties. In connection therewith, the
Trustee shall require the Seller, at the Seller's option, to either (i)
substitute, if the conditions in Section 2.03(c) with respect to substitutions
are satisfied, a Substitute Mortgage Loan for the affected Mortgage Loan, or
(ii) repurchase the affected Mortgage Loan within 90 days of such discovery in
the same manner as it would a Mortgage Loan for a breach of representation or
warranty made pursuant to Section 2.03. The Trustee shall reconvey to the Seller
the Mortgage Loan to be released pursuant hereto in the same manner, and on the


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<PAGE>


same terms and conditions, as it would a Mortgage Loan repurchased for breach of
a representation or warranty contained in Section 2.03.

      Section 2.06 Execution and Delivery of Certificates.

      The Trustee acknowledges the transfer and assignment to it of the Trust
Fund and, concurrently with such transfer and assignment, has executed and
delivered to or upon the order of the Depositor, the Certificates in authorized
denominations evidencing directly or indirectly the entire ownership of the
Trust Fund. The Trustee agrees to hold the Trust Fund and exercise the rights
referred to above for the benefit of all present and future Holders of the
Certificates.

      Section 2.07 REMIC Matters.

      The Preliminary Statement sets forth the designations and "latest possible
maturity date" for federal income tax purposes of all interests created under
this Agreement. The "Startup Day" for purposes of the REMIC Provisions shall be
the Closing Date. Each REMIC's fiscal year shall be the calendar year.


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<PAGE>


                                 ARTICLE THREE

                 ADMINISTRATION AND SERVICING OF MORTGAGE LOANS

      Section 3.01 Servicer to Service Mortgage Loans.

      For and on behalf of the Certificateholders, the Servicer shall service
and administer the Mortgage Loans in accordance with this Agreement and the
Servicing Standard.

      The Servicer shall not make or permit any modification, waiver, or
amendment of any term of any Mortgage Loan that would cause any REMIC created
under this Agreement to fail to qualify as a REMIC or result in the imposition
of any tax under section 860F(a) or section 860G(d) of the Code.

      Without limiting the generality of the foregoing, the Servicer, in its own
name or in the name of the Depositor and the Trustee, is hereby authorized and
empowered by the Depositor and the Trustee, when the Servicer believes it
appropriate in its reasonable judgment, to execute and deliver, on behalf of the
Trustee, the Depositor, the Certificateholders, or any of them, any instruments
of satisfaction or cancellation, or of partial or full release or discharge, and
all other comparable instruments, with respect to the Mortgage Loans, and with
respect to the Mortgaged Properties held for the benefit of the
Certificateholders. The Servicer shall prepare and deliver to the Depositor or
the Trustee any documents requiring execution and delivery by either or both of
them appropriate to enable the Servicer to service and administer the Mortgage
Loans to the extent that the Servicer is not permitted to execute and deliver
such documents pursuant to the preceding sentence. Upon receipt of the
documents, the Depositor or the Trustee shall execute the documents and deliver
them to the Servicer.

       The Servicer further is authorized and empowered by the Trustee, on behalf
of the Certificateholders and the Trustee, in its own name, when the Servicer
believes it appropriate in its best judgment to register any Mortgage Loan on
the MERS(R) System, or cause the removal from the registration of any Mortgage
Loan on the MERS(R) System, to execute and deliver, on behalf of the Trustee and
the Certificateholders or any of them, any and all instruments of assignment and
other comparable instruments with respect to such assignment or re-recording of
a Mortgage in the name of MERS, solely as nominee for the Trustee and its
successors and assigns.

      In accordance with and to the extent of the Servicing Standard, the
Servicer shall advance funds necessary to effect the payment of taxes and
assessments on the Mortgaged Properties, which advances shall be reimbursable in
the first instance from related collections from the Mortgagors pursuant to
Section 3.07, and further as provided in Section 3.09. The costs incurred by the
Servicer in effecting the timely payments of taxes and assessments on the
Mortgaged Properties and related insurance premiums shall not, for the purpose
of calculating monthly distributions to the Certificateholders, be added to the
Stated Principal Balances of the related Mortgage Loans, notwithstanding that
the Mortgage Loans so permit.

      Nothing in this Agreement to the contrary shall limit the Servicer from
undertaking any legal action that it may deem appropriate with respect to the
Mortgage Loans including, without limitation, any rights or causes of action
arising out of the origination of the Mortgage Loans.


                                       51
<PAGE>


      Section 3.02 [Reserved].

      Section 3.03 Rights of the Depositor and the Trustee in Respect of the
Servicer.

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

      Section 3.04 [Reserved].

      Section 3.05 Trustee to Act as Servicer.

      If the Servicer for any reason is no longer the Servicer under this
Agreement (including because of the occurrence or existence of an Event of
Default or termination by the Depositor), the Trustee or its successor shall
assume all of the rights and obligations of the Servicer under this Agreement
arising thereafter (except that the Trustee shall not be

            (i) liable for losses of the Servicer pursuant to Section 3.10 or
      any acts or omissions of the predecessor Servicer hereunder,

            (ii) obligated to make Advances if it is prohibited from doing so by
      applicable law,

            (iii) obligated to effectuate repurchases or substitutions of
      Mortgage Loans hereunder, including repurchases or substitutions pursuant
      to Section 2.02 or 2.03,

            (iv) responsible for expenses of the Servicer pursuant to Section
      2.03, or

            (v) deemed to have made any representations and warranties of the
      Servicer hereunder). Any assumption shall be subject to Section 7.02.

      Notwithstanding anything else in this Agreement to the contrary, in no
event shall the Trustee be liable for any servicing fee or for any differential
in the amount of the Servicing Fee paid under this Agreement and the amount
necessary to induce any successor Servicer to act as successor Servicer under
this Agreement and the transactions provided for in this Agreement.

      Section 3.06 Collection of Mortgage Loan Payments; Certificate Account;
Distribution Account.

      (a) In accordance with and to the extent of the Servicing Standard, the
Servicer shall make reasonable efforts in accordance with the customary and
usual standards of practice of prudent mortgage servicers to collect all
payments called for under the Mortgage Loans to the extent the procedures are
consistent with this Agreement and any related Required Insurance Policy.
Consistent with the foregoing, the Servicer may in its discretion (i) waive any
late payment charge or, subject to Section 3.20, any Prepayment Charge in
connection with the prepayment of a Mortgage Loan and (ii) extend the due dates
for payments due on a Delinquent Mortgage Loan for a period not greater than 125
days. In connection with a seriously delinquent or defaulted Mortgage Loan, the
Servicer may, consistent with the Servicing


                                       52
<PAGE>


Standard, waive, modify or vary any term of that Mortgage Loan (including
modifications that change the Mortgage Rate, forgive the payment of principal or
interest or extend the final maturity date of that Mortgage Loan ), accept
payment from the related Mortgagor of an amount less than the Stated Principal
Balance in final satisfaction of that Mortgage Loan, or consent to the
postponement of strict compliance with any such term or otherwise grant
indulgence to any Mortgagor if in the Servicer's determination such waiver,
modification, postponement or indulgence is not materially adverse to the
interests of the Certificateholders (taking into account any estimated loss that
might result absent such action) and is expected to minimize the loss on such
Mortgage Loan; provided, however, the Servicer shall not initiate new lending to
such Mortgagor through the Trust and cannot, except as provided in the
immediately succeeding sentence, extend the maturity of any Mortgage Loan past
the date on which the final payment is due on the latest maturing Mortgage Loan
as of the Cut-off Date. With respect to no more than 5% of the Mortgage Loans
(measured by aggregate Cut-off Date Principal Balance of the Mortgage Loans),
the Servicer may extend the maturity of a Mortgage Loan past the date on which
the final payment is due on the latest maturing Mortgage Loan as of the Cut-off
Date, but in no event more than one year past such date. In the event of any
such arrangement, the Servicer shall make Advances on the related Mortgage Loan
in accordance with Section 4.01 during the scheduled period in accordance with
the amortization schedule of the Mortgage Loan without modification thereof
because of the arrangements. The Servicer shall not be required to institute or
join in litigation with respect to collection of any payment (whether under a
Mortgage, Mortgage Note, or otherwise or against any public or governmental
authority with respect to a taking or condemnation) if it reasonably believes
that enforcing the provision of the Mortgage or other instrument pursuant to
which the payment is required is prohibited by applicable law. The Servicer
shall not have the discretion to sell any Delinquent or defaulted Mortgage Loan.

      (b) [Reserved.]

      (c) [Reserved.]

      (d) The Servicer shall establish and maintain a Certificate Account into
which the Servicer shall deposit on a daily basis (i) within two Business Days
of receipt (in the case of items (i) through (iii) below) and (2) within one
Business Day of receipt (in the case of all other items), except as otherwise
specified herein, the following payments and collections received by it in
respect of Mortgage Loans after the Cut-off Date (other than in respect of
principal and interest due on the Mortgage Loans by the Cut-off Date) and the
following amounts required to be deposited hereunder:

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

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

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

            (iv) any amount required to be deposited by the Servicer pursuant to
      Section 3.06(f) in connection with any losses on Permitted Investments;

            (v) any amounts required to be deposited by the Servicer pursuant to
      Sections 3.10 and 3.12;


                                       53
<PAGE>


            (vi) all Purchase Prices from the Servicer or Seller and all
      Substitution Adjustment Amounts;

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

            (viii) any other amounts required to be deposited under this
      Agreement; and

            (ix) all Prepayment Charges collected.

      In addition, with respect to any Mortgage Loan that is subject to a
buydown agreement, on each Due Date for the Mortgage Loan, in addition to the
monthly payment remitted by the Mortgagor, the Servicer shall cause funds to be
deposited into the Certificate Account in an amount required to cause an amount
of interest to be paid with respect to the Mortgage Loan equal to the amount of
interest that has accrued on the Mortgage Loan from the preceding Due Date at
the Mortgage Rate net of the Servicing Fee Rate on that date.

      The foregoing requirements for remittance by the Servicer shall be
exclusive, it being understood and agreed that, without limiting the generality
of the foregoing, payments in the nature of late payment charges or assumption
fees, if collected, need not be remitted by the Servicer. If the Servicer remits
any amount not required to be remitted, it may at any time withdraw that amount
from the Certificate Account, any provision in this Agreement to the contrary
notwithstanding. The withdrawal or direction may be accomplished by delivering
written notice of it to the Trustee or any other institution maintaining the
Certificate Account that describes the amounts deposited in error in the
Certificate Account. The Servicer shall maintain adequate records with respect
to all withdrawals made pursuant to this Section 3.06. All funds deposited in
the Certificate Account shall be held in trust for the Certificateholders until
withdrawn in accordance with Section 3.09.

      (e) The Trustee shall establish and maintain the Distribution Account on
behalf of the Certificateholders. The Trustee shall, promptly upon receipt,
deposit in the Distribution Account and retain in the Distribution Account the
following:

            (i) the aggregate amount remitted by the Servicer to the Trustee
      pursuant to Section 3.09(a);

            (ii) any amount deposited by the Servicer pursuant to Section
      3.06(f) in connection with any losses on Permitted Investments; and

            (iii) any other amounts deposited under this Agreement that are
      required to be deposited in the Distribution Account.

      If the Servicer remits any amount not required to be remitted, it may at
any time direct the Trustee in writing to withdraw that amount from the
Distribution Account, any provision in this Agreement to the contrary
notwithstanding. The direction may be accomplished by delivering an Officer's
Certificate to the Trustee that describes the amounts deposited in error in the
Distribution Account. All funds deposited in the Distribution Account shall be
held by the Trustee in trust for the Certificateholders until disbursed in
accordance with this Agreement or withdrawn in accordance with Section 3.09. In
no event shall the Trustee incur liability for withdrawals from the Distribution
Account at the direction of the Servicer.

      (f) Each institution at which the Certificate Account is maintained shall
invest the funds in such account as directed in writing by the Servicer in
Permitted Investments, which shall mature not later than


                                       54
<PAGE>


the second Business Day preceding the related Distribution Account Deposit Date
(except that if the Permitted Investment is an obligation of the institution
that maintains the account, then the Permitted Investment shall mature not later
than the Business Day preceding the Distribution Account Deposit Date) and which
shall not be sold or disposed of before its maturity. The funds in the
Distribution Account shall remain uninvested. All such Permitted Investments
shall be made in the name of the Trustee, for the benefit of the
Certificateholders. All income realized from any such investment of funds on
deposit in the Certificate Account shall be for the benefit of the Servicer as
servicing compensation and shall be remitted to it monthly as provided in this
Agreement. The amount of any realized losses on Permitted Investments in the
Certificate Account shall promptly be deposited by the Servicer in the
Certificate Account. The Trustee shall not be liable for the amount of any loss
incurred in respect of any investment or lack of investment of funds held in the
Certificate Account and made in accordance with this Section 3.06.

      (g) The Servicer shall give notice to the Trustee, the Seller, each Rating
Agency and the Depositor of any proposed change of the location of the
Certificate Account not later than 30 days and not more than 45 days prior to
any change of this Agreement. The Trustee shall give notice to the Servicer, the
Seller, each Rating Agency and the Depositor of any proposed change of the
location of the Distribution Account not later than 30 days and not more than 45
days prior to any change of this Agreement.

      Section 3.07 Collection of Taxes, Assessments and Similar Items; Escrow
Accounts.

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

      (b) Withdrawals of amounts so collected from the Escrow Accounts may be
made only to effect timely payment of taxes, assessments, hazard insurance
premiums, condominium or PUD association dues, or comparable items, to reimburse
(without duplication) the Servicer out of related collections for any payments
made pursuant to Section 3.01 (with respect to taxes and assessments and
insurance premiums) and Section 3.10 (with respect to hazard insurance), to
refund to any Mortgagors any sums determined to be overages, to pay interest, if
required by law or the related Mortgage or Mortgage Note, to Mortgagors on
balances in the Escrow Account or to clear and terminate the Escrow Account at
the termination of this Agreement in accordance with Section 9.01. The Escrow
Accounts shall not be a part of the Trust Fund.

      (c) The Servicer shall advance any payments referred to in Section 3.07(a)
that are not timely paid by the Mortgagors or advanced by the Servicer on the
date when the tax, premium or other cost for which such payment is intended is
due, but the Servicer shall be required so to advance only to the extent that
such advances, in the good faith judgment of the Servicer, will be recoverable
by the Servicer out of Insurance Proceeds, Liquidation Proceeds or otherwise.

      Section 3.08 Access to Certain Documentation and Information Regarding the
Mortgage Loans.

      The Servicer shall afford the Depositor and the Trustee reasonable access
to all records and documentation regarding the Mortgage Loans and all accounts,
insurance information and other matters relating to this Agreement, such access
being afforded without charge, but only upon reasonable request and during
normal business hours at the office designated by the Servicer.


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      Upon reasonable advance notice in writing, the Servicer will provide to
each Certificateholder or Certificate Owner that is a savings and loan
association, bank, or insurance company certain reports and reasonable access to
information and documentation regarding the Mortgage Loans sufficient to permit
the Certificateholder or Certificate Owner to comply with applicable regulations
of the OTS or other regulatory authorities with respect to investment in the
Certificates. The Servicer shall be entitled to be reimbursed by each such
Certificateholder or Certificate Owner for actual expenses incurred by the
Servicer in providing the reports and access.

      Section 3.09 Permitted Withdrawals from the Certificate Account and the
Distribution Account.

      (a) The Servicer may (and, in the case of clause (ix) below, shall) from
time to time make withdrawals from the Certificate Account for the following
purposes:

             (i) to pay to the Servicer (to the extent not previously retained)
      the servicing compensation to which it is entitled pursuant to Section
      3.15, and to pay to the Servicer, as additional servicing compensation,
      earnings on or investment income with respect to funds in or credited to
      the Certificate Account;

            (ii) to reimburse the Servicer or successor Servicer for the
      unreimbursed Advances made by it, such right of reimbursement pursuant to
      this subclause (ii) being limited to amounts received on the Mortgage
      Loans in respect of which the Advance was made;

            (iii) to reimburse the Servicer or successor Servicer for any
      Nonrecoverable Advance previously made by it;

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

            (v) to reimburse the Servicer for (a) unreimbursed Servicing
      Advances, the Servicer's right to reimbursement pursuant to this clause
      (a) with respect to any Mortgage Loan being limited to amounts received on
      the Mortgage Loans that represent late recoveries of the payments for
      which the advances were made pursuant to Section 3.01 or Section 3.07, (b)
      unreimbursed Servicing Advances made in respect of a Mortgage Loan for
      which such Servicing Advances are not recoverable from the Mortgagor and
      (c) for unpaid Servicing Fees as provided in Section 3.12;

            (vi) to pay to the purchaser, with respect to each Mortgage Loan or
      property acquired in respect of such Mortgage Loan that has been purchased
      pursuant to Section 2.02, 2.03, or 3.12, all amounts received thereon
      after the date of such purchase;

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

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

            (ix) by the Distribution Account Deposit Date, to withdraw (1) the
      Available Funds and the Trustee Fee for the Distribution Date, to the
      extent on deposit, and (2) the Prepayment Charges on deposit, and remit
      such amount to the Trustee for deposit in the Distribution Account; and


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            (x) to clear and terminate the Certificate Account upon termination
      of this Agreement pursuant to Section 9.01.

       The Servicer shall keep and maintain separate accounting, on a Mortgage
Loan by Mortgage Loan basis, to justify any withdrawal from the Certificate
Account pursuant to subclauses (i), (ii), (iv), (v), and (vi). Before making any
withdrawal from the Certificate Account pursuant to subclause (iii), the
Servicer shall deliver to the Trustee an Officer's Certificate of a Servicing
Officer indicating the amount of any previous Advance determined by the Servicer
to be a Nonrecoverable Advance and identifying the related Mortgage Loans and
their respective portions of the Nonrecoverable Advance.

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

            (i) to pay to itself the Trustee Fee for the related Distribution
      Date;

            (ii) to withdraw and return to the Servicer any amount deposited in
      the Distribution Account and not required to be deposited therein; and

            (iii) to clear and terminate the Distribution Account upon
      termination of the Agreement pursuant to Section 9.01.

      Section 3.10 Maintenance of Hazard Insurance; Maintenance of Primary
Insurance Policies.

      (a) The Servicer shall maintain, for each Mortgage Loan, hazard insurance
with extended coverage in an amount that is at least equal to the lesser of

      (i) the maximum insurable value of the improvements securing the Mortgage
Loan and

      (ii) the greater of (y) the outstanding principal balance of the Mortgage
Loan and (z) an amount such that the proceeds of the policy are sufficient to
prevent the Mortgagor or the mortgagee from becoming a co-insurer.

      Each policy of standard hazard insurance shall contain, or have an
accompanying endorsement that contains, a standard mortgagee clause. Any amounts
collected under the policies (other than the amounts to be applied to the
restoration or repair of the related Mortgaged Property or amounts released to
the Mortgagor in accordance with the Servicer's normal servicing procedures)
shall be deposited in the Certificate Account. Any cost incurred in maintaining
any insurance shall not, for the purpose of calculating monthly distributions to
the Certificateholders or remittances to the Trustee for their benefit, be added
to the principal balance of the Mortgage Loan, notwithstanding that the Mortgage
Loan so permits. Such costs shall be recoverable by the Servicer out of late
payments by the related Mortgagor or out of Liquidation Proceeds to the extent
permitted by Section 3.09. No earthquake or other additional insurance is to be
required of any Mortgagor or maintained on property acquired in respect of a
Mortgage other than pursuant to any applicable laws and regulations in force
that require additional insurance. If the Mortgaged Property is located at the
time of origination of the Mortgage Loan in a federally designated special flood
hazard area and the area is participating in the national flood insurance
program, the Servicer shall maintain flood insurance for the Mortgage Loan. The
flood insurance shall be in an amount equal to the least of (i) the original
principal balance of the related Mortgage Loan, (ii) the


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replacement value of the improvements that are part of the Mortgaged Property,
and (iii) the maximum amount of flood insurance available for the related
Mortgaged Property under the national flood insurance program.

      If the Servicer obtains and maintains a blanket policy insuring against
hazard losses on all of the Mortgage Loans, it shall have satisfied its
obligations in the first sentence of this Section 3.10. The policy may contain a
deductible clause on terms substantially equivalent to those commercially
available and maintained by comparable servicers. If the policy contains a
deductible clause and a policy complying with the first sentence of this Section
3.10 has not been maintained on the related Mortgaged Property, and if a loss
that would have been covered by the required policy occurs, the Servicer shall
deposit in the Certificate Account, without any right of reimbursement, the
amount not otherwise payable under the blanket policy because of the deductible
clause. In connection with its activities as Servicer of the Mortgage Loans, the
Servicer agrees to present, on behalf of itself, the Depositor, and the Trustee
for the benefit of the Certificateholders, claims under any blanket policy.

      (b) The Servicer shall not take any action that would result in
non-coverage under any applicable Primary Insurance Policy of any loss that, but
for the actions of the Servicer, would have been covered thereunder. The
Servicer shall not cancel or refuse to renew any Primary Insurance Policy that
is in effect at the date of the initial issuance of the Certificates and is
required to be kept in force hereunder unless the replacement Primary Insurance
Policy for the canceled or non-renewed policy is maintained with a Qualified
Insurer. The Servicer need not maintain any Primary Insurance Policy if
maintaining the Primary Insurance Policy is prohibited by applicable law. The
Servicer agrees, to the extent permitted by applicable law, to effect the timely
payment of the premiums on each Primary Insurance Policy, and any costs not
otherwise recoverable shall be recoverable by the Servicer from the related
liquidation proceeds.

      In connection with its activities as Servicer of the Mortgage Loans, the
Servicer agrees to present, on behalf of itself, the Trustee and the
Certificateholders, claims to the insurer under any Primary Insurance Policies
and, in this regard, to take any reasonable action in accordance with the
Servicing Standard necessary to permit recovery under any Primary Insurance
Policies respecting defaulted Mortgage Loans. Any amounts collected by the
Servicer under any Primary Insurance Policies shall be deposited in the
Certificate Account.

      Section 3.11 Enforcement of Due-On-Sale Clauses; Assumption Agreements.

      (a) Except as otherwise provided in this Section 3.11, when any property
subject to a Mortgage has been conveyed by the Mortgagor, the Servicer shall to
the extent that it has knowledge of the conveyance and in accordance with the
Servicing Standard, enforce any due-on-sale clause contained in any Mortgage
Note or Mortgage, to the extent permitted under applicable law and governmental
regulations, but only to the extent that enforcement will not adversely affect
or jeopardize coverage under any Required Insurance Policy. Notwithstanding the
foregoing, the Servicer is not required to exercise these rights with respect to
a Mortgage Loan if the Person to whom the related Mortgaged Property has been
conveyed or is proposed to be conveyed satisfies the conditions contained in the
Mortgage Note and Mortgage related thereto and the consent of the mortgagee
under the Mortgage Note or Mortgage is not otherwise so required under the
Mortgage Note or Mortgage as a condition to the transfer.

      If (i) the Servicer is prohibited by law from enforcing any due-on-sale
clause, (ii) coverage under any Required Insurance Policy would be adversely
affected, (iii) the Mortgage Note does not include a due-on-sale clause, or (iv)
nonenforcement is otherwise permitted hereunder, the Servicer is authorized,
subject to Section 3.11(b), to take or enter into an assumption and modification
agreement from or with the person to whom the property has been or is about to
be conveyed, pursuant to which the person becomes liable under the Mortgage Note
and, unless prohibited by applicable state law, the Mortgagor


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remains liable thereon. The Mortgage Loan must continue to be covered (if so
covered before the Servicer enters into the agreement) by the applicable
Required Insurance Policies.

      The Servicer, subject to Section 3.11(b), is also authorized with the
prior approval of the insurers under any Required Insurance Policies to enter
into a substitution of liability agreement with the Person, pursuant to which
the original Mortgagor is released from liability and the Person is substituted
as Mortgagor and becomes liable under the Mortgage Note. Notwithstanding the
foregoing, the Servicer shall not be deemed to be in default under this Section
3.11 because of any transfer or assumption that the Servicer reasonably believes
it is restricted by law from preventing, for any reason whatsoever.

      (b) Subject to the Servicer's duty to enforce any due-on-sale clause to
the extent set forth in Section 3.11(a), in any case in which a Mortgaged
Property has been conveyed to a Person by a Mortgagor, and the Person is to
enter into an assumption agreement or modification agreement or supplement to
the Mortgage Note or Mortgage that requires the signature of the Trustee, or if
an instrument of release signed by the Trustee is required releasing the
Mortgagor from liability on the Mortgage Loan, the Servicer shall prepare and
deliver to the Trustee for signature and shall direct the Trustee, in writing,
to execute the assumption agreement with the Person to whom the Mortgaged
Property is to be conveyed, and the modification agreement or supplement to the
Mortgage Note or Mortgage or other instruments appropriate to carry out the
terms of the Mortgage Note or Mortgage or otherwise to comply with any
applicable laws regarding assumptions or the transfer of the Mortgaged Property
to the Person. In connection with any such assumption, no material term of the
Mortgage Note may be changed.

      In addition, the substitute Mortgagor and the Mortgaged Property must be
acceptable to the Servicer in accordance with its underwriting standards as then
in effect. Together with each substitution, assumption, or other agreement or
instrument delivered to the Trustee for execution by it, the Servicer shall
deliver an Officer's Certificate signed by a Servicing Officer stating that the
requirements of this subsection have been met in connection with such Officer's
Certificate. The Servicer shall notify the Trustee that any substitution or
assumption agreement has been completed by forwarding to the Trustee the
original of the substitution or assumption agreement, which in the case of the
original shall be added to the related Mortgage File and shall, for all
purposes, be considered a part of the Mortgage File to the same extent as all
other documents and instruments constituting a part of the Mortgage File. The
Servicer will retain any fee collected by it for entering into an assumption or
substitution of liability agreement as additional servicing compensation.

      Section 3.12 Realization Upon Defaulted Mortgage Loans.

      The Servicer shall use reasonable efforts in accordance with the Servicing
Standard to foreclose on or otherwise comparably convert the ownership of assets
securing such of the Mortgage Loans as come into and continue in default and as
to which no satisfactory arrangements can be made for collection of delinquent
payments. In connection with the foreclosure or other conversion, the Servicer
shall follow the Servicing Standard and shall follow the requirements of the
insurer under any Required Insurance Policy. The Servicer shall not be required
to expend its own funds in connection with any foreclosure or towards the
restoration of any property unless it determines (i) that the restoration or
foreclosure will increase the proceeds of liquidation of the Mortgage Loan after
reimbursement to itself of restoration expenses and (ii) that restoration
expenses will be recoverable to it through Liquidation Proceeds (respecting
which it shall have priority for purposes of withdrawals from the Certificate
Account). The Servicer shall be responsible for all other costs and expenses
incurred by it in any foreclosure proceedings. The Servicer is entitled to
reimbursement of such costs and expenses from the liquidation proceeds with
respect to the related Mortgaged Property, as provided in the definition of
Liquidation Proceeds. If the Servicer has knowledge that a Mortgaged Property
that the Servicer is contemplating


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acquiring in foreclosure or by deed in lieu of foreclosure is located within a
one mile radius of any site listed in the Expenditure Plan for the Hazardous
Substance Clean Up Bond Act of 1984 or other site with environmental or
hazardous waste risks known to the Servicer, the Servicer will, before acquiring
the Mortgaged Property, consider the risks and only take action in accordance
with its established environmental review procedures.

      With respect to any REO Property, the deed or certificate of sale shall be
taken in the name of the Trustee for the benefit of the Certificateholders, or
its nominee, on behalf of the Certificateholders. The Trustee's name shall be
placed on the title to the REO Property solely as the Trustee hereunder and not
in its individual capacity. The Servicer shall ensure that the title to the REO
Property references the Pooling and Servicing Agreement and the Trustee's
capacity hereunder. Pursuant to its efforts to sell the REO Property, the
Servicer shall either itself or through an agent selected by the Servicer
protect and conserve the REO Property in accordance with the Servicing Standard.

      The Servicer shall perform the tax reporting and withholding required by
sections 1445 and 6050J of the Code with respect to foreclosures and
abandonments, the tax reporting required by section 6050H of the Code with
respect to the receipt of mortgage interest from individuals and, if required by
section 6050P of the Code with respect to the cancellation of indebtedness by
certain financial entities, by preparing any required tax and information
returns, in the form required.

      If the Trust Fund acquires any Mortgaged Property as aforesaid or
otherwise in connection with a default or imminent default on a Mortgage Loan,
the REO Property shall only be held temporarily, shall be actively marketed for
sale, and the Servicer shall dispose of the Mortgaged Property as soon as
practicable, and in any case before the end of the third calendar year following
the calendar year in which the Trust Fund acquires the property. Notwithstanding
any other provision of this Agreement, no Mortgaged Property acquired by the
Trust Fund shall be rented (or allowed to continue to be rented) or otherwise
used for the production of income by or on behalf of the Trust Fund.

      The decision of the Servicer to foreclose on a defaulted Mortgage Loan
shall be subject to a determination by the Servicer that the proceeds of the
foreclosure would exceed the costs and expenses of bringing a foreclosure
proceeding. The proceeds received from the maintenance of any REO Properties,
net of reimbursement to the Servicer for costs incurred (including any property
or other taxes) in connection with maintenance of the REO Properties and net of
unreimbursed Servicing Fees, Advances, and Servicing Advances, shall be applied
to the payment of principal of and interest on the related defaulted Mortgage
Loans (with interest accruing as though the Mortgage Loans were still current
and adjustments, if applicable, to the Mortgage Rate were being made in
accordance with the Mortgage Note) and all such proceeds shall be deemed, for
all purposes in this Agreement, to be payments on account of principal and
interest on the related Mortgage Notes and shall be deposited into the
Certificate Account. To the extent the net proceeds received during any calendar
month exceeds the amount attributable to amortizing principal and accrued
interest at the related Mortgage Rate on the related Mortgage Loan for the
calendar month, the excess shall be considered to be a partial prepayment of
principal of the related Mortgage Loan.

      The proceeds from any liquidation of a Mortgage Loan, as well as any
proceeds from an REO Property, will be applied in the following order of
priority: first, to reimburse the Servicer for any related unreimbursed
Servicing Advances or Servicing Fees or for any related unreimbursed Advances,
as applicable; second, to reimburse the Servicer, as applicable, and to
reimburse the Certificate Account for any Nonrecoverable Advances (or portions
thereof) that were previously withdrawn by the Servicer pursuant to Section
3.09(a)(iii) that related to the Mortgage Loan; third, to accrued and unpaid
interest (to the extent no Advance has been made for such amount or any such
Advance has been reimbursed) on the Mortgage Loan or related REO Property, at
the Adjusted Net Mortgage Rate to the Due Date occurring in


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<PAGE>


the month in which such amounts are required to be distributed; and fourth, as a
recovery of principal of the Mortgage Loan. The Servicer will retain any Excess
Proceeds from the liquidation of a Liquidated Mortgage Loan as additional
servicing compensation pursuant to Section 3.15.

      The Servicer may agree to a modification of any Mortgage Loan at the
request of the related Mortgagor if (i) the modification is in lieu of a
refinancing and (ii) the Servicer purchases that Mortgage Loan from the Trust
Fund as described below. Upon the agreement of the Servicer to modify a Mortgage
Loan in accordance with the preceding sentence, the Servicer shall purchase that
Mortgage Loan and all interest of the Trustee in that Mortgage Loan shall
automatically be deemed transferred and assigned to the Servicer and all
benefits and burdens of ownership thereof, including the right to accrued
interest thereon from the date of purchase and the risk of default thereon,
shall pass to the Servicer. The Servicer shall promptly deliver to the Trustee a
certification of a Servicing Officer to the effect that all requirements of this
paragraph have been satisfied with respect to a Mortgage Loan to be repurchased
pursuant to this paragraph.

      The Servicer shall deposit the Purchase Price for any Mortgage Loan
repurchased pursuant to Section 3.12 in the Certificate Account pursuant to
Section 3.06 within one Business Day after the purchase of the Mortgage Loan.
Upon receipt by the Trustee of written notification of any such deposit signed
by a Servicing Officer, the Trustee shall release to the Servicer the related
Mortgage File and shall execute and deliver such instruments of transfer or
assignment, in each case without recourse, as shall be necessary to vest in the
Servicer any Mortgage Loan previously transferred and assigned pursuant hereto.
The Servicer covenants and agrees to indemnify the Trust Fund against any
liability for any "prohibited transaction" taxes and any related interest,
additions, and penalties imposed on the Trust Fund established hereunder as a
result of any modification of a Mortgage Loan effected pursuant to this Section,
or any purchase of a Mortgage Loan by the Servicer in connection with a
modification (but such obligation shall not prevent the Servicer or any other
appropriate Person from contesting any such tax in appropriate proceedings and
shall not prevent the Servicer from withholding payment of such tax, if
permitted by law, pending the outcome of such proceedings). The Servicer shall
have no right of reimbursement for any amount paid pursuant to the foregoing
indemnification, except to the extent that the amount of any tax, interest, and
penalties, together with interest thereon, is refunded to the Trust Fund.

      Section 3.13 Trustee to Cooperate; Release of Mortgage Files.

      Upon the payment in full of any Mortgage Loan, or the receipt by the
Servicer of a notification that payment in full will be escrowed in a manner
customary for such purposes, the Servicer will immediately notify the Trustee by
delivering a Request for Release substantially in the form of Exhibit N. Upon
receipt of the request, the Trustee shall promptly release the related Mortgage
File to the Servicer, and the Trustee shall at the Servicer's direction execute
and deliver to the Servicer the request for reconveyance, deed of reconveyance,
or release or satisfaction of mortgage or such instrument releasing the lien of
the Mortgage in each case provided by the Servicer, together with the Mortgage
Note with written evidence of cancellation thereon. The Servicer is authorized
to cause the removal from the registration on the MERS System of such Mortgage
and to execute and deliver, on behalf of the Trustee and the Certificateholders
or any of them, any and all instruments of satisfaction or cancellation or of
partial or full release. Expenses incurred in connection with any instrument of
satisfaction or deed of reconveyance shall be chargeable to the related
Mortgagor.

      From time to time and as shall be appropriate for the servicing or
foreclosure of any Mortgage Loan, including for such purpose collection under
any policy of flood insurance, any fidelity bond or errors or omissions policy,
or for the purposes of effecting a partial release of any Mortgaged Property
from the lien of the Mortgage or the making of any corrections to the Mortgage
Note or the Mortgage or any of the other documents included in the Mortgage
File, the Trustee shall, upon delivery to the Trustee


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of a Request for Release in the form of Exhibit M signed by a Servicing Officer,
release the Mortgage File to the Servicer or its designee. Subject to the
further limitations set forth below, the Servicer shall cause the Mortgage File
or documents so released to be returned to the Trustee when the need therefor by
the Servicer no longer exists, unless the Mortgage Loan is liquidated and the
proceeds thereof are deposited in the Certificate Account, in which case the
Servicer shall deliver to the Trustee a Request for Release in the form of
Exhibit N, signed by a Servicing Officer.

      If the Servicer at any time seeks to initiate a foreclosure proceeding in
respect of any Mortgaged Property as authorized by this Agreement, the Servicer
shall deliver to the Trustee, for signature, as appropriate, any court
pleadings, requests for trustee's sale, or other documents necessary to
effectuate such foreclosure or any legal action brought to obtain judgment
against the Mortgagor on the Mortgage Note or the Mortgage or to obtain a
deficiency judgment or to enforce any other remedies or rights provided by the
Mortgage Note or the Mortgage or otherwise available at law or in equity.

      Section 3.14 Documents, Records and Funds in Possession of the Servicer to
be Held for the Trustee.

      The Servicer shall account fully to the Trustee for any funds it receives
or otherwise collects as Liquidation Proceeds or Insurance Proceeds in respect
of any Mortgage Loan. All Mortgage Files and funds collected or held by, or
under the control of, the Servicer in respect of any Mortgage Loans, whether
from the collection of principal and interest payments or from Liquidation
Proceeds, including any funds on deposit in the Certificate Account, shall be
held by the Servicer for and on behalf of the Trustee and shall be and remain
the sole and exclusive property of the Trustee, subject to the applicable
provisions of this Agreement. The Servicer also agrees that it shall not create,
incur or subject any Mortgage File or any funds that are deposited in the
Certificate Account, Distribution Account, or any Escrow Account, or any funds
that otherwise are or may become due or payable to the Trustee for the benefit
of the Certificateholders, to any claim, lien, security interest, judgment,
levy, writ of attachment, or other encumbrance, or assert by legal action or
otherwise any claim or right of setoff against any Mortgage File or any funds
collected on, or in connection with, a Mortgage Loan, except, however, that the
Servicer shall be entitled to set off against and deduct from any such funds any
amounts that are properly due and payable to the Servicer under this Agreement.

      Section 3.15 Servicing Compensation.

      The Servicer may retain or withdraw from the Certificate Account the
Servicing Fee for each Mortgage Loan for the related Distribution Date. If the
Servicer directly services a Mortgage Loan, the Servicer may retain the
Servicing Fee for its own account as compensation for performing services.
Notwithstanding the foregoing, the Servicing Fee payable to the Servicer shall
be reduced by the lesser of the aggregate of the Prepayment Interest Shortfalls
with respect to the Distribution Date and the aggregate Compensating Interest
for the Distribution Date.

      Additional servicing compensation in the form of Excess Proceeds,
Prepayment Interest Excess, assumption fees, late payment charges and all income
net of any losses realized from Permitted Investments shall be retained by the
Servicer to the extent not required to be deposited in the Certificate Account
pursuant to Section 3.06. The Servicer shall be required to pay all expenses
incurred by it in connection with its servicing activities hereunder (including
the payment of any premiums for hazard insurance, and any Primary Insurance
Policy and maintenance of the other forms of insurance coverage required by this
Agreement) and shall not be entitled to reimbursement therefor except as
specifically provided in this Agreement.

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       Section 3.16 Access to Certain Documentation.

      The Servicer shall provide to the OTS and the FDIC and to comparable
regulatory authorities supervising Holders of Certificates and Certificate
Owners and the examiners and supervisory agents of the OTS, the FDIC, and such
other authorities, access to the documentation regarding the Mortgage Loans
required by applicable regulations of the OTS and the FDIC. Access shall be
afforded without charge, but only upon reasonable prior written request and
during normal business hours at the offices designated by the Servicer. Nothing
in this Section 3.16 shall limit the obligation of the Servicer to observe any
applicable law prohibiting disclosure of information regarding the Mortgagors
and the failure of the Servicer to provide access as provided in this Section
3.16 as a result of such obligation shall not constitute a breach of this
Section 3.16.

      Section 3.17 Annual Statement as to Compliance.

      (a) By March 15 of each year, commencing with 2008, the Servicer shall
deliver to the Trustee via electronic mail (DBSEC.Notifications@db.com) and the
Depositor an Officer's Certificate signed by two Servicing Officers stating, as
to each signer thereof, that (i) a review of the activities of the Servicer
during the preceding calendar year (or applicable portion thereof) and of the
performance of the Servicer under this Agreement has been made under such
officer's supervision, and (ii) to the best of such officer's knowledge, based
on the review, the Servicer has fulfilled all its obligations under this
Agreement, in all material respects throughout the year (or applicable portion
thereof), or, if there has been a failure to fulfill any obligation in any
material respect, specifying each failure known to the officer and the nature
and status thereof.

      (b) [Reserved].

      (c) Copies of such statement shall be provided by the Trustee to any
Certificateholder or Certificate Owner upon request at the Servicer's expense,
provided such statement is delivered by the Servicer to the Trustee.

      Section 3.18 Errors and Omissions Insurance; Fidelity Bonds.

      The Servicer shall obtain and maintain in force (a) policies of insurance
covering errors and omissions in the performance of its obligations as Servicer
hereunder and (b) a fidelity bond covering its officers, employees, and agents.
Each policy and bond shall, together, comply with the requirements from time to
time of FNMA or FHLMC for persons performing servicing for mortgage loans
purchased by FNMA or FHLMC. If any policy or bond ceases to be in effect, the
Servicer shall obtain a comparable replacement policy or bond from an insurer or
issuer meeting the above requirements as of the date of the replacement.

      Section 3.19 Notification of Adjustments.

      On each Adjustment Date, the Servicer shall make interest rate adjustments
for each Mortgage Loan in compliance with the requirements of the related
Mortgage and Mortgage Note and applicable regulations. The Servicer shall
execute and deliver the notices required by each Mortgage and Mortgage Note and
applicable regulations regarding interest rate adjustments. The Servicer also
shall provide timely notification to the Trustee of all applicable data and
information regarding such interest rate adjustments and the Servicer's methods
of implementing such interest rate adjustments. Upon the discovery by the
Servicer or the Trustee that the Servicer has failed to adjust or has
incorrectly adjusted a Mortgage Rate or a monthly payment pursuant to the terms
of the related Mortgage Note and Mortgage, the Servicer shall immediately
deposit in the Certificate Account from its own funds the amount of any


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loss caused thereby without reimbursement therefor; provided, however, the
Servicer shall not be liable with respect to any interest rate adjustments made
by any servicer prior to the Servicer.

      Section 3.20 Prepayment Charges.

      (a) The Servicer will not waive any part of any Prepayment Charge unless
the waiver relates to a default or a reasonably foreseeable default, the
Prepayment Charge would cause an undue hardship to the related borrower, the
Mortgaged Property is sold by the Mortgagor, the collection of any Prepayment
Charge would violate any relevant law or regulation or the waiving of the
Prepayment Charge would otherwise benefit the Trust Fund and it is expected that
the waiver would maximize recovery of total proceeds taking into account the
value of the Prepayment Charge and related Mortgage Loan and doing so is
standard and customary in servicing similar Mortgage Loans (including any waiver
of a Prepayment Charge in connection with a refinancing of a Mortgage Loan that
is related to a default or a reasonably foreseeable default). The Servicer will
not waive a Prepayment Charge in connection with a refinancing of a Mortgage
Loan that is not related to a default or a reasonably foreseeable default.

      (b) If a Prepayment Charge is waived other than as permitted by the prior
paragraph, then the Servicer is required to pay the amount of such waived
Prepayment Charge, for the benefit of the Holders of the Class P-1 and Class P-2
Certificates, by depositing such amount into the Distribution Account from its
own funds, without any right of reimbursement therefor, together with and at the
time that the amount prepaid on the related Mortgage Loan is required to be
deposited into the Distribution Account.

      (c) The Seller represents and warrants to the Depositor and the Trustee,
as of the Closing Date, that the information in the Prepayment Charge Schedule
(including the attached prepayment charge summary) is complete and accurate in
all material respects at the dates as of which the information is furnished and
each Prepayment Charge is permissible and enforceable in accordance with its
terms under applicable state law, except as the enforceability thereof is
limited due to acceleration in connection with a foreclosure or other
involuntary payment.

      (d) Upon discovery by the Servicer or a Responsible Officer of the Trustee
of a breach of the foregoing clause (c) that materially and adversely affects
the right of the Holders of the Class P-1 and Class P-2 Certificates to any
Prepayment Charge, the party discovering the breach shall give prompt written
notice to the other parties. Within 60 days of the earlier of discovery by the
Servicer or receipt of notice by the Servicer of breach, the Servicer shall cure
the breach in all material respects or shall pay into the Certificate Account
the amount of the Prepayment Charge that would otherwise be due from the
Mortgagor, less any amount representing such Prepayment Charge previously
collected and paid by the Servicer into the Certificate Account.


                                       64

<PAGE>


                                  ARTICLE FOUR

                   DISTRIBUTIONS AND ADVANCES BY THE SERVICER

      Section 4.01 Advances.

      (a) The Servicer shall determine on or before each Servicer Advance Date
whether it is required to make an Advance pursuant to the definition thereof. If
the Servicer determines it is required to make an Advance, it shall, on or
before the Servicer Advance Date, either (i) deposit into the Certificate
Account an amount equal to the Advance or (ii) make an appropriate entry in its
records relating to the Certificate Account that any Amount Held for Future
Distribution has been used by the Servicer in discharge of its obligation to
make any such Advance. Any funds so applied shall be replaced by the Servicer by
deposit in the Certificate Account no later than the close of business on the
next Servicer Advance Date. The Servicer shall be entitled to be reimbursed from
the Certificate Account for all Advances of its own funds made pursuant to this
Section 4.01 as provided in Section 3.09. The obligation to make Advances with
respect to any Mortgage Loan shall continue if such Mortgage Loan has been
foreclosed or otherwise terminated and the Mortgaged Property has not been
liquidated. The Servicer shall inform the Trustee of the amount of the Advance
to be made on each Servicer Advance Date no later than the second Business Day
before the related Distribution Date.

      (b) If the Servicer determines that it will be unable to comply with its
obligation to make the Advances as and when described in the second sentence of
Section 4.01(a), it shall use its best efforts to give written notice thereof to
the Trustee (each such notice an "Advance Notice"; and such notice may be given
by telecopy), not later than 3:00 P.M., New York time, on the Business Day
immediately preceding the related Servicer Advance Date, specifying the amount
that it will be unable to deposit (each such amount an "Advance Deficiency") and
certifying that such Advance Deficiency constitutes an Advance hereunder and is
not a Nonrecoverable Advance. If the Trustee receives a Trustee Advance Notice
on or before 3:00 P.M., New York time on a Servicer Advance Date, the Trustee is
entitled to immediately terminate the Servicer under Section 7.01, and shall,
not later than 3:00 P.M., New York time, on the related Distribution Date,
deposit in the Distribution Account an amount equal to the Advance Deficiency
identified in such Trustee Advance Notice unless it is prohibited from so doing
by applicable law. Notwithstanding the foregoing, the Trustee shall not be
required to make such deposit if the Trustee shall have received written
notification from the Servicer that the Servicer has deposited or caused to be
deposited in the Certificate Account an amount equal to such Advance Deficiency
by 3:00 P.M. New York time on the related Distribution Date. If the Trustee has
not terminated the Servicer, the Servicer shall reimburse the Trustee for the
amount of any Advance (including interest at the Prime Rate on the day of such
reimbursement published in The Wall Street Journal) on such amount, made by the
Trustee pursuant to this Section 4.01(b) not later than the second day following
the related Servicer Advance Date. In the event that the Servicer does not
reimburse the Trustee in accordance with the requirements of the preceding
sentence, the Trustee shall immediately (a) terminate all of the rights and
obligations of the Servicer under this Agreement in accordance with Section 7.01
and (b) subject to the limitations set forth in Section 3.05, assume all of the
rights and obligations of the Servicer hereunder.

      (c) The Servicer shall, not later than the close of business on the
Business Day immediately preceding each Servicer Advance Date, deliver to the
Trustee a report (in form and substance reasonably satisfactory to the Trustee)
that indicates (i) the Mortgage Loans with respect to which the Servicer has
determined that the related Scheduled Payments should be advanced and (ii) the
amount of the related Scheduled Payments. The Servicer shall deliver to the
Trustee on the related Servicer Advance Date an Officer's Certificate of a
Servicing Officer indicating the amount of any proposed Advance determined by
the Servicer to be a Nonrecoverable Advance.


                                       65
<PAGE>


      Section 4.02 Priorities of Distribution.

      (a) (1


 
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