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EXHIBIT 4.1


EXECUTION VERSION


  


WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.,


as Depositor


and


WASHINGTON MUTUAL BANK,


as Servicer


and


LASALLE BANK NATIONAL ASSOCIATION,


as Trustee


and


CHRISTIANA BANK & TRUST COMPANY,


as Delaware Trustee


POOLING AND SERVICING AGREEMENT


$540,282,554.17


Washington Mutual Mortgage Securities Corp.


Washington Mutual Mortgage Pass-Through Certificates


WMALT Series 2005-3


Cut-Off Date: April 1, 2005









 TABLE OF CONTENTS

 

	
 	
Page
	
ARTICLE I

	
6


	
Section 1.01.  Definitions

	
6


	
Aggregate Certificate Principal Balance

	
6


	
Appraised Value

	
6


	
Assignment of Proprietary Lease

	
6


	
Authenticating Agent

	
6


	
Authorized Denomination

	
6


	
Bankruptcy Loss

	
6


	
Beneficial Holder

	
7


	
Benefit Plan Opinion

	
7


	
Book-Entry Certificates

	
7


	
Business Day

	
7


	
Buydown Agreement

	
7


	
Buydown Fund

	
7


	
Buydown Fund Account

	
7


	
Buydown Loan

	
8


	
Cap Counterparty

	
8


	
Carry-Forward Subsequent Recoveries Amount

	
8


	
Certificate

	
8


	
Certificate Account

	
8


	
Certificate Group

	
8


	
Certificateholder or Holder

	
8


	
Certificate Interest Rate

	
9


	
Certificate of Trust

	
9


	
Certificate Principal Balance

	
9


	
Certificate Register and Certificate Registrar

	
9


	
Class

	
9


	
Class 1-CB-1 Certificates

	
9


	
Class 1-CB-1-L Regular Interest

	
9


	
Class 1-CB-2 Certificates

	
9


	
Class 1-CB-2-L Regular Interest

	
10


	
Class 1-CB-3 Certificates

	
10


	
Class 1-CB-3 Fraction

	
10


	
Class 1-CB-3-L Regular Interest

	
10


	
Class 1-CB-3-M Regular Interest

	
10


	
Class 1-CB-4 Certificates

	
10


	
Class 1-CB-4 Notional Amount

	
10


	
Class 1-CB-5 Certificates

	
10


	
Class 1-CB-5-L Regular Interest

	
10


	
Class 1-CB-6 Certificates

	
10


	
Class 1-CB-6-L Regular Interest

	
10


	
Class 1-P Fraction

	
10


	
Class 1-P Mortgage Loan

	
10


	
Class 2-A-1 Certificates

	
10


	
Class 2-A-1-L Regular Interest

	
11


	
Class 2-A-2 Certificates

	
11


	
Class 2-A-2-L Regular Interest

	
11


	
Class 2-A-3 Certificates

	
11


	
Class 2-A-3-L Regular Interest

	
11


	
Class 2-A-3-M Regular Interest

	
11


	
Class 2-A-4 Certificates

	
11


	
Class 2-A-4 Notional Amount

	
11


	
Class 2-A-5 Certificates

	
11


	
Class 2-A-5-L Regular Interest

	
11


	
Class 2-A-6 Certificates

	
11


	
Class 2-A-6-L Regular Interest

	
11


	
Class 2-P Fraction

	
11


	
Class 2-P Mortgage Loan

	
11


	
Class A Certificates

	
12


	
Class A-L Regular Interests

	
12


	
Class B Certificates

	
12


	
Class B-L Regular Interests

	
12


	
Class B Percentage

	
12


	
Class B-1 Certificates

	
12


	
Class B-1-L Regular Interest

	
12


	
Class B-2 Certificates

	
12


	
Class B-2-L Regular Interest

	
12


	
Class B-3 Certificates

	
12


	
Class B-3-L Regular Interest

	
12


	
Class B-4 Certificates

	
12


	
Class B-4-L Regular Interest

	
12


	
Class B-5 Certificates

	
12


	
Class B-5-L Regular Interest

	
12


	
Class B-6 Certificates

	
12


	
Class B-6-L Regular Interest

	
12


	
Class C-P Certificates

	
13


	
Class C-P-L Regular Interest

	
13


	
Class C-X Certificates

	
13


	
Class C-X-L Regular Interest

	
13


	
Class C-X Notional Amount

	
13


	
Class C-X-L Regular Interest

	
13


	
Class Notional Amount

	
13


	
Class P Certificates

	
13


	
Class P Fraction

	
13


	
Class P Mortgage Loan

	
13


	
Class P-L Regular Interests

	
13


	
Class Principal Balance

	
13


	
Class R Certificates

	
14


	
Class R Residual Interests

	
14


	
Class R-1 Residual Interest

	
14


	
Class R-2 Residual Interest

	
15


	
Class X Certificates

	
15


	
Class X-L Regular Interest

	
15


	
Clean-Up Call Percentage

	
15


	
Clearing Agency

	
15


	
Closing Date

	
15


	
Closing Date Loan-to-Value Ratio

	
15


	
Code

	
15


	
Company

	
15


	
Compensating Interest

	
15


	
Cooperative

	
15


	
Cooperative Apartment

	
15


	
Cooperative Lease

	
16


	
Cooperative Loans

	
16


	
Cooperative Stock

	
16


	
Cooperative Stock Certificate

	
16


	
Corporate Trust Office

	
16


	
Corporation

	
16


	
Corresponding Class

	
16


	
Credit Support Depletion Date

	
17


	
Cumulative Carry-Forward Subsequent Recoveries Amount

	
17


	
Curtailment

	
17


	
Curtailment Shortfall

	
17


	
Custodial Account for P&I

	
17


	
Custodial Account for Reserves

	
17


	
Custodial Agreement

	
18


	
Custodian

	
18


	
Cut-Off Date

	
18


	
Definitive Certificates

	
18


	
Delaware Trustee

	
18


	
Depositary Agreement

	
18


	
Destroyed Mortgage Note

	
18


	
Determination Date

	
18


	
Disqualified Organization

	
18


	
Distribution Date

	
18


	
DTC

	
19


	
DTC Participant

	
19


	
Due Date

	
19


	
Eligible Institution

	
19


	
Eligible Investments

	
19


	
ERISA

	
20


	
ERISA Restricted Certificate

	
20


	
Event of Default

	
21


	
Excess Liquidation Proceeds

	
21


	
Excess Subsequent Recoveries

	
21


	
Fannie Mae

	
21


	
FDIC

	
21


	
FHA

	
21


	
Final Maturity Date

	
21


	
Final Yield Maintenance Payment Date

	
21


	
Fitch

	
21


	
Freddie Mac

	
21


	
Group 1 Certificates

	
21


	
Group 1 Loans

	
21


	
Group 1 Lockout Adjusted Percentage

	
21


	
Group 1 Lockout Liquidation Amount

	
21


	
Group 1 Lockout Percentage

	
22


	
Group 1 Lockout Prepayment Percentage

	
22


	
Group 1 Lockout Priority Amount

	
22


	
Group 1 Premium Rate Mortgage Loans

	
22


	
Group 1 Senior Liquidation Amount

	
22


	
Group 1 Senior Percentage

	
22


	
Group 1 Senior Prepayment Percentage or Group 2 Senior Prepayment
Percentage

	
22


	
Group 1 Senior Principal Distribution Amount

	
24


	
Group 1 Subordinate Percentage

	
24


	
Group 1 Subordinate Prepayment Percentage

	
24


	
Group 1-A Certificates

	
24


	
Group 1-A-L Regular Interests

	
24


	
Group 1-L Regular Interests

	
24


	
Group 2 Certificates

	
24


	
Group 2 Loans

	
24


	
Group 2 Lockout Adjusted Percentage

	
25


	
Group 2 Lockout Liquidation Amount

	
25


	
Group 2 Lockout Percentage

	
25


	
Group 2 Lockout Prepayment Percentage

	
25


	
Group 2 Lockout Priority Amount

	
25


	
Group 2 Premium Rate Mortgage Loans

	
25


	
Group 2 Senior Liquidation Amount

	
25


	
Group 2 Senior Percentage

	
25


	
Group 2 Senior Prepayment Percentage

	
25


	
Group 2 Senior Principal Distribution Amount

	
26


	
Group 2 Subordinate Percentage

	
26


	
Group 2 Subordinate Prepayment Percentage

	
26


	
Group 2-A Certificates

	
26


	
Group 2-A-L Regular Interests

	
26


	
Group 2-L Regular Interests

	
26


	
Indirect DTC Participants

	
26


	
Insurance Proceeds

	
26


	
Interest Distribution Amount

	
26


	
Interest Transfer Amount

	
27


	
Investment Account

	
27


	
Investment Depository

	
27


	
Junior Subordinate Certificates

	
27


	
Last Scheduled Distribution Date

	
27


	
Lender

	
27


	
LIBOR

	
27


	
LIBOR Determination Date

	
27


	
Liquidated Mortgage Loan

	
27


	
Liquidation Principal

	
27


	
Liquidation Proceeds

	
27


	
Loan Group

	
28


	
Loan Group 1

	
28


	
Loan Group 2

	
28


	
Loan-to-Value Ratio

	
28


	
Lowest Class B Owner

	
28


	
MERS

	
28


	
MERS Loan

	
28


	
MERS® System

	
28


	
MIN

	
28


	
MOM Loan

	
28


	
Monthly P&I Advance

	
28


	
Monthly Payment

	
28


	
Moody’s

	
28


	
Mortgage

	
28


	
Mortgage File

	
28


	
Mortgage Interest Rate

	
31


	
Mortgage Loan Schedule

	
31


	
Mortgage Loans

	
32


	
Mortgage Note

	
32


	
Mortgage Pool

	
32


	
Mortgage Pool Assets

	
32


	
Mortgaged Property

	
32


	
Mortgagor

	
32


	
Nonrecoverable Advance

	
32


	
Non-U.S. Person

	
32


	
Notice Addresses

	
33


	
OTS

	
33


	
Officer’s Certificate

	
33


	
Opinion of Counsel

	
33


	
Original Trust Agreement

	
33


	
Original Value

	
33


	
Overcollateralized Group

	
33


	
Ownership Interest

	
34


	
Pass-Through Entity

	
34


	
Pass-Through Rate

	
34


	
Paying Agent

	
34


	
Payoff

	
34


	
Payoff Earnings

	
34


	
Payoff Interest

	
34


	
Payoff Period

	
35


	
Percentage Interest

	
35


	
Permitted Transferee

	
35


	
Person

	
36


	
Prepaid Monthly Payment

	
36


	
Primary Insurance Policy

	
36


	
Principal Balance

	
36


	
Principal Payment

	
37


	
Principal Payment Amount

	
37


	
Principal Prepayment

	
37


	
Principal Prepayment Amount

	
37


	
Principal Transfer Amount

	
37


	
Prior Period

	
37


	
Prospectus

	
37


	
Purchase Obligation

	
37


	
Purchase Price

	
37


	
Rating Agency

	
38


	
Ratings

	
38


	
Realized Loss

	
38


	
Recognition Agreement

	
40


	
Record Date

	
40


	
Reference Banks

	
40


	
Regular Interests

	
40


	
Relief Act Shortfall

	
40


	
REMIC

	
40


	
REMIC Provisions

	
40


	
REMIC I

	
40


	
REMIC I Assets

	
40


	
REMIC I Available Distribution Amount

	
41


	
REMIC I Distribution Amount

	
41


	
REMIC I Regular Interests

	
49


	
REMIC II

	
49


	
REMIC II Assets

	
49


	
REMIC II Available Distribution Amount

	
49


	
REMIC II Distribution Amount

	
49


	
REMIC II Regular Interests

	
51


	
Residual Certificates

	
51


	
Residual Distribution Amount

	
51


	
Responsible Officer

	
51


	
ROV Mortgage Loan

	
51


	
S&P

	
51


	
Secretary of State

	
51


	
Securities Act

	
51


	
Security Agreement

	
52


	
Selling and Servicing Contract

	
52


	
Senior Regular Interests

	
52


	
Senior Subordinate Certificates

	
52


	
Servicer

	
52


	
Servicer Business Day

	
52


	
Servicing Fee

	
52


	
Servicing Fee Rate

	
52


	
Servicing Officer

	
52


	
Special Primary Insurance Policy

	
52


	
Special Primary Insurance Premium

	
52


	
Statutory Trust Statute

	
52


	
Step Down Percentage

	
53


	
Streamlined Mortgage Loan

	
53


	
Stripped Interest Rate

	
53


	
Subordinate Certificates

	
53


	
Subordinate Component Balance

	
53


	
Subordinate Liquidation Amount

	
53


	
Subordinate Percentage

	
53


	
Subordinate Principal Distribution Amount

	
53


	
Subordinate Principal Prepayments Distribution Amount

	
54


	
Subordination Level

	
54


	
Subsequent Recoveries

	
55


	
Substitute Mortgage Loan

	
55


	
Tax Matters Person

	
55


	
Termination Date

	
55


	
Termination Payment

	
55


	
Total Transfer Amount

	
55


	
Transfer

	
55


	
Transferee

	
55


	
Transferee Affidavit and Agreement

	
55


	
Trust

	
55


	
Trustee

	
56


	
Uncollected Interest

	
56


	
Uncompensated Interest Shortfall

	
56


	
Undercollateralized Group

	
56


	
Underwriter

	
56


	
Underwriting Standards

	
56


	
Uninsured Cause

	
56


	
U.S. Person

	
57


	
VA

	
57


	
Withdrawal Date

	
57


	
Yield Maintenance Account

	
57


	
Yield Maintenance Agreements

	
57


	
Yield Maintenance Notional Balance

	
57


	
Yield Maintenance Payment Amount

	
57


	
ARTICLE II  Creation of the Trust; Conveyance of the Mortgage Pool
Assets, REMIC I Regular Interests and REMIC II Regular Interests; REMIC Election and Designations;
Original Issuance of Certificates

	
58


	
Section 2.01.  Creation of the Trust

	
58


	
Section 2.02.  Restrictions on Activities of the Trust

	
59


	
Section 2.03.  Separateness Requirements

	
59


	
Section 2.04.  Conveyance of Mortgage Pool Assets; Security
Interest

	
61


	
Section 2.05.  Delivery of Mortgage Files

	
62


	
Section 2.06.  REMIC Election for REMIC I

	
63


	
Section 2.07.  Acceptance by Trustee

	
65


	
Section 2.08.  Representations and Warranties of the Company
Concerning the Mortgage Loans

	
67


	
Section 2.09.  Acknowledgment of Transfer of Mortgage Pool
Assets

	
72


	
Section 2.10.  Conveyance of REMIC II Assets; Security
Interest

	
72


	
Section 2.11.  REMIC Election for REMIC II

	
73


	
Section 2.12.  Acknowledgement of Transfer of REMIC II Assets;
Authentication of Certificates

	
74


	
Section 2.13.  Legal Title

	
74


	
Section 2.14.  Compliance with ERISA Requirements

	
74


	
Section 2.15.  Additional Representation of the Company Concerning
the Mortgage Loans

	
74


	
ARTICLE III  Administration and Servicing of Mortgage
Loans

	
75


	
Section 3.01.  The Servicer

	
75


	
Section 3.02.  Custodial Accounts and Buydown Fund
Accounts

	
77


	
Section 3.03.  The Investment Account; Eligible
Investments

	
78


	
Section 3.04.  The Certificate Account

	
78


	
Section 3.05.  Permitted Withdrawals from the Certificate Account,
the Investment Account, Custodial Accounts for P&I and Custodial Accounts for Reserves and of Buydown Funds from the
Buydown Fund Accounts

	
79


	
Section 3.06.  Maintenance of Primary Insurance Policies;
Collections Thereunder

	
81


	
Section 3.07.  Maintenance of Hazard Insurance

	
81


	
Section 3.08.  Enforcement of Due-on-Sale Clauses; Assumption
Agreements

	
82


	
Section 3.09.  Realization Upon Defaulted Mortgage Loans

	
83


	
Section 3.10.  Trustee to Cooperate; Release of Mortgage
Files

	
85


	
Section 3.11.  Compensation to the Servicer

	
85


	
Section 3.12.  Reports to the Trustee; Certificate Account
Statement

	
85


	
Section 3.13.  Annual Statement as to Compliance

	
86


	
Section 3.14.  Access to Certain Documentation and Information
Regarding the Mortgage Loans

	
86


	
Section 3.15.  Annual Independent Public Accountants’
Servicing Report

	
86


	
Section 3.16.  Yield Maintenance Account.

	
87


	
Section 3.17.  [Reserved.]

	
87


	
Section 3.18.  [Reserved.]

	
87


	
Section 3.19.  Determination of LIBOR by Servicer.

	
87


	
Section 3.20.  [Reserved.]

	
89


	
Section 3.21.  [Reserved.]

	
89


	
ARTICLE IV  Payments to Certificateholders; Payment of
Expenses

	
89


	
Section 4.01.  Distributions to Holders of REMIC I Regular
Interests and Class R-1 Residual Interest

	
89


	
Section 4.02.  Advances by the Servicer; Distribution Reports to
the Trustee

	
90


	
Section 4.03.  Nonrecoverable Advances

	
91


	
Section 4.04.  Distributions to Certificateholders; Payment of
Special Primary Insurance Premiums

	
91


	
Section 4.05.  Statements to Certificateholders

	
93


	
ARTICLE V  The Certificates

	
93


	
Section 5.01.  The Certificates

	
93


	
Section 5.02.  Certificates Issuable in Classes; Distributions of
Principal and Interest; Authorized Denominations

	
100


	
Section 5.03.  Registration of Transfer and Exchange of
Certificates

	
100


	
Section 5.04.  Mutilated, Destroyed, Lost or Stolen
Certificates

	
101


	
Section 5.05.  Persons Deemed Owners

	
101


	
Section 5.06.  Temporary Certificates

	
101


	
Section 5.07.  Book-Entry for Book-Entry Certificates

	
102


	
Section 5.08.  Notices to Clearing Agency

	
103


	
Section 5.09.  Definitive Certificates

	
103


	
Section 5.10.  Office for Transfer of Certificates

	
103


	
Section 5.11.  Nature of Certificates

	
103


	
ARTICLE VI  The Company and the Servicer

	
104


	
Section 6.01.  Liability of the Company and the Servicer

	
104


	
Section 6.02.  Merger or Consolidation of the Company or the
Servicer

	
104


	
Section 6.03.  Limitation on Liability of the Company, the Servicer
and Others

	
104


	
Section 6.04.  Neither the Company nor the Servicer may
Resign

	
105


	
Section 6.05.  Trustee Access.

	
105


	
ARTICLE VII  Default

	
105


	
Section 7.01.  Events of Default

	
105


	
Section 7.02.  Trustee to Act; Appointment of Successor

	
108


	
Section 7.03.  Notification to Certificateholders

	
109


	
ARTICLE VIII  Concerning the Trustees

	
109


	
Section 8.01.  Duties of Trustees

	
109


	
Section 8.02.  Certain Matters Affecting the Trustees

	
110


	
Section 8.03.  Trustees Not Liable for Certificates or Mortgage
Loans

	
112


	
Section 8.04.  Trustees May Own Certificates

	
112


	
Section 8.05.  The Servicer to Pay Trustees’ Fees and
Expenses

	
112


	
Section 8.06.  Eligibility Requirements for Trustees

	
113


	
Section 8.07.  Resignation and Removal of Trustees

	
113


	
Section 8.08.  Successor Trustee

	
114


	
Section 8.09.  Merger or Consolidation of Trustee

	
114


	
Section 8.10.  Appointment of Co-Trustee or Separate
Trustee

	
114


	
Section 8.11.  Authenticating Agents

	
115


	
Section 8.12.  Paying Agents

	
116


	
Section 8.13.  Duties of Delaware Trustee

	
117


	
Section 8.14.  Amendment to Certificate of Trust

	
117


	
Section 8.15.  Limitation of Liability

	
117


	
Section 8.16.  Yield Maintenance Agreements

	
118


	
ARTICLE IX  Termination

	
118


	
Section 9.01.  Termination Upon Purchase by the Servicer or
Liquidation of All Mortgage Loans

	
118


	
Section 9.02.  Additional Termination Requirements

	
120


	
Section 9.03.  Trust Irrevocable

	
121


	
ARTICLE X  Miscellaneous Provisions

	
121


	
Section 10.01.  Amendment

	
121


	
Section 10.02.  Recordation of Agreement

	
122


	
Section 10.03.  Limitation on Rights of
Certificateholders

	
122


	
Section 10.04.  Access to List of Certificateholders

	
123


	
Section 10.05.  Governing Law

	
124


	
Section 10.06.  Notices

	
124


	
Section 10.07.  Severability of Provisions

	
124


	
Section 10.08.  Counterpart Signatures

	
124


	
Section 10.09.  Benefits of Agreement

	
124


	
Section 10.10.  Notices and Copies to Rating Agencies

	
124







 




Exhibit A          Form of
Certificates (other than Class R Certificates)

Exhibit B          Form of Class R Certificates

Exhibit C          Anti-Predatory Lending Categorization

Exhibit D          Mortgage Loan Schedule

Exhibit E           [Reserved]

Exhibit F           Form of Transferor Certificate For Junior Subordinate
Certificates

Exhibit G          Form of Transferee’s Agreement For Junior Subordinate
Certificates

Exhibit H          Form of Additional Matter Incorporated Into the Certificates

Exhibit I            Transferor Certificate

Exhibit J           Transferee Affidavit And Agreement

Exhibit K          [Reserved]

Exhibit L           Form of Investment Letter

Exhibit M         Form of Trustee’s Certification Pursuant to Section 2.07

Exhibit N          Officer’s Certificate With Respect to ERISA Matters Pursuant
to Section 5.01(d)

Exhibit O          Officer’s Certificate With Respect to ERISA Matters Pursuant
to Section 5.01(g)


 




This Pooling and Servicing Agreement, dated and effective as of April 1, 2005 (this
“Agreement”), is executed by and among Washington Mutual Mortgage Securities Corp., as depositor (the
“Company”), Washington Mutual Bank (known prior to April 4, 2005 as Washington Mutual Bank, FA), as Servicer
(the “Servicer”), LaSalle Bank National Association, a national banking association with a corporate trust
office at 135 South LaSalle Street, Suite 1625, Chicago, Illinois 60603, as Trustee (the “Trustee”), and
Christiana Bank & Trust Company, as Delaware Trustee (the “Delaware Trustee”).  Capitalized terms used
in this Agreement and not otherwise defined have the meanings ascribed to such terms in Article I hereof.


PRELIMINARY STATEMENT


The Company at the Closing Date is the owner of the Mortgage Loans and the other property
being conveyed by it to the Trust. On the Closing Date, the Company will acquire the REMIC I Regular Interests and the Class R-1
Residual Interest from the Trust as consideration for its transfer to the Trust of the Mortgage Loans and certain other assets and
will be the owner of the REMIC I Regular Interests and the Class R-1 Residual Interest.  Thereafter on the Closing Date, the
Company will acquire the Certificates (other than the Class R Certificates) and the Class R-2 Residual Interest from the Trust as
consideration for its transfer to the Trust of the REMIC I Regular Interests and will be the owner of the Certificates.  The
Company has duly authorized the execution and delivery of this Agreement to provide for (i) the conveyance to the Trust of the
Mortgage Loans and certain other assets, (ii) the issuance to the Company of the REMIC I Regular Interests and the Class R-1
Residual Interest representing in the aggregate the entire beneficial interest in REMIC I, (iii) the conveyance to the Trust of the
REMIC I Regular Interests and (iv) the issuance to the Company of the Certificates, such Certificates (other than the portion of
the Class R Certificates representing ownership of the Class R-1 Residual Interest) representing in the aggregate the entire
beneficial interest in REMIC II. The Company and the Servicer are entering into this Agreement, and the Trustee and the Delaware
Trustee are each accepting the trust created hereby, for good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged.


The Certificates issued hereunder, other than the Junior Subordinate Certificates, have
been offered for sale pursuant to a Prospectus, dated April 20, 2005, and a Prospectus Supplement, dated April 21, 2005, of the
Company (together, the “Prospectus”). The Junior Subordinate Certificates have been offered for sale pursuant to
a Private Placement Memorandum, dated April 26, 2005.  The Trust created hereunder is intended to be the “Trust”
described in the Prospectus and the Private Placement Memorandum and the Certificates are intended to be the
“Certificates” described therein. The following tables set forth the designation, type of interest, Certificate
Interest Rate, initial Class Principal Balance and Final Maturity Date for the REMIC I Regular Interests, the Class R Residual
Interests and the Certificates:


 


 


REMIC I Interests



	
 

	
Class Designation

for each

Class of REMIC I

Regular Interests

and the Class R-1 Residual Interest


	
 

	
Type of

Interest


	
 

	
Certificate Interest

Rate (1)


	
 

	
Initial Class

Principal Balance


	
 

	
Final Maturity

Date*



	
 

	
Class 1-CB-1-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
$   39,748,000.00

	
 

	
May 2035


	
 

	
Class 1-CB-2-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
2,049,000.00

	
 

	
May 2035


	
 

	
Class 1-CB-3-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
356,447,000.00

	
 

	
May 2035


	
 

	
Class 1-CB-5-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
10,953,000.00

	
 

	
May 2035


	
 

	
Class 1-CB-6-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
8,770,300.00

	
 

	
May 2035


	
 

	
Class 2-A-1-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
8,815,000.00

	
 

	
May 2035


	
 

	
Class 2-A-2-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
34,500,000.00

	
 

	
May 2035


	
 

	
Class 2-A-3-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
46,317,000.00

	
 

	
May 2035


	
 

	
Class 2-A-5-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
2,614,000.00

	
 

	
May 2035


	
 

	
Class 2-A-6-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
455,000.00

	
 

	
May 2035


	
 

	
Class C-X-L

	
 

	
Regular

	
 

	
5.500%(2)

	
 

	
-----

	
 

	
May 2035


	
 

	
Class C-P-L

	
 

	
Regular

	
 

	
(3)

	
 

	
2,059,478.92

	
 

	
May 2035


	
 

	
Class B-1-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
9,725,000.00

	
 

	
May 2035


	
 

	
Class B-2-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
6,753,000.00

	
 

	
May 2035


	
 

	
Class B-3-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
4,322,000.00

	
 

	
May 2035


	
 

	
Class B-4-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
3,241,000.00

	
 

	
May 2035


	
 

	
Class B-5-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
2,161,000.00

	
 

	
May 2035


	
 

	
Class B-6-L

	
 

	
Regular

	
 

	
5.500%

	
 

	
1,352,676.17

	
 

	
May 2035


	
 

	
Class R-1†

	
 

	
Residual

	
 

	
5.500%

	
 

	
100.00

	
 

	
May 2035


	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 


	
*  The Distribution
Date in the specified month, which is the month following the month the latest maturing Mortgage Loan in the related Loan Group (or
Loan Groups, as applicable) matures. For federal income tax purposes, for each Class of REMIC I Regular and Residual Interests, the
“latest possible maturity date” shall be the Final Maturity Date.

	
 


	
†  The
Class R-1 Residual Interest is entitled to receive the applicable Residual Distribution Amount and any Excess Liquidation
Proceeds.

	
 


	
(1)  Interest distributed on
each Distribution Date to the REMIC I Regular Interests (other than the Class P-L Regular Interests, which shall not be entitled to
receive any distributions of interest) will have accrued at the applicable per annum Certificate Interest Rate on the applicable
Class Principal Balance or Class Notional Amount outstanding immediately before such Distribution Date.

	
 


	
(2)  The
Class C-X-L Regular Interest shall accrue interest on the Class C-X Notional Amount.  The Class C-X-L Regular Interest shall
not be entitled to receive any distributions of principal.

	
 


	
(3)  The
Class P-L Regular Interests shall not be entitled to receive any distributions of interest.

	
 


	
 

	
 


	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 







 





 


As provided herein, with respect to REMIC I, the Servicer will cause an election to be
made on behalf of REMIC I to be treated for federal income tax purposes as a REMIC. The REMIC I Regular Interests will be
designated regular interests in REMIC I and the Class R-1 Residual Interest will be designated the sole class of residual interest
in REMIC I, for purposes of the REMIC Provisions.


 


REMIC II Interests



	
 

	
 Class Designation

for each

Class of REMIC II

Regular Interests and the

Class R-2 Residual
Interest


	
 

	
Type of

Interest


	
 

	
Certificate Interest

Rate (1)


	
 

	
Initial Class

Principal Balance


	
 

	
Final Maturity

Date*



	
 

	
Class 1-CB-1

	
 

	
Regular

	
 

	
5.500%

	
 

	
$   39,748,000.00

	
 

	
May 2035


	
 

	
Class 1-CB-2

	
 

	
Regular

	
 

	
5.500%

	
 

	
2,049,000.00

	
 

	
May 2035


	
 

	
Class 1-CB-3-M

	
 

	
Regular

	
 

	
(2)

	
 

	
356,447,000.00

	
 

	
May 2035


	
 

	
Class 1-CB-4

	
 

	
Regular

	
 

	
(3)

	
 

	
-----

	
 

	
May 2035


	
 

	
Class 1-CB-5

	
 

	
Regular

	
 

	
5.500%

	
 

	
10,953,000.00

	
 

	
May 2035


	
 

	
Class 1-CB-6

	
 

	
Regular

	
 

	
5.500%

	
 

	
8,770,300.00

	
 

	
May 2035


	
 

	
Class 2-A-1

	
 

	
Regular

	
 

	
5.500%

	
 

	
8,815,000.00

	
 

	
May 2035


	
 

	
Class 2-A-2

	
 

	
Regular

	
 

	
5.500%

	
 

	
34,500,000.00

	
 

	
May 2035


	
 

	
Class 2-A-3-M

	
 

	
Regular

	
 

	
(4)

	
 

	
46,317,000.00

	
 

	
May 2035


	
 

	
Class 2-A-4

	
 

	
Regular

	
 

	
(5)

	
 

	
-----

	
 

	
May 2035


	
 

	
Class 2-A-5

	
 

	
Regular

	
 

	
5.500%

	
 

	
2,614,000.00

	
 

	
May 2035


	
 

	
Class 2-A-6

	
 

	
Regular

	
 

	
5.500%

	
 

	
455,000.00

	
 

	
May 2035


	
 

	
Class C-X

	
 

	
Regular

	
 

	
5.500%(6)

	
 

	
-----

	
 

	
May 2035


	
 

	
Class C-P

	
 

	
Regular

	
 

	
(7)

	
 

	
2,059,478.92

	
 

	
May 2035


	
 

	
Class B-1

	
 

	
Regular

	
 

	
5.500%

	
 

	
9,725,000.00

	
 

	
May 2035


	
 

	
Class B-2

	
 

	
Regular

	
 

	
5.500%

	
 

	
6,753,000.00

	
 

	
May 2035


	
 

	
Class B-3

	
 

	
Regular

	
 

	
5.500%

	
 

	
4,322,000.00

	
 

	
May 2035


	
 

	
Class B-4

	
 

	
Regular

	
 

	
5.500%

	
 

	
3,241,000.00

	
 

	
May 2035


	
 

	
Class B-5

	
 

	
Regular

	
 

	
5.500%

	
 

	
2,161,000.00

	
 

	
May 2035


	
 

	
Class B-6

	
 

	
Regular

	
 

	
5.500%

	
 

	
1,352,676.17

	
 

	
May 2035


	
 

	
Class R-2 (8)

	
 

	
Residual

	
 

	
-----

	
 

	
-----

	
 

	
May 2035


	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 


	
*             The Distribution
Date in the specified month, which is the month following the month the latest maturing Mortgage Loan in the related Loan Group (or
Loan Groups, as applicable) matures. For federal income tax purposes, for each Class of REMIC II Regular and Residual Interests,
the “latest possible maturity date” shall be the Final Maturity Date.

	
 


	
(1)           Interest distributed on
each Distribution Date to the Certificates (other than the Class P Certificates, which shall not be entitled to receive any
distributions of interest) will have accrued at the applicable per annum Certificate Interest Rate on the applicable Class
Principal Balance or Class Notional Amount outstanding immediately before such Distribution Date.

	
 


	
(2)           The Certificate Interest
Rate for the Class 1-CB-3-M Regular Interest shall equal LIBOR plus 0.450%, subject to a minimum and maximum Certificate Interest
Rate of 0.450% and 5.500% per annum, respectively.

	
 


	
(3)           The Certificate Interest
Rate for the Class 1-CB-4 Certificates shall equal 5.050% minus LIBOR, subject to a minimum and maximum Certificate Interest Rate
of 0.000% and 5.050% per annum, respectively.  The Class 1-CB-4 Certificates shall accrue interest on the Class 1-CB-4
Notional Amount.  The Class 1-CB-4 Certificates shall not be entitled to receive any distributions of principal.

	
 


	
(4)           The Certificate Interest
Rate for the Class 2-A-3-M Regular Interest shall equal LIBOR plus 0.550%, subject to a minimum and maximum Certificate Interest
Rate of 0.550% and 5.500% per annum, respectively.

	
 


	
(5)           The Certificate Interest
Rate for the Class 2-A-4 Certificates shall equal 4.950% minus LIBOR, subject to a minimum and maximum Certificate Interest Rate of
0.000% and 4.950% per annum, respectively.  The Class 2-A-4 Certificates shall accrue interest on the Class 2-A-4 Notional
Amount.  The Class 2-A-4 Certificates shall not be entitled to receive any distributions of principal.

	
 


	
(6)           The
Class C-X Certificates shall accrue interest on the Class C-X Notional Amount.  The Class C-X Certificates shall not be
entitled to receive any distributions of principal.

	
 


	
(7)           The
Class P Certificates shall not be entitled to receive any distributions of interest.

	
 


	
(8)           The Class R‐2
Residual Interest shall be entitled to receive the applicable Residual Distribution Amount.  The Class R‐2 Residual
Interest shall not be entitled to receive any distributions of interest or principal.

	
 


	
 

	
 


	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
 







 





 


As provided herein, with respect to REMIC II, the Servicer will cause an election to be
made on behalf of REMIC II to be treated for federal income tax purposes as a REMIC. The REMIC II Regular Interests will be
designated regular interests in REMIC II, and the Class R-2 Residual Interest will be designated the sole class of residual
interest in REMIC II, for purposes of the REMIC Provisions. 


In addition, the Trust will issue the Class R Certificates, which will represent ownership
of the Class R-1 and Class R-2 Residual Interests.


In addition, the Trust will issue (i) the Class 1-CB-3 Certificates, which will represent
ownership of (x) the Class 1-CB-3-M Regular Interest and (y) the applicable rights specified in the second sentence of Section
4.04(a) and (ii) the Class 2-A-3 Certificates, which will represent ownership of (x) the Class 2-A-3-M Regular Interest and
(y) the applicable rights specified in the second sentence of Section 4.04(a).


As of the Cut-Off Date, the Mortgage Loans have an aggregate Principal Balance of
$540,282,555.09 and the Certificates have an Aggregate Certificate Principal Balance of $540,282,554.17.



  


W I T N E S S E T H :


WHEREAS, the Company is a corporation duly organized and existing under and by virtue of
the laws of the State of Delaware and has full corporate power and authority to enter into this Agreement and to undertake the
obligations undertaken by it herein;


WHEREAS, the Servicer is a federal savings association duly organized and existing under
and by virtue of the laws of the United States of America and has full power and authority to enter into this Agreement and to
undertake the obligations undertaken by it herein;


WHEREAS, the Trustee is a national banking association duly organized and existing under
the laws of the United States of America and has full power and authority to enter into this Agreement;


WHEREAS, the Delaware Trustee is a banking corporation duly organized and existing under
the laws of the State of Delaware and has full power and authority to enter into this Agreement;


WHEREAS, prior to the execution and delivery hereof, the Company and the Delaware Trustee
have entered into the Original Trust Agreement, and the Delaware Trustee has filed the Certificate of Trust;


WHEREAS, it is the intention of the Company, the Trustee, the Servicer and the Delaware
Trustee that the Trust created by this Agreement constitute a statutory trust under the Statutory Trust Statute, that this
Agreement constitute the governing instrument of the Trust, and that this Agreement amend and restate the Original Trust
Agreement;


WHEREAS, the Company is the owner of the Mortgage Loans identified in the Mortgage Loan
Schedule hereto having unpaid Principal Balances on the Cut-Off Date as stated therein; and


WHEREAS, the Company has been duly authorized to create the Trust to (i) hold the Mortgage
Loans and certain other property, (ii) issue the REMIC I Regular Interests and the Class R-1 Residual Interest, (iii) hold the
REMIC I Regular Interests and (iv) issue the Certificates.


NOW, THEREFORE, in order to declare the terms and conditions upon which the REMIC I
Regular Interests, the Class R Residual Interests and the Certificates are to be issued, and in consideration of the premises and
of the purchase and acceptance of the Certificates by the Holders thereof, the Company covenants and agrees with the Trustee, the
Servicer and the Delaware Trustee, for the equal and proportionate benefit of the respective Holders from time to time of the REMIC
I Regular Interests and the Certificates, as applicable, as follows:


ARTICLE I


Section 1.01.        Definitions.


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


Aggregate Certificate Principal Balance: At any given time, the
sum of the then current Class Principal Balances of the Certificates.


Appraised Value:  With respect to any (i) Mortgage
Loan that is not a Streamlined Mortgage Loan or ROV Mortgage Loan, the lesser of (a) the value set forth on the appraisal made in
connection with the origination of such Mortgage Loan as the value of the related Mortgaged Property and (b) the purchase price
paid for the Mortgaged Property, provided, however, that if such Mortgage Loan was originated in connection with the
refinance of a mortgage loan, such value shall be based solely on the appraisal made in connection with the origination of such
Mortgage Loan; (ii) ROV Mortgage Loan, the lesser of (a) the value set forth on the residential appraisal review made in
connection with the origination of such Mortgage Loan as the value of the related Mortgaged Property and (b) the purchase price
paid for the Mortgaged Property, provided, however, that if such ROV Mortgage Loan was originated in connection with the
refinance of a mortgage loan, such value shall be based solely on the residential appraisal review made in connection with the
origination of such ROV Mortgage Loan; and (iii) Streamlined Mortgage Loan, the value set forth in the appraisal made in
connection with the origination of the mortgage loan being refinanced.


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


Authenticating Agent: Any authenticating agent appointed by the
Trustee pursuant to Section 8.11.


Authorized Denomination: With respect to the Certificates
(other than the Class X, Class 1-CB-4, Class 1-CB-5, Class 2-A-4 and Class R Certificates), an initial Certificate Principal
Balance equal to $25,000 and multiples of $1 in excess thereof, except that one Certificate of each Class of the Junior Subordinate
Certificates may be issued in an amount that is not an integral multiple of $1.  With respect to the Class 1-CB-5
Certificates, an initial Certificate Principal Balance equal to $1,000 and multiples of $1 in excess thereof.  With respect to
the Class 1-CB-4, Class 2-A-4 and Class X Certificates, a Class Notional Amount as of the Cut-Off Date equal to $100,000 and
multiples of $1 in excess thereof. With respect to the Class R Certificates, one Certificate with a Percentage Interest equal to
0.01% and one Certificate with a Percentage Interest equal to 99.99%.


Bankruptcy Loss: A loss on a Mortgage Loan arising out of (i) a
reduction in the scheduled Monthly Payment for such Mortgage Loan by a court of competent jurisdiction in a case under the United
States Bankruptcy Code, other than any such reduction that arises out of clause (ii) of this definition of “Bankruptcy
Loss,” including, without limitation, any such reduction that results in a permanent forgiveness of principal, or (ii) with
respect to any Mortgage Loan, a valuation, by a court of competent jurisdiction in a case under such Bankruptcy Code, of the
related Mortgaged Property in an amount less than the then outstanding Principal Balance of such Mortgage Loan.


Beneficial Holder: A Person holding a beneficial interest in
any Book-Entry Certificate as or through a DTC Participant or an Indirect DTC Participant or a Person holding a beneficial interest
in any Definitive Certificate.


Benefit Plan Opinion: With respect to any Certificate presented
for registration in the name of any Person, an Opinion of Counsel acceptable to and in form and substance satisfactory to the
Trustee and the Company to the effect that the purchase or holding of such Certificate is permissible under applicable law, will
not constitute or result in a non-exempt prohibited transaction under Section 406 of ERISA or Section 4975 of the Code, and will
not subject the Trust, the Trustee, the Delaware Trustee, the Servicer or the Company to any obligation or liability (including
obligations or liabilities under Section 406 of ERISA or Section 4975 of the Code) in addition to those undertaken in this
Agreement, which Opinion of Counsel shall not be an expense of the Trust, the Trustee, the Delaware Trustee, the Servicer or the
Company.


Book-Entry Certificates: The Class A, Class X, Class P and
Senior Subordinate Certificates, beneficial ownership and transfers of which shall be made through book entries as described in
Section 5.07.


Business Day: Any day other than a Saturday, a Sunday, or a day
on which banking institutions in Stockton, California, Chicago, Illinois, New York, New York, Seattle, Washington or St. Paul,
Minnesota or any city in which the Corporate Trust Office is located are authorized or obligated by law or executive order to be
closed.


Buydown Agreement: An agreement between a Person and a
Mortgagor pursuant to which such Person has provided a Buydown Fund.


Buydown Fund: A fund provided by the originator of a Mortgage
Loan or another Person with respect to a Buydown Loan which provides an amount sufficient to subsidize regularly scheduled
principal and interest payments due on such Buydown Loan for a period. Buydown Funds may be (i) funded at the par values of future
payment subsidies, or (ii) funded in an amount less than the par values of future payment subsidies, and determined by discounting
such par values in accordance with interest accruing on such amounts, in which event they will be deposited in an account bearing
interest. Buydown Funds may be held in a separate Buydown Fund Account or may be held in a Custodial Account for P&I or a
Custodial Account for Reserves and monitored by the Servicer.


Buydown Fund Account: A separate account or accounts created
and maintained pursuant to Section 3.02 (a) with the corporate trust department of the Trustee or another financial institution
approved by the Servicer, (b) within FDIC insured accounts (or other accounts with comparable insurance coverage acceptable to the
Rating Agencies) created, maintained and monitored by a Servicer or (c) in a separate non-trust account without FDIC or other
insurance in an Eligible Institution. Such account or accounts may be non-interest bearing or may bear interest. In the event that
a Buydown Fund Account is established pursuant to clause (b) of the preceding sentence, amounts held in such Buydown Fund Account
shall not exceed the level of deposit insurance coverage on such account; accordingly, more than one Buydown Fund Account may be
established.


Buydown Loan: A Mortgage Loan for which the Mortgage Interest
Rate has been subsidized through a Buydown Fund provided at the time of origination of such Mortgage Loan.


Cap Counterparty:  Bear Stearns
Financial Products Inc.


Carry-Forward Subsequent Recoveries Amount: For any
Distribution Date and any Loan Group, the excess, if any, of (i) the Subsequent Recoveries for such Distribution Date for such Loan
Group over (ii) the amount by which the Class Principal Balance of the Class of Subordinate Certificates with the lowest priority
is increased in respect of Subsequent Recoveries for such Loan Group on such Distribution Date pursuant to the definition of
“Class Principal Balance” herein.


Certificate: Any one of the Certificates issued pursuant to
this Agreement, executed by the Trustee and authenticated by or on behalf of the Trustee hereunder in substantially one of the
forms set forth in Exhibit A and B hereto. The additional matter appearing in Exhibit H shall be deemed incorporated into Exhibit A
as though set forth at the end of such Exhibit.


Certificate Account: The separate trust account created and
maintained with the Trustee, the Investment Depository or any other bank or trust company acceptable to the Rating Agencies which
is incorporated under the laws of the United States or any state thereof pursuant to Section 3.04, which account shall bear a
designation clearly indicating that the funds deposited therein are held in trust for the benefit of the Trust or any other account
serving a similar function acceptable to the Rating Agencies. Funds in the Certificate Account in respect of the Mortgage Loans in
each of the Loan Groups and amounts withdrawn from the Certificate Account attributable to each of such Loan Groups shall be
accounted for separately. Funds in the Certificate Account may be invested in Eligible Investments pursuant to Section 3.04(b) and
reinvestment earnings thereon shall be paid to the Servicer as additional servicing compensation. Funds deposited in the
Certificate Account (exclusive of the Servicing Fee) shall be held in trust for the Certificateholders and for the uses and
purposes set forth in Section 2.01, Section 3.04, Section 3.05, Section 4.01 and Section 4.04.


Certificate Group: The Group 1 Certificates or Group 2
Certificates, as applicable.


Certificateholder or Holder: With respect to the Certificates,
the Person in whose name a Certificate is registered in the Certificate Register, except that, solely for the purposes of giving
any consent pursuant to this Agreement, any Certificate registered in the name of the Company, the Servicer or any affiliate
thereof shall be deemed not to be outstanding and the Percentage Interest evidenced thereby shall not be taken into account in
determining whether the requisite percentage of Percentage Interests necessary to effect any such consent has been obtained;
provided, that the Trustee may conclusively rely upon an Officer’s Certificate to determine whether any Person is an
affiliate of the Company or the Servicer. With respect to the REMIC I Regular Interests, the owner of the REMIC I Regular
Interests, which as of the Closing Date shall be the Trust.


Certificate Interest Rate: For each Class of REMIC I Regular
Interests and REMIC II Regular Interests and the Class R-1 Residual Interest, the per annum rate set forth as the Certificate
Interest Rate for such Class in the Preliminary Statement hereto.


Certificate of Trust: The certificate of trust filed with
respect to the Trust with the Secretary of State in accordance with Section 3810(a) of the Statutory Trust Statute.


Certificate Principal Balance: For each Certificate of any
Class, the portion of the related Class Principal Balance, if any, represented by such Certificate.


Certificate Register and Certificate Registrar: The register
maintained and the registrar appointed, respectively, pursuant to Section 5.03.


Class: All REMIC I Regular Interests or the Class R-1 Residual
Interest having the same priority and rights to payments on the Mortgage Loans from the REMIC I Available Distribution Amount, and
all REMIC II Regular Interests or the Class R-2 Residual Interest having the same priority and rights to payments on the REMIC I
Regular Interests from the REMIC II Available Distribution Amount, as applicable, which REMIC I Regular Interests, REMIC II Regular
Interests and Class R Residual Interests, as applicable, shall be designated as a separate Class, and which, in the case of the
Certificates (including the Class R Certificates representing ownership of the Class R Residual Interests), shall be set forth in
the applicable forms of Certificates attached hereto as Exhibits A and B. Each Class of REMIC I Regular Interests and the Class R-1
Residual Interest shall be entitled to receive the amounts allocated to such Class pursuant to the definition of “REMIC I
Distribution Amount” only to the extent of the REMIC I Available Distribution Amount for such Distribution Date remaining
after distributions in accordance with prior clauses of the definition of “REMIC I Distribution Amount,” and each Class
of REMIC II Regular Interests and the Class R-2 Residual Interest shall be entitled to receive the amounts allocated to such Class
pursuant to the definition of “REMIC II Distribution Amount” only to the extent of the REMIC II Available Distribution
Amount for such Distribution Date remaining after distributions in accordance with prior clauses of the definition of “REMIC
II Distribution Amount.”


In addition to their right to receive payments from the REMIC II Available Distribution
Amount on the Class 1-CB-3-M Regular Interest and the Class 2-A-3-M Regular Interest, respectively, the Class 1-CB-3 and Class
2-A-3 Certificates shall be entitled to receive payments, if any, as specified in the second sentence of Section
4.04(a). 


Class 1-CB-1 Certificates: The Certificates designated as
“Class 1-CB-1” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 1-CB-1-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class 1-CB-2 Certificates: The Certificates designated as
“Class 1-CB-2” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 1-CB-2-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class 1-CB-3 Certificates: The Certificates designated as
“Class 1-CB-3” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 1-CB-3 Fraction: For any Distribution Date, a fraction,
the numerator of which is the Certificate Interest Rate for the Class 1-CB-3-M Regular Interest for such Distribution Date and the
denominator of which is 5.500%.


Class 1-CB-3-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class 1-CB-3-M Regular Interest:  The uncertificated
undivided beneficial interest in REMIC II which constitutes a REMIC II Regular Interest and is entitled to distributions as set
forth herein.


Class 1-CB-4 Certificates: The Certificates designated as
“Class 1-CB-4” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 1-CB-4 Notional Amount:  For any
Distribution Date, the Class 1-CB-3 Principal Balance immediately before that Distribution Date.


Class 1-CB-5 Certificates: The Certificates designated as
“Class 1-CB-5” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 1-CB-5-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class 1-CB-6 Certificates: The Certificates designated as
“Class 1-CB-6” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 1-CB-6-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class 1-P Fraction: For each Class 1-P Mortgage Loan, a
fraction, the numerator of which is 5.500% less the Pass-Through Rate on such Class 1-P Mortgage Loan and the denominator of which
is 5.500%.


Class 1-P Mortgage Loan: Any Group 1 Loan with a Pass-Through
Rate of less than 5.500% per annum.


Class 2-A-1 Certificates: The Certificates designated as
“Class 2-A-1” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 2-A-1-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class 2-A-2 Certificates: The Certificates designated as
“Class 2-A-2” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 2-A-2-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class 2-A-3 Certificates: The Certificates designated as
“Class 2-A-3” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 2-A-3-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class 2-A-3-M Regular Interest:  The uncertificated
undivided beneficial interest in REMIC II which constitutes a REMIC II Regular Interest and is entitled to distributions as set
forth herein.


Class 2-A-4 Certificates: The Certificates designated as
“Class 2-A-4” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 2-A-4 Notional Amount:  For any
Distribution Date, the Class 2-A-3 Principal Balance immediately before that Distribution Date.


Class 2-A-5 Certificates: The Certificates designated as
“Class 2-A-5” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 2-A-5-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class 2-A-6 Certificates: The Certificates designated as
“Class 2-A-6” on the face thereof in substantially the form attached hereto as Exhibit A.


Class 2-A-6-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class 2-P Fraction: For each Class 2-P Mortgage Loan, a
fraction, the numerator of which is 5.500% less the Pass-Through Rate on such Class 2-P Mortgage Loan and the denominator of which
is 5.500%.


Class 2-P Mortgage Loan: Any Group 2 Loan with a Pass-Through
Rate of less than 5.500% per annum.


Class A Certificates: The Group 1-A and Group 2-A
Certificates.


Class A-L Regular Interests:  The Group 1-A-L and Group
2-A-L Regular Interests.


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


Class B-L Regular Interests: The Class B-1-L, Class B-2-L,
Class B-3-L, Class B-4-L, Class B-5-L and Class B-6-L Regular Interests.


Class B Percentage: For any date of determination, the
aggregate Class Principal Balance of the Class B Certificates divided by the then outstanding aggregate Principal Balance of the
Mortgage Loans.


Class B-1 Certificates: The Certificates designated as
“Class B-1” on the face thereof in substantially the form attached hereto as Exhibit A.


Class B-1-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class B-2 Certificates: The Certificates designated as
“Class B-2” on the face thereof in substantially the form attached hereto as Exhibit A.


Class B-2-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class B-3 Certificates: The Certificates designated as
“Class B-3” on the face thereof in substantially the form attached hereto as Exhibit A.


Class B-3-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class B-4 Certificates: The Certificates designated as
“Class B-4” on the face thereof in substantially the form attached hereto as Exhibit A.


Class B-4-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class B-5 Certificates: The Certificates designated as
“Class B-5” on the face thereof in substantially the form attached hereto as Exhibit A.


Class B-5-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class B-6 Certificates: The Certificates designated as
“Class B-6” on the face thereof in substantially the form attached hereto as Exhibit A.


Class B-6-L Regular Interest:  The uncertificated
undivided beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class C-P Certificates: The Certificates designated as
“Class C-P” on the face thereof in substantially the form attached hereto as Exhibit A.


Class C-P-L Regular Interest: The uncertificated undivided
beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class C-X Certificates: The Certificates designated as
“Class C-X” on the face thereof in substantially the form attached hereto as Exhibit A.


Class C-X-L Regular Interest: The uncertificated undivided
beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class C-X Notional Amount: With respect to any Distribution
Date, the product of (x) the aggregate scheduled principal balance, as of the second preceding Due Date after giving effect to
payments scheduled to be received as of such Due Date, whether or not received (and after giving effect to Principal Prepayments,
Monthly P&I Advances and the principal portion of Realized Losses applied prior to such Due Date), or with respect to the
initial Distribution Date, as of the Cut-Off Date, of the Group 1 Premium Rate Mortgage Loans and the Group 2 Premium Rate Mortgage
Loans and (y) a fraction, the numerator of which is the weighted average of the Stripped Interest Rates for Group 1 Premium Rate
Mortgage Loans and the Group 2 Premium Rate Mortgage Loans as of such Due Date and the denominator of which is 5.500%.


Class C-X-L Regular Interest: The uncertificated undivided
beneficial interest in REMIC I which constitutes a REMIC I Regular Interest and is entitled to distributions as set forth
herein.


Class Notional Amount:  With respect to any of the Class
1-CB-4, Class 2-A-4 and Class C-X Certificates and the Class C-X-L Regular Interest, the related notional amount for such Class, as
specified herein (e.g., the “Class Notional Amount” for the Class C-X Certificates and the Class C-X-L Regular Interest
is the Class C-X Notional Amount).


Class P Certificates: The Class C-P Certificates. As such term
is used herein, the Class C-P Certificates are “related” to the (i) Class 1-P Mortgage Loans and (ii) Class 2-P
Mortgage Loans.


Class P Fraction: Any Class 1-P or Class 2-P Fraction, as
applicable.


Class P Mortgage Loan: Any of the Class 1-P or Class 2-P
Mortgage Loans.


Class P-L Regular Interests: The Class C-P-L Regular Interests.
As such term is used herein, the Class C-P-L Regular Interest is “related” to the Class 1-P and Class 2-P Mortgage
Loans.


Class Principal Balance: For any Class of REMIC I or REMIC II
Regular Interests and for the Class R-1 Residual Interest, the applicable initial Class Principal Balance therefor set forth in the
Preliminary Statement hereto (or, in the case of the Class R Certificates, the Class Principal Balance of the Class R-1 Residual
Interest), corresponding to the rights of such Class in payments of principal due to be passed through to the Holders of such Class
from principal payments on the Mortgage Loans or the REMIC I Regular Interests, as applicable, as reduced from time to time by (x)
distributions of principal to the Holders of such Class and (y) the portion of Realized Losses allocated to the Class Principal
Balance of such Class pursuant to the definition of “Realized Loss” (including amounts allocated as losses to the Class
B Certificates and the Class B-L Regular Interests pursuant to the third paragraph of the definition of
“Realized Loss”) with respect to a given Distribution Date. For any Distribution Date, the reduction of the Class
Principal Balance of any Class of REMIC I or REMIC II Regular Interests pursuant to the definition of “Realized Loss”
shall be deemed effective after the determination and distribution of principal on such Class pursuant to the definitions of
“REMIC I Distribution Amount” and “REMIC II Distribution Amount.”


Notwithstanding the foregoing, (A) any amounts distributed in respect of losses pursuant
to paragraph (I)(c)(i) or (I)(c)(ii) of the definition of “REMIC I Distribution Amount” shall not cause a reduction in
the Class Principal Balance of the Class P Certificates or the Class P-L Regular Interests and (B) any
amounts distributed in respect of principal losses pursuant to paragraph (I)(c)(xxi) of the definition of “REMIC I
Distribution Amount” shall not cause a reduction in the Class Principal Balances of the REMIC I Regular Interests or their Corresponding Classes.


In addition to the foregoing, on each Distribution Date, the Class
Principal Balance of the Class of Class B Certificates with the lowest priority then outstanding (and of its Corresponding Class) shall be increased by an amount, for each Loan Group, equal to the lesser of (i) the Subsequent
Recoveries for such Distribution Date for such Loan Group and (ii) the amount of Realized Losses for Mortgage Loans in such Loan
Group allocated to such Class on previous Distribution Dates (the amount in this clause (ii) reduced by the amount, if any, by
which such Class Principal Balance has been increased on prior Distribution Dates pursuant to this paragraph in respect of
Subsequent Recoveries for such Loan Group).


The Class Principal Balance for the Class 1-CB-1 Certificates shall be referred to as the
“Class 1-CB-1 Principal Balance,” the Class Principal Balance for the Class 1-CB-1-L Regular
Interest shall be referred to as the “Class 1-CB-1-L Principal Balance” and so on.  The Class Principal
Balances for the Class 1-CB-4, Class 2-A-4 and Class X Certificates and the Class X-L Regular Interest shall each be
zero.


Class R Certificates: The Certificates designated as
“Class R” on the face thereof in substantially the form attached hereto as Exhibit B, representing ownership of the
Class R-1 and Class R-2 Residual Interests, each of which Class of Residual Interests has been designated as the sole class of
“residual interest” in REMIC I and REMIC II, respectively, pursuant to Section 2.06 and Section 2.11, respectively, for
purposes of Section 860G(a)(2) of the Code.


Class R Residual Interests: The Class R-1 and Class R-2
Residual Interests (which shall be transferable only as a unit evidenced by the Class R Certificates, in accordance with the
applicable provisions of Section 5.01).


Class R-1 Residual Interest: The uncertificated undivided
beneficial interest in REMIC I which has been designated as the single class of “residual interest” in REMIC I pursuant
to Section 2.06.  The Class R-1 Residual Interest, together with the REMIC I Regular Interests, shall be deemed to be a
separate series of beneficial interests in the assets of the Trust consisting of the REMIC I Assets pursuant to Section 3806(b)(2)
of the Statutory Trust Statute.


Class R-2 Residual Interest: The uncertificated undivided
beneficial interest in REMIC II which has been designated as the single class of “residual interest” in REMIC II
pursuant to Section 2.11.  The Class R-2 Residual Interest, together with the REMIC II Regular Interests, shall be deemed to
be a separate series of beneficial interests in the assets of the Trust consisting of the REMIC II Assets pursuant to Section
3806(b)(2) of the Statutory Trust Statute.


Class X Certificates: The Class C-X Certificates.


Class X-L Regular Interest: The Class C-X-L Regular
Interest.


Clean-Up Call Percentage: 10%.


Clearing Agency: An organization registered as a
“clearing agency” pursuant to Section 17A of the Securities Exchange Act of 1934, as amended, which initially shall be
DTC.


Closing Date: April 26, 2005, which is the date of settlement
of the sale of the Certificates to the original purchasers thereof.


Closing Date Loan-to-Value Ratio: For each Mortgage Loan, the
principal balance of such Mortgage Loan as of the Cut-Off Date (after application of all scheduled principal payments due on or
before the Cut-Off Date) divided by the value of the related Mortgaged Property as of the Closing Date.


Code: The Internal Revenue Code of 1986, as amended.


Company: Washington Mutual Mortgage Securities Corp., a
Delaware corporation, or its successor-in-interest.


Compensating Interest: For any Distribution Date with respect
to each Loan Group and the Mortgage Loans contained therein, the least of (i) the sum of (a) 1/12 of 0.050% of
the aggregate Principal Balance of the Mortgage Loans for such Loan Group for such Distribution Date, (b) the aggregate
Payoff Earnings with respect to such Loan Group for such Distribution Date and (c) the aggregate Payoff Interest with respect to
such Loan Group for such Distribution Date; (ii) the aggregate Uncollected Interest with respect to such Loan Group for such
Distribution Date and (iii) 1/12 of 0.125% of the aggregate Principal Balance of the Mortgage Loans contained in such Loan
Group immediately preceding such Distribution Date.


Cooperative: A private, cooperative housing corporation which
owns or leases land and all or part of a building or buildings, including apartments, spaces used for commercial purposes and
common areas therein and whose board of directors authorizes, among other things, the sale of Cooperative Stock.


Cooperative Apartment: A dwelling unit in a multi-dwelling
building owned or leased by a Cooperative, which unit the Mortgagor has an exclusive right to occupy pursuant to the terms of a
proprietary lease or occupancy agreement.


Cooperative Lease: With respect to a Cooperative Loan, the
proprietary lease or occupancy agreement with respect to the Cooperative Apartment occupied by the Mortgagor and relating to the
related Cooperative Stock, which lease or agreement confers an exclusive right to the holder of such Cooperative Stock to occupy
such apartment.


Cooperative Loans:  Any of the Mortgage Loans made in
respect of a Cooperative Apartment, evidenced by a Mortgage Note and secured by (i) a Security Agreement, (ii) the related
Cooperative Stock Certificate, (iii) an assignment or mortgage of the Cooperative Lease, (iv) financing statements and (v) a stock
power (or other similar instrument), and ancillary thereto, a Recognition Agreement, each of which was transferred and assigned to
the Trust pursuant to Section 2.04.


Cooperative Stock:  With respect to a Cooperative Loan,
the single outstanding class of stock, partnership interest or other ownership instrument in the related Cooperative.


Cooperative Stock Certificate:  With respect to a
Cooperative Loan, the stock certificate or other instrument evidencing the related Cooperative Stock.


Corporate Trust Office: The corporate trust office of the
Trustee, at which at any particular time its corporate trust business with respect to this Agreement shall be administered, which
office at the date of the execution of this Agreement is located at 135 South LaSalle Street, Suite 1625, Chicago, Illinois, 60603,
Attention: Global Securities and Trust Services – WMALT Series 2005-3.


Corporation: Any Person (other than an individual, partnership,
joint venture or unincorporated organization) incorporated, associated, organized, chartered or existing under the laws of any
state or under the federal laws of the United States of America; provided, that such Person have indefinite existence under
the law of its domicile.


Corresponding Class: With respect to the REMIC I Regular
Interests and the REMIC II Regular Interests, the “Corresponding Class” shall be as indicated in the following
table:



	
Class 1-CB-1-L

	
 

	
 

	
Class 1-CB-1


	
Class 1-CB-2-L

	
 

	
 

	
Class 1-CB-2


	
Class 1-CB-3-L

	
 

	
 

	
Class 1-CB-3-M


	
Class 1-CB-5-L

	
 

	
 

	
Class 1-CB-5


	
Class 1-CB-6-L

	
 

	
 

	
Class 1-CB-6


	
Class 2-A-1-L

	
 

	
 

	
Class 2-A-1


	
Class 2-A-2-L

	
 

	
 

	
Class 2-A-2


	
Class 2-A-3-L

	
 

	
 

	
Class 2-A-3-M


	
Class 2-A-5-L

	
 

	
 

	
Class 2-A-5


	
Class 2-A-6-L

	
 

	
 

	
Class 2-A-6


	
Class C-P-L

	
 

	
 

	
Class C-P


	
Class C-X-L

	
 

	
 

	
Class C-X


	
Class B-1-L

	
 

	
 

	
Class B-1


	
Class B-2-L

	
 

	
 

	
Class B-2


	
Class B-3-L

	
 

	
 

	
Class B-3


	
Class B-4-L

	
 

	
 

	
Class B-4


	
Class B-5-L

	
 

	
 

	
Class B-5


	
Class B-6-L

	
 

	
 

	
Class B-6







 


Credit Support Depletion Date: The first Distribution Date on
which the aggregate Class Principal Balance of the Class B Certificates has been or will be reduced to zero as a result of
principal distributions thereon and the allocation of Realized Losses on such Distribution Date.


Cumulative Carry-Forward Subsequent Recoveries Amount: For any
Distribution Date and any Loan Group, the sum of (i) the Carry-Forward Subsequent Recoveries Amount for such Distribution Date for
such Loan Group and (ii) the Carry-Forward Subsequent Recoveries Amounts for prior Distribution Dates for such Loan Group to the
extent such Carry-Forward Subsequent Recoveries Amounts have not been applied in reduction of Realized Losses on prior Distribution
Dates pursuant to the first paragraph of the definition of “Realized Loss” herein.


Curtailment: Any payment of principal on a Mortgage Loan, made
by or on behalf of the related Mortgagor, other than a Monthly Payment, a Prepaid Monthly Payment or a Payoff, which is applied to
reduce the outstanding principal balance of the Mortgage Loan. (Prepayment penalties are not payments of principal and hence
Curtailments do not include prepayment penalties.)


Curtailment Shortfall: For any Distribution Date and for any
Curtailment applied with a Monthly Payment in the Prior Period other than a Prepaid Monthly Payment, an amount equal to one
month’s interest on such Curtailment at the applicable Pass-Through Rate on such Mortgage Loan.


Custodial Account for P&I: The custodial account for
principal and interest established and maintained by the Servicer pursuant to Section 3.02 either (a) with the corporate trust
department of the Trustee or another financial institution approved by the Servicer such that the rights of the Servicer, the
Trustee, the Trust, the Delaware Trustee and the Certificateholders thereto shall be fully protected against the claims of any
creditors or depositors of the institution in which such account is maintained, (b) within FDIC insured accounts (or other accounts
with comparable insurance coverage acceptable to the Rating Agencies) created, maintained and monitored by the Servicer or (c) as a
separate account at an Eligible Institution. In the event that a Custodial Account for P&I is established pursuant to clause
(b) of the preceding sentence, amounts held in such Custodial Account for P&I shall not exceed the level of deposit insurance
coverage on such account; accordingly, more than one Custodial Account for P&I may be established. Any amount that is at any
time not protected or insured to the extent, if any, required by the first sentence of this definition of “Custodial Account
for P&I” shall promptly be withdrawn from such Custodial Account for P&I and be remitted to the Investment
Account.  In the event that a Custodial Account for P&I is established pursuant to clause (c) it shall be entitled
"Washington Mutual Bank in trust for holders of Washington Mutual Mortgage Pass-Through Certificates, WMALT Series 2005-3."


Custodial Account for Reserves: The custodial account for
reserves established and maintained by the Servicer pursuant to Section 3.02 either (a) with the corporate trust department of the
Trustee or another financial institution approved by the Servicer such that the rights of the Servicer, the Trustee, the Trust, the
Delaware Trustee and the Certificateholders thereto shall be fully protected against the claims of any creditors or depositors of
the institution in which such account is maintained, (b) within FDIC insured accounts (or other accounts with comparable insurance
coverage acceptable to the Rating Agencies) created, maintained and monitored by the Servicer or (c) as a separate account at an
Eligible Institution. In the event that a Custodial Account for Reserves is established pursuant to clause (b) of the preceding
sentence, amounts held in such Custodial Account for Reserves shall not exceed the level of deposit insurance coverage on such
account; accordingly, more than one Custodial Account for Reserves may be established. Any amount that is at any time not protected
or insured to the extent, if any, required the first sentence of this definition of “Custodial Account for Reserves”
shall promptly be withdrawn from such Custodial Account for Reserves and be remitted to the Investment Account.  In the event
that a Custodial Account for Reserves is established pursuant to clause (c) it shall be entitled " Washington Mutual Bank in trust
for various mortgagors and/or holders of Washington Mutual Mortgage Pass-Through Certificates, WMALT Series 2005-3."


Custodial Agreement: The agreement, if any, between the Trustee
and a Custodian (or the Trustee, a Custodian and the Servicer) providing for the safekeeping of the Mortgage Files on behalf of the
Trust.


Custodian: A custodian (which may be the institution serving as
Trustee) that is appointed by the Trustee with the consent of the Servicer, as provided in Article II hereof, pursuant to a
Custodial Agreement. Any Custodian so appointed shall act as agent on behalf of the Trustee.  The reasonable fees and expenses
of the Custodian shall be paid by the Servicer. The Trustee shall remain at all times responsible under the terms of this
Agreement, notwithstanding the fact that certain duties have been assigned to a Custodian.


Cut-Off Date: April 1, 2005.


Definitive Certificates: Certificates in definitive, fully
registered and certificated form.


Delaware Trustee: Christiana Bank & Trust Company, or its
successor-in-interest as provided in Section 8.09, or any successor trustee appointed as herein provided.


Depositary Agreement: The Letter of Representations, dated
April 25, 2005 by and among DTC, the Trust and the Trustee. The Trustee is authorized to enter into the Depositary Agreement on
behalf of the Trust.


Destroyed Mortgage Note: A Mortgage Note the original of which
(or a portion of the original of which) was permanently lost or destroyed and has not been replaced.


Determination Date: A day not later than the 10th day preceding
a related Distribution Date, as determined by the Servicer.


Disqualified Organization:  Any Person which is not a
Permitted Transferee, but does not include any Pass-Through Entity which owns or holds a Residual Certificate and of which a
Disqualified Organization, directly or indirectly, may be a stockholder, partner or beneficiary.


Distribution Date: With respect to distributions on the REMIC I
and REMIC II Regular Interests and the Certificates, the 25th day (or, if such 25th day is not a Business Day, the Business Day
immediately succeeding such 25th day) of each month, with the first such date being May 25, 2005.  The “related Due
Date” for any Distribution Date is the Due Date immediately preceding such Distribution Date.


DTC: The Depository Trust Company.


DTC Participant: A broker, dealer, bank, other financial
institution or other Person for whom DTC effects book-entry transfers and pledges of securities deposited with DTC.


Due Date: The day on which the Monthly Payment for each
Mortgage Loan is due.


Eligible Institution: An institution having (i) the highest
short-term debt rating, and one of the two highest long-term debt ratings of the Rating Agencies, (ii) with respect to any
Custodial Account for P&I and special Custodial Account for Reserves, an unsecured long-term debt rating of at least one of the
two highest unsecured long-term debt ratings of the Rating Agencies, (iii) with respect to any Buydown Fund Account or Custodial
Account which also serves as a Buydown Fund Account, the highest unsecured long-term debt rating by the Rating Agencies, or (iv)
the approval of the Rating Agencies. Notwithstanding the foregoing, Washington Mutual Bank shall be an “Eligible
Institution” if the following conditions are satisfied: (i) Washington Mutual Bank is acting as Servicer, (ii) if S&P is
a Rating Agency as defined herein, the long-term unsecured debt obligations of Washington Mutual Bank are rated no lower than
“A-” by S&P and the short-term unsecured debt obligations of Washington Mutual Bank are rated no lower than
“A-2” by S&P, (iii) if Fitch is a Rating Agency as defined herein, the long-term unsecured debt obligations of
Washington Mutual Bank are rated no lower than “A” by Fitch and the short-term unsecured debt obligations of Washington
Mutual Bank are rated no lower than “F1” by Fitch and (iv) if Moody’s is a Rating Agency as defined herein, the
long-term unsecured debt obligations of Washington Mutual Bank are rated no lower than “A2” by Moody’s and the
short-term unsecured debt obligations of Washington Mutual Bank are rated no lower than “P-1” by Moody’s;
provided, that if the long-term or short-term unsecured debt obligations of Washington Mutual Bank are downgraded by any of
the Rating Agencies to a rating lower than the applicable rating specified in this sentence, Washington Mutual Bank shall cease to
be an “Eligible Institution” ten Business Days after notification of such downgrade.


Eligible Investments: Any one or more of the obligations or
securities listed below in which funds deposited in the Investment Account, the Certificate Account, the Custodial Account for
P&I and the Custodial Account for Reserves may be invested:


(i)                  Obligations of,
or guaranteed as to principal and interest by, the United States or any agency or instrumentality thereof when such obligations are
backed by the full faith and credit of the United States;


(ii)                Repurchase agreements on
obligations described in clause (i) of this definition of “Eligible Investments,” provided that the unsecured
obligations of the party (including the Trustee in its commercial capacity) agreeing to repurchase such obligations have at the
time one of the two highest short term debt ratings  of the Rating Agencies and provided that such repurchaser’s
unsecured long term debt has one of the two highest unsecured long term debt ratings of the Rating Agencies;


(iii)               Federal funds, certificates of
deposit, time deposits and bankers’ acceptances of LaSalle Bank or any trust company incorporated under the laws of the
United States or any state (including the Trustee in its commercial capacity), provided that the debt obligations of such bank or
trust company (or, in the case of the principal bank in a bank holding company system, debt obligations of the bank holding
company) at the date of acquisition thereof have one of the two highest short term debt ratings of the Rating Agencies and
unsecured long term debt has one of the two highest unsecured long term debt ratings of the Rating Agencies;


(iv)              Obligations of, or obligations guaranteed
by, any state of the United States or the District of Columbia, provided that such obligations at the date of acquisition thereof
shall have the highest long-term debt ratings available for such securities from the Rating Agencies;


(v)                Commercial paper of any
corporation incorporated under the laws of the United States or any state thereof, which on the date of acquisition has the highest
commercial paper rating of the Rating Agencies, provided that the corporation has unsecured long term debt that has one of the two
highest unsecured long term debt ratings of the Rating Agencies;


(vi)              Securities (other than stripped bonds or
stripped coupons) bearing interest or sold at a discount that are issued by any corporation incorporated under the laws of the
United States or any state thereof and have the highest long-term unsecured rating available for such securities from the Rating
Agencies; provided, however, that securities issued by any such corporation will not be investments to the extent that investment
therein would cause the outstanding principal amount of securities issued by such corporation that are then held as part of the
Investment Account or the Certificate Account to exceed 20% of the aggregate principal amount of all Eligible Investments then held
in the Investment Account and the Certificate Account; and


(vii)             Units of taxable money market funds (which may
be 12b-1 funds, as contemplated under the rules promulgated by the Securities and Exchange Commission under the Investment Company
Act of 1940), which funds have the highest rating available for such securities from the Rating Agencies or which have been
designated in writing by the Rating Agencies as Eligible Investments;


provided, however, that such obligation or security is held for a temporary
period pursuant to Section 1.860G-2(g)(1) of the Treasury Regulations, and that such period can in no event exceed thirteen
months.


In no event shall an instrument be an Eligible Investment if such instrument (a) evidences
a right to receive only interest payments with respect to the obligations underlying such instrument or (b) has been purchased at a
price greater than the outstanding principal balance of such instrument.


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


ERISA Restricted Certificate: Any Senior Subordinate
Certificate.


Event of Default: Any event of default as specified in Section
7.01.


Excess Liquidation Proceeds: With respect to any Distribution
Date, the sum of (i) the excess, if any, of aggregate Liquidation Proceeds received during the Prior Period over the amount that
would have been received if Payoffs had been made with respect to such Mortgage Loans on the date such Liquidation Proceeds were
received and (ii) any Excess Subsequent Recoveries for any Loan Group for such Distribution Date.


Excess Subsequent Recoveries: For any Distribution Date and any
Loan Group, the excess, if any, of (i) amounts received by the Servicer during the Prior Period (after deduction of amounts
reimbursable under Section 3.05(a)(i) and (ii)) in connection with the liquidation of defaulted Mortgage Loans in such Loan Group
after such Mortgage Loans became Liquidated Mortgage Loans over (ii) the Subsequent Recoveries for such Distribution Date for such
Loan Group.


Fannie Mae: The entity formerly known as the Federal National
Mortgage Association, or any successor thereto.


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


FHA: Federal Housing Administration, or any successor
thereto.


Final Maturity Date:   With respect to each Class of the
REMIC I Regular Interests and the Certificates, the date set forth in the applicable table contained in the Preliminary Statement
hereto.


Final Yield Maintenance Payment Date: For the Class 1-CB-3
Certificates, the Distribution Date in June 2016; and for the Class 2-A-3 Certificates, the Distribution Date in July 2012.


Fitch: Fitch Ratings, provided that at any time it be a Rating
Agency.


Freddie Mac: The entity formerly known as the Federal Home Loan
Mortgage Corporation, or any successor thereto.


Group 1 Certificates: The Group 1-A Certificates.


Group 1 Loans:  The Mortgage Loans designated on the
Mortgage Loan Schedule as Group 1 Loans.


Group 1 Lockout Adjusted Percentage: (i)
For any Distribution Date occurring before May 2010, 0% and (ii) for any Distribution Date occurring in or after May 2010, the
Group 1 Lockout Percentage.


Group 1 Lockout Liquidation Amount: For any
Distribution Date, the aggregate, for each Group 1 Loan which became a Liquidated Mortgage Loan during the Prior Period, of the
lesser of (i) the Group 1 Lockout Adjusted Percentage of the Principal Balance of such Mortgage Loan (exclusive of the
Class 1-P Fraction thereof, with respect to any Class 1-P Mortgage Loan) and (ii) the Group 1 Lockout
Adjusted Percentage of the Liquidation Principal with respect to such Mortgage Loan.


Group 1 Lockout Percentage: For any
Distribution Date, the lesser of (i) 100% and (ii) the aggregate Class Principal Balance of the Class 1-CB-1 and Class 1-CB-2
Certificates, divided by the aggregate Principal Balance of the Group 1 Loans (exclusive of the Class 1-P Fraction thereof,
with respect to any Class 1-P Mortgage Loan), in each case immediately before such Distribution
Date.


Group 1 Lockout Prepayment Percentage: For
any Distribution Date, the product of (i) the Group 1 Lockout Percentage and (ii) the Step Down Percentage.


Group 1 Lockout Priority Amount: For any
Distribution Date, the sum of (i) the Group 1 Lockout Adjusted Percentage of the Principal Payment Amount for Loan Group
1 (exclusive of the portion thereof attributable to principal distributions to the Class C-P-L Regular Interest pursuant to
clauses (I)(a)(i) and (II)(a)(i) of the definition of “REMIC I Distribution Amount”), (ii) the
Group 1 Lockout Prepayment Percentage of the Principal Prepayment Amount for Loan Group 1 (exclusive of the portion thereof
attributable to principal distributions to the Class C-P-L Regular Interest pursuant to clauses (I)(a)(i) and (II)(a)(i) of the
definition of “REMIC I Distribution Amount”) and (iii) the Group 1 Lockout Liquidation
Amount.


Group 1 Premium Rate Mortgage Loans:  The Group 1 Loans
having Pass-Through Rates greater than or equal to 5.500% per annum.


Group 1 Senior Liquidation Amount: For any Distribution Date,
the sum of (A) the aggregate, for each Group 1 Loan which became a Liquidated Mortgage Loan during the Prior Period, of the lesser
of: (i) the Group 1 Senior Percentage of the Principal Balance of such Mortgage Loan (exclusive of the Class 1-P Fraction thereof,
with respect to any Class 1-P Mortgage Loan) and (ii) the Group 1 Senior Prepayment Percentage of the Liquidation Principal with
respect to such Mortgage Loan and (B) the Group 1 Senior Prepayment Percentage of any Subsequent Recoveries for Loan Group 1 for
such Distribution Date.


Group 1 Senior Percentage: For any Distribution Date, the
lesser of (i) 100% and (ii) the aggregate Class Principal Balance of the Group 1-A Certificates and Residual Certificates divided
by the aggregate Principal Balance of the Group 1 Loans (exclusive of the Class 1-P Fraction thereof with respect to any Class 1-P
Mortgage Loan), in each case immediately before such Distribution Date.


Group 1 Senior Prepayment Percentage or Group 2 Senior Prepayment
Percentage : For any Distribution Date, each of the Group 1 Senior Prepayment Percentage and
Group 2 Senior Prepayment Percentage shall equal 100%, unless (i) the Group 1 Senior Percentage for such Distribution Date is less
than or equal to the Group 1 Senior Percentage as of the Closing Date and the Group 2 Senior Percentage for such Distribution Date
is less than or equal to the Group 2 Senior Percentage as of the Closing Date, (ii) such Distribution Date occurs on or after the
fifth anniversary of the first Distribution Date and (iii) the following tests specified in clauses (a) through (d) are met with
respect to each of Loan Group 1 and Loan Group 2:


(a)        the mean aggregate Principal Balance as of
the Distribution Date in each of the immediately preceding six calendar months of the Group 1 Loans which were 60 or more days
delinquent as of such date (including Mortgage Loans in bankruptcy or foreclosure and Mortgaged Properties held by REMIC I) is less
than or equal to 50% of the Subordinate Component Balance for Loan Group 1 as of the current Distribution Date,


(b)        the mean aggregate Principal Balance as of
the Distribution Date in each of the immediately preceding six calendar months of the Group 2 Loans which were 60 or more days
delinquent as of such date (including Mortgage Loans in bankruptcy or foreclosure and Mortgaged Properties held by REMIC I) is less
than or equal to 50% of the Subordinate Component Balance for Loan Group 2 as of the current Distribution Date,


(c)        cumulative Realized Losses on the Group 1
Loans allocated to the Class B Certificates, as a percentage of the Subordinate Component Balance for Loan Group 1 as of the
Closing Date, are less than or equal to, for any Distribution Date (1) before the sixth anniversary of the first Distribution Date,
30%, (2) on or after the sixth anniversary but before the seventh anniversary of the first Distribution Date, 35%, (3) on or after
the seventh anniversary but before the eighth anniversary of the first Distribution Date, 40%, (4) on or after the eighth
anniversary but before the ninth anniversary of the first Distribution Date, 45%, and (5) on or after the ninth anniversary of the
first Distribution Date, 50%, and


(d)        cumulative Realized Losses on the Group 2
Loans allocated to the Class B Certificates, as a percentage of the Subordinate Component Balance for Loan Group 2 as of the
Closing Date, are less than or equal to, for any Distribution Date (1) before the sixth anniversary of the first Distribution Date,
30%, (2) on or after the sixth anniversary but before the seventh anniversary of the first Distribution Date, 35%, (3) on or after
the seventh anniversary but before the eighth anniversary of the first Distribution Date, 40%, (4) on or after the eighth
anniversary but before the ninth anniversary of the first Distribution Date, 45%, and (5) on or after the ninth anniversary of the
first Distribution Date, 50%,


in which case the Group 1 Senior Prepayment Percentage and Group 2 Senior Prepayment
Percentage shall be calculated as follows: (1) for any such Distribution Date on or after the fifth anniversary but before the
sixth anniversary of the first Distribution Date, the Group 1 Senior Percentage or Group 2 Senior Percentage, as applicable, for
such Distribution Date plus 70% of the Subordinate Percentage for the related Loan Group for such Distribution Date; (2) for any
such Distribution Date on or after the sixth anniversary but before the seventh anniversary of the first Distribution Date, the
Group 1 Senior Percentage or Group 2 Senior Percentage, as applicable, for such Distribution Date plus 60% of the Subordinate
Percentage for the related Loan Group for such Distribution Date; (3) for any such Distribution Date on or after the seventh
anniversary but before the eighth anniversary of the first Distribution Date, the Group 1 Senior Percentage or Group 2 Senior
Percentage, as applicable, for such Distribution Date plus 40% of the Subordinate Percentage for the related Loan Group for such
Distribution Date; (4) for any such Distribution Date on or after the eighth anniversary but before the ninth anniversary of the
first Distribution Date, the Group 1 Senior Percentage or Group 2 Senior Percentage, as applicable, for such Distribution Date plus
20% of the Subordinate Percentage for the related Loan Group for such Distribution Date; and (5) for any such Distribution Date
thereafter, the Group 1 Senior Percentage or Group 2 Senior Percentage, as applicable, for such Distribution Date.


If on any Distribution Date the allocation to the Group 1-A-L or Group 2-A-L Regular
Interests of Principal Prepayments in the percentage required would reduce the Class Principal Balance of such Regular Interests
below zero, the Group 1 Senior Prepayment Percentage or Group 2 Senior Prepayment Percentage, as applicable, for such Distribution
Date shall be limited to the percentage necessary to reduce such Class Principal Balance to zero. Notwithstanding the foregoing,
however, on each Distribution Date, the Class C-P-L Regular Interest shall receive the applicable (i) Class 1-P Fraction of
all principal payments, including, without limitation, Principal Prepayments, received in respect of Class 1-P Mortgage Loans and
(ii) Class II-P Fraction of all principal payments, including, without limitation, Principal Prepayments, received in respect
of Class II-P Mortgage Loans.


Group 1 Senior Principal Distribution Amount: For any
Distribution Date, an amount equal to the sum of (a) the Group 1 Senior Percentage of the Principal Payment Amount for Loan Group 1
(exclusive of the portion thereof attributable to principal distributions to the Class C-P-L Regular Interest pursuant to clauses
(I)(a)(i) and (II)(a)(i) of the definition of “REMIC I Distribution Amount”), (b) the Group 1 Senior Prepayment
Percentage of the Principal Prepayment Amount for Loan Group 1 (exclusive of the portion thereof attributable to principal
distributions to the Class C-P-L Regular Interest pursuant to clauses (I)(a)(i) and (II)(a)(i) of the definition of “REMIC I
Distribution Amount”) and (c) the Group 1 Senior Liquidation Amount.


Group 1 Subordinate Percentage: For any Distribution Date, the
excess of 100% over the Group 1 Senior Percentage for such date.


Group 1 Subordinate Prepayment Percentage: For any Distribution
Date, the excess of 100% over the Group 1 Senior Prepayment Percentage for such Distribution Date; provided, however, that
if the aggregate Class Principal Balance of the Group 1-A Certificates and Residual Certificates has been reduced to zero, then the
Group 1 Subordinate Prepayment Percentage shall equal 100%.


Group 1-A Certificates: The Class 1-CB-1, Class 1-CB-2, Class
1-CB-3, Class 1-CB-4, Class 1-CB-5 and Class 1-CB-6 Certificates.


Group 1-A-L Regular Interests: The Class 1-CB-1-L, Class
1-CB-2-L, Class 1-CB-3-L, Class 1-CB-5-L and Class 1-CB-6-L Regular Interests.


Group 1-L Regular Interests: The Group 1-A-L Regular
Interests.


Group 2 Certificates: The Group 2-A Certificates.


Group 2 Loans:  The Mortgage Loans designated on the
Mortgage Loan Schedule as Group 2 Loans.


Group 2 Lockout Adjusted Percentage: (i)
For any Distribution Date occurring before May 2010, 0% and (ii) for any Distribution Date occurring in or after May 2010, the
Group 2 Lockout Percentage.


Group 2 Lockout Liquidation Amount: For any
Distribution Date, the aggregate, for each Group 2 Loan which became a Liquidated Mortgage Loan during the Prior Period, of the
lesser of (i) the Group 2 Lockout Adjusted Percentage of the Principal Balance of such Mortgage Loan (exclusive of the
Class 2-P Fraction thereof, with respect to any Class 2-P Mortgage Loan) and (ii) the Group 2 Lockout
Adjusted Percentage of the Liquidation Principal with respect to such Mortgage Loan.


Group 2 Lockout Percentage: For any
Distribution Date, the lesser of (i) 100% and (ii) the aggregate Class Principal Balance of the Class 2-A-1 and Class 2-A-6
Certificates, divided by the aggregate Principal Balance of the Group 2 Loans (exclusive of the Class 2-P Fraction thereof,
with respect to any Class 2-P Mortgage Loan), in each case immediately before such Distribution
Date.


Group 2 Lockout Prepayment Percentage: For
any Distribution Date, the product of (i) the Group 2 Lockout Percentage and (ii) the Step Down Percentage.


Group 2 Lockout Priority Amount: For any
Distribution Date, the sum of (i) the Group 2 Lockout Adjusted Percentage of the Principal Payment Amount for Loan Group
2 (exclusive of the portion thereof attributable to principal distributions to the Class C-P-L Regular Interest pursuant to
clauses (I)(b)(i) and (II)(b)(i) of the definition of “REMIC I Distribution Amount”), (ii) the
Group 2 Lockout Prepayment Percentage of the Principal Prepayment Amount for Loan Group 2 (exclusive of the portion thereof
attributable to principal distributions to the Class C-P-L Regular Interest pursuant to clauses (I)(b)(i) and (II)(b)(i) of the
definition of “REMIC I Distribution Amount”) and (iii) the Group 2 Lockout Liquidation
Amount.


Group 2 Premium Rate Mortgage Loans:  The Group 2 Loans
having Pass-Through Rates greater than or equal to 5.500% per annum.


Group 2 Senior Liquidation Amount: For any Distribution Date,
the sum of (A) the aggregate, for each Group 2 Loan which became a Liquidated Mortgage Loan during the Prior Period, of the lesser
of: (i) the Group 2 Senior Percentage of the Principal Balance of such Mortgage Loan (exclusive of the Class 2-P Fraction thereof,
with respect to any Class 2-P Mortgage Loan) and (ii) the Group 2 Senior Prepayment Percentage of the Liquidation Principal with
respect to such Mortgage Loan and (B) the Group 2 Senior Prepayment Percentage of any Subsequent Recoveries for Loan Group 2 for
such Distribution Date.


Group 2 Senior Percentage: For any Distribution Date, the
lesser of (i) 100% and (ii) the aggregate Class Principal Balance of the Group 2-A Certificates divided by the aggregate Principal
Balance of the Group 2 Loans (exclusive of the Class 2-P Fraction thereof with respect to any Class 2-P Mortgage Loan), in each
case immediately before such Distribution Date.


Group 2 Senior Prepayment Percentage: See the definition of
“Group 1 Senior Prepayment Percentage or Group 2 Senior Prepayment Percentage.”


Group 2 Senior Principal Distribution Amount: For any
Distribution Date, an amount equal to the sum of (a) the Group 2 Senior Percentage of the Principal Payment Amount for Loan Group 2
(exclusive of the portion thereof attributable to principal distributions to the Class C-P-L Regular Interest pursuant to clauses
(I)(b)(i) and (II)(b)(i) of the definition of “REMIC I Distribution Amount”), (b) the Group 2 Senior Prepayment
Percentage of the Principal Prepayment Amount for Loan Group 2 (exclusive of the portion thereof attributable to principal
distributions to the Class C-P-L Regular Interest pursuant to clauses (I)(b)(i) and (II)(b)(i) of the definition of “REMIC I
Distribution Amount”) and (c) the Group 2 Senior Liquidation Amount.


Group 2 Subordinate Percentage: For any Distribution Date, the
excess of 100% over the Group 2 Senior Percentage for such date.


Group 2 Subordinate Prepayment Percentage: For any Distribution
Date, the excess of 100% over the Group 2 Senior Prepayment Percentage for such Distribution Date; provided, however, that
if the aggregate Class Principal Balance of the Group 2-A Certificates has been reduced to zero, then the Group 2 Subordinate
Prepayment Percentage shall equal 100%.


Group 2-A Certificates: The Class 2-A-1, Class 2-A-2, Class
2-A-3, Class 2-A-4, Class 2-A-5 and Class 2-A-6 Certificates.


Group 2-A-L Regular Interests: The Class 2-A-1-L, Class
2-A-2-L, Class 2-A-3-L, Class 2-A-5-L and Class 2-A-6-L Regular Interests.


Group 2-L Regular Interests: The Group 2-A-L Regular
Interests.


Indirect DTC Participants: Entities such as banks, brokers,
dealers or trust companies, that clear through or maintain a custodial relationship with a DTC Participant, either directly or
indirectly.


Insurance Proceeds: Amounts paid or payable by the insurer
under any Primary Insurance Policy or any other insurance policy (including any replacement policy permitted under this Agreement)
covering any Mortgage Loan or Mortgaged Property, including, without limitation, any hazard insurance policy required pursuant to
Section 3.07, any title insurance policy required pursuant to Section 2.08 and any FHA insurance policy or VA guaranty.


Interest Distribution Amount: For any Distribution Date, for
any Class of REMIC I Regular Interests and for the Class R-1 Residual Interest, the amount of interest accrued during the Prior
Period (or, in the case of the Class 1-CB-3-L and Class 2-A-3-L Regular Interests, during the period beginning on the 25th day of
the preceding calendar month and ending on the 24th day of the month of the Distribution Date), at the related Certificate Interest
Rate for such Class for such Distribution Date, on the respective Class Principal Balance or Class Notional Amount 
immediately before such Distribution Date, reduced by Uncompensated Interest Shortfall and the interest portion of Realized Losses
allocated to such Class on such Distribution Date pursuant to the definitions of “Uncompensated Interest Shortfall” and
“Realized Loss,” respectively.  The computation of interest accrued shall be made on the basis of a 360-day year
of twelve 30-day months.  The Interest Distribution Amounts for the Class P-L Regular Interests shall equal zero.


Interest Transfer Amount: On any Distribution Date for an
Undercollateralized Group, an amount equal to one month’s interest on the applicable Principal Transfer Amount at 5.500% per
annum, plus any interest accrued on the Senior Regular Interests related to such Undercollateralized Group remaining unpaid from
prior Distribution Dates.


Investment Account: The commingled account (which shall be
commingled only with investment accounts related to series of pass-through certificates with a class of certificates which has a
rating equal to the highest of the Ratings of the Certificates) maintained by the Servicer in the trust department of the
Investment Depository pursuant to Section 3.03 and which bears a designation acceptable to the Rating Agencies.


Investment Depository: JPMorgan Chase Bank, or another bank or
trust company designated from time to time by the Servicer. The Investment Depository shall at all times be an Eligible
Institution.


Junior Subordinate Certificates: The Class B-4, Class B-5 and
Class B-6 Certificates.


Last Scheduled Distribution Date: With respect to any Class of
Certificates, the Final Maturity Date for such Class.


Lender: An institution from which the Company purchased any
Mortgage Loans pursuant to a Selling and Servicing Contract.


LIBOR: The London Interbank Offered
Rate for one-month United States dollar deposits calculated in the manner described in Section 3.19.


LIBOR Determination Date: With respect to
interest paid on any Distribution Date, the second day on which banks in London and New York City are open for conducting
transactions in foreign currency and exchange prior to the 25th day of the month preceding the Distribution Date.


Liquidated Mortgage Loan: A Mortgage Loan (other than a
Mortgage Loan with respect to which a Payoff has been made) for which the Servicer has determined in accordance with its customary
servicing practices that it has received all amounts which it expects to recover from or on account of such Mortgage Loan, whether
from Insurance Proceeds, Liquidation Proceeds or otherwise. For purposes of this definition, acquisition of a Mortgaged Property by
the Trust shall not constitute final liquidation of the related Mortgage Loan.


Liquidation Principal: The principal portion of Liquidation
Proceeds received (exclusive of the portion thereof attributable to distributions to the Class P-L Regular Interests pursuant to
clauses (I)(a)(i), (I)(b)(i), (II)(a)(i) and (II)(b)(i) of the definition of “REMIC I Distribution Amount”) with
respect to each Mortgage Loan which became a Liquidated Mortgage Loan (but not in excess of the principal balance thereof) during
the Prior Period.


Liquidation Proceeds: Amounts after deduction of amounts
reimbursable under Section 3.05(a)(i) and (ii) received and retained in connection with the liquidation of defaulted Mortgage
Loans, whether through foreclosure or otherwise, other than any Subsequent Recoveries.


Loan Group: Loan Group 1 or Loan Group 2, as applicable.


Loan Group 1: The group of Mortgage Loans comprised of the
Group 1 Loans.


Loan Group 2: The group of Mortgage
Loans comprised of the Group 2 Loans.


Loan-to-Value Ratio: The original principal amount of a
Mortgage Loan divided by the Original Value; provided, however, that references to “current Loan-to-Value Ratio”
or “Loan-to-Value Ratio as of the Cut-Off Date” in Section 2.08 shall be deemed to mean the then current Principal
Balance of a Mortgage Loan divided by the Original Value.


Lowest Class B Owner: An owner unaffiliated with the Company or
the Servicer of (i) a 100% interest in the Class of Class B Certificates with the lowest priority or (ii) a 100% interest in a
class of securities representing such interest in such Class specified in clause (i) above.


MERS: Mortgage Electronic Registration Systems, Inc., a
Delaware corporation, or any successor thereto.


MERS Loan: Any Mortgage Loan registered on the MERS® System
for which MERS appears as the mortgagee of record on the Mortgage or on an assignment thereof.


MERS® System: The system of electronically recording
transfers of Mortgages maintained by MERS.


MIN: The Mortgage Identification Number for a MERS Loan.


MOM Loan: A Mortgage Loan that was registered on the MERS®
System at the time of origination thereof and for which MERS appears as the mortgagee of record on the Mortgage.


Monthly P&I Advance: An advance of funds by the Servicer
pursuant to Section 4.02 to cover delinquent principal and interest installments.


Monthly Payment: The scheduled payment of principal and
interest on a Mortgage Loan (including any amounts due from a Buydown Fund, if any) which is due on the related Due Date for such
Mortgage Loan.


Moody’s:  Moody’s Investors Service, Inc.,
provided that at any time it be a Rating Agency.


Mortgage: The mortgage, deed of trust or other instrument
securing a Mortgage Note.


Mortgage File: The following documents or instruments with
respect to each Mortgage Loan transferred and assigned by the Company pursuant to Section 2.04, (X) with respect to each Mortgage
Loan that is not a Cooperative Loan:


(i)                  The original
Mortgage Note endorsed (A) in blank, without recourse, or (B) to “LaSalle Bank National Association, as Custodian/Trustee,
without recourse” or to “Washington Mutual Mortgage Pass-Through Certificates WMALT Series 2005-3 Trust, without
recourse” and all intervening endorsements evidencing a complete chain of endorsements from the originator to the Trustee or
the Trust, as applicable, or, in the event of any Destroyed Mortgage Note, a copy or a duplicate original of the Mortgage Note (or
portion thereof, as applicable), together with an original lost note affidavit from the originator of the Mortgage Loan or the
Company (or any affiliate of the Company from which the Company acquired the Mortgage Loan), as applicable, stating that the
original Mortgage Note (or portion thereof, as applicable) was lost, misplaced or destroyed, together with a copy of the Mortgage
Note (or portion thereof, as applicable); provided, however, that in the event the Company acquired the Mortgage Loan from
an affiliate of the Company, then the Mortgage Note (or portion thereof, as applicable) need not be endorsed in blank or to LaSalle
Bank National Association or the Trust as provided above (but, if not so endorsed, shall be made payable to, or endorsed by the
mortgagee named therein to, such affiliate of the Company);


(ii)                The Buydown Agreement, if
applicable;


(iii)               A Mortgage that is either


(1)        (x) the original recorded Mortgage with
evidence of recording thereon for the jurisdiction in which the Mortgaged Property is located (which original recorded Mortgage, in
the case of a MOM Loan, shall set forth the MIN and shall indicate that the Mortgage Loan is a MOM Loan), (y) unless the Mortgage
Loan is a MERS Loan, an original Mortgage assignment thereof duly executed and acknowledged in recordable form (A) in blank or (B)
to “LaSalle Bank National Association, as Custodian/Trustee,” or to “Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust,” and (z) unless the Mortgage Loan is a MOM Loan, recorded originals of all
intervening assignments evidencing a complete chain of assignment, from the originator to the name holder or the payee endorsing
the related Mortgage Note (or, in the case of a MERS Loan other than a MOM Loan, from the originator to MERS); or


(2)        (x) a copy (which may be in electronic form)
of the Mortgage (which Mortgage, in the case of a MOM Loan, shall set forth the MIN and shall indicate that the Mortgage Loan is a
MOM Loan) which represents a true and correct reproduction of the original Mortgage and which has either been certified (i) on the
face thereof by the public recording office in the appropriate jurisdiction in which the Mortgaged Property is located, or (ii) by
the originator, the related Lender or the escrow or title company which provided closing services in connection with such Mortgage
Loan as a true and correct copy the original of which has been sent for recordation, (y) unless the Mortgage Loan is a MERS Loan,
an original Mortgage assignment thereof duly executed and acknowledged in recordable form (A) in blank or (B) to “LaSalle
Bank National Association, as Custodian/Trustee,” or to “Washington Mutual Mortgage Pass-Through Certificates WMALT
Series 2005-3 Trust,” and (z) unless the Mortgage Loan is a MOM Loan, true and correct copies, certified by the applicable
county recorder or by the originator or Lender as described above, of all intervening assignments evidencing a complete chain of
assignment from the originator to the name holder or the payee endorsing the related Mortgage Note (or, in the case of a MERS Loan
other than a MOM Loan, from the originator to MERS);


provided, however, that in the event the Company acquired the Mortgage Loan
from an affiliate of the Company, then the Mortgage File need not include a Mortgage assignment executed in blank or to LaSalle
Bank National Association or the Trust as provided in clause (X)(iii)(1)(y) or (X)(iii)(2)(y) above, as applicable (but the
Mortgage File shall, unless the Mortgage Loan was originated by such affiliate of the Company, include an intervening Mortgage
assignment to such affiliate as provided in clause (X)(iii)(1)(z) or (X)(iii)(2)(z) above, as applicable); and


(iv)              For any Mortgage Loan that has been
modified or amended, the original instrument or instruments effecting such modification or amendment;


and (Y) with respect to each Cooperative Loan:


(i)                  the original
Mortgage Note endorsed (A) in blank, without recourse, or (B) to “LaSalle Bank National Association, as Custodian/Trustee,
without recourse” or to “Washington Mutual Mortgage Pass-Through Certificates WMALT Series 2005-3 Trust, without
recourse” and all intervening endorsements evidencing a complete chain of endorsements, from the originator to the Trustee or
the Trust, as applicable, or, in the event of any Destroyed Mortgage Note, a copy or a duplicate original of the Mortgage Note (or
portion thereof, as applicable), together with an original lost note affidavit from the originator of the Cooperative Loan or the
Company (or any affiliate of the Company from which the Company acquired the Mortgage Loan), as applicable, stating that the
original Mortgage Note (or portion thereof, as applicable) was lost, misplaced or destroyed, together with a copy of the Mortgage
Note (or portion thereof, as applicable); provided, however, that in the event the Company acquired the Cooperative Loan
from an affiliate of the Company, then the Mortgage Note need not be endorsed in blank or to LaSalle Bank National Association or
the Trust as provided above (but, if not so endorsed, shall be made payable to, or endorsed by the originator or successor lender
named therein to, such affiliate of the Company);


(ii)                A counterpart of the
Cooperative Lease and the Assignment of Proprietary Lease to the originator of the Cooperative Loan;


(iii)               The related Cooperative Stock
Certificate, representing the related Cooperative Stock pledged with respect to such Cooperative Loan, together with an undated
stock power (or other similar instrument) executed in blank;


(iv)              The Recognition Agreement;


(v)                The Security Agreement;


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


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


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


(ix)              For any Cooperative Loan that has been
modified or amended, the original instrument or instruments effecting such modification or amendment;


provided, however, that in the event the Company acquired the Cooperative
Loan from an affiliate of the Company, then the Mortgage File need not include (1) a UCC assignment or amendment of the security
interest referenced in clause (Y)(vi) above to the Trust as provided in clause (Y)(vii) above (but the Mortgage File shall, unless
the Cooperative Loan was originated by such affiliate of the Company, include a UCC assignment or amendment of such security
interest to such affiliate) or (2) an assignment of the interest of the originator in the Security Agreement, the Assignment of
Proprietary Lease and the Recognition Agreement to the Trust as provided in clause (Y)(viii) above (but the Mortgage File shall,
unless the Cooperative Loan was originated by such affiliate of the Company, include an assignment of such interest to such
affiliate).


Mortgage Interest Rate: For any Mortgage Loan, the per annum
rate at which interest accrues on such Mortgage Loan pursuant to the terms of the related Mortgage Note.


Mortgage Loan Schedule: The schedule, as amended from time to
time, of Mortgage Loans attached hereto as Exhibit D, which shall set forth as to each Mortgage Loan the following, among other
things:


(i)                  its loan
number,


(ii)                the address of the Mortgaged
Property,


(iii)               the name of the Mortgagor,


(iv)              the Original Value of the property
subject to the Mortgage,


(v)                the Principal Balance as of
the Cut-Off Date,


(vi)              the Mortgage Interest Rate borne by the
Mortgage Note,


(vii)             whether a Primary Insurance Policy is in effect
as of the Cut-Off Date, and, if so, whether such Primary Insurance Policy is a Special Primary Insurance Policy,


(viii)           the maturity of the Mortgage Note,


(ix)              the Servicing Fee Rate,


(x)                its Loan Group, and


(xi)              whether it imposes penalties for early
prepayments.


Mortgage Loans: The mortgage loans and cooperative loans (if
any) listed on the Mortgage Loan Schedule and transferred and assigned to the Trust pursuant hereto. With respect to each Mortgage
Loan that is a Cooperative Loan, “Mortgage Loan” shall include, but not be limited to, the Mortgage Note, Security
Agreement, Assignment of Proprietary Lease, Recognition Agreement, Cooperative Stock Certificate and Cooperative Lease and, with
respect to each Mortgage Loan other than a Cooperative Loan, “Mortgage Loan” shall include, but not be limited to the
Mortgage Note and the related Mortgage.


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


Mortgage Pool: All of the Mortgage Loans.


Mortgage Pool Assets: (i) The Mortgage Loans (including all
Substitute Mortgage Loans) identified on the Mortgage Loan Schedule, and all rights pertaining thereto, including the related
Mortgage Notes, Mortgages, Cooperative Stock Certificates, Cooperative Leases, Security Agreements, Assignments of Proprietary
Lease, and Recognition Agreements, and all payments and distributions with respect to the Mortgage Loans payable on and after the
Cut-Off Date; (ii) the Certificate Account, the Investment Account, and all money, instruments, investment property, and other
property credited thereto, carried therein, or deposited therein (except amounts constituting the Servicing Fee); (iii) the
Custodial Accounts for P&I, the Custodial Accounts for Reserves, any Buydown Fund Account (to the extent of the amounts on
deposit or other property therein attributable to the Mortgage Loans), and all money, instruments, investment property, and other
property credited thereto, carried therein, or deposited therein (except amounts constituting the Servicing Fee); (iv) all property
that secured a Mortgage Loan and that has been acquired by foreclosure or deed in lieu of foreclosure or, in the case of a
Cooperative Loan, a similar form of conversion, after the Cut-Off Date; and (v) each FHA insurance policy, Primary Insurance
Policy, VA guaranty, and other insurance policy related to any Mortgage Loan, and all amounts paid or payable thereunder and all
proceeds thereof.


Mortgaged Property: With respect to any Mortgage Loan, other
than a Cooperative Loan, the real property, together with improvements thereto, and, with respect to any Cooperative Loan, the
related Cooperative Stock and Cooperative Lease, securing the indebtedness of the Mortgagor under the related Mortgage Loan. 
“Mortgaged Property” shall also refer to property which once secured the indebtedness of a Mortgagor under the related
Mortgage Loan but which was acquired by the Trust upon foreclosure or other liquidation of such Mortgage Loan.


Mortgagor: The obligor on a Mortgage Note.


Nonrecoverable Advance: With respect to any Mortgage Loan, any
advance which the Servicer shall determine to be a Nonrecoverable Advance pursuant to Section 4.03 and which was, or is proposed to
be, made by the Servicer.


Non-U.S. Person: A Person that is not a U.S. Person.


Notice Addresses: (a) In the case of the Company, 75 North
Fairway Drive, Vernon Hills, Illinois 60061, Attention: Servicing Department, with a copy to: Washington Mutual Legal Department,
1201 Third Avenue, WMT 1706, Seattle, WA 98101, Attention: WMMSC, or such other address as may hereafter be furnished to the
Trustee in writing by the Company, (b) in the case of the Servicer, 19850 Plummer St. (Mail Stop N070205) Chatsworth, California
91311, Fax No: (818) 775-2815, Attention: Vice President Investor Reporting, with a copy to: Washington Mutual Legal Department,
1201 Third Avenue, WMT 1706, Seattle, WA 98101, Fax No: (206) 377-6244, Attention: WaMu, or such other address and fax number as
may hereafter be furnished in writing by the Servicer, (c) in the case of the Trustee, at its Corporate Trust Office, or such other
address as may hereafter be furnished to the Servicer in writing by the Trustee, (d) in the case of the Delaware Trustee, 1314 King
Street, Wilmington, DE  19801, or such other address as may hereafter be furnished to the Servicer in writing by the Delaware
Trustee, (e) in the case of the Trust, c/o LaSalle Bank National Association, at the Corporate Trust Office, or such other address
as may hereafter be furnished to the Servicer in writing by the Trustee, (f) in the case of the Certificate Registrar, at its
Corporate Trust Office, or such other address as may hereafter be furnished to the Trustee in writing by the Certificate Registrar,
(g) in the case of S&P, 55 Water Street, 41st Floor, New York, New York 10041-0003, Attention:  Frank Raiter, or such
other address as may hereafter be furnished to the Trustee and Servicer in writing by S&P and (h) in the case of Moody’s,
99 Church Street, New York, New York 10007, Attention:  Monitoring, or such other address as may hereafter be furnished to the
Trustee and Master Servicer in writing by Moody’s.


OTS: The Office of Thrift Supervision, or any successor
thereto.


Officer’s Certificate: A certificate signed by the
Chairman of the Board, the President, a Vice President, or the Treasurer of the Servicer and delivered to the Trustee or the
Delaware Trustee, as applicable.


Opinion of Counsel: A written opinion of counsel, who shall be
reasonably acceptable to the Trustee or the Delaware Trustee, as applicable, and who may be counsel (including in-house counsel)
for the Company or the Servicer.


Original Trust Agreement: The Trust Agreement, dated as of
April 1, 2005, between the Company and the Delaware Trustee, providing for the creation of the Trust.


Original Value: With respect to any Mortgage Loan other than a
Mortgage Loan originated for the purpose of refinancing an existing mortgage debt, the lesser of (a) the Appraised Value (if any)
of the Mortgaged Property at the time the Mortgage Loan was originated or (b) the purchase price paid for the Mortgaged Property by
the Mortgagor. With respect to a Mortgage Loan originated for the purpose of refinancing existing mortgage debt, the Original Value
shall be equal to the Appraised Value of the Mortgaged Property.


Overcollateralized Group: Either of Loan Group 1 or Loan
Group 2, if on any Distribution Date such Loan Group is not an Undercollateralized Group and the other Loan Group is an
Undercollateralized Group.


Ownership Interest:  With respect to any Residual
Certificate, any ownership or security interest in such Residual Certificate, including any interest in a Residual Certificate as
the Holder thereof and any other interest therein whether direct or indirect, legal or beneficial, as owner or as pledgee.


Pass-Through Entity:  Any regulated investment company,
real estate investment trust, common trust fund, partnership, trust or estate, and any organization to which Section 1381 of the
Code applies.


Pass-Through Rate: For each Mortgage Loan, the Mortgage
Interest Rate for such Mortgage Loan less (i) the Servicing Fee Rate for such Mortgage Loan and (ii) if such Mortgage Loan was
covered by a Special Primary Insurance Policy on the Closing Date (even if no longer so covered), the per annum rate at which the
applicable Special Primary Insurance Premium for such Mortgage Loan is calculated. For each Mortgage Loan, any calculation of
monthly interest at such rate shall be based upon annual interest at such rate (computed on the basis of a 360-day year of twelve
30-day months) on the unpaid Principal Balance of such Mortgage Loan divided by twelve, and any calculation of interest at such
rate by reason of a Payoff shall be based upon annual interest at such rate on the outstanding Principal Balance of such Mortgage
Loan multiplied by a fraction, the numerator of which is the number of days elapsed from the Due Date of the last scheduled payment
of principal and interest to, but not including, the date of such Payoff, and the denominator of which is (a) for Payoffs received
on a Due Date, 360, and (b) for all other Payoffs, 365.


Paying Agent: Any paying agent appointed by the Trustee
pursuant to Section 8.12.


Payoff: Any Mortgagor payment of principal on a Mortgage Loan
equal to the entire outstanding Principal Balance of such Mortgage Loan, if received in advance of the last scheduled Due Date for
such Mortgage Loan and accompanied by an amount of interest equal to accrued unpaid interest on the Mortgage Loan to the date of
such payment-in-full.  (Prepayment penalties are not payments of principal and hence Payoffs do not include prepayment
penalties.)


Payoff Earnings: For any Distribution Date with respect to each
Mortgage Loan on which a Payoff was received by the Servicer during the Payoff Period, the aggregate of the interest earned by the
Servicer from investment of each such Payoff from the date of receipt of such Payoff until the Business Day immediately preceding
the related Distribution Date (net of investment losses).


Payoff Interest: For any Distribution Date with respect to a
Mortgage Loan for which a Payoff was received on or after the first calendar day of the month of such Distribution Date and before
the 15th calendar day of such month, an amount of interest thereon at the applicable Pass-Through Rate from the first day of the
month of distribution through the day of receipt thereof; to the extent (together with Payoff Earnings and the aggregate Servicing
Fee) not required to be distributed as Compensating Interest on such Distribution Date, Payoff Interest shall be payable to the
Servicer as additional servicing compensation.


Payoff Period: For the first Distribution Date, the period from
the Cut-Off Date through May 14, 2005, inclusive; and for any Distribution Date thereafter, the period from the 15th day of
the Prior Period through the 14th day of the month of such Distribution Date, inclusive.


Percentage Interest:  (a)  With respect to the right
of each Certificate of a particular Class in the distributions allocated to such Class, “Percentage Interest” shall
mean the percentage equal to:


(i)                  with respect to
any Certificate (other than the Residual, Class C-X, Class 1-CB-4 and Class 2-A-4 Certificates), its Certificate Principal Balance
divided by the applicable Class Principal Balance;


(ii)                with respect to any Class
C-X, Class 1-CB-4 or Class 2-A-4 Certificate, the portion of the respective Class Notional Amount evidenced by such Certificate
divided by the respective Class Notional Amount; and


(iii)               with respect to any Residual
Certificate, the percentage set forth on the face of such Certificate.


(b)        With respect to the rights of each
Certificate in connection with Sections 5.09, 7.01, 8.01(c), 8.02, 8.07, 10.01 and 10.03, “Percentage Interest” shall
mean the percentage equal to:


(i)                  with respect to
any Certificate (other than the Residual, Class C-X, Class 1-CB-4 and Class 2-A-4 Certificates), the product of (x) ninety-seven
percent (97%) and (y) its Certificate Principal Balance divided by the Aggregate Certificate Principal Balance of the Certificates;
provided, however, that the percentage in clause (x) above shall be increased by one percent (1%) upon the retirement of
each Class of Certificates referenced in the parenthetical above (other than the Residual Certificates).


(ii)                with respect to each Class
C-X, Class 1-CB-4 or Class 2-A-4 Certificate, one percent (1%) of such Certificate’s Percentage Interest as calculated by
paragraph (a)(ii) of this definition; and


(iii)               with respect to any Residual
Certificate, zero.


Permitted Transferee: With respect to the holding or ownership
of any Residual Certificate, any Person other than (i) the United States, a State or any 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 Code
Section 521) which is exempt from the taxes imposed by Chapter 1 of the Code (unless such organization is subject to the tax
imposed by Section 511 of the Code on unrelated business taxable income), (iv) rural electric and telephone cooperatives described
in Code Section 1381(a)(2)(C), (v) any “electing large partnership” as defined in Section 775(a) of the Code, (vi) any
Person from whom the Trustee has not received an affidavit to the effect that it is not a “disqualified organization”
within the meaning of Section 860E(e)(5) of the Code, and (vii) any other Person so designated by the Company based upon an Opinion
of Counsel that the transfer of an Ownership Interest in a Residual Certificate to such Person may cause REMIC I or REMIC II to
fail to qualify as a REMIC at any time that the Certificates are outstanding. The terms “United States,”
“State” and “International Organization” shall have the meanings set forth in Code Section 7701 or
successor provisions. A corporation shall not be treated as an instrumentality of the United States or of any State or political
subdivision thereof if all of its activities are subject to tax, and, with the exception of the Freddie Mac, a majority of its
board of directors is not selected by such governmental unit.


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


Prepaid Monthly Payment: Any Monthly Payment received prior to
its scheduled Due Date, which is intended to be applied to a Mortgage Loan on its scheduled Due Date and held in the related
Custodial Account for P&I until the Withdrawal Date following its scheduled Due Date.


Primary Insurance Policy: A policy of mortgage guaranty
insurance, if any, on an individual Mortgage Loan or on pools of mortgage loans that include an individual Mortgage Loan, providing
coverage as required by Section 2.08(xi) (including any Special Primary Insurance Policy).


Principal Balance: Except as used in Sections 2.07, 3.09 and
9.01 and for purposes of the definition of Purchase Price, at the time of any determination, the principal balance of a Mortgage
Loan remaining to be paid at the close of business on the Cut‐Off Date, after application of all scheduled principal payments
due on or before the Cut‐Off Date, whether or not received, reduced by all amounts distributed or (except when such
determination occurs earlier in the month than the Distribution Date) to be distributed to Certificateholders through the
Distribution Date in the month of determination that are reported as allocable to principal of such Mortgage Loan.


For purposes of the definition of Purchase Price and as used in Sections 2.07, 3.09 and
9.01, at the time of any determination, the principal balance of a Mortgage Loan remaining to be paid at the close of business on
the Cut-Off Date, after deduction of all scheduled principal payments due on or before the Cut-Off Date, whether or not received,
reduced by all amounts distributed or to be distributed to Certificateholders through the Distribution Date in the month of
determination that are reported as allocable to principal of such Mortgage Loan.


In the case of a Substitute Mortgage Loan, “Principal Balance” shall mean, at
the time of any determination, the principal balance of such Substitute Mortgage Loan transferred to the Trust, on the date of
substitution, reduced by all amounts distributed or to be distributed to Certificateholders through the Distribution Date in the
month of determination that are reported as allocable to principal of such Substitute Mortgage Loan.


The Principal Balance of a Mortgage Loan (including a Substitute Mortgage Loan) shall not
be adjusted solely by reason of any bankruptcy or similar proceeding or any moratorium or similar waiver or grace period. Whenever
a Realized Loss has been incurred with respect to a Mortgage Loan during a calendar month, the Principal Balance of such Mortgage
Loan shall be reduced by the amount of such Realized Loss as of the Due Date next following the end of such calendar
month.


Principal Payment: Any payment of principal on a Mortgage Loan
other than a Principal Prepayment.


Principal Payment Amount: For any Distribution Date and for any
Loan Group, the sum with respect to the Mortgage Loans in such Loan Group of (i) the scheduled principal payments on the Mortgage
Loans due on the related Due Date, (ii) the principal portion of proceeds received with respect to any Mortgage Loan which was
purchased or repurchased pursuant to a Purchase Obligation or as permitted by this Agreement during the Prior Period and (iii) any
other unscheduled payments of principal which were received with respect to any Mortgage Loan during the Prior Period, other than
Payoffs, Curtailments, Liquidation Principal and Subsequent Recoveries.


Principal Prepayment: Any payment of principal on a Mortgage
Loan which constitutes a Payoff or a Curtailment.


Principal Prepayment Amount: For any Distribution Date and for
any Loan Group, the sum with respect to the Mortgage Loans in such Loan Group of (i) Curtailments received during the Prior Period
from such Mortgage Loans and (ii) Payoffs received during the Payoff Period from such Mortgage Loans.


Principal Transfer Amount: For any Distribution Date for an
Undercollateralized Group, the excess, if any, of the aggregate Class Principal Balance of the Class A Certificates related to such
Undercollateralized Group over the aggregate Principal Balance of the Mortgage Loans in such Loan Group (less the applicable Class
P Fraction thereof with respect to any Class P Mortgage Loans in such Loan Group), in each case immediately prior to such
Distribution Date.


Prior Period: With respect to any Distribution Date, the
calendar month immediately preceding such Distribution Date.


Prospectus:  The Prospectus, dated April 20, 2005, and the
Prospectus Supplement, dated April 21, 2005, of the Company.


Purchase Obligation: An obligation of the Company to repurchase
Mortgage Loans under the circumstances and in the manner provided in Section 2.07 or Section 2.08.


Purchase Price: With respect to any Mortgage Loan to be
purchased pursuant to a Purchase Obligation, an amount equal to the sum of (i) the Principal Balance thereof, (ii) unpaid accrued
interest thereon, if any, during the calendar month in which the date of purchase occurs to the last day of such month at a rate
equal to the applicable Pass-Through Rate and (iii) with respect to any Mortgage Loan to be purchased pursuant to Section 2.08, any
costs and damages incurred by the Trust in connection with any violation by such Mortgage Loan of any predatory and abusive lending
laws, to the extent such costs and damages result from a breach of the representation and warranty made by the Company pursuant to
clause (viii) of Section 2.08; provided, however, that to the extent that such costs and damages constitute a set-off
against the principal balance of the Mortgage Loan, such costs and damages will not be paid pursuant to this clause (iii), and the
amount paid pursuant to clause (i) above will be calculated without regard to such set-off; provided, further, that
no Mortgage Loan shall be purchased or required to be purchased pursuant to Section 2.08, or more than two years after the Closing
Date under Section 2.07, unless (a) the Mortgage Loan to be purchased is in default, or default is in the judgment of the Company
reasonably imminent, or (b) the Company, at its expense, delivers to the Trustee an Opinion of Counsel addressed to the Trust and
the Trustee to the effect that the purchase of such Mortgage Loan will not give rise to a tax on a prohibited transaction, as
defined in Section 860F(a) of the Code.


Rating Agency: Initially, each of S&P and Moody’s and
thereafter, each nationally recognized statistical rating organization that has rated the Certificates at the request of the
Company, or their respective successors in interest.


Ratings: As of any date of determination, the ratings, if any,
of the Certificates as assigned by the applicable Rating Agencies.


Realized Loss: For any Distribution Date, with respect to any
Mortgage Loan which became a Liquidated Mortgage Loan during the related Prior Period, the sum of (i) the principal balance of such
Mortgage Loan remaining outstanding and the principal portion of Nonrecoverable Advances actually reimbursed with respect to such
Mortgage Loan (the principal portion of such Realized Loss), and (ii) the accrued interest on such Mortgage Loan remaining unpaid
and the interest portion of Nonrecoverable Advances actually reimbursed with respect to such Mortgage Loan (the interest portion of
such Realized Loss); provided, however, that for purposes of allocating Realized Losses to the REMIC I and REMIC II Regular Interests pursuant to this definition of “Realized Loss,” the aggregate principal
portion of Realized Losses for any Distribution Date for any Loan Group shall be reduced by the Cumulative Carry-Forward Subsequent
Recoveries Amount for such Distribution Date for such Loan Group. For any Distribution Date, with respect to any Mortgage Loan
which is not a Liquidated Mortgage Loan, the amount of the Bankruptcy Loss incurred with respect to such Mortgage Loan as of the
related Due Date.


Realized Losses on Mortgage Loans in a Loan Group shall be allocated among the REMIC I
Regular Interests (i) for Realized Losses allocable to principal (a) first, to the Class B-6-L Regular Interest, until the Class
B-6-L Principal Balance has been reduced to zero, (b) second, to the Class B-5-L Regular Interest, until the Class B-5-L Principal
Balance has been reduced to zero, (c) third, to the Class B-4-L Regular Interest, until the Class B-4-L Principal Balance has been
reduced to zero, (d) fourth, to the Class B-3-L Regular Interest, until the Class B-3-L Principal Balance has been reduced to zero,
(e) fifth, to the Class B-2-L Regular Interest, until the Class B-2-L Principal Balance has been reduced to zero, (f) sixth, to the
Class B-1-L Regular Interest, until the Class B-1-L Principal Balance has been reduced to zero, and (g) seventh, to the Class A-L
Regular Interests related to such Loan Group, pro rata according to the Class Principal Balances thereof, in reduction thereof;
provided, however, that if the loss is recognized with respect to a Class P Mortgage Loan, the applicable Class P Fraction
of such loss shall first be allocated to the Class C-P-L Regular Interest and the remainder of such loss shall be allocated as set
forth above in this clause (i); and (ii) for Realized Losses allocable to interest (a) first, to the Class B-6-L Regular Interest,
in reduction of accrued but unpaid interest thereon and then in reduction of the Class B-6-L Principal Balance, (b) second, to the
Class B-5-L Regular Interest, in reduction of accrued but unpaid interest thereon and then in reduction of the Class B-5-L
Principal Balance, (c) third, to the Class B-4-L Regular Interest, in reduction of accrued but unpaid interest thereon and then in
reduction of the Class B-4-L Principal Balance, (d) fourth, to the Class B-3-L Regular Interest, in reduction of accrued but unpaid
interest thereon and then in reduction of the Class B-3-L Principal Balance, (e) fifth, to the Class B-2-L Regular Interest, in
reduction of accrued but unpaid interest thereon and then in reduction of the Class B-2-L Principal Balance, (f) sixth, to the
Class B-1-L Regular Interest, in reduction of accrued but unpaid interest thereon and then in reduction of the Class B-1-L
Principal Balance, and (g) seventh, to the Class A-L Regular Interests related to such Loan Group, and the portion of the Class
C-X-L Regular Interest that derives its interest from such Loan Group, pro rata according to accrued but unpaid interest on such
Classes (or portions thereof), in reduction thereof, and then to those related Class A-L Regular Interests, pro rata according to
the Class Principal Balances thereof, in reduction thereof; provided, however, that (1) until the Class 1-CB-2-L Principal
Balance has been reduced to zero, all principal losses that would otherwise be allocated to the Class 1-CB-1-L Regular Interest
pursuant to clause (i) of this paragraph shall instead be allocated to the Class 1-CB-2-L Regular Interest, in reduction of the
Class 1-CB-2-L Principal Balance, and all interest losses that would otherwise be allocated to the Class 1-CB-1-L Regular Interest
pursuant to clause (ii) of this paragraph shall instead be allocated to the Class 1-CB-2-L Regular Interest, in reduction of
accrued but unpaid interest thereon, and then in reduction of the Class 1-CB-2-L Principal Balance, (2) until the Class 1-CB-6-L
Principal Balance has been reduced to zero, all principal losses that would otherwise be allocated to the Class 1-CB-3-L Regular
Interest pursuant to clause (i) of this paragraph shall instead be allocated to the Class 1-CB-6-L Regular Interest, in reduction
of the Class 1-CB-6-L Principal Balance, and the Class 1-CB-3 Fraction of all interest losses that would otherwise be allocated to
the Class 1-CB-3-L Regular Interest pursuant to clause (ii) of this paragraph shall instead be allocated to the Class 1-CB-6-L
Regular Interest, in reduction of accrued but unpaid interest thereon, and then in reduction of the Class 1-CB-6-L Principal
Balance, and (3) until the Class 2-A-6-L Principal Balance has been reduced to zero, all principal losses that would otherwise be
allocated to the Class 2-A-1-L Regular Interest pursuant to clause (i) of this paragraph shall instead be allocated to the Class
2-A-6-L Regular Interest, in reduction of the Class 2-A-6-L Principal Balance, and all interest losses that would otherwise be
allocated to the Class 2-A-1-L Regular Interest pursuant to clause (ii) of this paragraph shall instead be allocated to the Class
2-A-6-L Regular Interest, in reduction of accrued but unpaid interest thereon, and then in reduction of the Class 2-A-6-L Principal
Balance.


For any Distribution Date, any amounts distributed to the Class P-L Regular Interests
pursuant to clauses (I)(c)(i) and (I)(c)(ii) of the definition of “REMIC I Distribution Amount” shall be allocated as a
loss to the most junior Class (or Classes) of Class B-L Regular Interests, until the Class Principal Balance thereof has been
reduced to zero.


Realized Losses allocated to any Class of REMIC I Regular Interests pursuant to this
definition of “Realized Loss” in reduction of the Class Principal Balance thereof (including losses allocated to the
Class B-L Regular Interests pursuant to the immediately preceding paragraph of this definition of “Realized Loss”)
shall also be allocated to the Corresponding Class in reduction of the Class Principal Balance thereof by the same
amount.


On each Distribution Date, after giving effect to the principal distributions and
allocations of losses as provided in this Agreement (without regard to this paragraph), if the aggregate Class Principal Balance of
all outstanding Classes of REMIC I Regular Interests (plus any Cumulative Carry-Forward Subsequent Recoveries Amount for such
Distribution Date for any Loan Group) exceeds the aggregate principal balance of the Mortgage Loans remaining to be paid at the
close of business on the Cut-Off Date, after deduction of (i) all principal payments due on or before the Cut-Off Date in respect
of each such Mortgage Loan whether or not paid, and (ii) all amounts of principal in respect of each Mortgage Loan that have been
received or advanced and included in the REMIC I Available Distribution Amount for Loan Group 1 and Loan Group 2 and all losses in
respect of each Mortgage Loan that have been allocated to the REMIC I Regular Interests on such Distribution Date or prior
Distribution Dates, then such excess will be deemed a principal loss and will be allocated to the most junior Class of Class B-L
Regular Interests, in reduction of the Class Principal Balance thereof.


Recognition Agreement: With respect to a Cooperative Loan, the
recognition agreement between the Cooperative and the originator of such Cooperative Loan.


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


Reference Banks: As defined in
Section 3.19(b).


Regular Interests: (i) With respect to REMIC I, the REMIC I
Regular Interests and (ii) with respect to REMIC II, the REMIC II Regular Interests.


Relief Act Shortfall: With respect to a Loan Group, for any
Distribution Date for any Mortgage Loan in such Loan Group with respect to which the Servicemembers Civil Relief Act, formerly
known as the Soldiers’ and Sailors’ Civil Relief Act of 1940, or any comparable state legislation (collectively, the
“Relief Act”), limits the amount of interest payable by the related Mortgagor, an amount equal to one
month’s interest on such Mortgage Loan at an annual interest rate equal to the excess, if any, of (i) the annual interest
rate otherwise payable by the Mortgagor on the related Due Date under the terms of the related Mortgage Note over (ii) the annual
interest rate payable by the Mortgagor on the related Due Date by application of the Relief Act.


REMIC: A real estate mortgage investment conduit, as such term
is defined in the Code.


REMIC Provisions: Sections 860A through 860G of the Code,
related Code provisions and regulations promulgated thereunder, as the foregoing may be in effect from time to time.


REMIC I: The segregated pool of assets of the Trust consisting
of the REMIC I Assets, which shall be a REMIC pursuant to the Code, with respect to which a separate REMIC election is to be made
and the beneficial interests in which shall be the REMIC I Regular Interests and the Class R-1 Residual Interest.


REMIC I Assets: All of the Mortgage Pool Assets other than the
Yield Maintenance Agreements and any proceeds thereof.


REMIC I Available Distribution Amount:  For each Loan
Group for any Distribution Date, the sum of the following amounts with respect to the Mortgage Loans in such Loan Group:


(1)        the total amount of all cash received by or
on behalf of the Servicer with respect to such Mortgage Loans by the Determination Date for such Distribution Date and not
previously distributed, including Monthly P&I Advances made by the Servicer, Liquidation Proceeds and scheduled amounts of
distributions from Buydown Funds respecting Buydown Loans, if any, except:


(a)        all scheduled payments of principal and
interest collected but due subsequent to such Distribution Date;


(b)        all Curtailments received after the Prior
Period;


(c)        all Payoffs received after the Payoff Period
immediately preceding such Distribution Date (together with any interest payment received with such Payoffs to the extent that it
represents the payment of interest accrued on the Mortgage Loans for the period subsequent to the Prior Period), and interest which
was accrued and received on Payoffs received during the period from the 1st to the 14th day of the month of such Distribution Date,
which interest shall not be included in the calculation of the REMIC I Available Distribution Amount for any Distribution
Date;


(d)        Insurance Proceeds, Liquidation Proceeds and
Subsequent Recoveries received on such Mortgage Loans after the Prior Period;


(e)        all amounts in the Certificate Account which
are due and reimbursable to the Servicer pursuant to the terms of this Agreement;


(f)         the Servicing Fee for each such
Mortgage Loan, and any Special Primary Insurance Premium payable on such Distribution Date with respect to such Mortgage Loan;
and


(g)        Excess Liquidation Proceeds;


(2)        the sum, to the extent not previously
distributed, of the following amounts, to the extent advanced or received, as applicable, by the Servicer:


(a)        any Monthly P&I Advance made by the
Servicer to the Trustee with respect to such Distribution Date relating to such Mortgage Loans; and


(b)        Compensating Interest; and


(3)        the total amount of any cash received during
the Prior Period by the Trustee or the Servicer in respect of a Purchase Obligation under Section 2.07 and Section 2.08 or any
permitted purchase of such a Mortgage Loan.


REMIC I Distribution Amount: (I) For any Distribution Date
prior to the Credit Support Depletion Date, the REMIC I Available Distribution Amount for such Distribution Date shall be
distributed to the REMIC I Regular Interests and the Class R-1 Residual Interest in the following amounts and priority:


(a)        With respect to the Group 1-L, Class C-P-L
and Class C-X-L Regular Interests, on any Distribution Date prior to the Credit Support Depletion Date, to the extent of the REMIC
I Available Distribution Amount for Loan Group 1 for such Distribution Date:


(i)                  first, to the
Class C-P-L Regular Interest, the aggregate for all Class 1-P Mortgage Loans of the product for each Class 1-P Mortgage Loan of the
applicable Class 1-P Fraction and the sum of (x) scheduled payments of principal on such Class 1-P Mortgage Loan due on or before
the related Due Date in respect of which no distribution has been made on any previous Distribution Date and which were received by
the Determination Date, or which have been advanced as part of a Monthly P&I Advance with respect to such Distribution Date,
(y) the principal portion received in respect of such Class 1-P Mortgage Loan during the Prior Period of (1) Curtailments, (2)
Insurance Proceeds, (3) the amount, if any, of the principal portion of the Purchase Price paid pursuant to a Purchase Obligation
or any purchase of a Mortgage Loan permitted hereunder and (4) Liquidation Proceeds and (z) the principal portion of Payoffs
received in respect of such Class 1-P Mortgage Loan during the Payoff Period;


(ii)                second, to the Group 1-A-L
and Class C-X-L Regular Interests, concurrently, the sum of (x) the Interest Distribution Amounts for the Group 1-A-L Regular
Interests and (y) the portion of the Interest Distribution Amount for the Class C-X-L Regular Interest derived from the Group 1
Loans, in each case remaining unpaid from previous Distribution Dates, pro rata according to their respective shares of such unpaid
amounts;


(iii)               third, to the Group 1-A-L and Class
C-X-L Regular Interests, concurrently, the sum of (x) the Interest Distribution Amounts for the Group 1-A-L Regular Interests and
(y) the portion of the Interest Distribution Amount for the Class C-X-L Regular Interest derived from the Group 1 Loans, in each
case for the current Distribution Date, pro rata according to their respective Interest Distribution Amounts;


(iv)              fourth, to the Class R-1 Residual
Interest, until the Class Principal Balance thereof has been reduced to zero;


(v)                fifth, to the Group 1-A-L
Regular Interests, as principal, the Group 1 Senior Principal Distribution Amount (reduced, on the first distribution date, by
$100), sequentially, as follows:


                       
(A)       first, to the Class 1-CB-1-L and Class 1-CB-2-L Regular Interests, pro rata, an amount, up
to the amount of the Group 1 Lockout Priority Amount for that Distribution Date;



                       
(B)       second, to the Class 1-CB-3-L and Class 1-CB-6-L Regular Interests, pro rata, until the
Class 1-CB-3-L and Class 1-CB-6-L Principal Balances have each been reduced to zero;



                       
(C)       third, to the Class 1-CB-5-L Regular Interests, until the Class 1-CB-5-L Principal Balance
has been reduced to zero; and


                        (D)       fourth, to the Class
1-CB-1-L and Class 1-CB-2-L Regular Interests, pro rata, until the Class 1-CB-1-L and Class 1-CB-2-L Principal Balances have each
been reduced to zero;


(b)        With respect to the Group 2-L, Class C-P-L
and Class C-X-L Regular Interests, on any Distribution Date prior to the Credit Support Depletion Date, to the extent of the REMIC
I Available Distribution Amount for Loan Group 2 for such Distribution Date:


(i)                  first, to the
Class C-P-L Regular Interest, the aggregate for all Class 2-P Mortgage Loans of the product for each Class 2-P Mortgage Loan of the
applicable Class 2-P Fraction and the sum of (x) scheduled payments of principal on such Class 2-P Mortgage Loan due on or before
the related Due Date in respect of which no distribution has been made on any previous Distribution Date and which were received by
the Determination Date, or which have been advanced as part of a Monthly P&I Advance with respect to such Distribution Date,
(y) the principal portion received in respect of such Class 2-P Mortgage Loan during the Prior Period of (1) Curtailments, (2)
Insurance Proceeds, (3) the amount, if any, of the principal portion of the Purchase Price paid pursuant to a Purchase Obligation
or any purchase of a Mortgage Loan permitted hereunder and (4) Liquidation Proceeds and (z) the principal portion of Payoffs
received in respect of such Class 2-P Mortgage Loan during the Payoff Period;


(ii)                second, to the Group 2-A-L
and Class C-X-L Regular Interests, concurrently, the sum of (x) the Interest Distribution Amounts for the Group 2-A-L Regular
Interests and (y) the portion of the Interest Distribution Amount for the Class C-X-L Regular Interest derived from the Group 2
Loans, in each case remaining unpaid from previous Distribution Dates, pro rata according to their respective shares of such unpaid
amounts;


(iii)               third, to the Group 2-A-L and Class
C-X-L Regular Interests, concurrently, the sum of (x) the Interest Distribution Amounts for the Group 2-A-L Regular Interests and
(y) the portion of the Interest Distribution Amount for the Class C-X-L Regular Interest derived from the Group 2 Loans, in each
case for the current Distribution Date, pro rata according to their respective Interest Distribution Amounts; and


(iv)              fourth, to the Group 2-A-L Regular
Interests, as principal, the Group 2 Senior Principal Distribution Amount, sequentially, as follows:


                       
(A)       first, to the Class 2-A-1-L and Class 2-A-6-L Regular Interests, pro rata, an amount, up to
the amount of the Group 2 Lockout Priority Amount for that Distribution Date;



                       
(B)       second, to the Class 2-A-2-L and Class 2-A-3-L Regular Interests, pro rata, until the Class
2-A-2-L and Class 2-A-3-L Principal Balances have each been reduced to zero;



                        
(C)       third, to the Class 2-A-5-L Regular Interest, until the Class 2-A-5-L Principal Balance has
been reduced to zero; and


                        (D)       fourth, to the Class
2-A-1-L and Class 2-A-6-L Regular Interests, pro rata, until the Class 2-A-1-L and Class 2-A-6-L Principal Balances have each been
reduced to zero; and


(c)        With respect to the Group 1-L, Group 2-L,
Class C-X-L, Class C-P-L and Class B-L Regular Interests and the Class R-1 Residual Interest, on any Distribution Date prior to the
Credit Support Depletion Date, to the extent of the REMIC I Available Distribution Amounts for the Group 1 and Group 2 Regular
Interests for such Distribution Date remaining after the payment of the amounts pursuant to paragraphs (I)(a) and (I)(b) of this
definition of “REMIC I Distribution Amount”:


(i)                  first, to the
Class C-P-L Regular Interest, to the extent of amounts otherwise available to pay the Subordinate Principal Distribution Amount
(without regard to clause (B)(x) of the definition thereof) on such Distribution Date and to the extent not paid to such Classes on
previous Distribution Dates pursuant to clause (I)(c)(ii) of this definition of “REMIC I Distribution Amount,”
principal in an amount equal to the Class 1-P Fraction or Class 2-P Fraction, as applicable, of any Realized Loss on a Class 1-P or
Class 2-P Mortgage Loan incurred prior to the Prior Period;


(ii)                second, to the Class C-P-L
Regular Interest, to the extent of amounts otherwise available to pay the Subordinate Principal Distribution Amount (without regard
to clause (B)(x) of the definition thereof) on such Distribution Date, principal in an amount equal to the Class 1-P Fraction
or Class 2-P Fraction, as applicable, of any loss on a Class 1-P or Class 2-P Mortgage Loan incurred in the Prior Period;
provided, that any amounts distributed in respect of losses pursuant to paragraph (I)(c)(i) or this paragraph (I)(c)(ii) of
this definition of “REMIC I Distribution Amount” shall not cause a reduction in the Class C-P-L Principal Balance;


(iii)               third, to the Class B-1-L Regular
Interest, the Interest Distribution Amount for such Class of Regular Interests remaining unpaid from previous Distribution
Dates;


(iv)              fourth, to the Class B-1-L Regular
Interest, the Interest Distribution Amount for such Class of Regular Interests for the current Distribution Date;


(v)                fifth, to the Class B-1-L
Regular Interest, the portion of the Subordinate Principal Distribution Amount allocable to such Class of Regular Interests
pursuant to the definition of “Subordinate Principal Distribution Amount,” until the Class B-1-L Principal Balance has
been reduced to zero;


(vi)              sixth, to the Class B-2-L Regular
Interest, the Interest Distribution Amount for such Class of Regular Interests remaining unpaid from previous Distribution
Dates;


(vii)             seventh, to the Class B-2-L Regular Interest,
the Interest Distribution Amount for such Class of Regular Interests for the current Distribution Date;


(viii)           eighth, to the Class B-2-L Regular Interest, the portion of
the Subordinate Principal Distribution Amount allocable to such Class of Regular Interests pursuant to the definition of
“Subordinate Principal Distribution Amount,” until the Class B-2-L Principal Balance has been reduced to zero;


(ix)              ninth, to the Class B-3-L Regular
Interest, the Interest Distribution Amount for such Class of Regular Interests remaining unpaid from previous Distribution
Dates;


(x)                tenth, to the Class B-3-L
Regular Interest, the Interest Distribution Amount for such Class of Regular Interests for the current Distribution Date;


(xi)              eleventh, to the Class B-3-L Regular
Interest, the portion of the Subordinate Principal Distribution Amount allocable to such Class of Regular Interests pursuant to the
definition of “Subordinate Principal Distribution Amount,” until the Class B-3-L Principal Balance has been reduced to
zero;


(xii)             twelfth, to the Class B-4-L Regular Interest,
the Interest Distribution Amount for such Class of Regular Interests remaining unpaid from previous Distribution Dates;


(xiii)           thirteenth, to the Class B-4-L Regular Interest, the
Interest Distribution Amount for such Class of Regular Interests for the current Distribution Date;


(xiv)           fourteenth, to the Class B-4-L Regular Interest, the
portion of the Subordinate Principal Distribution Amount allocable to such Class of Regular Interests pursuant to the definition of
“Subordinate Principal Distribution Amount,” until the Class B-4-L Principal Balance has been reduced to zero;


(xv)            fifteenth, to the Class B-5-L Regular Interest, the
Interest Distribution Amount for such Class of Regular Interests remaining unpaid from previous Distribution Dates;


(xvi)           sixteenth, to the Class B-5-L Regular Interest, the
Interest Distribution Amount for such Class of Regular Interests for the current Distribution Date;


(xvii)        
seventeenth, to the Class B-5-L Regular Interest, the portion of the Subordinate Principal Distribution Amount allocable to such
Class of Regular Interests pursuant to the definition of “Subordinate Principal Distribution Amount,” until the Class
B-5-L Principal Balance has been reduced to zero;


(xviii)        eighteenth,
to the Class B-6-L Regular Interest, the Interest Distribution Amount for such Class of Regular Interests remaining unpaid from
previous Distribution Dates;


(xix)           nineteenth, to the Class B-6-L Regular Interest, the
Interest Distribution Amount for such Class of Regular Interests for the current Distribution Date;


(xx)            twentieth, to the Class B-6-L Regular Interest, the
portion of the Subordinate Principal Distribution Amount allocable to such Class of Regular Interests pursuant to the definition of
“Subordinate Principal Distribution Amount,” until the Class B-6-L Principal Balance has been reduced to zero;


(xxi)           twenty-first, to each Class of REMIC I Regular Interests in
order of seniority (which, from highest to lowest, shall be as follows: the Class C-P-L, Group 1-A-L and Group 2-A-L Regular
Interests of equal seniority, and then Class B-1-L, Class B-2-L, Class B-3-L, Class B-4-L, Class B-5-L and Class B-6-L of
decreasing seniority) the remaining portion, if any, of the REMIC I Available Distribution Amounts for Loan Group 1 and Loan Group
2, up to the amount of unreimbursed Realized Losses allocable to principal previously allocated or to be allocated on such
Distribution Date to such Class, if any; provided, however, that in the case of Classes of REMIC I Regular Interests of
equal seniority, the amount distributable to such Classes shall be allocated among such Classes according to the amount of losses
allocated thereto; provided, further, that any amounts distributed pursuant to this paragraph (I)(c)(xxi) of this definition
of “REMIC I Distribution Amount” shall not cause a reduction in the Class Principal Balances of any of the REMIC I
Regular Interests; and


(xxii)        
twenty-second, to the Class R-1 Residual Interest, the Residual Distribution Amounts for Loan Group 1 and Loan Group 2 for such
Distribution Date.


Notwithstanding the foregoing paragraph (I)(c) of this definition of “REMIC I
Distribution Amount,”


(X)       on any Distribution Date on which both of the
following conditions specified in clauses (1) and (2) are met:


(1)        the aggregate Class Principal Balance of the
Group 1-A-L Regular Interests or the Group 2-A-L Regular Interests has been reduced to zero, and


(2)        either (a) the Class B Percentage for such
Distribution Date is less than 200% of the Class B Percentage as of the Closing Date or (b) the outstanding principal balance of
the Mortgage Loans in Loan Group 1 or Loan Group 2 delinquent 60 days or more averaged over the last six months (including Mortgage
Loans in foreclosure and Mortgage Loans the Mortgaged Property of which is held by REMIC I and acquired by foreclosure or deed in
lieu of foreclosure), as a percentage of the related Subordinate Component Balance, is greater than or equal to 50%,


all principal received or advanced with respect to the Mortgage Loans in the Loan Group
related to the Class A-L Regular Interests that have been paid in full (after distributions of principal to the Class C-P-L Regular
Interest pursuant to paragraph (I)(a)(i), (I)(b)(i), (I)(c)(i) and (I)(c)(ii) above, if applicable) shall be paid as principal to
the remaining Class A-L Regular Interests of the other Regular Interest Group to the extent of and in reduction of the Class
Principal Balances thereof (and, in the case of the Group 1-A-L Regular Interests, in the order of priority of paragraph
(I)(a)(v)(A)-(D) above; and, in the case of the Group 2-A-L Regular Interests, in the order of priority of paragraph
(I)(b)(iv)(A)-(D) above), prior to any distributions of principal to the Class B-L Regular Interests pursuant to paragraph (I)(c)
above; and


(Y)       if on any Distribution Date either of Loan Group 1
or Loan Group 2 is an Undercollateralized Group and the other such Loan Group is an Overcollateralized Group, then the REMIC I
Available Distribution Amount for the Regular Interest Group related to the Overcollateralized Group, to the extent remaining
following distributions of interest and principal to the Group 1-L and Group 2-L Regular Interests pursuant to paragraph (I)(a) or
(I)(b), as applicable, shall be paid in the following priority: (1) first, such remaining amount, up to the Total Transfer Amount
for such Undercollateralized Group, shall be distributed (a) first, to the Class A-L Regular Interests related to such
Undercollateralized Group, in payment of any portion of the Interest Distribution Amounts for such Classes of Regular Interests
remaining unpaid from such Distribution Date or previous Distribution Dates, pro rata according to their respective shares of such
unpaid amounts, and (b) second, to the Class A-L Regular Interests related to such Undercollateralized Group, as principal (and, in
the case of the Group 1-A-L Regular Interests, in the order of priority of paragraph (I)(a)(v)(A)-(D) above; and, in the case of
the Group 2-A-L Regular Interests, in the order of priority of paragraph (I)(b)(iv)(A)-(D) above), and (2) second, any remaining
amount shall be distributed pursuant to paragraph (I)(c) above.


(II)       For any Distribution Date on or after the Credit
Support Depletion Date, the REMIC I Available Distribution Amount for such Distribution Date shall be distributed to the
outstanding Classes of REMIC I Regular Interests and the Class R-1 Residual Interest in the following amounts and
priority:


(a)        With respect to the Group 1-L, Class C-P-L
and Class C-X-L Regular Interests, on each Distribution Date on or after the Credit Support Depletion Date, to the extent of the
REMIC I Available Distribution Amount for Loan Group 1 for such Distribution Date:


(i)                  first, to the
Class C-P-L Regular Interest, principal in the amount that would otherwise be distributed to such Class on such Distribution Date
pursuant to clause (I)(a)(i) of this definition of “REMIC I Distribution Amount”;


(ii)                second, to the Group 1-A-L
and Class C-X-L Regular Interests, the amount payable to each such Class of Regular Interests on prior Distribution Dates pursuant
to clause (I)(a)(iii) or (II)(a)(iii) of this definition of “REMIC I Distribution Amount,” and remaining unpaid, pro
rata according to such amount payable to the extent of amounts available;


(iii)               third, to the Group 1-A-L and Class
C-X-L Regular Interests, concurrently, the sum of (x) the Interest Distribution Amounts for the Group 1-A-L Regular Interests and
(y) the portion of the Interest Distribution Amount for the Class C-X-L Regular Interest derived from the Group 1 Loans, in each
case for the current Distribution Date, pro rata according to their respective Interest Distribution Amounts;


(iv)              fourth, to the Group 1-A-L Regular
Interests, pro rata according to Class Principal Balance, as principal, the Group 1 Senior Principal Distribution Amount; and


(v)                fifth, after any payments to
the Group 2-L Regular Interests pursuant to the last paragraph of this definition of “REMIC I Distribution Amount,” to
the Class R-1 Residual Interest, the Residual Distribution Amount for Loan Group 1 for such Distribution Date.


(b)        With respect to the Group 2-L, Class C-P-L
and Class C-X-L Regular Interests, on each Distribution Date on or after the Credit Support Depletion Date, to the extent of the
REMIC I Available Distribution Amount for Loan Group 2 for such Distribution Date:


(i)                  first, to the
Class C-P-L Regular Interest, principal in the amount that would otherwise be distributed to such Class on such Distribution Date
pursuant to clause (I)(b)(i) of this definition of “REMIC I Distribution Amount”;


(ii)                second, to the Group 2-A-L
and Class C-X-L Regular Interests, the amount payable to each such Class of Regular Interests on prior Distribution Dates pursuant
to clause (I)(b)(iii) or (II)(b)(iii) of this definition of “REMIC I Distribution Amount,” and remaining unpaid, pro
rata according to such amount payable to the extent of amounts available;


(iii)               third, to the Group 2-A-L and Class
C-X-L Regular Interests, concurrently, the sum of (x) the Interest Distribution Amounts for the Group 2-A-L Regular Interests and
(y) the portion of the Interest Distribution Amount for the Class C-X-L Regular Interest derived from the Group 2 Loans, in each
case for the current Distribution Date, pro rata according to their respective Interest Distribution Amounts;


(iv)              fourth, to the Group 2-A-L Regular
Interests, pro rata according to Class Principal Balance, as principal, the Group 2 Senior Principal Distribution Amount; and


(v)                fifth, after any payments to
the Group 1-L Regular Interests pursuant to the last paragraph of this definition of “REMIC I Distribution Amount,” to
the Class R-1 Residual Interest, the Residual Distribution Amount for Loan Group 2 for such Distribution Date.


If on any Distribution Date either of Loan Group 1 or Loan Group 2 is an
Undercollateralized Group and the other such Loan Group is an Overcollateralized Group, then the REMIC I Available Distribution
Amount for the Regular Interest Group related to the Overcollateralized Group, to the extent remaining following distributions of
interest and principal to the Group 1-L, Group 2-L and Class C-P-L Regular Interests pursuant to paragraph (II)(a)(i) through
(II)(a)(iv) or paragraph (II)(b)(i) through (II)(b)(iv), as applicable, shall be paid in the following priority: (1) first, such
remaining amount, up to the Total Transfer Amount for such Undercollateralized Group, shall be distributed (a) first, to the Class
A-L Regular Interests related to such Undercollateralized Group, in payment of any portion of the Interest Distribution Amounts for
such Classes of Regular Interests remaining unpaid from such Distribution Date or previous Distribution Dates, pro rata according
to their respective shares of such unpaid amounts, and (b) second, to the Class A-L Regular Interests related to such
Undercollateralized Group, as principal, pro rata according to Class Principal Balance, and (2) second, any remaining amount shall
be distributed pursuant to paragraph (II)(a)(v) and (II)(b)(v) above, as applicable.


REMIC I Regular Interests: The Classes of undivided beneficial
interests in REMIC I designated as “regular interests” in the table titled “REMIC I Interests” in the
Preliminary Statement hereto. The REMIC I Regular Interests, together with the Class R-1 Residual Interest, shall be deemed to be a
separate series of beneficial interests in the assets of the Trust consisting of the REMIC I Assets pursuant to Section 3806(b)(2)
of the Statutory Trust Statute.


REMIC II: The segregated pool of assets of the Trust consisting
of the REMIC II Assets, which shall be a REMIC pursuant to the Code, with respect to which a separate REMIC election is to be made,
and the beneficial interests in which shall be the REMIC II Regular Interests and the Class R-2 Residual Interest.


REMIC II Assets: The REMIC I Regular Interests.


REMIC II Available Distribution Amount: For the Group 1
Certificates, on any Distribution Date, the aggregate of all distributions to the Group 1-L Regular Interests, and the portions of
the distributions to the Class C-P-L and Class C-X-L Regular Interests paid in respect of Group 1 Loans, in each case pursuant to
clauses (I)(a), (I)(c) and (II)(a) of the definition of “REMIC I Distribution Amount” (which amount shall be available
for distributions to the Group 1 Certificates (other than the Class 1-CB-3 Certificates), the Class 1-CB-3-M Regular Interest, the
Class C-P and Class C-X Certificates and the Class R-2 Residual Interest as provided herein). For the Group 2 Certificates, on any
Distribution Date, the aggregate of all distributions to the Group 2-L Regular Interests, and the portions of the distributions to
the Class C-P-L and Class C-X-L Regular Interests paid in respect of Group 2 Loans, in each case pursuant to clauses (I)(b), (I)(c)
and (II)(b) of the definition of “REMIC I Distribution Amount” (which amount shall be available for distributions to
the Group 2 Certificates (other than the Class 2-A-3 Certificates), the Class 2-A-3-M Regular Interest, the Class C-P and Class C-X
Certificates and the Class R-2 Residual Interest as provided herein). For the Class B Certificates, on any Distribution Date, the
aggregate of all distributions to the Class B-L Regular Interests (which amount shall be available for distributions to the Class B
Certificates and the Class R-3 Residual Interest as provided herein).


REMIC II Distribution Amount:  The REMIC II Available
Distribution Amount for any Distribution Date shall be distributed to the Certificates (other than the Class 1-CB-3 and Class 2-A-3
Certificates), the Class 1-CB-3-M and Class 2-A-3-M Regular Interests and the Class R-2 Residual Interest in the following amounts
and priority:


(a)        With respect to the Group 1 Certificates
(other than the Class 1-CB-3 Certificates), the Class 1-CB-3-M Regular Interest and the Class C-P and Class C-X Certificates to the
extent of the REMIC II Available Distribution Amount for the Group 1 Certificates for such Distribution Date:


(i)                  to each of the
Class C-P and Class C-X Certificates, the portion of the amounts distributed to its Corresponding Class in respect of Group 1 Loans
on such Distribution Date;


(ii)                to each Class of Group 1
Certificates (other than the Class 1-CB-3 and Class 1-CB-4 Certificates), the amounts distributed to its Corresponding Class on
such Distribution Date; and


(iii)       (A) the Class 1-CB-3-M Regular Interest, the
amount distributed as principal to its Corresponding Class on such Distribution Date and (B) to each Class of the Class 1-CB-3-M
Regular Interest and the Class 1-CB-4 Certificates, the amount distributed as interest to the Class 1-CB-3-L Regular Interest on
such Distribution Date, pro rata according to, for each such Class, the product of 1/12 of the Certificate Interest Rate for such
Class and the Class Principal Balance or Class Notional Amount, as applicable, for such Class before allocating principal losses
and giving effect to distributions of principal on such Distribution Date;


(b)        With respect to the Group 2 Certificates
(other than the Class 2-A-3 Certificates), the Class 2-A-3-M Regular Interest and the Class C-P and Class C-X Certificates to the
extent of the REMIC II Available Distribution Amount for the Group 2 Certificates for such Distribution Date:


(i)                  to each of the
Class C-P and Class C-X Certificates, the portion of the amounts distributed to its Corresponding Class in respect of Group 2 Loans
on such Distribution Date;


(ii)                to each Class of Group 2
Certificates (other than the Class 2-A-3 and Class 2-A-4 Certificates), the amounts distributed to its Corresponding Class on such
Distribution Date; and


(iii)       (A) the Class 2-A-3-M Regular Interest, the
amount distributed as principal to its Corresponding Class on such Distribution Date and (B) to each Class of the Class 2-A-3-M
Regular Interest and the Class 2-A-4 Certificates, the amount distributed as interest to the Class 2-A-3-L Regular Interest on such
Distribution Date, pro rata according to, for each such Class, the product of 1/12 of the Certificate Interest Rate for such Class
and the Class Principal Balance or Class Notional Amount, as applicable, for such Class before allocating principal losses and
giving effect to distributions of principal on such Distribution Date; 


(c)        With respect to the Class B Certificates, to
the extent of the REMIC II Available Distribution Amount for the Class B Certificates for such Distribution Date, to each such
Class of Certificates, the amounts distributed to its Corresponding Class on such Distribution Date; and


(d)        To the Class R-2 Residual Interest, the
Residual Distribution Amount for the Class R-2 Residual Interest for such Distribution Date.


In each case where a distribution is required to be made concurrently to two or more
Classes of Certificates pursuant to this definition of “REMIC II Distribution Amount,” if the portion of the REMIC II
Available Distribution Amount from which such distribution is required to be made is insufficient to make such distribution in full
to such Classes, such distribution shall be allocated among such Classes pro rata according to the respective amounts to which they
are otherwise entitled from such distribution.


REMIC II Regular Interests: The Classes of undivided beneficial
interests in REMIC II designated as “regular interests” in the table titled “REMIC II Interests” in the
Preliminary Statement hereto. The REMIC II Regular Interests, together with the Class R-2 Residual Interest, shall be deemed to be
a separate series of beneficial interests in the assets of the Trust consisting of the REMIC II Assets pursuant to Section
3806(b)(2) of the Statutory Trust Statute.


Residual Certificates:  The Class R Certificates.


Residual Distribution Amount: For any Distribution Date, with
respect to the Class R-1 Residual Interest and for Loan Group 1 and Loan Group 2, any portion of the REMIC I Available Distribution
Amount for Loan Group 1 and Loan Group 2, respectively, remaining after all distributions of such REMIC I Available Distribution
Amount pursuant to clauses (I)(a), (I)(b), (I)(c), (II)(a) and (II)(b), as applicable, of the definition of “REMIC I
Distribution Amount” (other than the distributions pursuant to the last subclause of clauses (I)(c), (II)(a) and
(II)(b)).


For any Distribution Date, with respect to the Class R-2 Residual Interest, any portion of
the REMIC II Available Distribution Amount for the Group 1, Group 2 and Class B Certificates remaining after all distributions of
the REMIC II Available Distribution Amount pursuant to clauses (a), (b) and (c) of the definition of “REMIC II Distribution
Amount.”


Upon termination of the obligations created by this Agreement and liquidation of REMIC I
and REMIC II, the amounts which remain on deposit in the Certificate Account after payment to the Holders of the REMIC I Regular
Interests of the amounts set forth in Section 9.01 of this Agreement, and subject to the conditions set forth therein, shall be
distributed to the Class R-1 and Class R-2 Residual Interests in accordance with the preceding sentences of this definition as if
the date of such distribution were a Distribution Date.


Responsible Officer: When used with respect to the Trustee or
the Delaware Trustee, any officer assigned to and working in the Corporate Trust Office (in the case of the Trustee) or its
corporate trust office (in the case of the Delaware Trustee) or, in each case, in a similar group and also, with respect to a
particular matter, any other officer to whom such matter is referred because of such officer’s knowledge of and familiarity
with the particular subject.


ROV Mortgage Loan:  A Mortgage Loan originated by
Washington Mutual Bank or an affiliate thereof with respect to which the value set forth on the appraisal has been appealed and, as
a result, an internal valuation has been conducted and included in a residential appraisal review contained in the related credit
file.


S&P: Standard & Poor’s Ratings Services, a
division of The McGraw-Hill Companies, Inc., provided that at any time it be a Rating Agency.


Secretary of State: The Secretary of State of the State of
Delaware.


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


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


Selling and Servicing Contract: The contract (including the
Washington Mutual Mortgage Securities Corp. Selling Guide and Washington Mutual Mortgage Securities Corp. Servicing Guide to the
extent incorporated by reference therein) between the Company and a Person relating to the sale of the Mortgage Loans to the
Company.


Senior Regular Interests: The Group 1-A-L and Group 2-A-L
Regular Interests.


Senior Subordinate Certificates:  The Subordinate
Certificates other than the Junior Subordinate Certificates.


Servicer:  Washington Mutual Bank, or any successor
thereto appointed as provided pursuant to Section 7.02, acting to service and administer the Mortgage Loans pursuant to Section
3.01.


Servicer Business Day:  Any day other than a Saturday, a
Sunday, or a day on which banking institutions in Seattle, Washington are authorized or obligated by law or executive order to be
closed.


Servicing Fee: For each Mortgage Loan, the fee charged by the
Servicer for servicing and advancing certain expenses with respect to such Mortgage Loan, equal to 1/12 of the product of (i) the
Servicing Fee Rate for such Mortgage Loan and (ii) the outstanding Principal Balance of such Mortgage Loan, payable monthly from
the Certificate Account, the Investment Account or the Custodial Account for P&I.  In addition, any prepayment penalty
received on a Mortgage Loan will be paid as additional servicing compensation to the Servicer.


Servicing Fee Rate:  For each Mortgage Loan, the per annum
rate set forth for such Mortgage Loan in the Mortgage Loan Schedule, equal to 0.250%.


Servicing Officer: Any officer of the Servicer involved in, or
responsible for, the administration and servicing of the Mortgage Loans or the Certificates, as applicable, whose name and specimen
signature appear on a list of servicing officers furnished to the Trustee by the Servicer, as such list may from time to time be
amended.


Special Primary Insurance Policy: Any Primary Insurance Policy
covering a Mortgage Loan the premium of which is payable by the Trustee pursuant to Section 4.04(a), if so identified in the
Mortgage Loan Schedule. There are no Special Primary Insurance Policies with respect to any of the Mortgage Loans.


Special Primary Insurance Premium: With respect to any Special
Primary Insurance Policy, the monthly premium payable thereunder.


Statutory Trust Statute: Chapter 38 of Title 12 of the Delaware
Code, 12 Del.C. §3801 et seq., as the same may be amended from time to time.


Step Down Percentage: For any Distribution Date, the percentage
indicated below:




	
Distribution Date Occurring In

	
Step Down Percentage


	
May 2005 through April 2010

	
0%


	
May 2010 through April 2011

	
30%


	
May 2011 through April 2012

	
40%


	
May 2012 through April 2013

	
60%


	
May 2013 through April 2014

	
80%


	
May 2014 and after

	
100%








 


Streamlined Mortgage Loan:  A Mortgage Loan originated in
connection with the refinance of a mortgage loan pursuant to the streamlined loan documentation program then in effect of the
seller from which the Company acquired the Mortgage Loan.


Stripped Interest Rate: For each Mortgage Loan, the excess, if
any, of the Pass-Through Rate for such Mortgage Loan over 5.500% per annum.


Subordinate Certificates:  The Class B Certificates.


Subordinate Component Balance: With respect to Loan Group 1 for
any date of determination, the then outstanding aggregate Principal Balance of the Group 1 Loans (less the applicable Class 1-P
Fraction thereof with respect to any Class 1-P Mortgage Loan) minus the then outstanding aggregate Class Principal Balance of the
Group 1-A Certificates and Residual Certificates. With respect to Loan Group 2 for any date of determination, the then outstanding
aggregate Principal Balance of the Group 2 Loans (less the applicable Class 2-P Fraction thereof with respect to any Class 2-P
Mortgage Loan) minus the then outstanding aggregate Class Principal Balance of the Group 2-A Certificates.  


Subordinate Liquidation Amount: For any Distribution Date, the
excess, if any, of the sum of (A) the aggregate of Liquidation Principal for all Mortgage Loans which became Liquidated Mortgage
Loans during the Prior Period and (B) any Subsequent Recoveries for such Distribution Date for Loan Group 1 and Loan Group 2, over
the sum of the Group 1 Senior Liquidation Amount and the Group 2 Senior Liquidation Amount for such Distribution Date.


Subordinate Percentage:  The Group 1 Subordinate
Percentage or Group 2 Subordinate Percentage, as applicable.


Subordinate Principal Distribution Amount: For any Distribution
Date, the excess of (A) the sum of (i) the Group 1 Subordinate Percentage of the Principal Payment Amount for Loan Group 1
(exclusive of the portion thereof attributable to principal distributions to the Class C-P-L Regular Interest pursuant to clause
(I)(a)(i) of the definition of “REMIC I Distribution Amount”), (ii) the Group 2 Subordinate Percentage of the Principal
Payment Amount for Loan Group 2 (exclusive of the portion thereof attributable to principal distributions to the Class C-P-L
Regular Interest pursuant to clause (I)(b)(i) of the definition of “REMIC I Distribution Amount”), (iii) the
Subordinate Principal Prepayments Distribution Amount (without regard to the proviso in the definition thereof) and (iv) the
Subordinate Liquidation Amount over (B) the sum of (x) the amounts required to be distributed to the Class C-P-L Regular Interest
pursuant to clauses (I)(c)(i) and (I)(c)(ii) of the definition of “REMIC I Distribution Amount” on such Distribution
Date, (y) in the event that the aggregate Class Principal Balance of the Group 1-A-L or Group 2-A-L Regular Interests has been
reduced to zero, principal paid from the REMIC I Available Distribution Amount related to such Class A-L Regular Interests to the
remaining Class A-L Regular Interests, as set forth in clause (X) of the sentence immediately following paragraph (I)(c) of the
definition of “REMIC I Distribution Amount,” and (z) the amounts paid from the REMIC I Available Distribution Amount
for an Overcollateralized Group to the Class A-L Regular Interests related to an Undercollateralized Group pursuant to clause (Y)
of the sentence immediately following paragraph (I)(c) of the definition of “REMIC I Distribution Amount.”


On any Distribution Date, the Subordinate Principal Distribution Amount shall be allocated
pro rata, by Class Principal Balance, among the Classes of Class B-L Regular Interests and paid in the order of distribution to
such Classes pursuant to clause (I)(c) of the definition of “REMIC I Distribution Amount” except as otherwise stated in
such definition. Notwithstanding the foregoing, on any Distribution Date prior to distributions on such date, if the Subordination
Level for any Class of Class B-L Regular Interests is less than such Subordination Level as of the Closing Date, the pro rata
portion of the Subordinate Principal Prepayments Distribution Amount otherwise allocable to the Class or Classes of Class B-L
Regular Interests junior to such Class will be distributed to the most senior Class of Class B-L Regular Interests for which the
Subordination Level is less than the Subordination Level as of the Closing Date, and to the Class or Classes of Class B-L Regular
Interests senior thereto, pro rata according to the Class Principal Balances of such Classes. For purposes of this definition and
the definition of “Subordination Level,” the relative seniority, from highest to lowest, of the Class B-L Regular
Interests shall be as follows: Class B-1-L, Class B-2-L, Class B-3-L, Class B-4-L, Class B-5-L and Class B-6-L.


Subordinate Principal Prepayments Distribution Amount: For any
Distribution Date, the sum of (i) the Group 1 Subordinate Prepayment Percentage of the Principal Prepayment Amount for Loan Group 1
(exclusive of the portion thereof attributable to principal distributions to the Class C-P-L Regular Interest pursuant to clause
(I)(a)(i) of the definition of “REMIC I Distribution Amount”) and (ii) the Group 2 Subordinate Prepayment Percentage of
the Principal Prepayment Amount for Loan Group 2 (exclusive of the portion thereof attributable to principal distributions to the
Class C-P-L Regular Interest pursuant to clause (I)(b)(i) of the definition of “REMIC I Distribution Amount”);
provided, however, that if the amount specified in clause (B) of the definition of “Subordinate Principal Distribution
Amount” is greater than the sum of the amounts specified in clauses (A)(i), (A)(ii) and (A)(iv) of such definition, then the
Subordinate Principal Prepayments Distribution Amount shall be reduced by the amount of such excess.


Subordination Level: On any specified date, with respect to any
Class of Class B-L Regular Interests, the percentage obtained by dividing the aggregate Class Principal Balance of the Classes of
Class B-L Regular Interests which are subordinate in right of payment to such Class by the aggregate Class Principal Balance of the
REMIC I Regular Interests as of such date prior to giving effect to distributions of principal and interest and allocations of
Realized Losses on the Mortgage Loans on such date.


Subsequent Recoveries: For any Distribution Date and any Loan
Group, amounts received by the Servicer during the Prior Period (after deduction of amounts reimbursable under Section 3.05(a)(i)
and (ii)) in connection with the liquidation of defaulted Mortgage Loans in such Loan Group after such Mortgage Loans became
Liquidated Mortgage Loans, for each such Mortgage Loan up to the amount of Realized Losses, if any, previously allocated in respect
of such Mortgage Loan in reduction of the Class Principal Balance of any Class of Certificates.


Substitute Mortgage Loan: A Mortgage Loan which is substituted
for another Mortgage Loan pursuant to and in accordance with the provisions of Section 2.07.


Tax Matters Person: With respect to each of REMIC I and REMIC
II, a Holder of a Class R Certificate with a Percentage Interest of at least 0.01% or any Permitted Transferee of such Class R
Certificateholder designated as succeeding to the position of Tax Matters Person in a notice to the Trustee signed by authorized
representatives of the transferor and transferee of such Class R Certificate. The Servicer is hereby appointed to act as the Tax
Matters Person for REMIC I and REMIC II so long as it holds a Class R Certificate with a Percentage Interest of at least
0.01%.  The Servicer is hereby appointed to act as agent for the Tax Matters Person for REMIC I and REMIC II, to perform the
functions of such Tax Matters Person as provided herein, so long as an affiliate of the Servicer is the Servicer hereunder, in the
event that the Servicer ceases to hold a Class R Certificate with the required Percentage Interest. If the Tax Matters Person for
REMIC I and REMIC II becomes a Disqualified Organization, the last preceding Holder, that is not a Disqualified Organization, of
the Class R Certificate held by the Disqualified Organization shall be Tax Matters Person pursuant to and as permitted by Section
5.01(c). If any Person is appointed as tax matters person by the Internal Revenue Service pursuant to the Code, such Person shall
be Tax Matters Person.


Termination Date: The date upon which final payment of the
Certificates will be made pursuant to the procedures set forth in Section 9.01(b).


Termination Payment: The final payment delivered to the
Certificateholders on the Termination Date pursuant to the procedures set forth in Section 9.01(b).


Total Transfer Amount:  For any Distribution Date and for
an Undercollateralized Group, an amount equal to the sum of the Interest Transfer Amount and the Principal Transfer Amount for such
Undercollateralized Group.


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


Transferee: Any Person who is acquiring by Transfer any
Ownership Interest in a Residual Certificate.


Transferee Affidavit and Agreement: An affidavit and agreement
in the form attached hereto as Exhibit J.


Trust: Washington Mutual Mortgage Pass-Through Certificates
WMALT Series 2005-3 Trust, a Delaware statutory trust, created pursuant to this Agreement.


Trustee: LaSalle Bank National Association, or its
successor-in-interest as provided in Section 8.09, or any successor trustee appointed as herein provided.


Uncollected Interest: With respect to any Distribution Date for
any Mortgage Loan on which a Payoff was made by a Mortgagor during the related Payoff Period, except for Payoffs received during
the period from the first through the 14th day of the month of such Distribution Date, an amount equal to one month’s
interest at the applicable Pass-Through Rate on such Mortgage Loan less the amount of interest actually paid by the Mortgagor with
respect to such Payoff.


Uncompensated Interest Shortfall: With respect to a Loan Group,
for any Distribution Date, the sum of (i) the aggregate Relief Act Shortfall for such Distribution Date with respect to the
Mortgage Loans in such Loan Group, (ii) aggregate Curtailment Shortfall for such Distribution Date with respect to the Mortgage
Loans in such Loan Group and (iii) the excess, if any, of (a) aggregate Uncollected Interest for such Distribution Date with
respect to the Mortgage Loans in such Loan Group over (b) Compensating Interest for such Distribution Date with respect to the
Mortgage Loans in such Loan Group.


Uncompensated Interest Shortfall for Loan Group 1 shall be allocated to the Group 1-A-L
Regular Interests and the portions of the Class C-X-L and Class B-L Regular Interests that derive their Interest Distribution
Amounts from the Group 1 Loans, pro rata according to the amount of interest accrued but unpaid on each such Class or portion
thereof, in reduction thereof.


Uncompensated Interest Shortfall for Loan Group 2 shall be allocated to the Group 2-A-L
Regular Interests and the portions of the Class C-X-L and Class B-L Regular Interests that derive their Interest Distribution
Amounts from the Group 2 Loans, pro rata according to the amount of interest accrued but unpaid on each such Class or portion
thereof, in reduction thereof.


Undercollateralized Group: For any Distribution Date, Loan
Group 1, if immediately prior to such Distribution Date the aggregate Class Principal Balance of the Group 1-A-L Regular Interests
and the Residual Certificates is greater than the aggregate Principal Balance of the Group 1 Loans (less the applicable Class 1-P
Fraction thereof with respect to each Class 1-P Mortgage Loan); and for any Distribution Date, Loan Group 2, if immediately prior
to such Distribution Date the aggregate Class Principal Balance of the Group 2-A-L Regular Interests is greater than the aggregate
Principal Balance of the Group 2 Loans (less the applicable Class 2-P Fraction thereof with respect to each Class 2-P Mortgage
Loan).


Underwriter: WaMu Capital Corp.


Underwriting Standards: The underwriting standards of
Washington Mutual Bank, or the published underwriting standards of the Company, or, if the related Mortgage Loan was underwritten
pursuant to underwriting standards other than the published underwriting standards of the Company, then such other underwriting
standards.


Uninsured Cause: Any cause of damage to a Mortgaged Property,
the cost of the complete restoration of which is not fully reimbursable under the hazard insurance policies required to be
maintained pursuant to Section 3.07.


U.S. Person: A citizen or resident of the United States, a
corporation, partnership or other entity created or organized in or under the laws of the United States, any state thereof or the
District of Columbia, or an estate or trust that is subject to U.S. federal income tax regardless of the source of its income.


VA: The Department of Veterans Affairs, formerly known as the
Veterans Administration, or any successor thereto.


Withdrawal Date: Any day during the period commencing on the
18th day of the month of the related Distribution Date (or if such day is not a Business Day, the immediately preceding Business
Day) and ending on the last Business Day prior to the 21st day of the month of such Distribution Date. The “related
Due Date” for any Withdrawal Date is the Due Date immediately preceding the related Distribution Date.


Yield Maintenance Account:  The separate trust account
maintained and held by the Trustee pursuant to Section 3.16, which account shall bear a designation clearly indicating that the
funds deposited therein are held in trust for the benefit of the Trust on behalf of the Class 1-CB-3 and Class 2-A-3
Certificateholders, and which account provides that the Trustee may make, or cause to be made, withdrawals therefrom in accordance
with Section 3.16.


Yield Maintenance Agreements:  The transactions evidenced
by the novation agreement, together with the related confirmations, each dated as of April 26, 2005, and any other related
documents thereto, between the Cap Counterparty and the Trustee, which shall be an asset of the Trust.


Yield Maintenance Notional Balance:  For the
Class 1-CB-3 Certificates and the Class 2-A-3 Certificates and for any Distribution Date from and including May 2005 to
and including the related Final Yield Maintenance Payment Date, the corresponding amount listed for such Class and such
Distribution Date in Schedule 1 of the Prospectus.


Yield Maintenance Payment Amount:  For the
Class 1-CB-3 Certificates and for any Distribution Date on or before the related Final Yield Maintenance Payment Date, the
lesser of (a) the amounts received by the Trustee pursuant to the Yield Maintenance Agreement with respect to the Class 1-CB-3
Certificates for such Distribution Date and deposited by the Trustee into the Yield Maintenance Account in accordance with Section
3.16 and (b) the product of (i) the excess, if any, of (x) LIBOR (as determined on the LIBOR Determination Date by the Cap
Counterparty), subject to a maximum of 8.550%, over (y) 4.950%, (ii) the lesser of (a) the Class 1-CB-3 Principal Balance
immediately prior to such Distribution Date and (b) the related Yield Maintenance Notional Balance for such Distribution Date
and (iii) one-twelfth.


For the Class 2-A-3 Certificates and for any Distribution Date on or before the
related Final Yield Maintenance Payment Date, the lesser of (a) the amounts received by the Trustee pursuant to the Yield
Maintenance Agreement with respect to the Class 2-A-3 Certificates for such Distribution Date and deposited by the Trustee
into the Yield Maintenance Account in accordance with Section 3.16 and (b) the product of (i) the excess, if any, of (x) LIBOR (as
determined on the LIBOR Determination Date by the Cap Counterparty), subject to a maximum of 8.950%, over (y) 5.500%, (ii) the
lesser of (a) the Class 2-A-3 Principal Balance immediately prior to such Distribution Date and (b) the related Yield
Maintenance Notional Balance for such Distribution Date and (iii) one-twelfth.


ARTICLE II




Creation of the Trust; Conveyance of the Mortgage Pool Assets, REMIC I Regular Interests

and REMIC II Regular Interests; REMIC
Election and Designations; Original Issuance of Certificates


Section 2.01.        Creation of the Trust.  The Trust is
hereby created and shall be known as “Washington Mutual Mortgage Pass-Through Certificates WMALT Series 2005-3 Trust”.
The purpose of the Trust is, and the Trust shall have the power and authority, to engage in the following activities, all as
provided by and subject to the terms of this Agreement:


(i)         to acquire, hold, lease, manage,
administer, control, invest, reinvest, operate and/or transfer the Mortgage Pool Assets, the REMIC II Assets and the Yield
Maintenance Agreements;


(ii)        to issue the REMIC I Regular Interests, the
REMIC II Regular Interests and the Certificates;


(iii)       to make distributions to the REMIC I Regular
Interests, the REMIC II Regular Interests and the Certificates; and


(iv)       to engage in such other activities, including
entering into agreements, as are described in or required by the terms of this Agreement or as are necessary, suitable or
convenient to accomplish the foregoing or incidental thereto.


LaSalle Bank National Association is hereby appointed as a trustee of the Trust, to have
all the rights, duties and obligations of the Trustee with respect to the Trust expressly set forth hereunder, and LaSalle Bank
National Association hereby accepts such appointment and the Trust created hereby.  Christiana Bank & Trust Company is
hereby appointed as a Delaware trustee of the Trust, to have all the rights, duties and obligations of the Delaware Trustee with
respect to the Trust hereunder, and Christiana Bank & Trust Company hereby accepts such appointment and the Trust created
hereby.  It is the intention of the Company, the Servicer, the Trustee and the Delaware Trustee that the Trust constitute a
statutory trust under the Statutory Trust Statute, that this Agreement constitute the governing instrument of the Trust, and that
this Agreement amend and restate the Original Trust Agreement.  The parties hereto acknowledge and agree that, prior to the
execution and delivery hereof, the Delaware Trustee has filed the Certificate of Trust.  The parties hereto acknowledge that
the Trust includes three separate pools of mortgage loans referred to herein as “Loan Groups” constituting separate
subtrusts for ERISA purposes, and that the assets of each Loan Group are available to make payments to the holders of Certificates
as provided in the definitions of “REMIC I Distribution Amount” and “REMIC II Distribution Amount,” Section
4.01 and Section 4.04 hereof.


The assets of the Trust shall remain in the custody of the Trustee (or Custodian), on
behalf of the Trust, and shall be owned by the Trust except as otherwise expressly set forth herein.  Moneys to the credit of
the Trust shall be held by the Trustee and invested as provided herein.  All assets received and held in the Trust will not be
subject to any right, charge, security interest, lien or claim of any kind in favor of either of LaSalle Bank National Association
or Christiana Bank & Trust Company in its own right, or any Person claiming through it.  Neither the Trustee nor the
Delaware Trustee, on behalf of the Trust, shall have the power or authority to transfer, assign, hypothecate, pledge or otherwise
dispose of any of the assets of the Trust to any Person, except as permitted herein.  No creditor of a beneficiary of the
Trust, of the Trustee, of the Delaware Trustee, of the Servicer or of the Company shall have any right to obtain possession of, or
otherwise exercise legal or equitable remedies with respect to, the property of the Trust, except in accordance with the terms of
this Agreement.


Section 2.02.        Restrictions on Activities of the Trust.
Notwithstanding any other provision of this Agreement and any provision of law that otherwise so empowers the Trust, so long as any
Certificates are outstanding, the Trust shall not, and none of the Trustee, the Delaware Trustee, the Company or the Servicer shall
knowingly cause the Trust to, do any of the following:


(i)         engage in any business or activity
other than those set forth in Section 2.01;


(ii)        incur or assume any indebtedness except for
such indebtedness that may be incurred by the Trust in connection with the execution or performance of this Agreement or any other
agreement contemplated hereby;


(iii)       guarantee or otherwise assume liability for the
debts of any other party;


(iv)       do any act in contravention of this Agreement or
any other agreement contemplated hereby to which the Trust is a party;


(v)        do any act which would make it impossible to
carry on the ordinary business of the Trust;


(vi)       confess a judgment against the Trust;


(vii)      possess or assign the assets of the Trust for other
than a Trust purpose;


(viii)      cause the Trust to lend any funds to any entity,
except as contemplated by this Agreement; or


(ix)       change the purposes and powers of the Trust from
those set forth in this Agreement.


Section 2.03.        Separateness Requirements. Notwithstanding
any other provision of this Agreement and any provision of law that otherwise so empowers the Trust, so long as any Certificates
are outstanding, the Trust shall perform the following:


(i)         except as expressly permitted by this
Agreement or the Custodial Agreement, maintain its books, records, bank accounts and files separate from those of any other
Person;


(ii)        except as expressly permitted by this
Agreement, maintain its assets in its own separate name and in such a manner that it is not costly or difficult to segregate,
identify, or ascertain such assets;


(iii)       consider the interests of the Trust's creditors
in connection with its actions;


(iv)       hold itself out to creditors and the public as a
legal entity separate and distinct from any other Person and correct any known misunderstanding regarding its separate identity and
refrain from engaging in any activity that compromises the separate legal identity of the Trust;


(v)        prepare and maintain separate records,
accounts and financial statements in accordance with generally accepted accounting principles, consistently applied, and
susceptible to audit.  To the extent it is included in consolidated financial statements or consolidated tax returns, such
financial statements and tax returns will reflect the separateness of the respective entities and indicate that the assets of the
Trust will not be available to satisfy the debts of any other Person;


(vi)       allocate and charge fairly and reasonably any
overhead shared with any other Person;


(vii)      transact all business with affiliates on an
arm's-length basis and pursuant to written, enforceable agreements;


(viii)      conduct business solely in the name of the
Trust.  In that regard all written and oral communications of the Trust, including, without limitation, letters, invoices,
purchase orders and contracts, shall be made solely in the name of the Trust;


(ix)       maintain a separate office through which its
business shall be conducted, provided that such office may be an office of the Trustee, which office shall not be shared with the
Company or any affiliates of the Company;


(x)        in the event that services have been or are
in the future performed or paid by any Person on behalf of the Trust (other than the Trustee, the Delaware Trustee, the Servicer or
the Tax Matters Person as permitted herein), reimburse such Person, as applicable, for the commercially reasonable value of such
services or expenses provided or incurred by such Person.  Accordingly, (i) the Trust shall reimburse such Person, as
applicable, for the commercially reasonable value of such services or expenses provided or incurred by such Person; (ii) to the
extent invoices for such services are not allocated and separately billed to the Trust, the amount thereof that was or is to be
allocated and separately billed to the Trust was or will be reasonably related to the services provided to the Trust; and (iii) any
other allocation of direct, indirect or overhead expenses for items shared between the Trust and any other Person, was or will be,
to the extent practicable, allocated on the basis of actual use or value of services rendered or otherwise on a basis reasonably
related to actual use or the value of services rendered;


(xi)       except as expressly permitted by this Agreement,
not commingle its assets or funds with those of any other Person;


(xii)      except as expressly permitted by this Agreement, not
assume, guarantee, or pay the debts or obligations of any other Person;


(xiii)      except as expressly permitted by this Agreement, not
pledge its assets for the benefit of any other Person;


(xiv)     not hold out its credit or assets as being available to
satisfy the obligations of others;


(xv)      pay its liabilities only out of its funds;


(xvi)     pay the salaries of its own employees, if any;
and


(xvii)     cause the agents and other representatives of the Trust, if
any, to act at all times with respect to the Trust consistently and in furtherance of the foregoing.


None of the Trustee, the Delaware Trustee, the Company or the Servicer shall  take
any action that is inconsistent with the purposes of the Trust or Section 2.02 or Section 2.03.  Neither the Company nor the
Servicer shall direct the Trustee or the Delaware Trustee to take any action that is inconsistent with the purposes of the Trust or
Section 2.02 or Section 2.03.


Section 2.04.        Conveyance of Mortgage Pool Assets; Security
Interest.


Concurrently with the execution and delivery hereof, the Company does hereby irrevocably
sell, transfer, assign, set over and otherwise convey to the Trust, without recourse, all the Company’s right, title and
interest in and to the Mortgage Pool Assets (such transfer and assignment by the Company to be referred to herein as the
“Conveyance”).


It is the express intent of the parties hereto that the Conveyance of the Mortgage Pool
Assets to the Trust by the Company as provided in this Section 2.04 be, and be construed as, an absolute sale of the Mortgage Pool
Assets. It is, further, not the intention of the parties that such Conveyance be deemed the grant of a security interest in the
Mortgage Pool Assets by the Company to the Trust to secure a debt or other obligation of the Company. However, in the event that,
notwithstanding the intent of the parties, the Mortgage Pool Assets are held to be the property of the Company, or if for any other
reason this Agreement is held or deemed to create a security interest in the Mortgage Pool Assets, then


(a)        this Agreement shall constitute a security
agreement;


(b)        the conveyance provided for in this Section
2.04 shall be deemed to be a grant by the Company to the Trust of, and the Company hereby grants to the Trust, to secure all of the
Company’s obligations hereunder, a security interest in all of the Company’s right, title, and interest, whether now
owned or hereafter acquired, in and to:


(I)        The Mortgage Pool Assets;


(II)       All accounts, chattel paper, deposit accounts,
documents, general intangibles, goods, instruments, investment property, letter-of-credit rights, letters of credit, money, and
oil, gas, and other minerals, consisting of, arising from, or relating to, any of the foregoing; and


(III)      All proceeds of the foregoing.


The Company shall file such financing statements, and the Company, the Servicer and the
Trustee acting on behalf of the Trust at the direction of the Company shall, to the extent consistent with this Agreement, take
such other actions as may be necessary to ensure that, if this Agreement were found to create a security interest in the Mortgage
Pool Assets, such security interest would be a perfected security interest of first priority under applicable law and will be
maintained as such throughout the term of the Agreement. In connection herewith, the Trust shall have all of the rights and
remedies of a secured party and creditor under the Uniform Commercial Code as in force in the relevant jurisdiction.


Section 2.05.        Delivery of Mortgage Files.


In connection with the sale, transfer and assignment referred to in Section 2.04, the
Company, concurrently with the execution and delivery hereof, does deliver to, and deposit with, or cause to be delivered to and
deposited with, the Trustee or Custodian the Mortgage Files, which shall at all times be identified in the records of the Trustee
or the Custodian, as applicable, as being held by or on behalf of the Trust.


Concurrently with the execution and delivery hereof, the Company shall cause to be filed
the UCC assignment or amendment referred to in clause (Y)(vii) of the definition of “Mortgage File.”  In
connection with its servicing of Cooperative Loans, the Servicer will use its best efforts to file timely continuation statements,
if necessary, with regard to each financing statement and assignment relating to Cooperative Loans.


In instances where the original recorded Mortgage or any intervening assignment thereof
(recorded or in recordable form) required to be included in the Mortgage File pursuant to the definition of “Mortgage
File” relating to a Mortgage Loan is not included in the Mortgage File delivered to the Trustee (or the Custodian) prior to
or concurrently with the execution and delivery hereof (due to a delay on the part of the recording office), the Company shall
deliver to the Trustee (or the Custodian) a fully legible reproduction (which may be in electronic form) of the original Mortgage
or intervening assignment provided that the originator, the related Lender or the escrow or title company which provided closing
services in connection with such Mortgage Loan certifies on the face of such reproduction(s) or copy as follows: “Certified
true and correct copy of original which has been transmitted for recordation.” For purposes hereof, transmitted for
recordation means having been mailed or otherwise delivered for recordation to the appropriate authority. In all such instances,
the Company shall transmit the original recorded Mortgage and any intervening assignments with evidence of recording thereon (or a
copy of such original Mortgage or intervening assignment certified by the applicable recording office) (which may be in electronic
form) (collectively, “Recording Documents”) to the Trustee (or the Custodian) within 270 days after the
execution and delivery hereof. In instances where, due to a delay on the part of the recording office where any such Recording
Documents have been delivered for recordation, the Recording Documents cannot be delivered to the Trustee within 270 days after
execution and delivery hereof, the Company shall deliver to the Trustee within such time period a certificate (a “Company
Officer’s Certificate”) signed by the Chairman of the Board, President, any Vice President or Treasurer of the
Company stating the date by which the Company expects to receive such Recording Documents from the applicable recording office. In
the event that Recording Documents have still not been received by the Company and delivered to the Trustee (or the Custodian) by
the date specified in its previous Company Officer’s Certificate delivered to the Trustee, the Company shall deliver to the
Trustee by such date an additional Company Officer’s Certificate stating a revised date by which the Company expects to
receive the applicable Recording Documents. This procedure shall be repeated until the Recording Documents have been received by
the Company and delivered to the Trustee (or the Custodian).


For Mortgage Loans for which the Company has received a Payoff after the Cut-Off Date and
prior to the date of execution and delivery hereof, the Company, in lieu of delivering the above documents, herewith delivers to
the Trustee a certification of a Servicing Officer of the nature set forth in Section 3.10.


The Trustee is authorized, with the Servicer’s consent, to appoint any bank or trust
company approved by each of the Company and the Servicer as Custodian of the documents or instruments referred to in this Section
2.05 or in Section 2.10, and to enter into a Custodial Agreement for such purpose; provided, however, that the Trustee shall be and
remain liable for the acts of any such Custodian only to the extent that it is responsible for its own acts hereunder.  Any
documents delivered by the Company or the Servicer to the Custodian, if any, shall be deemed to have been delivered to the Trustee
for all purposes hereunder; and any documents held by the Custodian, if any, shall be deemed to be held by the Trustee for all
purposes hereunder. There shall be a written Custodial Agreement between the Trustee and each Custodian. Each Custodial Agreement
shall contain an acknowledgment by the Custodian that all Mortgage Pool Assets, Mortgage Files, and other documents and property
held by it at any time are held by it for the benefit of the Trust.


On or promptly after the Closing Date, the Servicer shall cause the MERS® System to
indicate that each MERS Loan, if any, has been assigned to “LaSalle Bank National Association, as Custodian/Trustee, without
recourse” or to “Washington Mutual Mortgage Pass-Through Certificates WMALT Series 2005-3 Trust, without
recourse” by including in the MERS® System computer files (a) the code necessary to identify the Trustee and (b) the code
necessary to identify the series of the Certificates issued in connection with such Mortgage Loans; provided, however, that
in the event the Company acquired such Mortgage Loans from an affiliate of the Company, then the Servicer need not cause the
MERS® System to indicate such assignment.  The Servicer shall not alter the codes referenced in this paragraph with
respect to any MERS Loan during the term of this Agreement except in connection with an assignment of such MERS Loan or
de-registration thereof from the MERS® System in accordance with the terms of this Agreement.


Section 2.06.        REMIC Election for REMIC I.


The Tax Matters Person, shall, on behalf of REMIC I, elect to treat REMIC I as a REMIC
within the meaning of Section 860D of the Code and, if necessary, under applicable state laws. Such election shall be included in
the Form 1066 and any appropriate state return to be filed on behalf of REMIC I for its first taxable year.


The Closing Date is hereby designated as the “startup day” of REMIC I within
the meaning of Section 860G(a)(9) of the Code.


The regular interests (as set forth in the table contained in the Preliminary Statement
hereto) relating to REMIC I are hereby designated as “regular interests” in REMIC I for purposes of Section 860G(a)(1)
of the Code. The Class R-1 Residual Interest is hereby designated as the sole class of “residual interest” in REMIC I
for purposes of Section 860G(a)(2) of the Code. The REMIC I Regular Interests and the Class R-1 Residual Interest shall together be
deemed to be a separate series of beneficial interests in the assets of the Trust consisting of the REMIC I Assets pursuant to
Section 3806(b)(2) of the Statutory Trust Statute.


The parties intend that the affairs of REMIC I shall constitute, and that the affairs
of  REMIC I shall be conducted so as to qualify REMIC I as a REMIC. In furtherance of such intention, the Tax Matters Person
shall, on behalf of REMIC I: (a) prepare and file, or cause to be prepared and filed, a federal tax return using a calendar year as
the taxable year and using an accrual method of accounting for REMIC I when and as required by the REMIC Provisions and other
applicable federal income tax laws; (b) make an election, on behalf of the trust, for REMIC I to be treated as a REMIC on the
federal tax return of  REMIC I for its first taxable year, in accordance with the REMIC Provisions; (c) prepare and forward,
or cause to be prepared and forwarded, to the Holders of the REMIC I Regular Interests and the Class R-1 Residual Interest and the
Trustee, all information reports as and when required to be provided to them in accordance with the REMIC Provisions, and make
available the information necessary for the application of Section 860E(e) of the Code; (d) conduct the affairs of REMIC I at all
times that any REMIC I Regular Interests are outstanding so as to maintain the status of REMIC I as a REMIC under the REMIC
Provisions; (e) not knowingly or intentionally take any action or omit to take any action that would cause the termination of the
REMIC status of REMIC I; and (f) pay the amount of any federal prohibited transaction penalty taxes imposed on REMIC I when and as
the same shall be due and payable (but such obligation shall not prevent the Tax Matters Person from contesting any such tax in
appropriate proceedings and shall not prevent the Tax Matters Person from withholding payment of such tax, if permitted by law,
pending the outcome of such proceedings); provided, that the Tax Matters Person shall be entitled to be indemnified by REMIC I for
any such prohibited transaction penalty taxes if the Tax Matters Person’s failure to exercise reasonable care was not the
primary cause of the imposition of such prohibited transaction penalty taxes.


The Company, the Trustee and the Servicer shall promptly provide the Tax Matters Person
with such information in the possession of the Trustee, the Company or the Servicer, respectively, as the Tax Matters Person may
from time to time request for the purpose of enabling the Tax Matters Person to prepare or cause the preparation of tax
returns.  If so requested by the Tax Matters Person, the Trustee shall sign tax returns on behalf of the REMICs.


In the event that a Mortgage Loan is discovered to have a defect which, had such defect
been discovered before the startup day, would have prevented such Mortgage Loan from being a “qualified mortgage”
within the meaning of Section 860G(a)(3) of the Code, and the Company does not repurchase such Mortgage Loan within 90 days of such
date, the Servicer, on behalf of the Trustee, shall within 90 days of the date such defect is discovered sell such Mortgage Loan at
such price as the Servicer in its sole discretion, determines to be the greatest price that will result in the purchase thereof
within 90 days of such date, unless the Servicer delivers to the Trustee an Opinion of Counsel to the effect that continuing to
hold such Mortgage Loan will not adversely affect the status of the electing portion of REMIC I as a REMIC for federal income tax
purposes.


In the event that any tax is imposed on “prohibited transactions” of REMIC I
as defined in Section 860F of the Code and not paid by the Tax Matters Person pursuant to clause (f) of the third preceding
paragraph, such tax shall be charged against amounts otherwise distributable to the Class R-1 Residual Interest. Notwithstanding
anything to the contrary contained herein, the Trustee is hereby authorized to retain from amounts otherwise distributable to the
Class R-1 Residual Interest on any Distribution Date sufficient funds to reimburse the Tax Matters Person (or any agent therefor
appointed in accordance with the definition of “Tax Matters Person” herein, if applicable), for the payment of such tax
(upon the written request of the Tax Matters Person or its agent, to the extent reimbursable, and to the extent that the Tax
Matters Person or its agent has not been previously reimbursed therefor).


Section 2.07.        Acceptance by Trustee. The Trustee
acknowledges receipt (or, with respect to any Mortgage Loan subject to a Custodial Agreement, receipt by the Custodian thereunder)
on behalf of the Trust of the documents (or certified copies thereof as specified in Section 2.05) referred to in Section 2.05
above, but without having made the review required to be made within 45 days pursuant to this Section 2.07. The Trustee
acknowledges that all Mortgage Pool Assets, Mortgage Files, and related documents and property held by it at any time are held by
it as Trustee of the Trust for the benefit of the Trust as holder of the REMIC I Regular Interests and the Class R-1 Residual
Interest. The Trustee agrees, for the benefit of the Trust, to review each Mortgage File within 45 days after the Closing Date and
deliver to the Company a certification in the form attached as Exhibit M hereto, to the effect that, except as noted, all documents
required (in the case of instruments described in clauses (X)(iv) and (Y)(ix) of the definition of “Mortgage File,”
known by the Trustee to be required) pursuant to the definition of “Mortgage File” and Section 2.05 have been executed
and received, and that such documents relate to the Mortgage Loans identified in the Mortgage Loan Schedule. In performing such
review, the Trustee may rely upon the purported genuineness and due execution of any such document, and on the purported
genuineness of any signature thereon. The Trustee shall not be required to make any independent examination of any documents
contained in each Mortgage File beyond the review specifically required herein. The Trustee makes no representations as to: (i) the
validity, legality, enforceability or genuineness of any of the Mortgage Loans identified on the Mortgage Loan Schedule, or (ii)
the collectability, insurability, effectiveness or suitability of any Mortgage Loan. If the Trustee finds any document or documents
constituting a part of a Mortgage File not to have been executed or received, or to be unrelated to the Mortgage Loans identified
in the Mortgage Loan Schedule, the Trustee shall promptly so notify the Company. The Company hereby covenants and agrees that, if
any such defect cannot be corrected or cured, the Company shall, not later than 60 days after the Trustee’s notice to it
respecting such defect, within the three-month period commencing on the Closing Date (or within the two-year period commencing on
the Closing Date if the related Mortgage Loan is a “defective obligation” within the meaning of Section
860G(a)(4)(B)(ii) of the Code and Treasury Regulation Section 1.860G-2(f)), either (i) repurchase the related Mortgage Loan from
the Trust at the Purchase Price, or (ii) substitute for any Mortgage Loan to which such defect relates a different mortgage loan (a
“Substitute Mortgage Loan”) which is a “qualified replacement mortgage” (as defined in the Code)
and, (iii) after such three-month or two-year period, as applicable, the Company shall repurchase the Mortgage Loan from the Trust
at the Purchase Price but only if the Mortgage Loan is in default or default is, in the judgment of the Company, reasonably
imminent. If such defect would cause the Mortgage Loan to be other than a “qualified mortgage” (as defined in the
Code), then notwithstanding the previous sentence or any provision in the definition of “Purchase Price”, the
repurchase or substitution must occur within the sooner of (i) 90 days from the date the defect was discovered or (ii) in the case
of substitution, two years from the Closing Date.


Such Substitute Mortgage Loan shall mature no later than, and not more than two years
earlier than, have a principal balance and Loan-to-Value Ratio equal to or less than, and have a Pass-Through Rate on the date of
substitution equal to or no more than 1 percentage point greater than the Mortgage Loan being substituted for. If the aggregate of
the principal balances of the Substitute Mortgage Loans substituted for a Mortgage Loan is less than the Principal Balance of such
Mortgage Loan, the Company shall pay the difference in cash, together with unpaid accrued interest, if any, on the difference
between the aggregate of the principal balances of the Substitute Mortgage Loans and the Principal Balance of such Mortgage Loan
during the calendar month in which the substitution occurs to the last day of such month at a rate equal to the applicable
Pass-Through Rate, to the Trustee for deposit into the Certificate Account, and such payment by the Company shall be treated in the
same manner as proceeds of the repurchase by the Company of a Mortgage Loan pursuant to this Section 2.07. Furthermore, such
Substitute Mortgage Loan shall otherwise have such characteristics so that the representations and warranties of the Company set
forth in Section 2.08 hereof would not have been incorrect had such Substitute Mortgage Loan originally been a Mortgage Loan, and
the Company shall be deemed to have made such representations and warranties as to such Substitute Mortgage Loan. In addition, such
Substitute Mortgage Loan shall not be a High Cost Loan or Covered Loan (as such terms are defined in the Standard & Poor's
LEVELS® Glossary in effect on the date of substitution, with such exceptions thereto as the Company and S&P may reasonably
agree). A Substitute Mortgage Loan may be substituted for a defective Mortgage Loan whether or not such defective Mortgage Loan is
itself a Substitute Mortgage Loan.  Notwithstanding anything herein to the contrary, each Substitute Mortgage Loan shall be
deemed to have the same Pass-Through Rate as the Mortgage Loan for which it was substituted.


The Purchase Price for each purchased or repurchased Mortgage Loan shall be deposited by
the Company in the Certificate Account and, upon receipt by the Trustee of written notification of such deposit signed by a
Servicing Officer, the Trustee shall (or, if applicable, shall cause the Custodian to) release to the Company or the
Company’s designee the related Mortgage File and shall execute and deliver (or, in the event that the Mortgage Files are held
in the name of the Custodian, shall cause the Custodian to execute and deliver) on behalf of the Trust such instruments of transfer
or assignment, in each case without recourse, as shall be necessary to vest in the Company or its designee or assignee title to any
Mortgage Loan released pursuant hereto. In furtherance of the foregoing, if such Mortgage Loan is a MERS Loan and as a result of
the repurchase thereof such Mortgage Loan shall cease to be serviced by a servicer that is a member of MERS or if the Company or
its assignee shall so request, the Servicer shall cause MERS to execute and deliver an assignment of the Mortgage in recordable
form from MERS to the Company or its assignee and shall cause the Mortgage Loan to be removed from registration on the MERS®
System in accordance with MERS’ rules and procedures. The obligation of the Company to repurchase or substitute any Mortgage
Loan as to which such a defect in a constituent document exists shall constitute the sole remedy respecting such defect available
to the Trust or the Holders of the REMIC I Regular Interests or the Class R-1 Residual Interest.


Section 2.08.        Representations and Warranties of the Company
Concerning the Mortgage Loans. With respect to the conveyance of the Mortgage Loans provided for in Section 2.04 herein,
the Company hereby represents and warrants to the Trust that as of the Cut-Off Date unless otherwise indicated:


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


(ii)                As of the Closing Date, each
Mortgage relating to a Mortgage Loan that is not a Cooperative Loan is a valid and enforceable (subject to Section 2.08(xvi)) first
lien on an unencumbered estate in fee simple or (if the related Mortgage Loan is secured by the interest of the Mortgagor as a
lessee under a ground lease) leasehold estate in the related Mortgaged Property subject only to (a) liens for current real property
taxes and special assessments; (b) covenants, conditions and restrictions, rights of way, easements and other matters of public
record as of the date of recording such Mortgage, such exceptions appearing of record being acceptable to mortgage lending
institutions generally or specifically reflected in the appraisal obtained in connection with the origination of the Mortgage Loan;
(c) exceptions set forth in the title insurance policy relating to such Mortgage, such exceptions being acceptable to mortgage
lending institutions generally; and (d) other matters to which like properties are commonly subject which do not materially
interfere with the benefits of the security intended to be provided by the Mortgage;


(iii)               Immediately upon the transfer and
assignment contemplated herein, the Trust shall have good title to, and will be the sole legal owner of, each Mortgage Loan, free
and clear of any encumbrance or lien (other than any lien under this Agreement);


(iv)              As of the day prior to the Cut-Off Date,
all payments due on each Mortgage Loan had been made and no Mortgage Loan had been delinquent (i.e., was more than 30 days past
due) more than once in the preceding 12 months and any such delinquency lasted for no more than 30 days;


(v)                As of the Closing Date, there
is no late assessment for delinquent taxes outstanding against any Mortgaged Property;


(vi)              As of the Closing Date, there is no
offset, defense or counterclaim to any Mortgage Note, including the obligation of the Mortgagor to pay the unpaid principal or
interest on such Mortgage Note except to the extent that the Buydown Agreement for a Buydown Loan forgives certain indebtedness of
a Mortgagor;


(vii)             As of the Closing Date, each Mortgaged Property
is free of damage and in good repair, ordinary wear and tear excepted;


(viii)           Each Mortgage Loan at the time it was made complied with
all applicable local, state and federal laws, including, without limitation, usury, equal credit opportunity, disclosure and
recording laws, and predatory and abusive lending laws applicable to the originating lender;


(ix)              Each Mortgage Loan was originated by a
savings association, savings bank, credit union, insurance company, or similar institution which is supervised and examined by a
federal or state authority or by a mortgagee approved by the FHA and will be serviced by an institution which meets the servicer
eligibility requirements established by the Company;


(x)                As of the Closing Date, each
Mortgage Loan that is not a Cooperative Loan is covered by an ALTA form or CLTA form of mortgagee title insurance policy or other
form of policy of insurance which has been issued by, and is the valid and binding obligation of, a title insurer which, as of the
origination date of such Mortgage Loan, was qualified to do business in the state in which the related Mortgaged Property is
located. Such policy insures the originator of the Mortgage Loan, its successors and assigns as to the first priority lien of the
Mortgage in the original principal amount of the Mortgage Loan subject to the exceptions set forth in such policy. Such policy is
in full force and effect and inures to the benefit of the Trust upon the consummation of the transactions contemplated by this
Agreement and no claims have been made under such policy, and no prior holder of the related Mortgage, including the Company, has
done, by act or omission, anything which would impair the coverage of such policy;


(xi)              All of the Mortgage Loans with
Loan-to-Value Ratios as of the Cut-Off Date in excess of 80% were covered by a Primary Insurance Policy or an FHA insurance policy
or a VA guaranty, and such policy or guaranty is valid and remains in full force and effect;


(xii)             As of the Closing Date, all policies of
insurance required by this Agreement have been validly issued and remain in full force and effect, including such policies covering
the Company or the Servicer;


(xiii)           As of the Closing Date, each insurer issuing a Primary
Insurance Policy holds a rating acceptable to the Rating Agencies;


(xiv)           Each Mortgage (exclusive of any riders thereto) was
documented by appropriate Fannie Mae/Freddie Mac mortgage instruments in effect at the time of origination, or other instruments
approved by the Company;


(xv)            As of the Closing Date, the Mortgaged Property
securing each Mortgage relating to a Mortgage Loan that is not a Cooperative Loan is improved with a one- to four-family dwelling
unit, including units in a duplex, triplex, fourplex, condominium project, townhouse, a planned unit development or a de minimis
planned unit development;


(xvi)           As of the Closing Date, each Mortgage and Mortgage Note is
the legal, valid and binding obligation of the maker thereof and is enforceable in accordance with its terms, except only as such
enforcement may be limited by laws affecting the enforcement of creditors’ rights generally and principles of equity;


(xvii)         As of the date of origination, as to Mortgaged Properties which are
units in condominiums or planned unit developments, all of such units met the applicable Underwriting Standards, are located in a
condominium or planned unit development projects which have received Fannie Mae or Freddie Mac approval, or are approvable by
Fannie Mae or Freddie Mac or have otherwise been approved by the Company;


(xviii)        No Mortgage Loan is a Buydown Loan;


(xix)           Based solely on representations of the Mortgagors obtained
at the origination of the related Mortgage Loans, approximately 82.55% (by Principal Balance) of the Group 1 Loans will be secured
by owner occupied Mortgaged Properties which are the primary residences of the related Mortgagors, approximately 1.88% (by
Principal Balance) of the Group 1 Loans will be secured by owner occupied Mortgaged Properties which were second or vacation homes
of the Mortgagors and approximately 15.57% (by Principal Balance) of the Group 1 Loans will be secured by Mortgaged Properties
which were investor properties of the related Mortgagors; and approximately 92.77% (by Principal Balance) of the Group 2 Loans will
be secured by owner occupied Mortgaged Properties which are the primary residences of the related Mortgagors, approximately 3.09%
(by Principal Balance) of the Group 2 Loans will be secured by owner occupied Mortgaged Properties which were second or vacation
homes of the Mortgagors and approximately 4.14% (by Principal Balance) of the Group 2 Loans will be secured by Mortgaged Properties
which were investor properties of the related Mortgagors;


(xx)            Prior to origination or refinancing, an appraisal of
each Mortgaged Property was made by an appraiser on a form satisfactory to Fannie Mae or Freddie Mac;


(xxi)           The Mortgage Loans have been underwritten substantially in
accordance with the applicable Underwriting Standards;


(xxii)         All of the Mortgage Loans have due-on-sale clauses; however, the due on
sale provisions may not be exercised at the time of a transfer if prohibited by law;


(xxiii)        The Company used no adverse selection procedures in selecting the Mortgage
Loans from among the outstanding fixed-rate conventional mortgage loans purchased by it which were available for inclusion in the
Mortgage Pool and as to which the representations and warranties in this Section 2.08 could be made;


(xxiv)       With respect to each Cooperative Loan, the Cooperative Stock that is pledged as
security for the Cooperative Loan is held by a person as a tenant-stockholder (as defined in Section 216 of the Code) in a
cooperative housing corporation (as defined in Section 216 of the Code);


(xxv)         Each Cooperative Loan is secured by a valid, subsisting and enforceable
(except as such enforcement may be limited by laws affecting the enforcement of creditors’ rights generally and principles of
equity) perfected first lien and security interest in the related Cooperative Stock securing the related Mortgage Note, subject
only to (a) liens of the Cooperative for unpaid assessments representing the Mortgagor’s pro rata share of the
Cooperative’s payments for its blanket mortgage, current and future real property taxes, insurance premiums, maintenance fees
and other assessments to which like collateral is commonly subject, and (b) other matters to which like collateral is commonly
subject which do not materially interfere with the benefits of the security intended to be provided by the Security Agreement;


(xxvi)       With respect to any Mortgage Loan as to which an affidavit has been delivered to
the Trustee certifying that the original Mortgage Note is a Destroyed Mortgage Note, if such Mortgage Loan is subsequently in
default, the enforcement of such Mortgage Loan or of the related Mortgage by or on behalf of the Trust will not be materially
adversely affected by the absence of the original Mortgage Note (or portion thereof, as applicable);


(xxvii)      Based upon an appraisal of the Mortgaged Property securing each Mortgage Loan,
approximately 92.33% (by Principal Balance) of the Group 1 Loans had a current Loan-to-Value Ratio less than or equal to 80%,
approximately 7.68% (by Principal Balance) of the Group 1 Loans had a current Loan-to-Value Ratio greater than 80% but less than or
equal to 95% and no Group 1 Loan had a current Loan-to-Value Ratio greater than 95%; and approximately 97.79% (by Principal
Balance) of the Group 2 Loans had a current Loan-to-Value Ratio less than or equal to 80%, approximately 2.20% (by Principal
Balance) of the Group 2 Loans had a current Loan-to-Value Ratio greater than 80% but less than or equal to 95% and no Group 2 Loans
had a current Loan-to-Value Ratio greater than 95%;


(xxviii)   
Approximately 56.00% (by Principal Balance) of the Group 1 Loans and approximately 64.41% (by Principal Balance) of the Group 2
Loans were originated for the purpose of refinancing existing mortgage debt, including cash-out refinancings; and approximately
44.01% (by Principal Balance) of the Group 1 Loans and approximately 35.59% (by Principal Balance) of the Group 2 Loans were
originated for the purpose of purchasing the Mortgaged Property;


(xxix)       Not less than approximately 18.67% and 14.99% (by Principal Balance) of the Group 1
Loans and Group 2 Loans, respectively, were originated under full documentation programs;


(xxx)         Each Mortgage Loan constitutes a qualified mortgage under Section
860G(a)(3)(A) of the Code and Treasury Regulations Section 1.860G-2(a)(1);


(xxxi)       No Mortgage Loan is a High Cost Loan or Covered Loan (as such terms are defined in
the Standard & Poor's LEVELS® Glossary in effect on the Closing Date, which is now Version 5.6b Revised, Appendix E,
applicable portions of which are attached hereto as Exhibit C), and no mortgage loan originated on or after October 1, 2002 through
March 6, 2003 is governed by the Georgia Fair Lending Act;


(xxxii)      No Mortgage Loan is subject to the Home Ownership and Equity Protection Act of 1994 or
Section 226.32 of Regulation Z, is a “high-cost” loan or a “predatory” loan as defined under any state or
local law or regulation applicable to the originator of such Mortgage Loan or which would result in liability to the purchaser or
assignee of such Mortgage Loan under any predatory or abusive lending law, or, without limiting the generality of the foregoing, is
a “covered” loan under the laws of the states of California, Colorado or Ohio; and


(xxxiii)    No
Mortgage Loan has a Closing Date Loan-to-Value Ratio greater than 100%.


It is understood and agreed that the representations and warranties set forth in this
Section 2.08 shall survive delivery of the respective Mortgage Files to the Trustee or the Custodian, as the case may be, and shall
continue throughout the term of this Agreement. Upon discovery by any of the Company, the Servicer, the Trustee or the Custodian of
a breach of any of the foregoing representations and warranties (in the case of a breach of the representation set forth in clause
(xxxiii) of this Section 2.08, as based on a determination of the applicable Closing Date Loan-to-Value Ratio using such evidence
as is reasonably designed to approximate the value of the applicable Mortgaged Property as of the Closing Date) which materially
and adversely affects the value of the related Mortgage Loans or the interests of the Trust in the related Mortgage Loans, the
Company, the Servicer, the Trustee or the Custodian, as the case may be, discovering such breach shall give prompt written notice
to the others. Any breach of the representation set forth in clause (xxxi) or clause (xxxii) of this Section 2.08 shall be deemed
to materially and adversely affect the value of the related Mortgage Loans or the interests of the Trust in the related Mortgage
Loans. Within 90 days of its discovery or its receipt of notice of breach, the Company shall repurchase, subject to the limitations
set forth in the definition of “Purchase Price,” or substitute for the affected Mortgage Loan or Mortgage Loans or any
property acquired in respect thereof from the Trust, unless it has cured such breach in all material respects; provided,
however, that in the case of a breach of the representation set forth in clause (xxxiii) of this Section 2.08, any such
substitution may be made only within two years after the Closing Date. After the end of the three-month period beginning on the
“start-up day,” any such substitution shall be made only if the Company provides to the Trustee an Opinion of Counsel
addressed to the Trust and the Trustee reasonably satisfactory to the Trustee that each Substitute Mortgage Loan will be a
“qualified replacement mortgage” within the meaning of Section 860G(a)(4) of the Code. Such substitution shall be made
in the manner and within the time limits set forth in Section 2.07. Any such repurchase by the Company shall be accomplished in the
manner and at the Purchase Price, if applicable, but shall not be subject to the time limits, set forth in Section 2.07. It is
understood and agreed that the obligation of the Company to provide such substitution or to make such repurchase of any affected
Mortgage Loan or Mortgage Loans or any property acquired in respect thereof as to which a breach has occurred and is continuing
shall constitute the sole remedy respecting such breach available to the Holders of the REMIC I Regular Interests and the Class R-1
Residual Interest or the Trustee on behalf of the Holders of the REMIC I Regular Interests and the Class R-1 Residual
Interest.


Section 2.09.        Acknowledgment of Transfer of Mortgage Pool
Assets. The Trustee hereby  acknowledges and accepts on behalf of the Trust the transfer and assignment to the
Trust of the Mortgage Pool Assets, but without having made the review required to be made within 45 days pursuant to Section 2.07,
and declares that as of the Closing Date it holds and shall hold any documents constituting a part of the Mortgage Pool Assets, and
the Mortgage Pool Assets, as Trustee in trust, upon the trust herein set forth, for the use and benefit of all present and future
Holders of the REMIC I Regular Interests and the Class R-1 Residual Interest.  In connection therewith, as of the Closing
Date, in exchange for the Mortgage Pool Assets, the Trust does hereby issue to the Company the REMIC I Regular Interests and the
Class R-1 Residual Interest.


Section 2.10.        Conveyance of REMIC II Assets; Security
Interest.  Concurrently with the execution and delivery hereof, the Company does hereby irrevocably sell, transfer,
assign, set over, and otherwise convey to the Trust, without recourse, all the Company’s right, title and interest in and to
the REMIC II Assets. Pursuant to Section 3818 of the Statutory Trust Statute, the REMIC I Regular Interests shall not be cancelled
and shall be held as treasury interests owned by the Trust. The Trustee acknowledges that the REMIC II Assets are held by it as
Trustee of the Trust for the benefit of the holders of the Certificates. It is the express intent of the parties hereto that the
conveyance of the REMIC II Assets to the Trust by the Company as provided in this Section 2.10 be, and be construed as, an absolute
sale of the REMIC II Assets. It is, further, not the intention of the parties that such conveyance be deemed the grant of a
security interest in the REMIC II Assets by the Company to the Trust to secure a debt or other obligation of the Company. However,
in the event that, notwithstanding the intent of the parties, the REMIC II Assets are held to be the property of the Company, or if
for any other reason this Agreement is held or deemed to create a security interest in the REMIC II Assets, then


(a)        this Agreement shall constitute a security
agreement;


(b)        the conveyance provided for in this Section
2.10 shall be deemed to be a grant by the Company to the Trust of, and the Company hereby grants to the Trust, to secure all of the
Company’s obligations hereunder, a security interest in all of the Company’s right, title, and interest, whether now
owned or hereafter acquired, in and to:


(I)        The REMIC I Regular Interests, including
without limitation all rights represented thereby in and to the Mortgage Pool Assets and the proceeds thereof;


(II)       All accounts, chattel paper, deposit accounts,
documents, general intangibles, goods, instruments, investment property, letter-of-credit rights, letters of credit, money, and
oil, gas, and other minerals, consisting of, arising from, or relating to, any of the foregoing; and


(III)      All proceeds of the foregoing.


The Company shall file such financing statements, and the Company and the Trustee acting
on behalf of the Trust at the direction of the Company shall, to the extent consistent with this Agreement, take such other actions
as may be necessary to ensure that, if this Agreement were found to create a security interest in the REMIC II Assets, such
security interest would be a perfected security interest of first priority under applicable law and will be maintained as such
throughout the term of this Agreement. In connection herewith, the Trust shall have all of the rights and remedies of a secured
party and creditor under the Uniform Commercial Code as in force in the relevant jurisdiction.


Section 2.11.        REMIC Election for REMIC II.


The Tax Matters Person shall, on behalf of REMIC II, elect to treat REMIC II as a REMIC
within the meaning of Section 860D of the Code and, if necessary, under applicable state laws. Such election shall be included in
the Form 1066 and any appropriate state return to be filed on behalf of REMIC II for its first taxable year.


The Closing Date is hereby designated as the “startup day” of REMIC II within
the meaning of Section 860G(a)(9) of the Code.


The regular interests (as set forth in the table contained in the Preliminary Statement
hereto) relating to REMIC II are hereby designated as “regular interests” in REMIC II for purposes of Section
860G(a)(1) of the Code. The Class R-2 Residual Interest is hereby designated as the sole class of “residual interest”
in REMIC II for purposes of Section 860G(a)(2) of the Code. The REMIC II Regular Interests and the Class R-2 Residual Interest
shall together be deemed to be a separate series of beneficial interests in the assets of the Trust consisting of the REMIC II
Assets pursuant to Section 3806(b)(2) of the Statutory Trust Statute.


The parties intend that the affairs of REMIC II shall constitute, and that the affairs of
REMIC II shall be conducted so as to qualify it as, a REMIC. In furtherance of such intention, the Tax Matters Person shall, on
behalf of REMIC II: (a) prepare and file, or cause to be prepared and filed, a federal tax return using a calendar year as the
taxable year for REMIC II when and as required by the REMIC provisions and other applicable federal income tax laws; (b) make an
election, on behalf of REMIC II, to be treated as a REMIC on the federal tax return of REMIC II for its first taxable year, in
accordance with the REMIC provisions; (c) prepare and forward, or cause to be prepared and forwarded, to the Certificateholders and
the Holders of the Class R-2 Residual Interest all information reports as and when required to be provided to them in accordance
with the REMIC provisions; (d) conduct the affairs of REMIC II at all times that any of the Certificates are outstanding so as to
maintain the status of REMIC II as a REMIC under the REMIC provisions; (e) not knowingly or intentionally take any action or omit
to take any action that would cause the termination of the REMIC status of REMIC II; and (f) pay the amount of any federal
prohibited transaction penalty taxes imposed on REMIC II when and as the same shall be due and payable (but such obligation shall
not prevent the Tax Matters Person or any other appropriate person from contesting any such tax in appropriate proceedings and
shall not prevent the Tax Matters Person from withholding payment of such tax, if permitted by law, pending the outcome of such
proceedings); provided, that the Tax Matters Person shall be entitled to be indemnified from REMIC II for any such prohibited
transaction penalty taxes if the Tax Matters Person’s failure to exercise reasonable care was not the primary cause of the
imposition of such prohibited transaction penalty taxes.


In the event that any tax is imposed on “prohibited transactions” of REMIC II
as defined in Section 860F of the Code and not paid by the Tax Matters Person pursuant to clause (f) of the preceding paragraph,
such tax shall be charged against amounts otherwise distributable to the Holders of the Class R-2 Residual Interest.
Notwithstanding anything to the contrary contained herein, the Trustee, acting at the request of the Tax Matters Person, is hereby
authorized to retain from amounts otherwise distributable to the Holders of the Class R-2 Residual Interest on any Distribution
Date sufficient funds to reimburse the Tax Matters Person for the payment of such tax (to the extent that the Tax Matters Person
has not been previously reimbursed therefor).


Section 2.12.        Acknowledgement of Transfer of REMIC II Assets;
Authentication of Certificates. The Trustee hereby acknowledges and accepts on behalf of the Trust the assignment to the
Trust of the REMIC II Assets and declares that as of the Closing Date it holds and shall hold any documents constituting a part of
the REMIC II Assets, and the REMIC II Assets, as Trustee in trust, upon the trust herein set forth, for the use and benefit of all
present and future Holders of the Certificates (other than the Class R Certificates) and the Class R-2 Residual Interest.  In
connection therewith, as of the Closing Date, in exchange for the REMIC II Assets, the Trustee on behalf of the Trust shall cause
to be authenticated and delivered, upon and pursuant to the order of the Company, the Certificates in Authorized Denominations.


Section 2.13.        Legal Title. Legal title to all assets of
the Trust shall be vested at all times in the Trust as a separate legal entity.


Section 2.14.        Compliance with ERISA Requirements. For
purposes of ensuring compliance with the requirements of the “underwriter’s exemption” (U.S. Department of Labor
Prohibited Transaction Exemption 2002-41, 67 Fed. Reg. 54487 (Aug. 22, 2002)), issued under ERISA, and for the avoidance of any
doubt as to the applicability of other provisions of this Agreement, to the fullest extent permitted by applicable law and except
as contemplated by this Agreement, (1) the Trust shall not be a party to any merger, consolidation or reorganization, or liquidate
or sell its assets and (2) so long as any Certificates are outstanding, none of the Company, the Trustee, the Servicer or the
Delaware Trustee shall institute against the Trust, or join in any institution against the Trust of, any bankruptcy or insolvency
proceedings under any federal or state bankruptcy, insolvency or similar law.


Section 2.15.        Additional Representation of the Company Concerning the
Mortgage Loans. The Company hereby represents and warrants to the Trust that it does not intend for the Mortgage Pool to
include any Mortgage Loan that is a “high-cost home loan” as defined under the New Jersey Home Ownership Security Act
of 2002, the New Mexico Home Loan Protection Act, the Massachusetts Predatory Home Loan Practices Act or the Indiana Home Loan
Practices Act (Indiana Code, Section 24-9 et seq.). Based on the foregoing representation and warranty and on the Company’s
obligation, pursuant to Section 2.08, to repurchase or substitute for the affected Mortgage Loan in the event of a breach of the
representation set forth in clauses (xxxi) or (xxxii) of Section 2.08, the other parties hereto agree and understand that it is not
intended for the Mortgage Pool to include any Mortgage Loan that is a “high-cost home loan” as defined under the New
Jersey Home Ownership Security Act of 2002, the New Mexico Home Loan Protection Act, the Massachusetts Predatory Home Loan
Practices Act or the Indiana Home Loan Practices Act (Indiana Code, Section 24-9 et seq.).


ARTICLE III




Administration and Servicing of Mortgage Loans


Section 3.01.        The Servicer.  Washington Mutual Bank
shall act as Servicer to service and administer the Mortgage Loans on behalf of the Trust in accordance with the terms hereof,
consistent with prudent mortgage loan servicing practices and (unless inconsistent with prudent mortgage loan servicing practices)
in the same manner in which, and with the same care, skill, prudence and diligence with which, it services and administers similar
mortgage loans for other portfolios, and shall have full power and authority to do or cause to be done any and all things in
connection with such servicing and administration which a prudent servicer of mortgage loans would do under similar circumstances,
including, without limitation, the power and authority to bring actions and defend the Mortgage Pool Assets on behalf of the Trust
in order to enforce the terms of the Mortgage Notes.  The Servicer may perform its servicing responsibilities through agents
or independent contractors, but shall not thereby be released from any of its responsibilities hereunder and the Servicer shall
diligently pursue all of its rights against such agents or independent contractors.


The Servicer shall make reasonable efforts to collect or cause to be collected all
payments called for under the terms and provisions of the Mortgage Loans and shall, to the extent such procedures shall be
consistent with this Agreement and the terms and provisions of any Primary Insurance Policy, any FHA insurance policy or VA
guaranty, any hazard insurance policy, and federal flood insurance, cause to be followed such collection procedures as are followed
with respect to mortgage loans comparable to the Mortgage Loans and held in portfolios of responsible mortgage lenders in the local
areas where each Mortgaged Property is located. The Servicer shall enforce “due-on-sale” clauses with respect to the
related Mortgage Loans, to the extent permitted by law, subject to the provisions set forth in Section 3.08.


Consistent with the foregoing, the Servicer may, in accordance with prudent mortgage loan
servicing practices, (i) waive or cause to be waived any assumption fee or late payment charge in connection with the prepayment of
any Mortgage Loan and (ii) only upon determining that the coverage of any applicable insurance policy or guaranty related to a
Mortgage Loan will not be materially adversely affected, arrange a schedule, running for no more than 180 days after the first
delinquent Due Date, for payment of any delinquent installment on any Mortgage Note or for the liquidation of delinquent
items.


Consistent with the terms of this Section 3.01, the Servicer may waive, modify or vary any
term of any Mortgage Loan or consent to the postponement of strict compliance with any such term or in any manner grant indulgence
to any Mortgagor if it has determined, exercising its good faith business judgment in the same manner as it would if it were the
owner of the related Mortgage Loan, that the security for, and the timely and full collectability of, such Mortgage Loan would not
be adversely affected by such waiver, modification, postponement or indulgence; provided, however, that (unless the
Mortgagor is in default with respect to the Mortgage Loan or in the reasonable judgment of the Servicer such default is imminent)
the Servicer shall not permit any modification with respect to any Mortgage Loan that would (i) change the applicable Mortgage
Interest Rate, defer or forgive the payment of any principal or interest, reduce the outstanding principal balance (except for
actual payments of principal) or extend the final maturity date with respect to such Mortgage Loan, or (ii) be inconsistent with
the terms of any applicable Primary Insurance Policy, FHA insurance policy, VA guaranty, hazard insurance policy or federal flood
insurance policy. Notwithstanding the foregoing, the Servicer shall not permit any modification with respect to any Mortgage Loan
that would both constitute a sale or exchange of such Mortgage Loan within the meaning of Section 1001 of the Code (including any
proposed, temporary or final regulations promulgated thereunder) (other than in connection with a proposed conveyance or assumption
of such Mortgage Loan that is treated as a Principal Prepayment or in a default situation) and cause any REMIC to fail to qualify
as such under the Code. The Servicer shall be entitled to approve a request from a Mortgagor for a partial release of the related
Mortgaged Property, the granting of an easement thereon in favor of another Person, any alteration or demolition of the related
Mortgaged Property or other similar matters if it has determined, exercising its good faith business judgment in the same manner as
it would if it were the owner of the related Mortgage Loan, that the security for, and the timely and full collectability of, such
Mortgage Loan would not be adversely affected thereby and that REMIC I and REMIC II would not fail to continue to qualify as REMICs
under the Code as a result thereof and that no tax on “prohibited transactions” or “contributions” after
the startup day would be imposed on any REMIC as a result thereof.


The Servicer is hereby authorized and empowered by the Trust to, and shall, execute and
deliver or cause to be executed and delivered on behalf of the Holders of the REMIC I Regular Interests and the Class R-1 Residual
Interest, and the Trust or any of them, any and all instruments of satisfaction or cancellation, or of partial or full release,
discharge or modification, assignments of Mortgages and endorsements of Mortgage Notes in connection with refinancings (in
jurisdictions where such assignments are the customary and usual standard of practice of mortgage lenders) and all other comparable
instruments, with respect to the Mortgage Loans and with respect to the Mortgaged Properties. The Servicer is hereby further
authorized and empowered by the Trust to execute and deliver or cause to be executed and delivered on behalf of the Holders of the
REMIC I Regular Interests and the Class R-1 Residual Interest and the Trust, or any of them, such instruments of assignment or
other comparable instruments as the Servicer shall, in its sole judgment, deem appropriate in order to register any Mortgage Loan
on the MERS® System or to cause the removal of any Mortgage Loan from registration thereon. Any expenses incurred in connection
with the actions described in the preceding sentence shall be borne by the Servicer with no right of reimbursement; provided,
however, that any such expenses incurred as a result of any termination by MERS of the MERS® System shall be reimbursable
to the Servicer.  The Trustee on behalf of the Trust shall execute and furnish to the Servicer, at the Servicer’s
direction, any powers of attorney and other documents prepared by the Servicer and determined by the Servicer to be necessary or
appropriate to enable the Servicer to carry out its supervisory, servicing and administrative duties under this
Agreement.


The Servicer shall obtain (to the extent generally commercially available) and maintain
fidelity bond and errors and omissions coverage acceptable to Fannie Mae or Freddie Mac with respect to its obligations under this
Agreement.  The Servicer shall establish escrow accounts for, or pay when due (by means of an advance), any tax liens in
connection with the Mortgaged Properties that are not paid by the Mortgagors when due to the extent that any such payment would not
constitute a Nonrecoverable Advance when made.


In connection with the servicing and administering of each Mortgage Loan, the Servicer and
any affiliate of the Servicer (i) may perform services such as appraisals, default management and (in the case of affiliates only)
brokerage services that are not customarily provided by servicers of mortgage loans, and shall be entitled to reasonable
compensation therefor and (ii) may, at its own discretion and on behalf of the Trust, obtain credit information in the form of
a “credit score” from a credit repository.


Section 3.02.        Custodial Accounts and Buydown Fund
Accounts. The Servicer shall establish and maintain the Custodial Account for P&I, Buydown Fund Accounts (if any)
and the special Custodial Account for Reserves and shall deposit or cause to be deposited therein daily the following amounts
received or advanced by the Servicer with respect to the Mortgage Loans:


(i)         all scheduled payments of
principal;


(ii)        all scheduled payments of interest, net of
the Servicing Fee due to the Servicer;


(iii)       all Curtailments and Payoffs; and


(iv)       all Insurance Proceeds, Liquidation Proceeds,
Excess Liquidation Proceeds and Subsequent Recoveries;


provided, however, that (x) proceeds received with respect to individual
Mortgage Loans from any title, hazard, or FHA insurance policy, VA guaranty, Primary Insurance Policy or other insurance policy
(other than any Special Primary Insurance Policy) covering such Mortgage Loans, if required for the restoration or repair of the
related Mortgaged Property, may be deposited either in the Custodial Account for Reserves or the Custodial Account for P&I and
(y) such proceeds (other than proceeds from any Special Primary Insurance Policy), if not required for the restoration or repair of
the related Mortgaged Property, and if not released to the Mortgagor in accordance with prudent mortgage loan servicing practices,
shall be deposited in the Custodial Account for P&I, and shall be applied to the balances of the related Mortgage Loans as
payments of interest and principal.


The Servicer is hereby authorized to make withdrawals from and to issue drafts against the
Custodial Accounts for P&I and the Custodial Accounts for Reserves for the purposes required or permitted by this
Agreement.


The Servicer hereby undertakes to assure remittance to the Certificate Account of all
amounts relating to the Mortgage Loans that have been collected by the Servicer and are due to the Certificate Account pursuant to
Section 4.01 of this Agreement.


Funds held in the Custodial Account for P&I and the Custodial Account for Reserves
may, at the Servicer’s option, be invested in (i) one or more Eligible Investments which shall in no event mature later than
the Business Day prior to the related Withdrawal Date (except if such Eligible Investments are obligations of the Trustee, such
Eligible Investments may mature on the Withdrawal Date), or (ii) such other instruments as shall be required to maintain the
Ratings.


Section 3.03.        The Investment Account; Eligible
Investments.(a)     Not later than the Withdrawal Date, the Servicer shall withdraw or direct the
withdrawal of funds in the Custodial Accounts for P&I, for deposit in the Investment Account, in an amount representing:


(i)                  Scheduled
installments of principal and interest on the Mortgage Loans received by the Servicer which were due on the related Due Date, net
of the Servicing Fees and less any amounts to be withdrawn later by the Servicer from the applicable Buydown Fund Accounts;


(ii)                Payoffs and the proceeds of
other types of liquidations of the Mortgage Loans received by the Servicer for such Mortgage Loans during the applicable Payoff
Period, with interest to the date of Payoff or liquidation less any amounts to be withdrawn later by the Servicer from the
applicable Buydown Fund Accounts; and


(iii)               Curtailments received by the
Servicer in the Prior Period.


At its option, the Servicer may invest funds withdrawn from the Custodial Accounts for
P&I, as well as any Buydown Funds, Insurance Proceeds and Liquidation Proceeds previously received by the Servicer (including
amounts paid by the Company in respect of any Purchase Obligation or its substitution obligations set forth in Section 2.07 or
Section 2.08 or by the Servicer in connection with the exercise of the option to terminate this Agreement pursuant to Section 9.01)
for its own account and at its own risk, during any period prior to their deposit in the Certificate Account. Such funds, as well
as any funds which were withdrawn from the Custodial Accounts for P&I on or before the Withdrawal Date, but not yet deposited
into the Certificate Account, shall immediately be deposited by the Servicer with the Investment Depository in an Investment
Account in the name of the Servicer and the Trust for investment only as set forth in this Section 3.03. The Servicer shall bear
any and all losses incurred on any investments made with such funds and shall be entitled to retain all gains realized on such
investments as additional servicing compensation. Not later than the Business Day prior to the Distribution Date, the Servicer
shall deposit such funds, net of any gains (except Payoff Earnings) earned thereon, in the Certificate Account.


(b)        Funds held in the Investment Account shall
be invested in (i) one or more Eligible Investments which shall in no event mature later than the Business Day prior to the related
Distribution Date (except if such Eligible Investments are obligations of the Trustee, such Eligible Investments may mature on the
Distribution Date), or (ii) such other instruments as shall be required to maintain the Ratings.


Section 3.04.        The Certificate Account.


(a)        On or prior to the Closing Date, the Trustee
shall establish or cause to be established the Certificate Account, which shall be entitled “Washington Mutual Mortgage
Pass-Through Certificates WMALT Series 2005-3 Trust Certificate Account under the Pooling and Servicing Agreement, dated as of
April 1, 2005, among Washington Mutual Mortgage Securities Corp., as Depositor, Washington Mutual Bank, as Servicer, LaSalle Bank
National Association, as the Trustee, and Christiana Bank & Trust Company, as the Delaware Trustee, for the benefit of
Washington Mutual Mortgage Pass-Through Certificates WMALT Series 2005-3 Trust created pursuant thereto”.  Promptly
after the Closing Date, the Trustee shall communicate to the Servicer the account number and wiring instructions for the
Certificate Account.


Not later than the Business Day prior to the related Distribution Date, the Servicer shall
direct the Investment Depository to deposit into the Certificate Account the amounts previously deposited into the Investment
Account (which may include a deposit of Eligible Investments) to which the Holders of the REMIC I Regular Interests and the Class
R-1 Residual Interest are entitled or which are necessary for payment of any Special Primary Insurance Premiums. In addition, not
later than the Business Day prior to the Distribution Date, the Servicer shall deposit into the Certificate Account any Monthly
P&I Advances or other payments required to be made by the Servicer pursuant to Section 4.02 of this Agreement and any Insurance
Proceeds or Liquidation Proceeds (including amounts paid by the Company in respect of any Purchase Obligation) not previously
deposited in the Custodial Accounts for P&I or the Investment Account, and any amounts paid by the Servicer in connection with
the exercise of its option to terminate this Agreement pursuant to Section 9.01 or any other purchase of Mortgage Loans permitted
by this Agreement.


(b)        Funds held in the Certificate Account shall
be invested at the written direction of the Servicer in (i) one or more Eligible Investments which shall in no event mature later
than the Business Day prior to the related Distribution Date (except if such Eligible Investments are obligations of the Trustee,
such Eligible Investments may mature on the Distribution Date), or (ii) such other instruments as shall be required to maintain the
Ratings.  The Servicer shall be entitled to receive any gains earned on such Eligible Investments and shall bear any losses
suffered in connection therewith.  If the Trustee has not received such written investment directions from the Servicer, the
Trustee shall not invest funds held in the Certificate Account.  The Trustee shall have no liability for any losses on
investments of funds held in the Certificate Account.


Section 3.05.        
 Permitted Withdrawals from the Certificate Account, the
Investment Account, Custodial Accounts for P&I  and Custodial Accounts
for Reserves and of Buydown Funds from the Buydown Fund Accounts.


(a)        The Servicer is
authorized to make withdrawals (or, in the case of the Certificate Account, to direct the Trustee to make withdrawals), from time
to time, from the Investment Account, the Certificate Account, the Custodial Accounts for P&I or the Custodial Accounts for Reserves of amounts deposited therein in respect of the
Certificates (and, to the extent applicable, to make deposits of the amounts withdrawn), as follows:


(i)                  To reimburse
itself for Monthly P&I Advances made pursuant to Section 4.02, such right to reimbursement pursuant to this paragraph (i) being
limited to amounts received on particular Mortgage Loans (including, for this purpose, Insurance Proceeds and Liquidation Proceeds)
which represent late recoveries of principal and/or interest respecting which any such Monthly P&I Advance was made;


(ii)                To reimburse itself for
amounts expended by or for the account of the Servicer pursuant to Section 3.09 in connection with the restoration of property
damaged by an Uninsured Cause or in connection with the liquidation of a Mortgage Loan;


(iii)               To pay to itself, with respect to
the related Mortgage Loans, the Servicing Fee (net of Compensating Interest reduced by Payoff Earnings and Payoff Interest) as to
which no prior withdrawals from funds deposited by the Servicer have been made;


(iv)              
To reimburse itself
for the following amounts advanced with respect to Mortgage Loans (except for Mortgage Loans purchased by the Servicer):

 (A) amounts advanced with respect to payments of taxes referred to in the last
sentence of the sixth paragraph of Section 3.01 (to the extent that such amounts have not otherwise been recovered by the
Servicer), (B) amounts incurred in maintaining any insurance described in Section 3.07 and (C) amounts which
the Servicer has determined to be Nonrecoverable Advances;


(v)                To pay to itself reinvestment
earnings deposited or earned in the Investment Account and the Certificate Account to which it is entitled and to reimburse itself
for expenses incurred by and reimbursable to it pursuant to Section 6.03;


(vi)              To deposit to the Investment Account
amounts in the Certificate Account not required to be on deposit therein at the time of such withdrawal;


(vii)             To deposit in the Certificate Account, not
later than the Business Day prior to the related Distribution Date, the amounts in the Investment Account specified in Section
3.04(a);


(viii)           To pay on behalf of the Trustee any Special Primary
Insurance Premium payable by the Trustee pursuant to Section 4.04(a); provided, the Servicer shall give written notice
thereof to the Trustee prior to noon New York City time two Business Days prior to the applicable Distribution Date; and


after making or providing for the above withdrawals


(ix)              To clear and terminate the Investment
Account and the Certificate Account following termination of this Agreement pursuant to Section 9.01.


Since, in connection with withdrawals pursuant to paragraphs (i) and (ii), the
Servicer’s entitlement thereto is limited to collections or other recoveries on the related Mortgage Loan, the Servicer shall
keep and maintain, separate accounting for each Mortgage Loan, for the purpose of justifying any such withdrawals.


(b)        The Servicer is authorized to make
withdrawals, from time to time, of Buydown Funds from the Buydown Fund Account or Custodial Account for P&I (and, to the extent
applicable, to make deposits of the amounts withdrawn), as follows:


(i)                  To deposit each
month in the Investment Account the amount necessary to supplement payments received on Buydown Loans;


(ii)                In the event of a Payoff of
any Mortgage Loan having a related Buydown Fund, to apply amounts remaining in Buydown Fund Accounts to reduce the required amount
of such principal Payoff (or, if the Mortgagor has made a Payoff, to refund such remaining Buydown Fund amounts to the Person
entitled thereto);


(iii)               In the event of foreclosure or
liquidation of any Mortgage Loan having a Buydown Fund, to deposit remaining Buydown Fund amounts in the Investment Account as
Liquidation Proceeds; and


(iv)              To clear and terminate the portion of any
account representing Buydown Funds following termination of this Agreement pursuant to Section 9.01.


(c)        The Trustee is authorized to make
withdrawals from time to time from the Certificate Account to reimburse itself for advances it has made as successor Servicer
pursuant to Section 7.01(a) hereof that it has determined to be Nonrecoverable Advances.


Section 3.06.        Maintenance of Primary Insurance Policies; Collections
Thereunder. The Servicer shall use commercially reasonable efforts to keep in full force and effect each Primary
Insurance Policy (except any Special Primary Insurance Policy) required with respect to a Mortgage Loan until no longer required,
and the Servicer shall use commercially reasonable efforts to keep in full force and effect each Special Primary Insurance Policy,
if any. Notwithstanding the foregoing, the Servicer shall have no obligation to maintain any Primary Insurance Policy for a
Mortgage Loan for which the outstanding Principal Balance thereof at any time subsequent to origination was 80% or less of the
Appraised Value of the related Mortgaged Property, unless required by applicable law.


Unless required by applicable law, the Servicer shall not cancel or refuse to renew any
Primary Insurance Policy in effect at the date of the initial issuance of the Certificates that is required to be kept in force
hereunder; provided, however, that the Servicer shall not advance funds for the payment of any premium due under (i) any
Primary Insurance Policy (other than a Special Primary Insurance Policy) if it shall determine that such an advance would be a
Nonrecoverable Advance or (ii) any Special Primary Insurance Policy.


Section 3.07.        Maintenance of Hazard Insurance. The
Servicer shall cause to be maintained for each Mortgage Loan (other than a Cooperative Loan) fire insurance with extended coverage
in an amount which is not less than the original principal balance of such Mortgage Loan, except in cases approved by the Servicer
in which such amount exceeds the value of the improvements to the Mortgaged Property. The Servicer shall also require fire
insurance with extended coverage in a comparable amount on property acquired upon foreclosure, or deed in lieu of foreclosure, of
any Mortgage Loan (other than a Cooperative Loan). Any amounts collected under any such policies (other than amounts to be applied
to the restoration or repair of the related Mortgaged Property) shall be deposited into the Custodial Account for P&I, subject
to withdrawal pursuant to Section 3.03 and Section 3.05. Any unreimbursed costs incurred in maintaining any insurance described in
this Section 3.07 shall be recoverable as an advance by the Servicer from the Custodial Account for P&I, the Investment Account
or the Certificate Account. Such insurance shall be with insurers approved by the Servicer and Fannie Mae or Freddie Mac. Other
additional insurance may be required of a Mortgagor, in addition to that required pursuant to such applicable laws and regulations
as shall at any time be in force and as shall require such additional insurance. Where any part of any improvement to the Mortgaged
Property (other than a Mortgaged Property secured by a Cooperative Loan) is located in a federally designated special flood hazard
area and in a community which participates in the National Flood Insurance Program at the time of origination of the related
Mortgage Loan, the Servicer shall cause flood insurance to be provided. The hazard insurance coverage required by this Section 3.07
may be met with blanket policies providing protection equivalent to individual policies otherwise required.  The Servicer
shall be responsible for paying any deductible amount on any such blanket policy.  The Servicer agrees to present, or cause to
be presented, on behalf of and for the benefit of the Trust, claims under the hazard insurance policy respecting any Mortgage Loan,
and in this regard to take such reasonable actions as shall be necessary to permit recovery under such policy.


Section 3.08.        Enforcement of Due-on-Sale Clauses; Assumption
Agreements. When any Mortgaged Property is about to be conveyed by the Mortgagor, the Servicer shall, to the extent it
has knowledge of such prospective conveyance and prior to the time of the consummation of such conveyance, exercise on behalf of
the Trust the Trust’s rights to accelerate the maturity of such Mortgage Loan, to the extent that such acceleration is
permitted by the terms of the related Mortgage Note, under any “due-on-sale” clause applicable thereto; provided,
however, that the Servicer shall not exercise any such right if the due-on-sale clause, in the reasonable belief of the
Servicer, is not enforceable under applicable law or if such exercise would result in non-coverage of any resulting loss that would
otherwise be covered under any insurance policy. In the event the Servicer is prohibited from exercising such right, the Servicer
is authorized to take or enter into an assumption and modification agreement from or with the Person to whom a Mortgaged Property
has been or is about to be conveyed, pursuant to which such Person becomes liable under the Mortgage Note and, unless prohibited by
applicable state law or unless the Mortgage Note contains a provision allowing a qualified borrower to assume the Mortgage Note,
the Mortgagor remains liable thereon; provided that the Mortgage Loan shall continue to be covered (if so covered before the
Servicer enters such agreement) by any related Primary Insurance Policy. The Servicer is also authorized to enter into a
substitution of liability agreement with such Person, pursuant to which the original Mortgagor is released from liability and such
Person is substituted as Mortgagor and becomes liable under the Mortgage Note.  The Servicer shall not enter into any
substitution or assumption with respect to a Mortgage Loan if such substitution or assumption shall (i) both constitute a
“significant modification” effecting an exchange or reissuance of such Mortgage Loan under the Code (or Treasury
regulations promulgated thereunder) and cause the REMICs to fail to qualify as a REMIC under the REMIC Provisions or (ii) cause the
imposition of any tax on “prohibited transactions” or “contributions” after the startup day under the REMIC
Provisions.  The Servicer shall notify the Trustee that any such substitution or assumption agreement has been completed by
forwarding to the Trustee (or the Custodian) the original copy of such substitution or assumption agreement and other documents and
instruments constituting a part thereof. In connection with any such assumption or substitution agreement, the terms of the related
Mortgage Note shall not be changed. Any fee collected by the Servicer for entering into an assumption or substitution of liability
agreement shall be retained by the Servicer as additional servicing compensation.


Notwithstanding the foregoing paragraph or any other provision of this Agreement, the
Servicer shall not be deemed to be in default, breach or otherwise in violation of any of its obligations hereunder by reason of
any assumption of a Mortgage Loan by operation of law or any assumption which the Servicer may be restricted by law from
preventing, for any reason whatsoever.


Section 3.09.        Realization Upon Defaulted Mortgage Loans.
The Servicer shall foreclose upon or otherwise comparably convert, or cause to be foreclosed upon or comparably converted, the
ownership of any Mortgaged Property securing a Mortgage Loan which comes into and continues in default and as to which no
satisfactory arrangements can be made for collection of delinquent payments pursuant to Section 3.01. In lieu of such foreclosure
or other conversion, and taking into consideration the desirability of maximizing net Liquidation Proceeds after taking into
account the effect of Insurance Proceeds upon Liquidation Proceeds, the Servicer may, to the extent consistent with prudent
mortgage loan servicing practices, accept a payment of less than the outstanding Principal Balance of a delinquent Mortgage Loan in
full satisfaction of the indebtedness evidenced by the related Mortgage Note and release the lien of the related Mortgage upon
receipt of such payment. The Servicer shall not foreclose upon or otherwise comparably convert a Mortgaged Property if the Servicer
is aware of evidence of toxic waste, other hazardous substances or other evidence of environmental contamination thereon and the
Servicer determines that it would be imprudent to do so. In connection with such foreclosure or other conversion, the Servicer
shall cause to be followed such practices and procedures as it shall deem necessary or advisable and as shall be normal and usual
in general mortgage servicing activities. The foregoing is subject to the provision that, in the case of damage to a Mortgaged
Property from an Uninsured Cause, the Servicer shall not be required to advance its own funds towards the restoration of the
property unless it shall be determined in the sole judgment of the Servicer, (i) that such restoration will increase the proceeds
of liquidation of the Mortgage Loan to Certificateholders after reimbursement to itself for such expenses, and (ii) that such
expenses will be recoverable to it through Liquidation Proceeds. The Servicer shall be responsible for all other costs and expenses
incurred by it in any such proceedings; provided, however, that it shall be entitled to reimbursement thereof (as well as
its normal servicing compensation) as an advance. The Servicer shall maintain information required for tax reporting purposes
regarding any Mortgaged Property which is abandoned or which has been foreclosed or otherwise comparably converted. The Servicer
shall report such information to the Internal Revenue Service and the Mortgagor in the manner required by applicable law.


The Servicer may enter into one or more special servicing agreements with a Lowest Class B
Owner, subject to each Rating Agency’s acknowledgment that the Ratings of the Certificates in effect immediately prior to the
entering into of such agreement would not be qualified, downgraded or withdrawn and the Certificates would not be placed on credit
review status (except for possible upgrading) as a result of such agreement.  Any such agreement may contain provisions
whereby such Lowest Class B Owner may (a) instruct the Servicer to commence or delay foreclosure proceedings with respect to
delinquent Mortgage Loans, provided that the Lowest Class B Owner deposits a specified amount of cash with the Servicer that will
be available for distribution to Certificateholders if Liquidation Proceeds are less than they otherwise may have been had the
Servicer acted pursuant to its normal servicing procedures, (b) purchase such delinquent Mortgage Loans from the Trust immediately
prior to the commencement of foreclosure proceedings at a price equal to the aggregate outstanding Principal Balance of such
Mortgage Loans plus accrued interest thereon at the applicable Mortgage Interest Rate through the last day of the month in which
such Mortgage Loans are purchased and/or (c) assume all of the servicing rights and obligations with respect to such delinquent
Mortgage Loans so long as (i) the Servicer has the right to transfer the servicing rights and obligations of such Mortgage Loans to
another servicer and (ii) such Lowest Class B Owner will service such Mortgage Loans in accordance with the terms of this
Agreement.


REMIC I shall not acquire any real property (or personal property incident to such real
property) except in connection with a default or imminent default of a Mortgage Loan. In the event that REMIC I acquires any real
property (or personal property incident to such real property) in connection with a default or imminent default of a Mortgage Loan,
such property shall be disposed of by the Servicer as soon as practicable in a manner that, consistent with prudent mortgage loan
servicing practices, maximizes the net present value of the recovery to the Trust, but in any event within three years after its
acquisition by the Servicer for REMIC I unless the Servicer provides to the Trustee an Opinion of Counsel to the effect that the
holding by REMIC I of such Mortgaged Property subsequent to three years after its acquisition will not result in the imposition of
taxes on “prohibited transactions” of REMIC I as defined in Section 860F of the Code or under the law of any state in
which real property securing a Mortgage Loan owned by REMIC I is located or cause REMIC I to fail to qualify as a REMIC for federal
income tax purposes or for state tax purposes under the laws of any state in which real property securing a Mortgage Loan owned by
REMIC I is located at any time that any Certificates are outstanding. The Servicer shall conserve, protect and operate each such
property for the Certificateholders solely for the purpose of its prompt disposition and sale in a manner which does not cause such
property to fail to qualify as “foreclosure property” within the meaning of Section 860G(a)(8) or result in the receipt
by the REMIC of any “income from non-permitted assets” within the meaning of Section 860F(a)(2)(B) of the Code or any
“net income from foreclosure property” which is subject to taxation under the REMIC Provisions. Pursuant to its efforts
to sell such property, the Servicer shall either itself or through an agent selected by the Servicer protect and conserve such
property in the same manner and to such extent as is customary in the locality where such property is located and may, incident to
its conservation and protection of the assets of the Trust, rent the same, or any part thereof, as the Servicer deems to be in the
best interest of the Servicer and the Trust for the period prior to the sale of such property. Additionally, the Servicer shall
perform the tax withholding and shall file information returns with respect to the receipt of mortgage interests received in a
trade or business, the reports of foreclosures and abandonments of any Mortgaged Property and the information returns relating to
cancellation of indebtedness income with respect to any Mortgaged Property required by Sections 6050H, 6050J and 6050P,
respectively, of the Code, and deliver to the Trustee an Officers’ Certificate on or before March 31 of each year stating
that such reports have been filed.  Such reports shall be in form and substance sufficient to meet the reporting requirements
imposed by Sections 6050H, 6050J and 6050P of the Code.


Notwithstanding any other provision of this Agreement, the Servicer and the Trustee, as
applicable, shall comply with all federal withholding requirements with respect to payments to Certificateholders of interest or
original issue discount that the Servicer or the Trustee reasonably believes are applicable under the Code.  The consent of
Certificateholders shall not be required for any such withholding.  Without limiting the foregoing, the Servicer agrees that
it will not withhold with respect to payments of interest or original issue discount in the case of a Certificateholder that has
furnished or caused to be furnished an effective Form W-8 or an acceptable substitute form or a successor form and who is not a
“10 percent shareholder” within the meaning of Code Section 871(h)(3)(B) or a “controlled foreign
corporation” described in Code Section 881(c)(3)(C) with respect to REMIC I, REMIC II or the  depositor.  In the
event the Trustee withholds any amount from interest or original issue discount payments or advances thereof to any
Certificateholder pursuant to federal withholding requirements, the Trustee shall indicate the amount withheld to such
Certificateholder.


Section 3.10.        Trustee to Cooperate; Release of Mortgage
Files. Upon the Payoff or scheduled maturity of any Mortgage Loan, the Servicer shall cause such final payment to be
immediately deposited in the related Custodial Account for P&I or the Investment Account.  The Servicer shall promptly
notify the Trustee thereof by a certification (which certification shall include a statement to the effect that all amounts
received in connection with such payment which are required to be deposited in either such account have been so deposited) of a
Servicing Officer and shall request delivery to it of the Mortgage File; provided, however, that such certification shall not be
required if the Mortgage File is held by a Custodian which is also the Servicer of the Mortgage Loan. Upon receipt of such
certification and request, the Trustee (or Custodian) shall, not later than the fifth succeeding Business Day, release, or cause to
be released, the related Mortgage File to the Servicer. With any such Payoff or other final payment, the Servicer is authorized (i)
to prepare for and procure from the trustee or mortgagee under the Mortgage which secured the Mortgage Note a deed of full
reconveyance or other form of satisfaction or assignment of Mortgage and endorsement of Mortgage Note in connection with a
refinancing covering the Mortgaged Property, which satisfaction, endorsed Mortgage Note or assigning document shall be delivered by
the Servicer to the person or persons entitled thereto, and (ii) with respect to any MERS Loan, to cause the removal of such
Mortgage Loan from registration on the MERS® System. No expenses incurred in connection with such satisfaction or assignment
shall be payable to the Servicer by the Trustee or from the Certificate Account, the related Investment Account or the related
Custodial Account for P&I. From time to time as appropriate for the servicing or foreclosure of any Mortgage Loan, including,
for this purpose, collection under any Primary Insurance Policy, the Trustee (or Custodian) shall, upon request of the Servicer and
delivery to it of a trust receipt signed by a Servicing Officer, release not later than the fifth Business Day following the date
of receipt of such request and trust receipt the related Mortgage File to the Servicer and shall execute such documents as shall be
necessary to the prosecution of any such proceedings. Such trust receipt shall obligate the Servicer to return the Mortgage File to
the Trustee (or Custodian) when the need therefor by the Servicer no longer exists, unless the Mortgage Loan shall be liquidated,
in which case, upon receipt of a certificate of a Servicing Officer similar to that herein above specified, the trust receipt shall
be released by the Trustee to the Servicer.


Section 3.11.        Compensation to the Servicer. As
compensation for its activities hereunder, the Servicer shall be entitled to receive from the accounts listed in Section 3.05(a)
the amounts provided for by Section 3.05(a)(iii). The Servicer shall be required to pay all expenses incurred by it in connection
with its activities hereunder and shall not be entitled to reimbursement therefor, except as specifically provided herein.


Section 3.12.        Reports to the Trustee; Certificate Account
Statement. Not later than 15 days after each Distribution Date, the Servicer shall forward a statement, certified by a
Servicing Officer, to the Trustee setting forth the status of the Certificate Account as of the close of business on such
Distribution Date and showing, for the period covered by such statement, the aggregate of deposits into and withdrawals from the
Certificate Account for each category of deposit specified in Section 3.04 and each category of withdrawal specified in Section
3.05, and stating that all distributions required by this Agreement have been made (or if any required distribution has not been
made, specifying the nature and amount thereof).  The Trustee shall make available such statements to any Certificateholder
upon request at the expense of the Servicer. Such statement shall also, to the extent available, include information regarding
delinquencies on the Mortgage Loans, indicating the number and aggregate Principal Balance of Mortgage Loans which are one, two,
three or more months delinquent, the number and aggregate Principal Balance of Mortgage Loans with respect to which foreclosure
proceedings have been initiated and the book value of any Mortgaged Property acquired by the Trust through foreclosure, deed in
lieu of foreclosure or other exercise of the Trust’s security interest in the Mortgaged Property. The filing of such
statement and reports with the Trustee is for informational purposes only, and, except for making available such statements and
reports to any Certificateholder, upon request, the Trustee shall have no responsibility with respect thereto.


Section 3.13.        Annual Statement as to Compliance. The
Servicer shall deliver to the Trustee, on or before April 30 of each year, beginning with the first April 30 succeeding the Cut-Off
Date by at least six months, an Officer’s Certificate stating as to the signer thereof, that (i) a review of the activities
of the Servicer during the preceding calendar year and performance under this Agreement has been made under such officer’s
supervision, and (ii) to the best of such officer’s knowledge, based on such review, the Servicer has fulfilled all its
obligations under this Agreement throughout such year, or, if there has been a default in the fulfillment of any such obligation,
specifying each such default known to such officer and the nature and status thereof. Copies of such statement shall be provided by
the Servicer to Certificateholders upon request or by the Trustee (solely to the extent that such copies are available to the
Trustee) at the expense of the Servicer, should the Servicer fail to so provide such copies.


Section 3.14.        Access to Certain Documentation and Information
Regarding the Mortgage Loans. In the event that the Certificates are legal for investment by federally-insured savings
associations, the Servicer shall provide to the OTS, the FDIC and the supervisory agents and examiners of the OTS and the FDIC
access to the documentation regarding the related Mortgage Loans required by applicable regulations of the OTS or the FDIC, as
applicable, and shall in any event provide such access to the documentation regarding such Mortgage Loans to the Trustee and its
representatives, such access being afforded without charge, but only upon reasonable request and during normal business hours at
the offices of the Servicer designated by it.


Section 3.15.        Annual Independent Public Accountants’ Servicing
Report. On or before April 30 of each year, beginning with the first April 30 succeeding the Cut-Off Date by at least
six months, the Servicer, at its expense, shall furnish to the Trustee a copy of a report delivered to the Servicer by a firm of
independent public accountants (who may also render other services to the Servicer or any affiliate thereof) to the effect that, on
the basis of an examination conducted by such firm in accordance with standards established by the American Institute of Certified
Public Accountants, the Servicer has complied with certain minimum residential mortgage loan servicing standards in its role as
Servicer with respect to the servicing of residential mortgage loans (including the Mortgage Loans) during the most recently
completed fiscal year.  In rendering its report such firm may rely, (a) as to matters relating to the Certificates, upon a
statistical sampling of series of mortgage-backed certificates which may include the Certificates and (b) as to matters relating to
the direct servicing of residential mortgage loans by subservicers, upon comparable reports of firms of independent certified
public accountants rendered on the basis of examinations conducted in accordance with the same standards (rendered within one year
of such report) with respect to those subservicers.


Section 3.16.        Yield Maintenance Account.   On or prior to the Closing Date, the Trustee shall cause to be established and maintained the Yield
Maintenance Account, into which amounts received by the Trustee from the Cap Counterparty pursuant to the Yield Maintenance
Agreements shall be deposited for the benefit of the Class 1-CB-3 and Class 2-A-3 Certificates.  On each Distribution
Date, the Trustee shall withdraw from the Yield Maintenance Account, to the extent funds are available therein and in accordance
with the statement received from the Servicer pursuant to Section 4.02(b), the Yield Maintenance Payment Amounts for the Class
1-CB-3 and Class 2-A-3 Certificates for such Distribution Date and deposit such amounts in the Certificate Account for payment
to such Classes of Certificates pursuant to Section 4.04(a).


Amounts on deposit in the Yield Maintenance Account shall not be invested and shall not be
held in an interest-bearing account.


The Trustee shall withdraw from the Yield Maintenance Account and pay to itself any
amounts remaining in the Yield Maintenance Account after the later of the Final Yield Maintenance Payment Date for the Class 1-CB-3
Certificates and for the Class 2-A-3 Certificates.


To the extent that it constitutes a “reserve fund” for purposes of the REMIC
Provisions, the Yield Maintenance Account established hereunder shall be an “outside reserve fund” as defined in
Treasury Regulation 1.860G-2(h), and in that regard (i) such fund shall be an outside reserve fund and not an asset of any REMIC,
(ii) such fund shall be owned for federal tax purposes by the Trustee, and the Trustee shall report all amounts of income,
deduction, gain or loss accruing therefrom, and (iii) amounts transferred by the REMIC to the fund shall be treated as distributed
by the REMIC to the Trustee.  The Servicer shall deliver to the Trustee an annual statement showing (x) the amounts received
by the Trustee, in its capacity as owner of the Yield Maintenance Account for income tax purposes, as payments on the Yield
Maintenance Agreements, and (y) the amounts paid to Certificateholders from such amounts received. The Servicer shall indemnify the
Trustee to the extent that any tax liability of the Trustee, in its capacity as owner of the Yield Maintenance Account for income
tax purposes (including the amount of any tax liability resulting from the indemnity payment), exceeds the net funds (that is, the
excess of the amount in clause (x) above over the amount in clause (y) above), if any, received by the Trustee from such
account.


Section 3.17.        
[Reserved.]


Section 3.18.        [Reserved.] 


Section 3.19.        Determination of LIBOR by
Servicer.  


(a)        With respect to the
first Distribution Date, LIBOR shall be 2.850% for the Class 1-CB-3-M Regular Interest and Class 1-CB-4 Certificates, and shall be
2.954% for the Class 2-A-3-M Regular Interest and Class 2-A-4 Certificates. With respect to each Distribution Date thereafter, the
Servicer will determine LIBOR on the related LIBOR Determination Date on the basis of the
“Interest Settlement Rate” for United States dollar deposits of one-month maturity set by the British Bankers’
Association (the “BBA”) as of 11:00 a.m. (London time) on such LIBOR Determination Date as found on any of the
Moneyline Telerate Service (formerly the Dow Jones Markets) page 3750, the Reuters Monitor Money Rates Service page
“LIBOR01” or the Bloomberg L.P. page “BBAM” (each such page, or such other page as may replace any of the
foregoing on such service or such other service as may be nominated by the BBA as the information vendor for the purpose of
displaying the BBA’s Interest Settlement Rates for deposits in United States dollars, each, a “Designated Telerate
Page”).


(b)        If on any LIBOR Determination Date,
such Interest Settlement Rates are not available from any Designated Telerate Page, LIBOR for the related accrual period will be
the most recently published Interest Settlement Rate.  In the event that the BBA no longer sets an Interest Settlement Rate,
the Servicer shall calculate LIBOR for the immediately following accrual period as follows:  the Servicer will determine LIBOR
by reference to the quotations offered by the principal London office of each of the designated Reference Banks meeting the
criteria set forth below for making one-month United States dollar deposits in leading banks in the London Interbank market, as of
11:00 a.m. (London time) on the LIBOR Determination Date.  Under this method LIBOR will be established by the Servicer on each
LIBOR Determination Date as follows:


(i)         If on any LIBOR Determination
Date two or more Reference Banks provide offered quotations, LIBOR for the next interest accrual period shall be the arithmetic
mean of the offered quotations, carrying the result (expressed as a percentage) out to six decimal places, and rounding to five
decimal places.


(ii)        If on any LIBOR Determination Date only one
or none of the Reference Banks provides offered quotations, LIBOR for the next interest accrual period shall be the greater
of:


·        LIBOR as determined
on the previous LIBOR Determination Date (or, in the case of the first LIBOR Determination Date and the Class
1-CB-3-M Regular Interest and Class 1-CB-4 Certificates, 2.850%; and in the case of the first
LIBOR Determination Date and the Class 2-A-3-M Regular Interest and Class 2-A-4 Certificates, 2.954%) or


·        the Reserve
Interest Rate.


The “Reserve Interest Rate” shall be the rate per annum that the Servicer
determines to be either:


·        the arithmetic
mean, (expressed as a percentage) carried out to six decimal places, and rounded to five decimal places, of the one-month United
States dollar lending rates that New York City banks selected by the Servicer are quoting, on the relevant LIBOR Determination
Date, to the principal London offices of at least two of the Reference Banks to which the quotations are, in the opinion of the
Servicer, being so made, or


·        if the Servicer
cannot determine the arithmetic mean, the lowest one-month United States dollar lending rate which New York City banks selected by
the Servicer are quoting on the LIBOR Determination Date to leading European banks.


(iii)       If on any LIBOR Determination Date the Servicer
is required but is unable to determine the Reserve Interest Rate in the manner provided in paragraph (ii) above, LIBOR for the next
interest accrual period shall be LIBOR as determined on the preceding LIBOR Determination Date (or, in the case of the first LIBOR
Determination Date and the Class 1-CB-3-M Regular Interest and Class 1-CB-4 Certificates, 2.850%; and in the case of the first LIBOR Determination Date and the Class 2-A-3-M Regular
Interest and Class 2-A-4 Certificates, 2.954%).


Each “Reference Bank” (i) will be a leading bank engaged in transactions in
Eurodollar deposits in the international Eurocurrency market, (ii) will not control, be controlled by, or be under common control
with, the Servicer and (iii) will have an established place of business in London.  If any Reference Bank should be unwilling
or unable to act as such or if the Servicer should terminate the designation of any such reference bank, the Servicer will promptly
designate another leading bank meeting the criteria specified above.  If on any such LIBOR Determination Date, the Servicer
calculates LIBOR on the basis of the provisions of this Section 3.19(b), the Servicer shall designate the Reference
Banks. 


(c)        The establishment of LIBOR on each LIBOR
Determination Date by the Servicer for the related accrual period will, in the absence of manifest error, be final and
binding.


Section 3.20.        
[Reserved.]


Section 3.21.        
[Reserved.]


ARTICLE IV




Payments to Certificateholders; Payment of Expenses


Section 4.01.        Distributions to Holders of REMIC I Regular Interests
and Class R-1 Residual Interest.  On each Distribution Date, the Trustee (or any duly appointed paying agent) (i)
shall be deemed to have distributed from the Certificate Account the REMIC I Distribution Amount to the Holders of the REMIC I
Regular Interests and to have deposited such amounts for their benefit into the Certificate Account and (ii) from the Certificate
Account shall distribute to the Class R Certificateholders, in accordance with the written statement received from the Servicer
pursuant to Section 4.02(b), the sum of (a) the Excess Liquidation Proceeds and (b) the amounts to be distributed to the Holders of
the Class R-1 Residual Interest pursuant to the definition of “REMIC I Distribution Amount” for such Distribution
Date.  Amounts distributed pursuant to clause (ii) above shall be distributed by wire transfer in immediately available funds
for the account of each Class R Certificateholder, or by any other means of payment acceptable to each Class R Certificateholder of
record on the immediately preceding Record Date (other than as provided in Section 9.01 respecting the final distribution), as
specified by each such Certificateholder and at the address of such Holder appearing in the Certificate Register. Notwithstanding
any other provision of this Agreement, no actual distributions pursuant to clause (ii) of this Section 4.01 shall be made on
account of the deemed distributions described in this paragraph except in the event of a liquidation of REMIC II and not REMIC
I.


Section 4.02.        Advances by the Servicer; Distribution Reports to the
Trustee.


(a)        To the extent described below, the Servicer
is obligated to advance its own funds to the Certificate Account to cover any shortfall between (i) payments scheduled to be
received in respect of Mortgage Loans and (ii) the amounts actually deposited in the Certificate Account on account of such
payments.  The Servicer’s obligation to make any advance or advances described in this Section 4.02 is effective only to
the extent that such advance is, in the good faith judgment of the Servicer made on or before the second Business Day prior to each
Distribution Date, reimbursable from Insurance Proceeds or Liquidation Proceeds of the related Mortgage Loans or recoverable as
late Monthly Payments with respect to the related Mortgage Loans or otherwise.


Prior to the close of business on the second Business Day prior to each Distribution Date,
the Servicer shall determine whether or not it will make a Monthly P&I Advance on the Business Day prior to such Distribution
Date and shall furnish a written statement to the Trustee, the Paying Agent, if any, and to any Certificateholder requesting the
same, setting forth the aggregate amount to be advanced on account of principal and interest in respect of the Mortgage Loans,
stated separately.


In the event that the Servicer shall be required to make a Monthly P&I Advance, it
shall on the Business Day prior to the related Distribution Date either (i) deposit in the Certificate Account an amount equal to
such Monthly P&I Advance, (ii) make an appropriate entry in the records of the Certificate Account that funds in such account
being held for future distribution or withdrawal have been, as permitted by this Section 4.02, used by the Servicer to make such
Monthly P&I Advance or (iii) make advances in the form of any combination of (i) and (ii) aggregating the amount of such
Monthly P&I Advance.  Any funds being held for future distribution and so used shall be replaced by the Servicer by
deposit in the Certificate Account on the Business Day immediately preceding any future Distribution Date to the extent that funds
in the Certificate Account on such Distribution Date with respect to the Mortgage Loans shall be less than payments required to be
made hereunder on such date with respect to the Mortgage Loans.  The Servicer is entitled to receive from the Custodial
Accounts for P&I monies received on particular Mortgage Loans as late payments of principal and interest or as Liquidation or
Insurance Proceeds and respecting which the Servicer has made an unreimbursed advance of principal and interest.  The Servicer
is also entitled to receive other amounts from the related Custodial Accounts for P&I to reimburse itself for prior
Nonrecoverable Advances respecting Mortgage Loans.  The Servicer shall deposit these amounts in the Investment Account prior
to withdrawal pursuant to Section 3.05.


In accordance with Section 3.05, Monthly P&I Advances are reimbursable to the Servicer
from cash in the Investment Account or the Certificate Account to the extent that the Servicer shall determine that any such
advances previously made are Nonrecoverable Advances pursuant to Section 4.03.


(b)        Prior to noon New York City time two
Business Days prior to each Distribution Date, the Servicer shall provide (x) the Trustee and (y) the Company with a statement in
writing of (1) the amount, as applicable, of (i) interest, (ii) the interest portion, if any, of Realized Losses, (iii)
Uncompensated Interest Shortfall, (iv) scheduled principal, (v) Principal Prepayments, (vi) Liquidation Principal, (vii) Subsequent
Recoveries, (viii) the principal portion of Realized Losses (after giving effect to any reduction thereof by application of any
Cumulative Carry-Forward Subsequent Recoveries Amount), (ix) the Residual Distribution Amount and (x) the Excess Liquidation
Proceeds to be distributed or allocated, as applicable, to each Class of Certificates on such Distribution Date (such amounts to be
determined in accordance with the definitions of “REMIC I Distribution Amount” and “REMIC II Distribution
Amount,” Section 4.01 and Section 4.04 hereof and other related definitions set forth in Article I hereof); (2) the
applicable Class Principal Balance after giving effect to such distributions and allocations; (3) the Cumulative Carry-Forward
Subsequent Recoveries Amount for such Distribution Date and each Loan Group; (4) the amount of any Special Primary Insurance
Premium payable on such Distribution Date; and (5) the Yield Maintenance Payment Amount for each of the Class 1-CB-3 and
Class 2-A-3 Certificates for such Distribution Date.


Section 4.03.        Nonrecoverable Advances. Any advance
previously made by the Servicer that the Servicer shall determine in its good faith judgment not to be ultimately recoverable from
Insurance Proceeds or Liquidation Proceeds or otherwise with respect to such Mortgage Loan or recoverable as late Monthly Payments
with respect to such Mortgage Loan shall be a Nonrecoverable Advance.  The determination by the Servicer that it has made a
Nonrecoverable Advance or that any advance would constitute a Nonrecoverable Advance, shall be evidenced by an Officer’s
Certificate of the Servicer delivered to the Trustee on the Determination Date and detailing the reasons for such
determination.  Notwithstanding any other provision of this Agreement, any insurance policy relating to the Mortgage Loans, or
any other agreement relating to the Mortgage Loans to which the Company or the Servicer is a party, (a) the Servicer shall not be
obligated to, and shall not, make any advance that, after reasonable inquiry and in its sole discretion, the Servicer shall
determine would be a Nonrecoverable Advance and (b) the Servicer shall be entitled to reimbursement for any advance as provided in
Section 3.05(a)(i), (ii) and (iv) of this Agreement.


Section 4.04.        Distributions to Certificateholders; Payment of Special
Primary Insurance Premiums. 


(a)        On each Distribution Date, the Trustee (or
any duly appointed paying agent) shall (i) subject to Section 3.05(a)(viii), withdraw from the Certificate Account any Special
Primary Insurance Premium payable on such Distribution Date and pay such amount to the insurer under the applicable Special Primary
Insurance Policy and (ii) withdraw from the Certificate Account  the REMIC II Available Distribution Amount for such
Distribution Date and distribute, from the amount so withdrawn, to the extent of the REMIC II Available Distribution Amount, the
REMIC II Distribution Amount to the Holders of the REMIC II Regular Interests and the Class R-2 Residual Interest.


Furthermore, on each Distribution Date from and including May 2005 to and including the
Final Yield Maintenance Payment Date for the Class 1-CB-3 Certificates, the Trustee shall withdraw from the Certificate Account and
distribute to the Holders of such Class the Yield Maintenance Payment Amount for such Class; and on each Distribution Date from and
including May 2005 to and including the Final Yield Maintenance Payment Date for the Class 2-A-3 Certificates, the Trustee shall
withdraw from the Certificate Account and distribute to the Holders of such Class the Yield Maintenance Payment Amount for such
Class.


The net distributions to the Certificates pursuant to this Section 4.04(a) shall be made
in accordance with the written statement received from the Servicer pursuant to Section 4.02(b) and without any responsibility to
recalculate, verify or confirm the information in such statement.  Any Special Primary Insurance Premiums distributed pursuant
to clause (i) above shall be distributed by any method specified in the respective Special Primary Insurance Policy as directed by
the related insurer to the Servicer.  Amounts distributed to the Certificateholders pursuant to clause (ii) above shall be
distributed by wire transfer in immediately available funds for the account of, or by check mailed to, each such Certificateholder
of record on the immediately preceding Record Date (other than as provided in Section 9.01 respecting the final distribution), as
specified by each such Certificateholder and at the address of such Holder appearing in the Certificate Register. 


(b)        All reductions in the Certificate Principal
Balance of a Certificate effected by distributions of principal and all allocations of Realized Losses made on any Distribution
Date shall be binding upon all Holders of such Certificate and of any Certificate issued upon the registration of transfer or
exchange therefor or in lieu thereof, whether or not such distribution is noted on such Certificate. The final distribution of
principal of each Certificate (and the final distribution upon the Class R Certificates upon (i) the termination of REMIC I and
REMIC II and (ii) the payment, or making provision for payment, of all liabilities of the Trust) shall be payable in the manner
provided above only upon presentation and surrender thereof on or after the Distribution Date therefor at the office or agency of
the Certificate Registrar specified in the notice delivered pursuant to Section 4.04(c)(ii) and Section 9.01(b).


(c)        Whenever, on the basis of Curtailments,
Payoffs and Monthly Payments on the Mortgage Loans and Insurance Proceeds and Liquidation Proceeds received and expected to be
received during the Payoff Period, the Servicer has notified the Trustee that it believes that the entire remaining unpaid Class
Principal Balance of any Class of Certificates will become distributable on the next Distribution Date, the Trustee shall, no later
than the 18th day of the month of such Distribution Date, mail or cause to be mailed to each Person in whose name a Certificate to
be so retired is registered at the close of business on the Record Date and to the Rating Agencies a notice to the effect
that:


(i)                  it is expected
that funds sufficient to make such final distribution will be available in the Certificate Account on such Distribution Date,
and


(ii)                if such funds are available,
(A) such final distribution will be payable on such Distribution Date, but only upon presentation and surrender of such Certificate
at the office or agency of the Certificate Registrar maintained for such purpose (the address of which shall be set forth in such
notice), and (B) no interest shall accrue on such Certificate after such Distribution Date.


Section 4.05.        Statements to Certificateholders. With each
distribution from the Certificate Account on a Distribution Date, the Trustee shall send to each Rating Agency and shall make
available to each Certificateholder the statement required by Section 4.02(b). The Trustee may make available such statement and
certain other information, including, without limitation, information required to be provided by the Trustee pursuant to Sections
3.12 and 3.13, to Certificateholders through the Trustee’s Corporate Trust home page on the world wide web. Such web page is
currently located at “www.etrustee.net”. The location of such web page and the procedures used therein are subject to
change from time to time at the Trustee’s discretion.


Upon request by any Certificateholder or Rating Agency, or the Trustee, the Servicer shall
forward to such Certificateholder or Rating Agency, the Trustee and the Company an additional report which sets forth with respect
to the Mortgage Loans:


(a)        The number and aggregate Principal Balance
of the Mortgage Loans delinquent one, two and three months or more, in each case, by Loan Group;


(b)        The (i) number and aggregate Principal
Balance of Mortgage Loans with respect to which foreclosure proceedings have been initiated, and (ii) the number and aggregate book
value of Mortgaged Properties acquired through foreclosure, deed in lieu of foreclosure or other exercise of rights respecting the
Trust’s security interest in the Mortgage Loans, in each case, by Loan Group; and


(c)        The cumulative amount of Realized Losses
incurred in respect of each Loan Group allocated to the related Certificates since the Cut-Off Date.


Upon request by any Certificateholder, the Servicer, as soon as reasonably practicable,
shall provide the requesting Certificateholder with such information as is necessary and appropriate, in the Servicer’s sole
discretion, for purposes of satisfying applicable reporting requirements under Rule 144A of the Securities Act.


The Company may make available any reports, statements or other information to
Certificateholders through the Company’s home page on the world wide web. As of the Closing Date, such web page is located at
“www.wamumsc.com” and information is available by clicking on “Investor Information.”


ARTICLE V




The Certificates


Section 5.01.        The Certificates.


(a)        The Certificates shall be substantially in
the forms set forth in Exhibit A and B with the additional insertion from Exhibit H attached hereto, and shall be executed by the
Trustee on behalf of the Trust, authenticated by the Trustee (or any duly appointed Authenticating Agent) and delivered (i) upon
and pursuant to the order of the Company and (ii) upon receipt by the Trustee of the documents specified in Section 2.01. The
Certificates shall be issuable in Authorized Denominations. Certificates shall be executed by manual or facsimile signature on
behalf of the Trust by authorized officers of the Trustee. Certificates bearing the manual or facsimile signatures of individuals
who were at the time of execution the proper officers of the Trustee shall bind the Trust, notwithstanding that such individuals or
any of them have ceased to hold such offices prior to the authentication and delivery of such Certificates or did not hold such
offices at the date of such Certificates. No Certificate shall be entitled to any benefit under this Agreement, or be valid for any
purpose, unless there appears on such Certificate a certificate of authentication substantially in the form provided for herein
executed by the Trustee or any Authenticating Agent by manual signature, and such certificate upon any Certificate shall be
conclusive evidence, and the only evidence, that such Certificate has been duly authenticated and delivered hereunder. All
Certificates shall be dated the date of their authentication.


(b)        The following definitions apply for purposes
of this Section 5.01: “Disqualified Organization” means any Person which is not a Permitted Transferee, but does
not include any “Pass-Through Entity” which owns or holds a Residual Certificate and of which a Disqualified
Organization, directly or indirectly, may be a stockholder, partner or beneficiary; “Pass-Through Entity” means any
regulated investment company, real estate investment trust, common trust fund, partnership, trust or estate, and any organization
to which Section 1381 of the Code applies; “Ownership Interest” means, with respect to any Residual Certificate,
any ownership or security interest in such Residual Certificate, including any interest in a Residual Certificate as the Holder
thereof and any other interest therein whether direct or indirect, legal or beneficial, as owner or as pledgee;
“Transfer” means any direct or indirect transfer or sale of, or directly or indirectly transferring or selling
any Ownership Interest in a Residual Certificate; and “Transferee” means any Person who is acquiring by Transfer
any Ownership Interest in a Residual Certificate.


(c)        Restrictions on Transfers of the Residual
Certificates to Disqualified Organizations are set forth in this Section 5.01(c).


(i)                  Each Person who
has or who acquires any Ownership Interest in a Residual Certificate shall be deemed by the acceptance or acquisition of such
Ownership Interest to have agreed to be bound by the following provisions and to have irrevocably authorized the Trustee or its
designee under clause (iii)(A) below to deliver payments to a Person other than such Person and to negotiate the terms of any
mandatory sale under clause (iii)(B) below and to execute all instruments of transfer and to do all other things necessary in
connection with any such sale. The rights of each Person acquiring any Ownership Interest in a Residual Certificate are expressly
subject to the following provisions:


(A)       Each Person holding or acquiring any Ownership
Interest in a Residual Certificate shall be a Permitted Transferee and shall promptly notify the Trustee of any change or impending
change in its status as a Permitted Transferee.


(B)       In connection with any proposed Transfer of any
Ownership Interest in a Residual Certificate to a U.S. Person, the Trustee shall require delivery to it, and shall not register the
Transfer of any Residual Certificate until its receipt of (1) an affidavit and agreement (a “Transferee Affidavit and
Agreement”) attached hereto as Exhibit J from the proposed Transferee, in form and substance satisfactory to the Company,
representing and warranting, among other things, that it is not a Non-U.S. Person, that such transferee is a Permitted Transferee,
that it is not acquiring its Ownership Interest in the Residual Certificate that is the subject of the proposed Transfer as a
nominee, trustee or agent for any Person who is not a Permitted Transferee, that for so long as it retains its Ownership Interest
in a Residual Certificate, it will endeavor to remain a Permitted Transferee, and that it has reviewed the provisions of this
Section 5.01(c) and agrees to be bound by them, and (2) a certificate, attached hereto as Exhibit I, from the Holder wishing to
transfer the Residual Certificate, in form and substance satisfactory to the Company, representing and warranting, among other
things, that no purpose of the proposed Transfer is to allow such Holder to impede the assessment or collection of tax.


(C)       Notwithstanding the delivery of a Transferee
Affidavit and Agreement by a proposed Transferee under clause (B) above, if the Trustee has actual knowledge that the proposed
Transferee is not a Permitted Transferee, no Transfer of an Ownership Interest in a Residual Certificate to such proposed
Transferee shall be effected.


(D)       Each Person holding or acquiring any Ownership
Interest in a Residual Certificate agrees by holding or acquiring such Ownership Interest (i) to require a Transferee Affidavit and
Agreement from any other Person to whom such Person attempts to transfer its Ownership Interest and to provide a certificate to the
Trustee in the form attached hereto as Exhibit J; (ii) to obtain the express written consent of the Company prior to any transfer
of such Ownership Interest, which consent may be withheld in the Company’s sole discretion; and (iii) to provide a
certificate to the Trustee in the form attached hereto as Exhibit I.


(ii)                The Trustee shall register
the Transfer of any Residual Certificate only if it shall have received the Transferee Affidavit and Agreement, a certificate of
the Holder requesting such transfer in the form attached hereto as Exhibit J and all of such other documents as shall have been
reasonably required by the Trustee as a condition to such registration.


(iii)              
(A)       If any “disqualified organization” (as defined in Section 860E(e)(5) of the
Code) shall become a holder of a Residual Certificate, then the last preceding Permitted Transferee shall be restored, to the
extent permitted by law, to all rights and obligations as Holder thereof retroactive to the date of registration of such Transfer
of such Residual Certificate. If any Non-U.S. Person shall become a holder of a Residual Certificate, then the last preceding
holder which is a U.S. Person shall be restored, to the extent permitted by law, to all rights and obligations as Holder thereof
retroactive to the date of registration of the Transfer to such Non-U.S. Person of such Residual Certificate. If a transfer of a
Residual Certificate is disregarded pursuant to the provisions of Treasury Regulations Section 1.860E-1 or Section 1.860G-3, then
the last preceding Permitted Transferee shall be restored, to the extent permitted by law, to all rights and obligations as Holder
thereof retroactive to the date of registration of such Transfer of such Residual Certificate. Neither the Trust nor the Trustee
shall be under any liability to any Person for any registration of Transfer of a Residual Certificate that is in fact not permitted
by this Section 5.01(c) or for making any payments due on such Certificate to the holder thereof or for taking any other action
with respect to such holder under the provisions of this Agreement.


(B)       If any purported Transferee shall become a Holder
of a Residual Certificate in violation of the restrictions in this Section 5.01(c) and to the extent that the retroactive
restoration of the rights of the Holder of such Residual Certificate as described in clause (iii)(A) above shall be invalid,
illegal or unenforceable, then the Company shall have the right, without notice to the Holder or any prior Holder of such Residual
Certificate, to sell such Residual Certificate to a purchaser selected by the Company on such terms as the Company may choose. Such
purported Transferee shall promptly endorse and deliver each Residual Certificate in accordance with the instructions of the
Company. Such purchaser may be the Company itself or any affiliate of the Company. The proceeds of such sale, net of the
commissions (which may include commissions payable to the Company or its affiliates), expenses and taxes due, if any, shall be
remitted by the Company to such purported Transferee. The terms and conditions of any sale under this clause (iii)(B) shall be
determined in the sole discretion of the Company, and the Company shall not be liable to any Person having an Ownership Interest in
a Residual Certificate as a result of its exercise of such discretion.


(iv)              The Servicer, on behalf of the Trustee,
shall make available, upon written request from the Trustee, all information necessary to compute any tax imposed (A) as a result
of the Transfer of an Ownership Interest in a Residual Certificate to any Person who is not a Permitted Transferee, including the
information regarding “excess inclusions” of such Residual Certificates required to be provided to the Internal Revenue
Service and certain Persons as described in Treasury Regulation Section 1.860D-1(b)(5), and (B) as a result of any regulated
investment company, real estate investment trust, common trust fund, partnership, trust, estate or organizations described in
Section 1381 of the Code having as among its record holders at any time any Person who is not a Permitted Transferee. Reasonable
compensation for providing such information may be required by the Servicer from such Person.


(v)                The provisions of this
Section 5.01 set forth prior to this Section (v) may be modified, added to or eliminated by the Company and the Trustee, provided
that there shall have been delivered to the Trustee the following:


(A)       written notification from each of the Rating
Agencies to the effect that the modification, addition to or elimination of such provisions will not cause such Rating Agency to
downgrade its then-current Ratings of the Certificates; and


(B)       an Opinion of Counsel, in form and substance
satisfactory to the Company (as evidenced by a certificate of the Company), to the effect that such modification, addition to or
absence of such provisions will not cause REMIC I and REMIC II to cease to qualify as a REMIC and will not create a risk that (1)
REMIC I and REMIC II may be subject to an entity-level tax caused by the Transfer of any Residual Certificate to a Person which is
not a Permitted Transferee or (2) a Certificateholder or another Person will be subject to a REMIC-related tax caused by the
Transfer of a Residual Certificate to a Person which is not a Permitted Transferee.


(vi)              The following legend shall appear on all
Residual Certificates:


ANY RESALE, TRANSFER OR OTHER DISPOSITION OF THIS CERTIFICATE MAY BE MADE ONLY IF THE
PROPOSED TRANSFEREE PROVIDES A TRANSFER AFFIDAVIT TO THE COMPANY AND THE TRUSTEE THAT (1) SUCH TRANSFEREE IS NOT EITHER (A) THE
UNITED STATES, ANY STATE OR POLITICAL SUBDIVISION THEREOF, ANY FOREIGN GOVERNMENT, ANY INTERNATIONAL ORGANIZATION, OR ANY AGENCY OR
INSTRUMENTALITY OF ANY OF THE FOREGOING, (B) ANY ORGANIZATION (OTHER THAN A COOPERATIVE DESCRIBED IN SECTION 521 OF THE CODE) WHICH
IS EXEMPT FROM THE TAX IMPOSED BY CHAPTER 1 OF THE CODE UNLESS SUCH ORGANIZATION IS SUBJECT TO THE TAX IMPOSED BY SECTION 511 OF
THE CODE, (C) ANY ORGANIZATION DESCRIBED IN SECTION 1381(a)(2)(C) OF THE CODE (ANY SUCH PERSON DESCRIBED IN THE FOREGOING CLAUSES
(A), (B), OR (C) BEING HEREINAFTER REFERRED TO AS A “DISQUALIFIED ORGANIZATION”), OR (D) AN AGENT OF A DISQUALIFIED
ORGANIZATION AND (2) NO PURPOSE OF SUCH TRANSFER IS TO ENABLE THE TRANSFEROR TO IMPEDE THE ASSESSMENT OR COLLECTION OF TAX. SUCH
AFFIDAVIT SHALL INCLUDE CERTAIN REPRESENTATIONS AS TO THE FINANCIAL CONDITION OF THE PROPOSED TRANSFEREE. NOTWITHSTANDING THE
REGISTRATION IN THE CERTIFICATE REGISTER OF ANY TRANSFER, SALE OR OTHER DISPOSITION OF THIS CLASS R CERTIFICATE TO A DISQUALIFIED
ORGANIZATION OR AN AGENT OF A DISQUALIFIED ORGANIZATION, SUCH REGISTRATION SHALL BE DEEMED TO BE OF NO LEGAL FORCE OR EFFECT
WHATSOEVER AND SUCH PERSON SHALL NOT BE DEEMED TO BE A CERTIFICATEHOLDER FOR ANY PURPOSE HEREUNDER, INCLUDING, BUT NOT LIMITED TO,
THE RECEIPT OF DISTRIBUTIONS ON THIS CERTIFICATE. EACH HOLDER OF THE CLASS R CERTIFICATE BY ACCEPTANCE OF THIS CERTIFICATE SHALL BE
DEEMED TO HAVE CONSENTED TO THE PROVISIONS OF THIS PARAGRAPH.


(vii)             The Tax Matters Person for each of REMIC I and
REMIC II, while not a Disqualified Organization, shall be the tax matters person for the related REMIC within the meaning of
Section 6231(a)(7) of the Code and Treasury Regulation Section 1.860F-4(d).


(d)        In the case of any Junior Subordinate
Certificate presented for registration in the name of any Person, the Trustee shall require (i) an officer’s certificate
substantially in the form of Exhibit N attached hereto acceptable to and in form and substance satisfactory to the Trustee and the
Company, which officer’s certificate shall not be an expense of the Trust, the Trustee, the Delaware Trustee, the Servicer or
the Company, and (ii) only if such officer’s certificate indicates that a Benefit Plan Opinion is delivered in connection
therewith, a Benefit Plan Opinion.


In the case of any Residual Certificate presented for registration in the name of any
Person, the Trustee shall require (i) a Transferee Affidavit and Agreement which includes the representation set forth in paragraph
19 of the form attached hereto as Exhibit J and (ii) only if the representation set forth in such paragraph 19 indicates that a
Benefit Plan Opinion is delivered in connection therewith, a Benefit Plan Opinion.


(e)        No transfer, sale, pledge or other
disposition of a Junior Subordinate Certificate shall be made unless such transfer, sale, pledge or other disposition is made in
accordance with this Section 5.01(e) or Section 5.01(f).  Each Person who, at any time, acquires any ownership interest in any
Junior Subordinate Certificate shall be deemed by the acceptance or acquisition of such ownership interest to have agreed to be
bound by the following provisions of this Section 5.01(e) and Section 5.01(f), as applicable. No transfer of a Junior Subordinate
Certificate shall be deemed to be made in accordance with this Section 5.01(e) unless such transfer is made pursuant to an
effective registration statement under the Securities Act or unless the Trustee is provided with the certificates and an Opinion of
Counsel, if required, on which the Trustee may conclusively rely, to the effect that such transfer is exempt from the registration
requirements under the Securities Act, as follows:  In the event that a transfer is to be made in reliance upon an exemption
from the Securities Act, the Trustee shall require, in order to assure compliance with the Securities Act, that the
Certificateholder desiring to effect such transfer certify to the Trustee in writing, in substantially the form attached hereto as
Exhibit F, the facts surrounding the transfer, with such modifications to such Exhibit F as may be appropriate to reflect the
actual facts of the proposed transfer, and that the Certificateholder’s proposed transferee certify to the Trustee in
writing, in substantially the form attached hereto as Exhibit G, the facts surrounding the transfer, with such modifications to
such Exhibit G as may be appropriate to reflect the actual facts of the proposed transfer. If such certificate of the proposed
transferee does not contain substantially the substance of Exhibit G, the Trustee shall require an Opinion of Counsel that such
transfer may be made without registration, which Opinion of Counsel shall not be obtained at the expense of the Trustee, the
Delaware Trustee, the Trust, the Servicer or the Company. Such Opinion of Counsel shall allow for the forwarding, and the Trustee
shall forward, a copy thereof to the Rating Agencies. Notwithstanding the foregoing, any Junior Subordinate Certificate may be
transferred, sold, pledged or otherwise disposed of in accordance with the requirements set forth in Section 5.01(f).


(f)         To effectuate a Certificate transfer
of a Junior Subordinate Certificate in accordance with this Section 5.01(f), the proposed transferee of such Certificate must
provide the Trustee and the Company with an investment letter substantially in the form of Exhibit L attached hereto, which
investment letter shall not be an expense of the Trust, the Trustee, the Delaware Trustee or the Company, and which investment
letter states that, among other things, such transferee (i) is a “qualified institutional buyer” as defined under Rule
144A, acting for its own account or the accounts of other “qualified institutional buyers” as defined under Rule 144A,
and (ii) is aware that the proposed transferor intends to rely on the exemption from registration requirements under the Securities
Act provided by Rule 144A. Notwithstanding the foregoing, the proposed transferee of such Certificate shall not be required to
provide the Trustee or the Company with Annex 1 or Annex 2 to the form of Exhibit L attached hereto if the Company so consents
prior to each such transfer. Such transfers shall be deemed to have complied with the requirements of this Section 5.01(f). The
Holder of a Certificate desiring to effect such transfer does hereby agree to indemnify the Trust, the Trustee, the Delaware
Trustee, the Servicer, the Company, and the Certificate Registrar against any liability that may result if transfer is not made in
accordance with this Agreement.


(g)       
(1)        In the case of any ERISA Restricted Certificate presented for registration in the
name of any Person, the prospective transferee shall be required to provide the Trustee and the Company (A) an officer’s
certificate substantially in the form of Exhibit O attached hereto acceptable to and in form and substance satisfactory to the
Trustee and the Company, which officer’s certificate shall not be an expense of the Trust, the Servicer, the Trustee, the
Delaware Trustee, the Servicer or the Company, and (B) only if such officer’s certificate indicates that a Benefit Plan
Opinion is delivered in connection therewith, a Benefit Plan Opinion.


(2)        Notwithstanding the foregoing, a
certification (and, if applicable, a Benefit Plan Opinion) as described in Section 5.01(g)(1) above will not be required with
respect to the transfer of any ERISA Restricted Certificate to a Clearing Agency, or for any subsequent transfer of any interest in
a ERISA Restricted Certificate for so long as such Certificate is a Book-Entry Certificate (each such ERISA Restricted Certificate,
a “Book-Entry ERISA Restricted Certificate”).  Any transferee of a Book-Entry ERISA Restricted Certificate
will be deemed to have represented, by virtue of its acquisition or holding of such Certificate (or interest therein), that either
(i) such transferee is not an employee benefit or other plan subject to the prohibited transaction provisions of ERISA or Section
4975 of the Code, or any person (including an investment manager, a named fiduciary or a trustee of any such plan) acting, directly
or indirectly, on behalf of or purchasing such Certificate with “plan assets” of any such plan (a “Plan
Investor”), (ii) such transferee is an insurance company, the source of funds to be used by it to acquire or hold such
Certificate is an “insurance company general account” (within the meaning of Department of Labor Prohibited Transaction
Class Exemption (“PTCE”) 95-60), and the conditions in Sections I and III of PTCE 95-60 have been satisfied
(each entity that satisfies this clause (ii), a “Complying Insurance Company”) or (iii) such Certificate was
rated “BBB-” or better (or its equivalent) by at least one of the Rating Agencies at the time of such
transferee’s acquisition of such Certificate (or interest therein).


(3)        If any Book-Entry ERISA Restricted
Certificate (or any interest therein) is acquired or held in violation of the provisions of Section 5.01(g)(2) above, then the last
preceding transferee that either (i) is not a Plan Investor, (ii) is a Complying Insurance Company or (iii) acquired such
Certificate at a time when such Certificate was rated “BBB-” or better (or its equivalent) by at least one of the
Rating Agencies shall be restored, to the extent permitted by law, to all rights and obligations as Beneficial Holder thereof
retroactive to the date of transfer of such Certificate by such preceding transferee.  Neither the Trust nor the Trustee shall
be under any liability to any Person for making any payments due on such Certificate to such preceding transferee.


(4)        Any purported Beneficial Holder whose
acquisition or holding of any Book-Entry ERISA Restricted Certificate (or interest therein) was effected in violation of the
restrictions in this Section 5.01(g) shall indemnify and hold harmless the Company, the Trustee, the Delaware Trustee, the
Servicer, the Trust and each Underwriter from and against any and all liabilities, claims, costs or expenses incurred by such
parties as a result of such acquisition or holding.


Section 5.02.        Certificates Issuable in Classes; Distributions of
Principal and Interest; Authorized Denominations. The aggregate principal amount of the Certificates that may be
authenticated and delivered under this Agreement is limited to the aggregate Principal Balance of the Mortgage Loans as of the
Cut-Off Date, as specified in the Preliminary Statement to this Agreement, except for Certificates authenticated and delivered upon
registration of transfer of, or in exchange for, or in lieu of, other Certificates pursuant to Section 5.03. Such aggregate
principal amount shall be allocated among one or more Classes having designations, types of interests, initial per annum
Certificate Interest Rates, initial Class Principal Balances and Final Maturity Dates as specified in the Preliminary Statement to
this Agreement. The aggregate Percentage Interest of each Class of Certificates of which the Class Principal Balance equals zero as
of the Cut-Off Date that may be authenticated and delivered under this Agreement is limited to 100%. Certificates shall be issued
in Authorized Denominations.


Section 5.03.        Registration of Transfer and Exchange of
Certificates. The Trustee shall cause to be maintained at one of its offices or at its designated agent, a Certificate
Register in which there shall be recorded the name and address of each Certificateholder. Subject to such reasonable rules and
regulations as the Trustee may prescribe, the Certificate Register shall be amended from time to time by the Trustee or its agent
to reflect notice of any changes received by the Trustee or its agent pursuant to Section 10.06. The Trustee hereby appoints itself
as the initial Certificate Registrar.


Upon surrender for registration of transfer of any Certificate to the Trustee at the
Corporate Trust Office of the Trustee, or such other address or agency as may hereafter be provided to the Servicer in writing by
the Trustee, the Trustee shall execute, and the Trustee or any Authenticating Agent shall authenticate and deliver, in the name of
the designated transferee or transferees, one or more new Certificates of Authorized Denominations. At the option of the
Certificateholders, Certificates may be exchanged for other Certificates in Authorized Denominations of like Certificate Principal
Balance or Percentage Interest, as applicable, upon surrender of the Certificates to be exchanged at any such office or agency.
Whenever any Certificates are so surrendered for exchange, the Trustee on behalf of the Trust shall execute, and the Trustee, or
any Authenticating Agent, shall authenticate and deliver, the Certificates which the Certificateholder making the exchange is
entitled to receive. Every Certificate presented or surrendered for transfer shall (if so required by the Trustee or any
Authenticating Agent) be duly endorsed by, or be accompanied by a written instrument of transfer in form satisfactory to the
Trustee or any Authenticating Agent and duly executed by, the Holder thereof or such Holder’s attorney duly authorized in
writing.


A reasonable service charge may be made for any such exchange or transfer of Certificates,
and the Trustee may require payment of a sum sufficient to cover any tax or governmental charge that may be imposed in connection
with any exchange or transfer of Certificates.


All Certificates surrendered for exchange or transfer shall be cancelled by the Trustee or
any Authenticating Agent.


Section 5.04.        Mutilated, Destroyed, Lost or Stolen
Certificates. If (i) any mutilated Certificate is surrendered to the Trustee or any Authenticating Agent, or (ii) the
Trustee or any Authenticating Agent receives evidence to their satisfaction of the destruction, loss or theft of any Certificate,
and there is delivered to the Trustee or any Authenticating Agent such security or indemnity as may be required by them to save
each of them and the Trust harmless, then, in the absence of notice to the Trustee or any Authenticating Agent that such
Certificate has been acquired by a protected purchaser, the Trustee shall execute and the Trustee or any Authenticating Agent shall
authenticate and deliver, in exchange for or in lieu of any such mutilated, destroyed, lost or stolen Certificate, a new
Certificate of like Certificate Principal Balance or Percentage Interest as applicable. Upon the issuance of any new Certificate
under this Section 5.04, the Trustee or any Authenticating Agent may require the payment of a sum sufficient to cover any tax or
other governmental charge that may be imposed in relation thereto and any other expenses (including the fees and expenses of the
Trustee or any Authenticating Agent) connected therewith. Any replacement Certificate issued pursuant to this Section 5.04 shall
constitute complete and indefeasible evidence of ownership in REMIC II (or with respect to the Class R Certificates, the residual
ownership interests in REMIC I and REMIC II) as if originally issued, whether or not the lost or stolen Certificate shall be found
at any time.


Section 5.05.        Persons Deemed Owners. The Company, the
Servicer, the Trust, the Trustee, the Delaware Trustee and any agent of any of them may treat the Person in whose name any
Certificate is registered as the owner of such Certificate for the purpose of receiving distributions pursuant to Section 4.01 and
Section 4.04 and for all other purposes whatsoever, and none of the Company, the Servicer, the Trust, the Trustee, the Delaware
Trustee, the Certificate Registrar or any agent thereof shall be affected by notice to the contrary.


Section 5.06.        Temporary Certificates. Upon the initial
issuance of the Certificates, the Trustee on behalf of the Trust may execute, and the Trustee or any Authenticating Agent shall
authenticate and deliver, temporary Certificates which are printed, lithographed, typewritten or otherwise produced, in any
Authorized Denomination, of the tenor of the definitive Certificates in lieu of which they are issued and with such variations in
form from the forms of the Certificates set forth as Exhibits A, B and H hereto as the Trustee’s officers executing such
Certificates may determine, as evidenced by their execution of the Certificates.  Notwithstanding the foregoing, the
Certificates may remain in the form of temporary Certificates.


If temporary Certificates are issued, the Trustee shall cause definitive Certificates to
be prepared within ten Business Days after the Closing Date or as soon as practicable thereafter. After preparation of definitive
Certificates, the temporary Certificates shall be exchangeable for definitive Certificates upon surrender of the temporary
Certificates at the office or agency of the Trustee to be maintained as provided in Section 5.10 hereof, without charge to the
holder. Any tax or governmental charge that may be imposed in connection with any such exchange shall be borne by the Servicer.
Upon surrender for cancellation of any one or more temporary Certificates, the Trustee on behalf of the Trust shall execute and the
Trustee or any Authenticating Agent shall authenticate and deliver in exchange therefor a like principal amount of definitive
Certificates of Authorized Denominations. Until so exchanged, the temporary Certificates shall in all respects be entitled to the
same benefits under this Agreement as definitive Certificates.


Section 5.07.        Book-Entry for Book-Entry Certificates.
Notwithstanding the foregoing, the Book-Entry Certificates, upon original issuance, shall be issued in the form of one or more
typewritten Certificates of Authorized Denomination representing the Book-Entry Certificates, to be delivered to DTC, the initial
Clearing Agency, by, or on behalf of, the Company. The Book-Entry Certificates shall initially be registered on the Certificate
Register in the name of Cede & Co., the nominee of DTC, as the initial Clearing Agency, and no Beneficial Holder shall receive
a definitive certificate representing such Beneficial Holder’s interest in any Class of Book-Entry Certificate, except as
provided above and in Section 5.09. Each Book-Entry Certificate shall bear the following legend:


Unless this Certificate is presented by an authorized representative of The Depository
Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


Unless and until definitive, fully registered Book-Entry Certificates (the
“Definitive Certificates”) have been issued to the Beneficial Holders pursuant to Section 5.09:


(a)        the provisions of this Section 5.07 shall be
in full force and effect with respect to the Book-Entry Certificates;


(b)        the Servicer and the Trustee may deal with
the Clearing Agency for all purposes with respect to the Book-Entry Certificates (including the making of distributions on the
Book-Entry Certificates) as the sole Certificateholder;


(c)        to the extent that the provisions of this
Section 5.07 conflict with any other provisions of this Agreement, the provisions of this Section 5.07 shall control;
and


(d)        the rights of the Beneficial Holders shall
be exercised only through the Clearing Agency and the DTC Participants and shall be limited to those established by law and
agreements between such Beneficial Holders and the Clearing Agency and/or the DTC Participants. Pursuant to the Depositary
Agreement, unless and until Definitive Certificates are issued pursuant to Section 5.09, the initial Clearing Agency will make
book-entry transfers among the DTC Participants and receive and transmit distributions of principal and interest on the related
Class of Book-Entry Certificates to such DTC Participants.


For purposes of any provision of this Agreement requiring or permitting actions with the
consent of, or at the direction of, Holders of Book-Entry Certificates evidencing a specified Percentage Interest, such direction
or consent may be given by the Clearing Agency at the direction of Beneficial Holders owning Book-Entry Certificates evidencing the
requisite Percentage Interest represented by the Book-Entry Certificates. The Clearing Agency may take conflicting actions with
respect to the Book-Entry Certificates to the extent that such actions are taken on behalf of the Beneficial Holders.


Section 5.08.        Notices to Clearing Agency. Whenever notice
or other communication to the Certificateholders is required under this Agreement, unless and until Definitive Certificates shall
have been issued to the related Certificateholders pursuant to Section 5.09, the Trustee shall give all such notices and
communications specified herein to be given to Holders of the Book-Entry Certificates to the Clearing Agency which shall give such
notices and communications to the related DTC Participants in accordance with its applicable rules, regulations and procedures.


Section 5.09.        Definitive Certificates. If (a) the Clearing
Agency or the Servicer notifies the Trustee in writing that the Clearing Agency is no longer willing or able to discharge properly
its responsibilities under the Depositary Agreement with respect to the Book-Entry Certificates and the Trustee or the Servicer is
unable to locate a qualified successor, (b) the Servicer, with the consent of the related DTC Participants, advises the Trustee in
writing that it elects to terminate the book-entry system with respect to the Book-Entry Certificates through the Clearing Agency
or (c) after the occurrence of an Event of Default, Certificateholders holding Book-Entry Certificates evidencing Percentage
Interests aggregating not less than 66% of the aggregate Class Principal Balance of such Certificates advise the Trustee and the
Clearing Agency through DTC Participants in writing that the continuation of a book-entry system with respect to the Book-Entry
Certificates through the Clearing Agency is no longer in the best interests of the Certificateholders with respect to such
Certificates, the Trustee shall notify all Certificateholders of Book-Entry Certificates of the occurrence of any such event and of
the availability of Definitive Certificates. Upon surrender to the Trustee of the Book-Entry Certificates by the Clearing Agency,
accompanied by registration instructions from the Clearing Agency for registration, the Trustee on behalf of the Trust shall
execute and the Trustee or any Authenticating Agent shall authenticate and deliver the Definitive Certificates. Neither the
Company, the Servicer, the Trust nor the Trustee shall be liable for any delay in delivery of such instructions and may
conclusively rely on, and shall be protected in relying on, such instructions. Upon the issuance of Definitive Certificates for all
of the Certificates all references herein to obligations imposed upon or to be performed by the Clearing Agency shall be deemed to
be imposed upon and performed by the Trustee, to the extent applicable with respect to such Definitive Certificates, and the
Trustee shall recognize the Holders of Definitive Certificates as Certificateholders hereunder.


Section 5.10.        Office for Transfer of Certificates. The
Trustee shall maintain an office or agency where Certificates may be surrendered for registration of transfer or exchange. The
Corporate Trust Office is initially designated for said purposes.


Section 5.11.        Nature of Certificates. The Certificates
shall be personal property giving only the rights specifically set forth therein and in this Agreement.  The Certificates
shall have no preemptive or similar rights and when issued and delivered to the Holders against payment of the purchase price
therefor will be fully paid and nonassessable by the Trust.  The Holders of the Certificates, in their capacities as such,
shall be entitled to the same limitation of personal liability extended to stockholders of private corporations for profit
organized under the General Corporation Law of the State of Delaware. THE RECEIPT AND ACCEPTANCE OF A CERTIFICATE OR ANY INTEREST
THEREIN BY OR ON BEHALF OF A HOLDER OR ANY BENEFICIAL OWNER, WITHOUT ANY SIGNATURE OR FURTHER MANIFESTATION OF ASSENT, SHALL
CONSTITUTE THE UNCONDITIONAL ACCEPTANCE BY THE HOLDER AND ALL OTHERS HAVING A BENEFICIAL INTEREST IN SUCH CERTIFICATE OF ALL THE
TERMS AND PROVISIONS OF THIS AGREEMENT, AND SHALL CONSTITUTE THE AGREEMENT OF THE TRUST, SUCH HOLDER AND SUCH OTHERS THAT THE TERMS
AND PROVISIONS OF THIS AGREEMENT SHALL BE BINDING, OPERATIVE AND EFFECTIVE AS BETWEEN THE TRUST AND SUCH HOLDER AND SUCH
OTHERS.


ARTICLE VI




The Company and the Servicer


Section 6.01.        Liability of the Company and the Servicer.
Each of the Company and the Servicer shall be liable in accordance herewith only to the extent of the obligations specifically
imposed upon and undertaken by the Company or the Servicer, as applicable, herein.


Section 6.02.        Merger or Consolidation of the Company or the
Servicer. Any Corporation into which either the Company or the Servicer may be merged or consolidated, or any
Corporation resulting from any merger, conversion or consolidation to which either the Company or the Servicer shall be a party, or
any Corporation succeeding to the business of either the Company or the Servicer, shall be the successor of the Company or the
Servicer, as applicable, hereunder, without the execution or filing of any paper or any further act on the part of any of the
parties hereto, anything herein to the contrary notwithstanding.


Section 6.03.        Limitation on Liability of the Company, the Servicer
and Others. Neither the Company nor the Servicer nor any of the directors, officers, employees or agents of the Company
or the Servicer shall be under any liability to the Trust, the Holders of the REMIC I Regular Interests or the Certificateholders
for any action taken by such Person or for such Person’s refraining from the taking of any action in good faith pursuant to
this Agreement, or for errors in judgment; provided, however, that this provision shall not protect the Company, the
Servicer or any such Person against any liability which would otherwise be imposed by reason of willful misfeasance, bad faith or
gross negligence in the performance of duties or by reason of reckless disregard of duties and obligations hereunder. Each of the
Company, the Servicer and any director, officer, employee or agent of the Company or the Servicer, as applicable, may rely in good
faith on any document of any kind properly executed and submitted by any Person respecting any matters arising hereunder. Each of
the Company, the Servicer and any director, officer, employee or agent of the Company or the Servicer, as applicable, shall be
indemnified by the Trust and held harmless against any loss, liability or expense incurred in connection with any legal action
relating to this Agreement or the Certificates, other than any loss, liability or expense relating to any Mortgage Loan (other than
as otherwise permitted in this Agreement) or incurred by reason of willful misfeasance, bad faith or gross negligence in the
performance of duties hereunder or by reason of reckless disregard of obligations and duties hereunder. The Servicer shall not be
under any obligation to appear in, prosecute or defend any legal action which is not incidental to its duties related to the
Mortgage Loans in accordance with this Agreement and which in its opinion may involve it in any expense or liability; provided,
however, that each of the Company and the Servicer may in its discretion undertake any such action which it may deem necessary
or desirable with respect to the Mortgage Loans, this Agreement, the Certificates or the rights and duties of the parties hereto
and the interests of the Certificateholders hereunder. In such event, the legal expenses and costs of such action and any liability
resulting therefrom shall be expenses, costs and liabilities of the Trust and the Company and the Servicer shall be entitled to be
reimbursed, as applicable, therefor out of the Certificate Account, as provided by Section 3.05.


Section 6.04.        Neither the Company nor the Servicer may
Resign. Neither the Company nor the Servicer shall resign from its respective obligations and duties hereby imposed on
it, as applicable, except upon determination by the Company or the Servicer that its respective duties hereunder are no longer
permissible under applicable law.  Any successor Servicer shall not resign from the obligations and duties hereby imposed on
it except upon determination that its duties hereunder are no longer permissible under applicable law. Any such determination
permitting the resignation of the Company, the Servicer or any successor Servicer shall be evidenced by an Opinion of Counsel to
such effect delivered to the Trustee. No such resignation shall become effective until the Trustee or a successor Servicer shall
have assumed the Servicer’s responsibilities and obligations in accordance with Section 7.02 hereof.


If Washington Mutual Bank is no longer acting as Servicer, then the successor Servicer
shall give prompt written notice to the Company of any information received by such successor Servicer which affects or relates to
an ongoing obligation or right of the Company under this Agreement.


Section 6.05.        Trustee Access. The Servicer shall afford the Company and the Trustee, upon reasonable notice, during normal business hours
access to all records maintained by the Servicer, in respect of the Mortgage Loans and in respect of its rights and obligations
hereunder and access to such of its officers as are responsible for such obligations.  Upon reasonable request, the Servicer,
shall furnish the Company and the Trustee with its most recent financial statements (or, for so long as Washington Mutual Bank is
the Servicer, the most recent consolidated financial statements for Washington Mutual Bank appearing in the audited financial
statements of Washington Mutual, Inc., or the entity with whose financial statements the financial statements of Washington Mutual
Bank are consolidated) and such other information as it possesses, and which it is not prohibited by law or, to the extent
applicable, binding obligations to third parties with respect to confidentiality from disclosing, regarding its business, affairs,
property and condition, financial or otherwise.


ARTICLE VII




Default


Section 7.01.        Events of Default. (a) In case one or more
of the following Events of Default by the Servicer or by a successor Servicer shall occur and be continuing, that is to say:


(i)                  Any failure by
the Servicer to deposit into the Certificate Account any payment required to be deposited therein by the Servicer under the terms
of this Agreement which continues unremedied for a period of five Business Days after the date upon which written notice of such
failure, requiring the same to be remedied, shall have been given to the Servicer by the Trustee or to the Servicer and the Trustee
by the Holders of Certificates evidencing Percentage Interests aggregating not less than 25% of REMIC II; or


(ii)                Failure on the part of the
Servicer duly to observe or perform in any material respect any other of the covenants or agreements on the part of the Servicer
contained in the Certificates or in this Agreement which continues unremedied for a period of 60 days after the date on which
written notice of such failure, requiring the same to be remedied, shall have been given to the Servicer by the Trustee, or to the
Servicer and the Trustee by the Holders of Certificates evidencing Percentage Interests aggregating not less than 25% of REMIC II;
or


(iii)               A decree or order of a court or
agency or supervisory authority having jurisdiction in the premises for the appointment of a trustee in bankruptcy, conservator or
receiver or liquidator in any bankruptcy, insolvency, readjustment of debt, marshalling of assets and liabilities or similar
proceedings, or for the winding‐up or liquidation of its affairs, shall have been entered against the Servicer and such
decree or order shall have remained in force undischarged or unstayed for a period of 60 days; or


(iv)              The Servicer shall consent to the
appointment of a trustee in bankruptcy, conservator or receiver or liquidator in any bankruptcy, insolvency, readjustment of debt,
marshalling of assets and liabilities or similar proceedings of or relating to the Servicer or of or relating to all or
substantially all of its property; or


(v)                The Servicer shall admit in
writing its inability to pay its debts generally as they become due, file a petition to take advantage of any applicable
bankruptcy, insolvency or reorganization statute, make an assignment for the benefit of its creditors, or voluntarily suspend
payment of its obligations; or


(vi)              Any failure of the Servicer to make any
Monthly P&I Advance (other than a Nonrecoverable Advance) which continues unremedied at the opening of business on the
Distribution Date in respect of which such Monthly P&I Advance was to have been made;


then, and in each and every such case, so long as an Event of Default shall not have been
remedied, either the Trustee or the Holders of Certificates evidencing Percentage Interests aggregating not less than 25% of REMIC
II, by notice in writing to the Company and the Servicer (and to the Trustee if given by the Certificateholders, in which case such
notice shall set forth evidence reasonably satisfactory to the Trustee that such Event of Default has occurred and shall not have
been remedied) may terminate all of the rights (other than its right to reimbursement for advances) and obligations of the
Servicer, including its right to the Servicing Fee, under this Agreement and in and to the Mortgage Loans and the proceeds thereof,
if any. Such determination shall be final and binding. On or after the receipt by the Servicer of such written notice, all
authority and power of the Servicer under this Agreement, whether with respect to the Certificates or the Mortgage Loans or
otherwise, shall pass to and be vested in the Trustee pursuant to and under this Section 7.01; and, without limitation, the Trustee
is hereby authorized and empowered to execute and deliver, on behalf of the Servicer, as attorney‐in‐fact or otherwise,
any and all documents and other instruments, and to do or accomplish all other acts or things necessary or appropriate to effect
the purposes of such notice of termination, whether to complete the transfer and endorsement or assignment of the Mortgage Loans
and related documents, or otherwise. The Servicer agrees to cooperate with the Trustee in effecting the termination of the
Servicer's responsibilities and rights hereunder, including, without limitation, the transfer to the Trustee for administration by
it of all cash amounts which shall at the time be credited by the Servicer to the Certificate Account or thereafter be received
with respect to the Mortgage Loans.


Notwithstanding the foregoing, if an Event of Default described in clause (vi) of this
Section 7.01(a) shall occur, the Trustee shall, by notice in writing to the Servicer, which may be delivered by telecopy,
immediately suspend all of the rights and obligations of the Servicer thereafter arising under this Agreement, but without
prejudice to any rights it may have as a Certificateholder or to reimbursement of Monthly P&I Advances and other advances of
its own funds, and the Trustee shall act as provided in Section 7.02 to carry out the duties of the Servicer, including the
obligation to make any Monthly P&I Advance the nonpayment of which was an Event of Default described in clause (vi) of this
Section 7.01(a). Any such action taken by the Trustee must be prior to the distribution on the relevant Distribution Date. If
the Servicer shall within two Business Days following such suspension remit to the Trustee the amount of any Monthly P&I
Advance (plus interest accrued thereon at a per annum rate equal to the prime rate for United States money center commercial banks
as published in The Wall Street Journal) the nonpayment of which by the Servicer was an Event of Default described in
clause (vi) of this Section 7.01(a), the Trustee, subject to the last sentence of this paragraph, shall permit the
Servicer to resume its rights and obligations as Servicer hereunder. The Servicer agrees that it will reimburse the Trustee for
actual, necessary and reasonable costs incurred by the Trustee because of action taken pursuant to clause (vi) of this Section
7.01(a). The Servicer agrees that if an Event of Default as described in clause (vi) of this Section 7.01(a) shall occur more than
two times in any twelve month period, the Trustee shall be under no obligation to permit the Servicer to resume its rights and
obligations as Servicer hereunder.


(b)        In case one or more of the following Events
of Default by the Company shall occur and be continuing, that is to say:


(i)                  Failure on the
part of the Company duly to observe or perform in any material respect any of the covenants or agreements on the part of the
Company contained in the Certificates or in this Agreement which continues unremedied for a period of 60 days after the date on
which written notice of such failure, requiring the same to be remedied, shall have been given to the Company by the Trustee, or to
the Company and the Trustee by the Holders of Certificates evidencing Percentage Interests aggregating not less than 25% of REMIC
II; or


(ii)                A decree or order of a court
or agency or supervisory authority having jurisdiction in the premises for the appointment of a trustee in bankruptcy, conservator
or receiver or liquidator in any bankruptcy, insolvency, readjustment of debt, marshalling of assets and liabilities or similar
proceedings, or for the winding‐up or liquidation of its affairs, shall have been entered against the Company and such decree
or order shall have remained in force undischarged or unstayed for a period of 60 days; or


(iii)               The Company shall consent to the
appointment of a trustee in bankruptcy, conservator or receiver or liquidator in any bankruptcy, insolvency, readjustment of debt,
marshalling of assets and liabilities or similar proceedings of or relating to the Company or of or relating to all or
substantially all of its property; or


(iv)              The Company shall admit in writing its
inability to pay its debts generally as they become due, file a petition to take advantage of any applicable bankruptcy, insolvency
or reorganization statute, make an assignment for the benefit of creditors, or voluntarily suspend payment of its obligations;


then, and in each and every such case, so long as such Event of Default shall not have
been remedied, the Holders of Certificates evidencing Percentage Interests aggregating not less than 25% of REMIC II, by notice in
writing to the Company and the Trustee, may direct the Trustee in accordance with Section 10.03 to institute an action, suit or
proceeding in its own name as Trustee hereunder to enforce the Company's obligations hereunder.


(c)        In any circumstances in which this Agreement
states that Certificateholders owning Certificates evidencing a certain Percentage Interest in REMIC II may take certain action,
such action shall be taken by the Trustee, but only if the requisite percentage of Certificateholders required under this Agreement
for taking like action or giving like instruction to the Trustee under this Agreement shall have so directed the Trustee in
writing.


Section 7.02.        Trustee to Act; Appointment of
Successor.


(a)        On and after the date on which the Servicer
receives a notice of termination pursuant to Section 7.01 or the Servicer resigns pursuant to Section 6.04, the Trustee shall be
the successor in all respects to the Servicer under this Agreement with respect to the Mortgage Loans in the Mortgage Pool and with
respect to the transactions set forth or provided for herein and shall have all the rights and powers and be subject to all the
responsibilities, duties and liabilities relating thereto arising on or after such date of termination or resignation placed on the
Servicer by the terms and provisions hereof and thereof, and shall have the same limitations on liability herein granted to the
Servicer; provided, that the Trustee shall not under any circumstances be responsible for any representations and warranties
or any Purchase Obligation of the Company or any liability incurred by the Servicer prior to such date of termination or
resignation and the Trustee shall not be obligated to make a Monthly P&I Advance if it is prohibited by law from so doing. As
compensation therefor, the Trustee shall be entitled to all funds relating to the Mortgage Loans which the Servicer would have been
entitled to retain or to withdraw from the Certificate Account if the Servicer had continued to act hereunder, except for those
amounts due to the Servicer as reimbursement for advances previously made or amounts previously expended and are otherwise
reimbursable hereunder. Notwithstanding the above, the Trustee may, if it shall be unwilling to so act, or shall if it is unable to
so act, appoint, or petition a court of competent jurisdiction to appoint, any established housing and home finance institution
having a net worth of not less than $10,000,000 as the successor to the Servicer hereunder in the assumption of all or any part of
the responsibilities, duties or liabilities of the Servicer hereunder. Pending any such appointment, the Trustee is obligated to
act in such capacity. In connection with such appointment and assumption, the Trustee may make such arrangements for the
compensation of such successor out of payments on Mortgage Loans as it and such successor shall agree; provided, however,
that no such compensation shall, together with the compensation to the Trustee, be in excess of that permitted the Servicer
hereunder. The Trustee and such successor shall take such actions, consistent with this Agreement, as shall be necessary to
effectuate any such succession.


(b)        In connection with any termination or
resignation of the Servicer hereunder, in the event that any of the Mortgage Loans are MERS Loans, either (i) the successor
Servicer (including the Trustee if the Trustee is acting as successor Servicer) shall represent and warrant that it is a member of
MERS in good standing and shall agree to comply in all material respects with the rules and procedures of MERS in connection with
the servicing of the MERS Loans, in which case the predecessor Servicer shall cooperate with the successor Servicer in registering
the transfer of servicing of the MERS Loans to the successor Servicer on the MERS® System in accordance with MERS’ rules
and procedures, or (ii) if the successor Servicer is not a member of MERS, the predecessor Servicer shall cooperate with the
successor Servicer in (A) de-registering the MERS Loans from the MERS® System and (B) causing MERS to execute and deliver an
assignment from MERS to the Trust of the Mortgage securing each MERS Loan in recordable form and in the form otherwise provided
under clause (X)(iii) of the definition of “Mortgage File” herein and to execute and deliver such other notices,
documents and other instruments as may be necessary or desirable to effect such de-registration and assignment. The predecessor
Servicer shall bear any and all fees of MERS and all fees and costs of preparing and recording any assignments of Mortgages as
required under this Section 7.02(b).


Section 7.03.        Notification to Certificateholders. Upon any
such termination or appointment of a successor to the Servicer, the Trustee shall give prompt written notice thereof to the
Certificateholders at their respective addresses appearing in the Certificate Register.


ARTICLE VIII




Concerning the Trustees


Section 8.01.        Duties of Trustees.


(a)        The Trustee, prior to the occurrence of an
Event of Default and after the curing of all Events of Default which may have occurred, undertakes to perform such duties and only
such duties as are specifically set forth in this Agreement. In case an Event of Default has occurred (which has not been cured or
waived) the Trustee shall exercise such of the rights and powers vested in it by this Agreement, and use the same degree of care
and skill in its exercise as a prudent person would exercise or use under the circumstances in the conduct of such person’s
own affairs.


(b)        The Trustee, upon receipt of all
resolutions, certificates, statements, opinions, reports, documents, orders or other instruments furnished to it which are
specifically required to be furnished to it pursuant to any provision of this Agreement, shall examine them to determine whether
they are in the form required by this Agreement; provided, however, that the Trustee shall not be responsible for the accuracy or
content of any such certificate, statement, opinion, report, or other order or instrument furnished by the Company or Servicer to
the Trustee pursuant to this Agreement.


(c)        No provision of this Agreement shall be
construed to relieve the Trustee or the Delaware Trustee from liability for its own negligent action, its own negligent failure to
act or its own willful misconduct; provided, however, that:


(i)                  Prior to the
occurrence of an Event of Default and after the curing of all such Events of Default which may have occurred, the duties and
obligations of the Trustee shall be determined solely by the express provisions of this Agreement,


(ii)                Neither the Trustee nor the
Delaware Trustee shall be liable except for the performance of such duties and obligations as are specifically set forth in this
Agreement, no implied covenants or obligations shall be read into this Agreement against the Trustee or the Delaware Trustee, and,
in the absence of bad faith on the part of the Trustee or the Delaware Trustee, such trustee may conclusively rely, as to the truth
of the statements and the correctness of the opinions expressed therein, upon any certificates or opinions furnished to such
trustee and conforming to the requirements of this Agreement; and


(iii)               Neither the Trustee nor the
Delaware Trustee shall be personally liable with respect to any action taken or omitted to be taken by it in good faith in
accordance with the direction of the Certificateholders holding Certificates which evidence Percentage Interests aggregating not
less than 25% of REMIC II relating to the time, method and place of conducting any proceeding for any remedy available to such
trustee, or relating to the exercise of any trust or power conferred upon such trustee under this Agreement.


(d)        Within ten Business Days after the
occurrence of any Event of Default known to the Trustee, the Trustee shall transmit by mail to the Rating Agencies notice of each
Event of Default. Within 90 days after the occurrence of any Event of Default known to the Trustee, the Trustee shall transmit by
mail to all Certificateholders (with a copy to the Rating Agencies) notice of each Event of Default, unless such Event of Default
shall have been cured or waived; provided, however, the Trustee shall be protected in withholding such notice if and so long as a
Responsible Officer of the Trustee in good faith determines that the withholding of such notice is in the best interests of the
Certificateholders; and provided, further, that in the case of any Event of Default of the character specified in Section 7.01(i)
and Section 7.01(ii) no such notice to Certificateholders or to the Rating Agencies shall be given until at least 30 days after the
occurrence thereof.


Section 8.02.        Certain Matters Affecting the Trustees.
Except as otherwise provided in Section 8.01:


(i)                  Each of the
Trustee and the Delaware Trustee may request and rely upon and shall be protected in acting or refraining from acting upon any
resolution, Officer’s Certificate, certificate of auditors or any other certificate, statement, instrument, opinion, report,
notice, request, consent, order, approval, bond or other paper or document believed by it to be genuine and to have been signed or
presented by the proper party or parties;


(ii)                Each of the Trustee and the
Delaware Trustee may consult with counsel and any Opinion of Counsel shall be full and complete authorization and protection in
respect of any action taken or suffered or omitted by it hereunder in good faith and in accordance with such Opinion of
Counsel;


(iii)               Neither the Trustee nor the
Delaware Trustee shall be personally liable for any action taken or omitted by it in good faith and reasonably believed by it to be
authorized or within the discretion or rights or powers conferred upon it by this Agreement;


(iv)              Prior to the occurrence of an Event of
Default hereunder and after the curing of all Events of Default which may have occurred, neither the Trustee nor the Delaware
Trustee shall be bound to make any investigation into the facts or matters stated in any resolution, certificate, statement,
instrument, opinion, report, notice, request, consent, order, approval, bond or other paper or document, unless requested in
writing to do so by the Holders of Certificates evidencing Percentage Interests aggregating not less than 25% of REMIC II;
provided, however, that if the payment within a reasonable time to the Trustee or the Delaware Trustee of the costs, expenses or
liabilities likely to be incurred by it in the making of such investigation is, in the opinion of such trustee, not reasonably
assured to such trustee by the security, if any, afforded to it by the terms of this Agreement, such trustee may require reasonable
indemnity against such expense or liability as a condition to proceeding;


(v)                Each of the Trustee and the
Delaware Trustee may execute the trust or any of the powers hereunder or perform any duties hereunder either directly or by or
through agents or attorneys selected by it with reasonable care or designated by the Company;


(vi)              Neither the Trustee nor the Delaware
Trustee shall be deemed to have knowledge or notice of any matter, including without limitation an Event of Default, unless
actually known by a Responsible Officer, or unless written notice thereof referencing this Agreement or the Certificates is
received at the Notice Address of such trustee;


(vii)             In no event shall the Trustee or the Delaware
Trustee be held liable for acts or omissions of the Servicer or the other trustee (excepting the Trustee’s own actions as
Servicer).   No provision of this Agreement shall require the Trustee or the Delaware Trustee to expend or risk its own
funds or otherwise incur any financial liability in the performance of any of its duties hereunder (except for the giving of
required notices), or in the exercise of any of its rights or powers, if it shall have reasonable grounds for believing the
repayment of such funds or adequate indemnity against such risk or liability is not reasonably assured to it;


(viii)           When the Trustee is acting as Servicer pursuant to Section
7.02, and to the extent permitted under applicable law, the Trustee is hereby authorized, in making or disposing of any investment
permitted hereunder, to deal with itself (in its individual capacity) or with any one or more of its affiliates, whether it or its
affiliate is acting as an agent of the Trustee or of any third person or dealing as principal for its own account; and


(ix)              Except as expressly provided in this
Agreement, in no event shall the Trustee be under any duty or obligation to monitor, determine, investigate or compel compliance by
the Trust with the requirements of the Statutory Trust Statute.


Section 8.03.        Trustees Not Liable for Certificates or Mortgage
Loans. The recitals contained herein (other than those relating to the due organization, power and authority of the
Trustee and the Delaware Trustee) and in the Certificates (other than the execution of, and certificate of authentication on, the
Certificates) shall be taken as the statements of the Company or the Trust, as applicable, and neither the Trustee nor the Delaware
Trustee assumes any responsibility for their correctness. Neither the Trustee nor the Delaware Trustee makes any representations as
to the validity or sufficiency of this Agreement or of the Certificates or any Mortgage Loan. Neither the Trustee nor the Delaware
Trustee shall be accountable for the use or application by the Company or the Trust, as applicable, of any of the Certificates or
of the proceeds of such Certificates, or for the use or application of any funds paid to the Servicer or the Company in respect of
the Mortgage Loans or deposited into the Custodial Accounts for P&I, any Buydown Fund Account, or the Custodial Accounts for
P&I or into the Investment Account, or the Certificate Account by the Servicer or the Company.


Section 8.04.        Trustees May Own Certificates. The Trustee,
the Delaware Trustee or any agent or affiliate of such trustee, in its individual or any other capacity, may become the owner or
pledgee of Certificates with the same rights it would have if it were not trustee.


Section 8.05.        The Servicer to Pay Trustees’ Fees and
Expenses. Subject to separate written agreements with the Trustee and the Delaware Trustee, the Servicer covenants and
agrees to, and the Servicer shall, pay each of the Trustee and the Delaware Trustee from time to time, and such trustee shall be
entitled to payment, for all services rendered by it in the execution of the trust hereby created and in the exercise and
performance of any of the powers and duties hereunder of such trustee. Except as otherwise expressly provided herein, the Servicer
shall pay or reimburse each of the Trustee and the Delaware Trustee upon such trustee’s request for all reasonable expenses
and disbursements incurred or made by such trustee in accordance with any of the provisions of this Agreement, including any such
expenses incurred or made in connection with a transfer of servicing, and shall indemnify such trustee from any loss, liability or
expense incurred by it hereunder (including the reasonable compensation and the expenses and disbursements of its counsel and of
all persons not regularly in its employ and any expenses which arise out of or are imposed upon the Trustee or the Delaware Trustee
in connection with the creation, operation or termination of the Trust) except any such expense or disbursement as may arise from
its own negligence or bad faith. Such obligation shall survive the termination of this Agreement or resignation or removal of the
Trustee or the Delaware Trustee. The Tax Matters Person shall, at its expense, prepare or cause to be prepared all federal and
state income tax and franchise tax and information returns relating to REMIC I or REMIC II required to be prepared or filed by the
Trustee or the Delaware Trustee and shall indemnify the Trustee and the Delaware Trustee for any liability of such trustees arising
from any error in such returns.


Section 8.06.        Eligibility Requirements for Trustees. The
Trustee hereunder shall at all times be (i) an institution insured by the FDIC, (ii) a Corporation organized and doing business
under the laws of the United States of America or of any state, authorized under such laws to exercise corporate trust powers,
having a combined capital and surplus of not less than $50,000,000 and subject to supervision or examination by federal or state
authority and (iii) acceptable to the Rating Agencies. If such Corporation publishes reports of condition at least annually,
pursuant to law or to the requirements of any aforementioned supervising or examining authority, then for the purposes of this
Section 8.06, the combined capital and surplus of such Corporation shall be deemed to be its combined capital and surplus as set
forth in its most recent report of condition so published.  The Delaware Trustee hereunder shall at all times have its
principal place of business in the State of Delaware and shall satisfy the applicable requirements under the laws of the State of
Delaware authorizing it to act as the Delaware trustee of the Trust.  In case at any time the Trustee or the Delaware Trustee
shall cease to be eligible in accordance with the provisions of this Section 8.06, such trustee shall resign immediately in the
manner and with the effect specified in Section 8.07.


Section 8.07.        Resignation and Removal of Trustees. Each of
the Trustee and the Delaware Trustee may at any time resign and be discharged from the trust hereby created by giving written
notice thereof to the Servicer. Upon receiving such notice of resignation, the Servicer shall promptly appoint a successor trustee
by written instrument, in duplicate, one copy of which instrument shall be delivered to the resigning trustee and one copy to the
successor trustee. If no successor trustee shall have been so appointed and shall have accepted appointment within 30 days after
the giving of such notice of resignation, the resigning trustee may petition any court of competent jurisdiction for the
appointment of a successor trustee.


If at any time the Trustee or the Delaware Trustee shall cease to be eligible in
accordance with the provisions of Section 8.06 and shall fail to resign after written request therefor by the Servicer, or if at
any time the Trustee or the Delaware Trustee shall become incapable of acting, or shall be adjudged bankrupt or insolvent, or a
receiver of such trustee or of its property shall be appointed, or any public officer shall take charge or control of such trustee
or of its property or affairs for the purpose of rehabilitation, conservation or liquidation, then the Servicer may remove such
trustee and appoint a successor trustee by written instrument, in duplicate, copies of which instrument shall be delivered to the
trustee so removed, the trustee continuing in its capacity and the successor trustee.


The Holders of Certificates evidencing Percentage Interests aggregating more than 50% of
REMIC II may at any time remove the Trustee or the Delaware Trustee and appoint a successor trustee by written instrument or
instruments, in triplicate, signed by such Holders or their attorneys in-fact duly authorized, one complete set of which
instruments shall be delivered to the Servicer, one complete set to the Trustee so removed and one complete set to the successor so
appointed.


Any resignation or removal of the Trustee or the Delaware Trustee and appointment of a
successor trustee pursuant to any of the provisions of this Section 8.07 shall become effective upon acceptance of appointment by
the successor trustee as provided in Section 8.08. Any expenses associated with the resignation of the Trustee or the Delaware
Trustee shall be borne by such trustee, and any expenses associated with the removal of the Trustee or the Delaware Trustee shall
be borne by the Servicer.


Section 8.08.        Successor Trustee. Any successor trustee
appointed as provided in Section 8.07 shall execute, acknowledge and deliver to the Servicer and to its predecessor trustee an
instrument accepting such appointment hereunder, and thereupon the resignation or removal of the predecessor trustee shall become
effective and such successor trustee, without any further act, deed or conveyance, shall become fully vested with all the rights,
powers, duties and obligations of its predecessor hereunder, with like effect as if originally named as Trustee or Delaware Trustee
herein. The predecessor shall deliver to the successor trustee all Mortgage Files, related documents, statements and all other
property held by it hereunder, and the Servicer and the predecessor trustee shall execute and deliver such instruments and do such
other things as may reasonably be required for more fully and certainly vesting and confirming in the successor trustee all such
rights, powers, duties and obligations.


No successor trustee shall accept appointment as provided in this Section 8.08 unless at
the time of such appointment such successor trustee shall be eligible under the provisions of Section 8.06.


Upon acceptance of appointment by a successor trustee as provided in this Section 8.08,
the Servicer shall mail notice of the succession of such trustee hereunder to (i) all Certificateholders at their addresses as
shown in the Certificate Register and (ii) the Rating Agencies. If the Servicer fails to mail such notice within ten days after
acceptance of appointment by the successor trustee, the successor trustee shall cause such notice to be mailed.


Section 8.09.        Merger or Consolidation of Trustee. Any
Corporation into which the Trustee or the Delaware Trustee may be merged or converted or with which it may be consolidated, or any
Corporation resulting from any merger, conversion or consolidation to which the Trustee or the Delaware Trustee shall be a party,
or any Corporation succeeding to the corporate trust business of such trustee, shall be the successor of such trustee hereunder,
provided such resulting or successor Corporation shall be eligible under the provisions of Section 8.06, without the execution or
filing of any paper or any further act on the part of any of the parties hereto, anything herein to the contrary
notwithstanding.


Section 8.10.        Appointment of Co-Trustee or Separate
Trustee. Notwithstanding any other provisions hereof, at any time, for the purpose of meeting any legal requirements of
any jurisdiction in which any part of the assets of the Trust may at the time be located, the Servicer and the Trustee or the
Delaware Trustee, as applicable, acting jointly shall have the power and shall execute and deliver all instruments to appoint one
or more Persons approved by such trustee to act as co-trustee or co-trustees, jointly with such trustee, or separate trustee or
separate trustees, of all or any part of the assets of the Trust and to vest in such Person or Persons, in such capacity, such
title to the assets of the Trust, or any part thereof, and, subject to the other provisions of this Section 8.10, such powers,
duties, obligations, rights and trusts as the Servicer and the Trustee or the Delaware Trustee, as applicable, may consider
necessary or desirable; provided, that the Trustee or the Delaware Trustee, as applicable, shall remain liable for all of its
obligations and duties under this Agreement. If the Servicer shall not have joined in such appointment within 15 days after the
receipt by it of a request so to do, or in case an Event of Default shall have occurred and be continuing, the Trustee or the
Delaware Trustee, as applicable, alone shall have the power to make such appointment; provided, that such trustee shall remain
liable for all of its obligations and duties under this Agreement. No co-trustee or separate trustee hereunder shall be required to
meet the terms of eligibility as a successor trustee under Section 8.06 hereunder and no notice to Certificateholders of the
appointment of co-trustee(s) or separate trustee(s) shall be required under Section 8.08 hereof.


In the case of any appointment of a co-trustee or separate trustee pursuant to this
Section 8.10, all rights, powers, duties and obligations conferred or imposed upon the Trustee or the Delaware Trustee, as
applicable, shall be conferred or imposed upon and exercised or performed by the Trustee or the Delaware Trustee, as applicable,
and such separate trustee or co-trustee jointly and severally, except to the extent that under any law of any jurisdiction in which
any particular act or acts are to be performed by the Trustee or the Delaware Trustee, as applicable (whether as Trustee or
Delaware Trustee hereunder or as successor to the Servicer hereunder), such trustee shall be incompetent or unqualified to perform
such act or acts, in which event such rights, powers, duties and obligations (including the holding of title to the assets of the
Trust or any portion thereof in any such jurisdiction) shall be exercised and performed by such separate trustee or co-trustee at
the direction of the Trustee or the Delaware Trustee, as applicable.


Any notice, request or other writing given to the Trustee or the Delaware Trustee shall be
deemed to have been given to each of the then related separate trustee(s) and co-trustee(s), as effectively as if given to each of
them. Every instrument appointing any separate trustee(s) or co-trustee(s) shall refer to this Agreement and the conditions of this
Article VIII. Each separate trustee and co-trustee, upon its acceptance of the trusts conferred, shall be vested with the estates
or property specified in its instrument of appointment, either jointly with the Trustee or the Delaware Trustee, as applicable, or
separately, as may be provided therein, subject to all the provisions of this Agreement, specifically including every provision of
this Agreement relating to the conduct of, affecting the liability of, or affording protection to, the Trustee or the Delaware
Trustee, as applicable. Every such instrument shall be filed with the Trustee or the Delaware Trustee, as applicable.


Any separate trustee or co-trustee may, at any time, constitute the Trustee or the
Delaware Trustee, as applicable, its agent or attorney-in-fact, with full power and authority, to the extent not prohibited by law,
to do any lawful act under or in respect of this Agreement on its behalf and in its name. If any separate trustee or co-trustee
shall die, become incapable of acting, resign or be removed, all of its estates, properties, rights, remedies and the trust shall
vest in and be exercised by the Trustee or the Delaware Trustee, as applicable, to the extent permitted by law, without the
appointment of a new or successor trustee.


Section 8.11.        Authenticating Agents. The Trustee may
appoint one or more Authenticating Agents which shall be authorized to act on behalf of the Trustee in authenticating Certificates.
Wherever reference is made in this Agreement to the authentication of Certificates by the Trustee or the Trustee’s
certificate of authentication, such reference shall be deemed to include authentication on behalf of the Trustee by an
Authenticating Agent and a certificate of authentication executed on behalf of the Trustee by an Authenticating Agent. Each
Authenticating Agent must be acceptable to the Servicer and must be a corporation, trust company or banking association organized
and doing business under the laws of the United States of America or of any state, having an office and place of business in New
York, New York, having a combined capital and surplus of at least $15,000,000, authorized under such laws to do a trust business
and subject to supervision or examination by federal or state authorities.


Any corporation into which any Authenticating Agent may be merged or converted or with
which it may be consolidated, or any corporation resulting from any merger, conversion or consolidation to which any Authenticating
Agent shall be a party, or any corporation succeeding to the corporate agency business of any Authenticating Agent, shall continue
to be the Authenticating Agent so long as it shall be eligible in accordance with the provisions of the first paragraph of this
Section 8.11 without the execution or filing of any paper or any further act on the part of the Trustee or the Authenticating
Agent.


Any Authenticating Agent may at any time resign by giving written notice of resignation to
the Trustee and the Servicer. The Trustee may, upon prior written approval of the Servicer, at any time terminate the agency of any
Authenticating Agent by giving written notice of termination to such Authenticating Agent and to the Servicer. Upon receiving a
notice of resignation or upon such a termination, or in case at any time any Authenticating Agent shall cease to be eligible in
accordance with the provisions of the first paragraph of this Section 8.11, the Trustee may appoint, upon prior written approval of
the Servicer, a successor Authenticating Agent, shall give written notice of such appointment to the Servicer and shall mail notice
of such appointment to all Certificateholders. Any successor Authenticating Agent upon acceptance of its appointment hereunder
shall become vested with all the rights, powers, duties and responsibilities of its predecessor hereunder, with like effect as if
originally named as Authenticating Agent. Any reasonable compensation paid to an Authenticating Agent shall be a reimbursable
expense pursuant to Section 8.05 if paid by the Trustee.


Section 8.12.        Paying Agents. The Trustee may appoint one
or more Paying Agents which shall be authorized to act on behalf of the Trustee in making withdrawals from the Certificate Account,
and distributions to Certificateholders as provided in Section 4.01, Section 4.04(a) and Section 9.01(b) to the extent directed to
do so by the Servicer. Wherever reference is made in this Agreement to the withdrawal from the Certificate Account by the Trustee,
such reference shall be deemed to include such a withdrawal on behalf of the Trustee by a Paying Agent. Whenever reference is made
in this Agreement to a distribution by the Trustee or the furnishing of a statement to Certificateholders by the Trustee, such
reference shall be deemed to include such a distribution or furnishing on behalf of the Trustee by a Paying Agent. Each Paying
Agent shall provide to the Trustee such information concerning the Certificate Account as the Trustee shall request from time to
time. Each Paying Agent must be reasonably acceptable to the Servicer and must be a corporation, trust company or banking
association organized and doing business under the laws of the United States of America or of any state, having an office and place
of business in New York, New York, having a combined capital and surplus of at least $15,000,000, authorized under such laws to do
a trust business and subject to supervision or examination by federal or state authorities.


Any corporation into which any Paying Agent may be merged or converted or with which it
may be consolidated, or any corporation resulting from any merger, conversion or consolidation to which any Paying Agent shall be a
party, or any corporation succeeding to the corporate agency business of any Paying Agent, shall continue to be the Paying Agent
provided that such corporation after the consummation of such merger, conversion, consolidation or succession meets the eligibility
requirements of this Section 8.12.


Any Paying Agent may at any time resign by giving written notice of resignation to the
Trustee and to the Servicer; provided, that the Paying Agent has returned to the Certificate Account or otherwise accounted, to the
reasonable satisfaction of the Servicer, for all amounts it has withdrawn from the Certificate Account. The Trustee may, upon prior
written approval of the Servicer, at any time terminate the agency of any Paying Agent by giving written notice of termination to
such Paying Agent and to the Servicer. Upon receiving a notice of resignation or upon such a termination, or in case at any time
any Paying Agent shall cease to be eligible in accordance with the provisions of the first paragraph of this Section 8.12, the
Trustee may appoint, upon prior written approval of the Servicer, a successor Paying Agent, shall give written notice of such
appointment to the Servicer and shall mail notice of such appointment to all Certificateholders. Any successor Paying Agent upon
acceptance of its appointment hereunder shall become vested with all the rights, powers, duties and responsibilities of its
predecessor hereunder, with like effect as if originally named as Paying Agent. Any reasonable compensation paid to any Paying
Agent shall be a reimbursable expense pursuant to Section 8.05 if paid by the Trustee.


Section 8.13.        Duties of Delaware Trustee.


(a)        The Delaware Trustee is appointed to serve
as the trustee of the Trust in the State of Delaware for the sole purpose of satisfying the requirement of Section 3807(a) of the
Statutory Trust Statute that the Trust have at least one trustee with a principal place of business in Delaware.  It is
understood and agreed by the parties hereto that the Delaware Trustee shall have none of the duties or liabilities of the
Trustee.


(b)        The duties of the Delaware Trustee shall be
limited to (i) accepting legal process served on the Trust in the State of Delaware, (ii) the execution of any certificates with
respect to the Trust required to be filed with the Secretary of State which the Delaware Trustee is required to execute under
Section 3811 of the Statutory Trust Statute and (iii) such other duties as are set forth in this Article VIII.  To the extent
that, at law or in equity, the Delaware Trustee has duties (including fiduciary duties) and liabilities relating thereto to the
Trust or the Holders of the REMIC I Regular Interests or the Certificates, it is hereby understood and agreed by the parties hereto
that such duties and liabilities are replaced by the duties and liabilities of the Delaware Trustee expressly set forth in this
Agreement.


Section 8.14.        Amendment to Certificate of Trust. If at any
time required by Section 3810 of the Statutory Trust Statute, the Trustee, the Delaware Trustee and any other trustee of the Trust
shall cause an amendment to the Certificate of Trust to be filed with the Secretary of State in accordance with the provisions of
such Section 3810.


Section 8.15.        Limitation of Liability. It is expressly
understood and agreed by the parties hereto that (a) each of the representations, undertakings and agreements herein made on the
part of the Trust is made and intended not as personal representations, undertakings and agreements by the Trustee but is made and
intended for the purpose of binding only the Trust and (b) under no circumstances shall the Trustee be personally liable for the
payment of any indebtedness or expenses of the Trust or be liable for the breach or failure of any obligation, representation,
warranty or covenant made or undertaken by the Trust under this Agreement.


Section 8.16.        Yield Maintenance Agreements. The Trust
shall have the power and authority, and the Trustee is hereby authorized and directed, to (i) enter into and perform the
obligations of the Trust under each Yield Maintenance Agreement and (ii) exercise and enforce the rights of the Trust as specified
therein.


ARTICLE IX




Termination


Section 9.01.        Termination Upon Purchase by the Servicer or
Liquidation of All Mortgage Loans.


(a)        Except as otherwise set forth in this
Article IX, including, without limitation, the obligation of the Servicer to make payments to Certificateholders as hereafter set
forth, the Trust and the respective obligations and responsibilities of the Company, the Servicer, the Trustee and the Delaware
Trustee created hereby shall terminate in accordance with Section 3808 of the Statutory Trust Statute upon (i) the purchase by the
Servicer pursuant to the following paragraph of this Section 9.01(a) of all Mortgage Loans (other than Liquidated Mortgage Loans),
all property acquired in respect of any Mortgage Loan remaining in the Trust and all other property included in any REMIC formed
under this Agreement at a price equal, after the deduction of related advances, to the sum of (x) the excess of (A) 100% of the
aggregate outstanding Principal Balance of such Mortgage Loans (other than Liquidated Mortgage Loans) plus accrued interest at the
applicable Pass-Through Rate with respect to such Mortgage Loan (other than a Liquidated Mortgage Loan) through the last day of the
month of such purchase, over (B) with respect to any Mortgage Loan which is not a Liquidated Mortgage Loan, the amount of the
Bankruptcy Loss incurred with respect to such Mortgage Loan as of the date of such purchase by the Servicer to the extent that the
Principal Balance of such Mortgage Loan has not been previously reduced by such Bankruptcy Loss, and (y) without duplication, the
appraised fair market value as of the effective date of the termination of the Trust of (A) all property in the Trust which secured
a Mortgage Loan and which was acquired by foreclosure or deed in lieu of foreclosure after the Cut-Off Date, including related
Insurance Proceeds, and (B) all other property included in any REMIC formed under this Agreement, any such appraisal to be
conducted by an appraiser mutually agreed upon by the Servicer and the Trustee, less the sum of all unreimbursed advances made by
the Servicer pursuant to this Agreement, other than advances made with respect to Mortgage Loans as to which the Servicer expects
at the time of such purchase, in its sole judgment, that foreclosure is not imminent, or (ii) the later of the final payment or
other liquidation (or any advance with respect thereto) of the last Mortgage Loan remaining in the Trust or the disposition of all
property acquired upon foreclosure in respect of any Mortgage Loan, and the payment to the Certificateholders of all amounts
required to be paid to them hereunder; provided, however, that in no event shall the Trust continue beyond the expiration of 21
years from the death of the survivor of the issue of Joseph P. Kennedy, the late ambassador of the United States to the Court of
St. James’, living on the date hereof. The Servicer shall not have any further right to reimbursement by the Trust for any
advance that is used to reduce the purchase price of the Mortgage Loans pursuant to the immediately preceding sentence.


On any Distribution Date after the first date on which the aggregate Principal Balance of
the Mortgage Loans is less than the Clean-Up Call Percentage of the aggregate Principal Balance of the Mortgage Loans as of the
Cut-Off Date, the Servicer may purchase the outstanding Mortgage Loans (other than Liquidated Mortgage Loans), all property
acquired in respect of any Mortgage Loan remaining in the Trust and all other property included in any REMIC formed under this
Agreement at the price stated in clause (i) of the preceding paragraph; provided, that the Servicer may not so
purchase the outstanding Mortgage Loans (other than Liquidated Mortgage Loans), all property acquired in respect of any Mortgage
Loan remaining in the Trust and all other property included in any REMIC formed under this Agreement if the price stated in
clause (i) of the preceding paragraph exceeds the fair market value, determined in accordance with prudent industry practices, of
all outstanding Mortgage Loans (other than Liquidated Mortgage Loans), all property acquired in respect of any Mortgage Loan
remaining in the Trust and all other property included in any REMIC formed under this Agreement. If
such right is exercised, the Servicer shall provide to the Trustee and the Company, the written certification of an officer of the
Servicer (which certification shall include a statement to the effect that all amounts required to be paid in order to purchase the
Mortgage Loans have been deposited in the Certificate Account) and the Trustee on behalf of the Trust shall promptly execute all
instruments as may be necessary to release and assign to the Servicer the Mortgage Loans (other than Liquidated
Mortgage Loans), all property acquired in respect of any Mortgage Loan remaining in the Trust and all other property included in
any REMIC formed under this Agreement.


In no event shall the Servicer be required to expend any amounts other than those
described in the first paragraph of this Section 9.01(a) in order to terminate the Trust or purchase the Mortgage Loans under this
Section 9.01, and in no event shall the Company be required to expend any amounts in connection with such termination or
purchase.


(b)        Notice of any termination, specifying the
date upon which the Certificateholders may surrender their Certificates to the Trustee for payment and cancellation, shall be given
promptly by letter from the Trustee to Certificateholders mailed not less than 30 days prior to such final distribution, specifying
(i) the date upon which final payment of the Certificates will be made upon presentation and surrender of Certificates at the
office of the Certificate Registrar therein designated (the “Termination Date”), (ii) the amount of such final
payment (the “Termination Payment”) and (iii) that the Record Date otherwise applicable to the Distribution Date
upon which the Termination Date occurs is not applicable, payments being made only upon presentation and surrender of the
Certificates at the office of the Certificate Registrar therein specified. Upon any such notice, the Certificate Account shall
terminate subject to the Servicer’s obligation to hold all amounts payable to Certificateholders in trust without interest
pending such payment. The Servicer shall provide the Trustee with written notice of its intent to terminate the Trust upon purchase
at least five Business Days, or such lesser time as is acceptable to the Trustee, such acceptance not to be unreasonably withheld,
prior to the time that the Trustee is required to mail notice to the Certificateholders.


In the event that all of the Certificateholders shall not surrender their Certificates for
cancellation within six months after the Termination Date, the Servicer shall give a second written notice to the remaining
Certificateholders to surrender their Certificates for cancellation and receive the Termination Payment with respect thereto. If
within one year after the second notice all the Certificates shall not have been surrendered for cancellation, the Servicer may
take appropriate steps to contact the remaining Certificateholders concerning surrender of their Certificates, and the cost thereof
shall be paid out of the funds and other assets which remain in trust hereunder.


Upon the completion of winding up of the Trust, including the payment or the making
reasonable provision for payment of all obligations of the Trust in accordance with Section 3808(e) of the Statutory Trust Statute,
the Delaware Trustee shall prepare, the Trustee, the Delaware Trustee and any other trustee hereunder shall sign, and the Delaware
Trustee (upon the Trustee’s consent acting at the direction of the Servicer) shall file, a certificate of cancellation with
the Secretary of State in accordance with Section 3810 of the Statutory Trust Statute, at which time the Trust and this Agreement
shall terminate.  The Servicer shall act as the liquidator of the Trust and shall be responsible for taking all actions in
connection with winding up the Trust, in accordance with the requirements of this Agreement (including this Section 9.01 and
Section 9.02) and applicable law.


Section 9.02.        Additional Termination Requirements.


(a)        In the event the Servicer exercises its
purchase option as provided in Section 9.01, REMIC I and REMIC II shall be terminated in accordance with the following additional
requirements, unless the Servicer, at its own expense, obtains for the Trustee an Opinion of Counsel to the effect that the failure
of REMIC I and REMIC II to comply with the requirements of this Section 9.02 will not (i) result in the imposition of taxes on
“prohibited transactions” of REMIC I and REMIC II as described in Section 860F of the Code, or (ii) cause REMIC I or
REMIC II to fail to qualify as a REMIC at any time that any Certificates are outstanding:


(i)                  Within 90 days
prior to the final Distribution Date set forth in the notice given by the Trustee under Section 9.01, the Tax Matters Person shall
prepare the documentation required and the Tax Matters Person and the Trustee shall adopt a plan of complete liquidation on behalf
of REMIC I and REMIC II meeting the requirements of a qualified liquidation under Section 860F of the Code and any regulations
thereunder, as evidenced by an Opinion of Counsel obtained at the expense of the Servicer, on behalf of REMIC I and REMIC II;
and


(ii)                At or after the time of
adoption of such a plan of complete liquidation and at or prior to the final Distribution Date, the Servicer as agent of the Trust
shall sell all of the assets of REMIC I and REMIC II to the Servicer for cash in the amount specified in Section 9.01.


(b)        By its acceptance of any Residual
Certificate, the Holder thereof hereby agrees to authorize the Tax Matters Person and the Trustee to adopt such a plan of complete
liquidation upon the written request of the Tax Matters Person and the Trustee and to take such other action in connection
therewith as may be reasonably requested by the Tax Matters Person or the Trustee.


Section 9.03.        Trust Irrevocable. Except as expressly
provided herein, the trust created hereby is irrevocable.


ARTICLE X



Miscellaneous Provisions


Section 10.01.   
Amendment.


(a)        This Agreement may be amended from time to
time by the Servicer, the Company and the Trustee, without the consent of any of the Certificateholders:


(i)                  to cure any
ambiguity;


(ii)                to correct or supplement any
provision herein which may be defective or inconsistent with any other provisions herein;


(iii)               to comply with any requirements
imposed by the Code or any regulations thereunder;


(iv)              to correct the description of any
property at any time included in REMIC I or REMIC II, or to assure the conveyance to the Trust of any property included in REMIC I
or REMIC II;


(v)                pursuant to Section
5.01(c)(v); and


(vi)              to add any provision to, or amend any
provision in, this Agreement, provided that such amendment or addition does not adversely affect in any material respect the
interests of any Certificateholder;


provided, however, that any such amendment which modifies the rights or
obligations of the Delaware Trustee hereunder shall require the consent of the Delaware Trustee. No such amendment (other than one
entered into pursuant to clause (iii) of the preceding sentence) shall change the powers of the Servicer. Prior to entering into
any amendment (other than one entered into pursuant to clause (iii) of the second preceding sentence) without the consent of
Certificateholders pursuant to this paragraph, the Trustee shall require an Opinion of Counsel addressed to the Trust and the
Trustee to the effect that such amendment is permitted under this Agreement and has no material adverse effect on the interests of
the Certificateholders; provided, however, that no such Opinion of Counsel shall be required if the Company obtains a letter
from each Rating Agency stating that the amendment would not result in the downgrading or withdrawal of the respective ratings then
assigned to the Certificates. Prior to entering into any amendment pursuant to clause (iii) of the third preceding sentence without
the consent of Certificateholders pursuant to this paragraph, the Trustee shall require an Opinion of Counsel to the effect that
such action is necessary or helpful to comply with the requirements imposed by the Code or any regulations thereunder and shall not
cause any REMIC formed under this Agreement to fail to qualify as such under the Code.  The cost of any opinion required by
this Section 10.01 shall be borne by the party requesting such amendment.


(b)        This Agreement may also be amended from time
to time by the Servicer, the Company and the Trustee with the consent of the Holders of Certificates evidencing Percentage
Interests aggregating not less than 66% of REMIC II, for the purpose of adding any provisions to, or changing in any manner or
eliminating any of the provisions of, this Agreement or of modifying in any manner the rights of the Certificateholders;
provided, however, that no such amendment shall, without the consent of the Holder of each Certificate affected thereby (i)
reduce in any manner the amount of, or delay the timing of, distributions of principal or interest required to be made hereunder or
reduce the Certificateholder’s Percentage Interest, the Certificate Interest Rate or the Termination Payment with respect to
any of the Certificates, (ii) reduce the percentage of Percentage Interests specified in this Section 10.01 which are required to
amend this Agreement, (iii) create or permit the creation of any lien against any part of REMIC I or REMIC II, or (iv) modify any
provision in any way which would permit an earlier retirement of the Certificates; provided, further, that any such
amendment which modifies the rights or obligations of the Delaware Trustee hereunder shall require the consent of the Delaware
Trustee.


Promptly after the execution of any such amendment, the Trustee shall furnish written
notification of the substance of such amendment to the Delaware Trustee and each Certificateholder. Any failure to provide such
notice, or any defect therein, shall not, however, in any way impair or affect the validity of any such amendment.


It shall not be necessary for the consent of Certificateholders under this Section 10.01
to approve the particular form of any proposed amendment, but it shall be sufficient if such consent shall approve the substance
thereof. The manner of obtaining such consents and of evidencing the authorization of the execution thereof by Certificateholders
shall be subject to such reasonable regulations as the Trustee may prescribe.


Section 10.02.   
Recordation of Agreement. To the extent permitted by applicable law, this Agreement is subject to
recordation in all appropriate public offices for real property records in all the counties or the comparable jurisdictions in
which any Mortgaged Property is situated, and in any other appropriate public recording office or elsewhere, such recordation to be
effected by the Company and at its expense on direction by the Trustee, but only upon direction accompanied by an Opinion of
Counsel to the effect that such recordation materially and beneficially affects the interests of the Certificateholders. 


Section 10.03.   
Limitation on Rights of Certificateholders. The death or incapacity of any Certificateholder shall
not operate to terminate this Agreement or the Trust, nor entitle such Certificateholder’s legal representatives or heirs to
claim an accounting or to take any action or proceeding in any court for a partition or winding-up of the Trust, nor otherwise
affect the rights, obligations and liabilities of the parties hereto or any of them.


No Certificateholder shall have any right to vote or in any manner otherwise to control
the operation and management of the Trust or the obligations of the parties hereto (except as provided in Section 5.09, Section
7.01, Section 8.01, Section 8.02, Section 8.07, Section 10.01 and this Section 10.03), nor shall anything herein set forth, or
contained in the terms of the Certificates, be construed so as to constitute the Certificateholders from time to time as partners
or members of an association; nor shall any Certificateholder be under any liability to any third person by reason of any action
taken by the parties to this Agreement pursuant to any provision hereof.


No Certificateholder shall have any right by virtue or by availing of any provision of
this Agreement to institute any suit, action or proceeding in equity or at law upon or under or with respect to this Agreement,
unless such Holder previously shall have given to the Trustee a written notice of default and of the continuance thereof, as
hereinbefore provided, and unless also the Holders of Certificates evidencing Percentage Interests aggregating not less than 25% of
REMIC II shall have made written request upon the Trustee to institute such action, suit or proceeding in its own name as Trustee
hereunder and shall have offered to the Trustee such reasonable indemnity as it may require against the costs, expenses and
liabilities to be incurred therein or thereby, and the Trustee, for 60 days after its receipt of such notice, request and offer of
indemnity, shall have neglected or refused to institute any such action, suit or proceeding. However, the Trustee is under no
obligation to exercise any of the extraordinary trusts or powers vested in it by this Agreement or to make any investigation of
matters arising hereunder or to institute, conduct or defend any litigation hereunder or in relation hereto at the request, order
or direction of any of the Certificateholders unless such Certificateholders have offered to the Trustee reasonable security or
indemnity against the costs, expenses and liabilities which may be incurred therein or thereby. It is understood and intended, and
expressly covenanted by each Certificateholder with every other Certificateholder and the Trustee, that no one or more Holders of
Certificates shall have any right in any manner whatever by virtue or by availing of any provision of this Agreement to affect,
disturb or prejudice the rights of the Holders of any other of such Certificates, or to obtain or seek to obtain priority over or
preference to any other such Holder, or to enforce any right under this Agreement, except in the manner herein provided and for the
equal, ratable and common benefit of all Certificateholders. For the protection and enforcement of the provisions of this Section
10.03, each and every Certificateholder and the Trustee shall be entitled to such relief as can be given either at law or in
equity.


Section 10.04.   
Access to List of Certificateholders. The Certificate Registrar shall furnish or cause to be
furnished to the Trustee, within 30 days after receipt of a request by the Trustee in writing, a list, in such form as the Trustee
may reasonably require, of the names and addresses of the Certificateholders as of the most recent Record Date for payment of
distributions to such Certificateholders.


If three or more Certificateholders (hereinafter referred to as
“applicants”) apply in writing to the Trustee, and such application states that the applicants desire to
communicate with other Certificateholders with respect to their rights under this Agreement or under the Certificates and is
accompanied by a copy of the communication which such applicants propose to transmit, then the Trustee shall, within five Business
Days after the receipt of such list from the Certificate Registrar, afford such applicants access during normal business hours to
the most recent list of Certificateholders held by the Trustee. If such a list is as of a date more than 90 days prior to the date
of receipt of such applicants’ request, the Trustee shall promptly request from the Certificate Registrar a current list as
provided above, and shall afford such applicants access to such list promptly upon receipt.


Every Certificateholder, by receiving and holding the same, agrees with the Servicer, the
Trust, the Trustee and the Delaware Trustee that none of the Servicer, the Trust, the Trustee or the Delaware Trustee shall be held
accountable by reason of the disclosure of any such information as to the names and addresses of the Certificateholders hereunder,
regardless of the source from which such information was derived.


Section 10.05.   
Governing Law. This Agreement shall be construed in accordance with the laws of the State of
Delaware without giving effect to its conflict of laws provisions and the obligations, rights and remedies of the parties hereunder
shall be determined in accordance with such laws without giving effect to conflict of laws provisions.


Section 10.06.   
Notices. All demands, notices and communications hereunder shall be in writing and shall be deemed
to have been duly given if personally delivered at or mailed by registered or certified mail or overnight courier to the applicable
Notice Address. Notices to the Rating Agencies shall also be deemed to have been duly given if mailed by first class mail, postage
prepaid, to the above listed addresses of the Rating Agencies. Any notice required or permitted to be mailed to a Certificateholder
shall be given by first class mail, postage prepaid, at the address of such Holder as shown in the Certificate Register. Any notice
so mailed within the time prescribed in this Agreement shall be conclusively presumed to have been duly given, whether or not the
Certificateholder receives such notice.


Section 10.07.   
Severability of Provisions. If any one or more of the covenants, agreements, provisions or terms
of this Agreement shall be for any reason whatsoever held invalid, then such covenants, agreements, provisions or terms shall be
deemed severable from the remaining covenants, agreements, provisions or terms of this Agreement and shall in no way affect the
validity or enforceability of the other provisions of this Agreement or of the Certificates or the rights of the Holders
thereof.


Section 10.08.   
Counterpart Signatures. For the purpose of facilitating the recordation of this Agreement as
herein provided and for other purposes, this Agreement may be executed simultaneously in any number of counterparts, each of which
counterparts shall be deemed to be an original, and such counterparts shall constitute but one and the same instrument.


Section 10.09.   
Benefits of Agreement. Nothing in this Agreement or in any Certificate, expressed or implied,
shall give to any Person, other than the parties hereto and their respective successors hereunder, any separate trustee or
co-trustee appointed under Section 8.10 and the Certificateholders, any benefit or any legal or equitable right, remedy or claim
under this Agreement.


Section 10.10.   
Notices and Copies to Rating Agencies .


(a)        The Trustee shall notify the Rating Agencies
of the occurrence of any of the following events, in the manner provided in Section 10.06:


(i)                  the occurrence of
an Event of Default pursuant to Section 7.01, subject to the provisions of Section 8.01(d); and


(ii)                the appointment of a
successor Servicer pursuant to Section 7.02;


(b)        The Servicer shall notify the Rating
Agencies of the occurrence of any of the following events, or in the case of clauses (iii), (iv), (vii) and (viii) promptly upon
receiving notice thereof, in the manner provided in Section 10.06:


(i)                  any amendment of
this Agreement pursuant to Section 10.01;


(ii)                the appointment of a
successor Trustee or successor Delaware Trustee pursuant to Section 8.08;


(iii)               the filing of any claim under or
the cancellation or modification of any fidelity bond and errors and omissions coverage pursuant to Section 3.01 and Section 3.06
with respect to the Servicer;


(iv)              any change in the location of the
Certificate Account, any Custodial Account for P&I or any Custodial Account for Reserves;


(v)                the purchase of any Mortgage
Loan pursuant to a Purchase Obligation or as permitted by this Agreement or the purchase of the outstanding Mortgage Loans pursuant
to Section 9.01;


(vi)              the occurrence of the final Distribution
Date or the termination of the trust pursuant to Section 9.01(a)(ii);


(vii)             the failure of the Servicer to make a Monthly
P&I Advance following a determination on the Determination Date that the Servicer would make such advance pursuant to Section
4.02; and


(viii)           the failure of the Servicer to make a determination on the
Determination Date regarding whether it would make a Monthly P&I Advance when a shortfall exists between (x) payments scheduled
to be received in respect of the Mortgage Loans and (y) the amounts actually deposited in the Certificate Account on account of
such payments, pursuant to Section 4.02.


The Servicer shall provide copies of the statements pursuant to Section 4.02, Section
4.05, Section 3.12, Section 3.13 or Section 3.15 or any other statements or reports to the Rating Agencies in such time and manner
that such statements or determinations are required to be provided to Certificateholders. With respect to the reports described in
the second paragraph of Section 4.05, the Servicer shall provide such reports to the Rating Agencies in respect of each
Distribution Date, without regard to whether any Certificateholder or the Trustee or the Delaware Trustee has requested such report
for such Distribution Date.


 





IN WITNESS WHEREOF, the Company, the Servicer, the Trustee and the Delaware Trustee have
caused their names to be signed hereto by their respective officers, thereunto duly authorized, all as of the day and year first
above written.


 




	

WASHINGTON MUTUAL MORTGAGE SECURITIES
CORP.


	

By /s/ Thomas G. Lehmann


	

        Name:
Thomas G. Lehmann

         Title: First Vice President


	

WASHINGTON MUTUAL BANK,

known prior to April 4, 2005

as Washington Mutual Bank, FA,

as Servicer


	

By /s/ Val Meyer


	

        Name: Val Meyer

         Title: Assistant Vice President 


	
LASALLE BANK NATIONAL ASSOCIATION,


	

as Trustee


	

By: /s/ Rita C. Lopez


	

        Name: Rita C. Lopez

         Title: Assistant Vice President


	
CHRISTIANA BANK & TRUST COMPANY,


	

as Delaware
Trustee


	

By:  /s/ James M. Young


	

       
Name: James M. Young

         Title:  Assistant Vice President











 


[Signature page to Pooling and Servicing Agreement for Washington
Mutual WMALT Series 2005-1]






 



ACKNOWLEDGEMENT OF CORPORATION



STATE OF
WASHINGTON   )

                                                    )  SS.

COUNTY OF
KING                  )


I certify that I know or have satisfactory evidence that Thomas G.
Lehmann is the person who appeared before me, and said person acknowledged that he signed this instrument, on
oath stated that. he was authorized to execute the instrument and acknowledged it as the
First Vice President of WASHINGTON
MUTUAL MORTGAGE SECURITIES CORP., to be the free and voluntary act of such party for the uses and purposes mentioned
therein.



Dated this 26th day of April,
2005.



/s/ Chriselda Landon



Notary Public in and for the State of Washington,



residing at Seattle



My commission expires:  2-26-2007



 






ACKNOWLEDGEMENT



STATE OF
WASHINGTON   )

                                                    )  SS.

COUNTY OF
KING                  )


 


            I
certify that I know or have satisfactory evidence that Val M. Meyer is
the person who appeared before me, and said person acknowledged that said person signed this instrument, on oath stated that said
person was authorized to execute the instrument and acknowledged it as the Asst. Vice
President of Washington Mutual Bank, a federal
savings association, to be the free and voluntary act of such association for the uses and purposes mentioned in the
instrument.



Dated this 26th day of April,
2005.



/s/ Chriselda Landon



Notary Public in and for the State of Washington,



residing at Seattle



My commission expires:  2-26-2007


 


 

















STATE OF
ILLINOIS              )

                                                    )  SS.

COUNTY OF COOK               
)


 




On this ___ day of April 2005 before me, Ethel Franklin, a Notary Public in and for
said State, personally appeared Rita Lopez, known to me to be a Assistant
Vice President of LaSalle Bank N.A., one of the corporations that executed the
within instruement, and also known to me to be the person who executed it on
behalf of said corporation, and acknowledged to me that such corporation
executed the within instrument.



IN WITNESS WHEREOF, I have hereunto set my hand and
affixed my official seal the day and year in this certificate first above
written.



/s/ Ethel Franklin



My commission expires: 07/18/2005



[Notarial Seal]



 






 



ACKNOWLEDGEMENT



STATE OF DELAWARE         )

                                                     )  SS.

COUNTY OF NEWCASTLE    )


On this 19th day of April 2005 before me, a Notary Public in and for
said State, personally appeared James M. Young, personally known to me (or proved to me on the basis of satisfactory
evidence) to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacit(ies), and that by his/her/their signature(s) on the instrument the person(s),
or the entity upon behalf of which the person(s) acted, executed the instrument.



WITNESS my hand and
official seal.



Signature /s/ Matthew C. Stepnowksi


 



(SEAL)   Matthew C. Stepnowski

                               
Notary Public

                               
State of Delaware

                               
My Commission Expires Aug. 20, 2005

 



 






 







Exhibit A

CUSIP 939336 4Y 6


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 1-CB-1


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


WMALT Series
2005-3                                                                         
Portion of the Class 1-CB-1 Principal Balance as of the Cut-Off Date Evidenced
by this Certificate:

                                                                                                               
$39,748,000.00


Class 1-CB-1 Certificate Interest Rate:
5.500%


Cut-Off Date: April
1, 2005


First Distribution
Date: May 25, 2005


Last Scheduled
Distribution Date: May 25, 2035


Class 1-CB-1
Principal Balance

as of the Cut-Off Date: $39,748,000.00



Cede & Co.


Registered Owner






Exhibit A

CUSIP 939336 4Z 3


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 1-CB-2


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


The Class 1-CB-2 Certificates will provide credit support to another Class
of Certificates, as described in the Pooling Agreement.


Series
2005-3                                                                                         
Portion of the Class 1-CB-2 Principal Balance as of the Cut-Off Date Evidenced
by this Certificate:

                                                                                                               
$2,049,000.00


Class 1-CB-2 Certificate Interest Rate:
5.500%


Cut-Off Date: April
1, 2005


First Distribution
Date: May 25, 2005


Last Scheduled
Distribution Date: May 25, 2035


Class 1-CB-2
Principal Balance

as of the Cut-Off Date: $2,049,000.00



Cede & Co.


Registered Owner






Exhibit A

CUSIP 939336 5A 7


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 1-CB-3


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended, together with certain rights specified in the Pooling Agreement. The issue date of this
Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


Series
2005-3                                                                                         
Portion of the Class 1-CB-3 Principal Balance as of the Cut-Off Date Evidenced
by this Certificate:

                                                                                                               
$356,447,000.00


Class 1-CB-3 Certificate Interest Rate:
Variable


Cut-Off Date: April
1, 2005


First Distribution
Date: May 25, 2005


Last Scheduled
Distribution Date: May 25, 2035


Class 1-CB-3
Principal Balance

as of the Cut-Off Date: $356,447,000.00



Cede & Co.


Registered Owner






Exhibit A

CUSIP 939336 5B 5



 


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 1-CB-4


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


WMALT Series
2005-3                                                                         
Portion of the Class 1-CB-4 Notional Amount as of the Cut-Off Date Evidenced by
this Certificate:

                                                                                                               
$356,447,000.00


 



Class 1-CB-4 Certificate Interest Rate: Variable, applied to the Class 1-CB-4 Notional
Amount



Cut-Off Date: April 1, 2005



First Distribution Date: May 25, 2005



Last Scheduled Distribution Date: May 25, 2035



Class 1-CB-4 Principal Balance

as of the Cut-Off Date: $0.00


Class 1-CB-4
Notional Amount

as of the Cut-Off Date: $356,447,000.00



Cede & Co.


Registered Owner






Exhibit A

CUSIP 939336 5C 3


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 1-CB-5


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


 


WMALT Series
2005-3                                                                         
Portion of the Class 1-CB-5 Principal Balance as of the Cut-Off Date Evidenced
by this Certificate:

                                                                                                               
$10,953,000.00


Class 1-CB-5 Certificate Interest Rate:
5.500%


Cut-Off Date: April
1, 2005


First Distribution
Date: May 25, 2005


Last Scheduled
Distribution Date: May 25, 2035


Class 1-CB-5
Principal Balance

as of the Cut-Off Date: $10,953,000.00



Cede & Co.


Registered Owner


 







            Exhibit A

            CUSIP 939336 5D 1


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 1-CB-6


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


The Class 1-CB-6 Certificates will provide credit support to another Class
of Certificates, as described in the Pooling Agreement.


 


WMALT Series
2005-3                                                                         
Portion of the Class 1-CB-6 Principal Balance as of the Cut-Off Date Evidenced
by this Certificate:

                                                                                                               
$8,770,300.00


Class 1-CB-6 Certificate Interest Rate:
5.500%


Cut-Off Date: April
1, 2005


First Distribution
Date: May 25, 2005


Last Scheduled
Distribution Date: May 25, 2035


Class 1-CB-6
Principal Balance

as of the Cut-Off Date: $8,770,300.00



Cede & Co.


Registered Owner


 


 


 






       Exhibit
A

       CUSIP 939336 5E 9


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 2-A-1


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


WMALT Series
2005-3                                                                         
Portion of the Class 2-A-1 Principal Balance as of the Cut-Off Date Evidenced by
this Certificate:

                                                                                                               
$8,815,000.00


Class 2-A-1 Certificate Interest Rate:
5.500%


Cut-Off Date: April
1, 2005


First Distribution
Date: May 25, 2005


Last Scheduled
Distribution Date: May 25, 2035


Class 2-A-1
Principal Balance

as of the Cut-Off Date: $8,815,000.00



Cede & Co.


Registered Owner


 


 



 







           Exhibit A

           CUSIP 939336 5F 6


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 2-A-2


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended.  The issue date of this Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


WMALT Series
2005-3                                                                         
Portion of the Class 2-A-2 Principal Balance as of the Cut-Off Date Evidenced by
this Certificate:


                                                                                                               
$34,500,000.00


Class 2-A-2 Certificate Interest Rate:
Variable


Cut-Off Date: April
1, 2005


First Distribution
Date: May 25, 2005


Last Scheduled
Distribution Date: May 25, 2035


Class 2-A-2
Principal Balance

as of the Cut-Off Date: $34,500,000.00



Cede & Co.


Registered Owner






Exhibit A

CUSIP 939336 5G 4


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 2-A-3


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended, together with certain rights specified in the Pooling Agreement. The issue date of this
Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


WMALT Series
2005-3                                                                         
Portion of the Class 2-A-3 Principal Balance as of the Cut-Off Date Evidenced by
this Certificate:


                                                                                                               
$46,317,000.00



Class 2-A-3 Certificate Interest Rate: Variable



Cut-Off Date: April 1, 2005



First Distribution Date: May 25, 2005



Last Scheduled Distribution Date: May 25, 2035



Class 2-A-3 Principal Balance

as of the Cut-Off Date: $46,317,000.00



 



Cede & Co.


Registered Owner






Exhibit A

CUSIP 939336 5H 2


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 2-A-4


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


 


WMALT Series
2005-3                                                                         
Portion of the Class 2-A-4 Notional Amount as of the Cut-Off Date Evidenced by
this Certificate:


                                                                                                               
$46,317,000.00



 



Class 2-A-4 Certificate Interest Rate: Variable, applied to the Class 2-A-4 Notional
Amount


Cut-Off Date: April
1, 2005


First Distribution
Date: May 25, 2005


Last Scheduled
Distribution Date: May 25, 2035



Class 2-A-4 Principal Balance

as of the Cut-Off Date: $0.00


Class 2-A-4
Notional Amount

as of the Cut-Off Date: $46,317,000.00



 



Cede & Co.


Registered
Owner



 






Exhibit A

CUSIP 939336 5J 8


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 2-A-5


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


 


WMALT Series
2005-3                                                                         
Portion of the Class 2-A-5 Principal Balance as of
the Cut-Off Date Evidenced by this Certificate:


                                                                                                               
$2,614,000.00


Class 2-A-5 Certificate Interest Rate:
5.500%


Cut-Off Date: April
1, 2005


First Distribution
Date: May 25, 2005


Last Scheduled
Distribution Date: May 25, 2035


Class 2-A-5
Principal Balance: $2,614,000.00



Cede & Co.


Registered
Owner


 






Exhibit A

CUSIP 939336 5K 5


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class 2-A-6


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.


The Class 2-A-6 Certificates will provide credit support to another Class
of Certificates, as described in the Pooling Agreement.


WMALT Series
2005-3                                                                         
Portion of the Class 2-A-6 Principal Balance as of the Cut-Off Date Evidenced by
this Certificate:


                                                                                                               
$455,000.00


Class 2-A-6 Certificate Interest Rate:
5.500%


Cut-Off Date: April
1, 2005


First Distribution
Date: May 25, 2005


Last Scheduled
Distribution Date: May 25, 2035


Class 2-A-6
Principal Balance: $455,000.00



Cede & Co.


Registered
Owner


 



 






Exhibit A

CUSIP 939336 5L 3


WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATE


Class C-X


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer,
exchange, or payment, and any Certificate issued is registered in the name of Cede & Co. or such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an
authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
inasmuch as the registered owner hereof, Cede & Co., has an interest herein.



WMALT Series
2005-3                                                                         
Portion of the Class C-X Notional Amount as of the

Cut-Off Date Evidenced by this Certificate:

$32,241,010.00



Class C-X Certificate Interest Rate: 5.500% applied to the Class C-X Notional
Amount



Cut-Off Date: April 1, 2005



First Distribution Date: May 25, 2005



Last Scheduled Distribution Date: May 25, 2035



Class C-X Principal Balance

as of the Cut-Off Date: $0.00


Class C-X Notional
Amount

as of the Cut-Off Date: $32,241,010.00



Cede & Co.



Registered Owner


 






Exhibit A

CUSIP 939336 5M 1



 


WASHINGTON
MUTUAL MORTGAGE PASS-THROUGH CERTIFICATE


Class
C-P


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is
issued by Washington Mutual Mortgage Pass-Through Certificates WMALT Series 2005-3 Trust.  This Certificate represents
ownership of a “regular interest” in a “real estate mortgage investment conduit,” as those terms are
defined in Sections 860G and 860D, respectively, of the Internal Revenue Code of 1986, as amended. The issue date of this
Certificate is April 26, 2005. Interest is not payable with respect to this Certificate.


Unless this Certificate
is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to the
Company or its agent for registration of transfer, exchange, or payment, and any Certificate issued is registered in the name of
Cede & Co. or such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co.
or to such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE
OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest
herein.


WMALT
Series
2005-3                                                                         
Portion of the Class C-P Principal Balance as of
the Cut-Off Date Evidenced by this Certificate:   $2,059,478.00



Class C-P Certificate Interest Rate: 0.00%                                           


 


Cut-Off Date: April 1, 2005


 


First Distribution Date: May 25,
2005


 


Last Scheduled Distribution Date: May 25,
2035


 


Class C-P Principal Balance

as of the Cut-Off Date: $2,059,478.00


 


 



Cede & Co.



Registered Owner






Exhibit A

CUSIP 939336 5N 9


WASHINGTON
MUTUAL MORTGAGE PASS-THROUGH CERTIFICATE


Class
B-1


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate
is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to the
Company or its agent for registration of transfer, exchange, or payment, and any Certificate issued is registered in the name of
Cede & Co. or such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co.
or to such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE
OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest
herein.


NO TRANSFER OF THIS CLASS B-1
CERTIFICATE WILL BE MADE UNLESS THE TRUSTEE HAS RECEIVED (I) AN OFFICER’S CERTIFICATE IN THE FORM DESCRIBED IN SECTION
5.01(g) OF THE POOLING AGREEMENT AND (II) IF SO INDICATED IN SUCH OFFICER’S CERTIFICATE, AN OPINION OF COUNSEL ACCEPTABLE TO
AND IN FORM AND SUBSTANCE SATISFACTORY TO THE TRUSTEE AND THE COMPANY TO THE EFFECT THAT THE PURCHASE AND HOLDING OF THIS
CERTIFICATE ARE PERMISSIBLE UNDER APPLICABLE LAW, WILL NOT CONSTITUTE OR RESULT IN A NON-EXEMPT PROHIBITED TRANSACTION UNDER
SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE, AND WILL NOT SUBJECT THE TRUST, THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER
OR THE COMPANY TO ANY OBLIGATION OR LIABILITY (INCLUDING OBLIGATIONS OR LIABILITIES UNDER SECTION 406 OF ERISA OR SECTION 4975 OF
THE CODE) IN ADDITION TO THOSE UNDERTAKEN IN THE POOLING AGREEMENT, WHICH OPINION OF COUNSEL SHALL NOT BE AN EXPENSE OF THE TRUST,
THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER OR THE COMPANY.


NOTWITHSTANDING THE FOREGOING PARAGRAPH,
WITH RESPECT TO THE TRANSFER OF THIS CLASS B-1 CERTIFICATE TO DTC OR ANY OTHER CLEARING AGENCY OR ANY SUBSEQUENT TRANSFER OF ANY
INTEREST IN THIS CERTIFICATE FOR SO LONG AS THIS CERTIFICATE IS HELD BY DTC OR ANY OTHER CLEARING AGENCY, (I) AN OFFICER’S
CERTIFICATE (AND, IF APPLICABLE, A BENEFIT PLAN OPINION), AS DESCRIBED IN THE FOREGOING PARAGRAPH, SHALL NOT BE REQUIRED, AND (II)
THE FOLLOWING CONDITIONS SHALL APPLY:



1.             ANY TRANSFEREE OF THIS CERTIFICATE WILL BE DEEMED
TO HAVE REPRESENTED, BY VIRTUE OF ITS ACQUISITION OR HOLDING OF THIS CERTIFICATE (OR INTEREST HEREIN), THAT EITHER (A) SUCH
TRANSFEREE IS NOT AN EMPLOYEE BENEFIT OR OTHER PLAN SUBJECT TO THE PROHIBITED TRANSACTION PROVISIONS OF ERISA OR SECTION 4975 OF
THE CODE, OR ANY PERSON (INCLUDING AN INVESTMENT MANAGER, A NAMED FIDUCIARY OR A TRUSTEE OF ANY SUCH PLAN) ACTING, DIRECTLY OR
INDIRECTLY, ON BEHALF OF OR PURCHASING THIS CERTIFICATE WITH “PLAN ASSETS” OF ANY SUCH PLAN (A “PLAN
INVESTOR”), (B) SUCH TRANSFEREE IS AN INSURANCE COMPANY, THE SOURCE OF FUNDS TO BE USED BY IT TO ACQUIRE OR HOLD THIS
CERTIFICATE IS AN “INSURANCE COMPANY GENERAL ACCOUNT” (WITHIN THE MEANING OF DEPARTMENT OF LABOR PROHIBITED TRANSACTION
CLASS EXEMPTION (“PTCE”) 95-60), AND THE CONDITIONS IN SECTIONS I AND III OF PTCE 95-60 HAVE BEEN SATISFIED (EACH
ENTITY THAT SATISFIES THIS CLAUSE (B), A “COMPLYING INSURANCE COMPANY”) OR (C) THIS CERTIFICATE WAS RATED
“BBB-” OR BETTER (OR ITS EQUIVALENT) BY AT LEAST ONE OF THE RATING AGENCIES AT THE TIME OF SUCH TRANSFEREE’S
ACQUISITION OF THIS CERTIFICATE (OR INTEREST HEREIN); AND



2.             IF THIS CERTIFICATE (OR ANY INTEREST HEREIN) IS
ACQUIRED OR HELD IN VIOLATION OF THE PROVISIONS OF THE PRECEDING PARAGRAPH, THEN THE LAST PRECEDING TRANSFEREE THAT EITHER (I) IS
NOT A PLAN INVESTOR, (II) IS A COMPLYING INSURANCE COMPANY OR (III) ACQUIRED THIS CERTIFICATE AT A TIME WHEN THIS CERTIFICATE WAS
RATED “BBB-” OR BETTER (OR ITS EQUIVALENT) BY AT LEAST ONE OF THE RATING AGENCIES SHALL BE RESTORED, TO THE EXTENT
PERMITTED BY LAW, TO ALL RIGHTS AND OBLIGATIONS AS BENEFICIAL HOLDER THEREOF RETROACTIVE TO THE DATE OF TRANSFER OF THIS
CERTIFICATE BY SUCH PRECEDING TRANSFEREE.  NEITHER THE TRUST NOR THE TRUSTEE SHALL BE UNDER ANY LIABILITY TO ANY PERSON FOR
MAKING ANY PAYMENTS DUE ON THIS CERTIFICATE TO SUCH PRECEDING TRANSFEREE.


ANY PURPORTED BENEFICIAL HOLDER WHOSE
ACQUISITION OR HOLDING OF THIS CERTIFICATE (OR INTEREST HEREIN) WAS EFFECTED IN VIOLATION OF THE RESTRICTIONS IN SECTION 5.01(g) OF
THE POOLING AGREEMENT SHALL INDEMNIFY AND HOLD HARMLESS THE COMPANY, THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER, THE TRUST AND
THE UNDERWRITER FROM AND AGAINST ANY AND ALL LIABILITIES, CLAIMS, COSTS OR EXPENSES INCURRED BY SUCH PARTIES AS A RESULT OF SUCH
ACQUISITION OR HOLDING.


The Class B-1 Certificates will be subordinate
in right of payment to and provide credit support to certain Classes of Certificates, as described in the Pooling
Agreement.



WMALT Series
2005-3                                                                         
Portion of the Class B-1 Principal Balance as of the Cut-Off Date Evidenced by this Certificate:

$9,725,000.00



Class B-1 Certificate Interest Rate: 5.500%


Cut-Off Date: April 1, 2005


First Distribution Date: May 25,
2005


Last Scheduled Distribution Date: May 25,
2035


Class B-1
Principal Balance

as of the Cut-Off Date: $9,725,000.00



 



Cede & Co.



Registered Owner



 






Exhibit A

CUSIP 939336 5P 4


WASHINGTON
MUTUAL MORTGAGE PASS-THROUGH CERTIFICATE


Class
B-2


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate
is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to the
Company or its agent for registration of transfer, exchange, or payment, and any Certificate issued is registered in the name of
Cede & Co. or such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co.
or to such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE
OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest
herein.


NO TRANSFER OF THIS CLASS B-2
CERTIFICATE WILL BE MADE UNLESS THE TRUSTEE HAS RECEIVED (I) AN OFFICER’S CERTIFICATE IN THE FORM DESCRIBED IN SECTION
5.01(g) OF THE POOLING AGREEMENT AND (II) IF SO INDICATED IN SUCH OFFICER’S CERTIFICATE, AN OPINION OF COUNSEL ACCEPTABLE TO
AND IN FORM AND SUBSTANCE SATISFACTORY TO THE TRUSTEE AND THE COMPANY TO THE EFFECT THAT THE PURCHASE AND HOLDING OF THIS
CERTIFICATE ARE PERMISSIBLE UNDER APPLICABLE LAW, WILL NOT CONSTITUTE OR RESULT IN A NON-EXEMPT PROHIBITED TRANSACTION UNDER
SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE, AND WILL NOT SUBJECT THE TRUST, THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER
OR THE COMPANY TO ANY OBLIGATION OR LIABILITY (INCLUDING OBLIGATIONS OR LIABILITIES UNDER SECTION 406 OF ERISA OR SECTION 4975 OF
THE CODE) IN ADDITION TO THOSE UNDERTAKEN IN THE POOLING AGREEMENT, WHICH OPINION OF COUNSEL SHALL NOT BE AN EXPENSE OF THE TRUST,
THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER OR THE COMPANY.


NOTWITHSTANDING THE FOREGOING PARAGRAPH,
WITH RESPECT TO THE TRANSFER OF THIS CLASS B-2 CERTIFICATE TO DTC OR ANY OTHER CLEARING AGENCY OR ANY SUBSEQUENT TRANSFER OF ANY
INTEREST IN THIS CERTIFICATE FOR SO LONG AS THIS CERTIFICATE IS HELD BY DTC OR ANY OTHER CLEARING AGENCY, (I) AN OFFICER’S
CERTIFICATE (AND, IF APPLICABLE, A BENEFIT PLAN OPINION), AS DESCRIBED IN THE FOREGOING PARAGRAPH, SHALL NOT BE REQUIRED, AND (II)
THE FOLLOWING CONDITIONS SHALL APPLY:



1.             ANY TRANSFEREE OF THIS CERTIFICATE WILL BE DEEMED
TO HAVE REPRESENTED, BY VIRTUE OF ITS ACQUISITION OR HOLDING OF THIS CERTIFICATE (OR INTEREST HEREIN), THAT EITHER (A) SUCH
TRANSFEREE IS NOT AN EMPLOYEE BENEFIT OR OTHER PLAN SUBJECT TO THE PROHIBITED TRANSACTION PROVISIONS OF ERISA OR SECTION 4975 OF
THE CODE, OR ANY PERSON (INCLUDING AN INVESTMENT MANAGER, A NAMED FIDUCIARY OR A TRUSTEE OF ANY SUCH PLAN) ACTING, DIRECTLY OR
INDIRECTLY, ON BEHALF OF OR PURCHASING THIS CERTIFICATE WITH “PLAN ASSETS” OF ANY SUCH PLAN (A “PLAN
INVESTOR”), (B) SUCH TRANSFEREE IS AN INSURANCE COMPANY, THE SOURCE OF FUNDS TO BE USED BY IT TO ACQUIRE OR HOLD THIS
CERTIFICATE IS AN “INSURANCE COMPANY GENERAL ACCOUNT” (WITHIN THE MEANING OF DEPARTMENT OF LABOR PROHIBITED TRANSACTION
CLASS EXEMPTION (“PTCE”) 95-60), AND THE CONDITIONS IN SECTIONS I AND III OF PTCE 95-60 HAVE BEEN SATISFIED (EACH
ENTITY THAT SATISFIES THIS CLAUSE (B), A “COMPLYING INSURANCE COMPANY”) OR (C) THIS CERTIFICATE WAS RATED
“BBB-” OR BETTER (OR ITS EQUIVALENT) BY AT LEAST ONE OF THE RATING AGENCIES AT THE TIME OF SUCH TRANSFEREE’S
ACQUISITION OF THIS CERTIFICATE (OR INTEREST HEREIN); AND



2.             IF THIS CERTIFICATE (OR ANY INTEREST HEREIN) IS
ACQUIRED OR HELD IN VIOLATION OF THE PROVISIONS OF THE PRECEDING PARAGRAPH, THEN THE LAST PRECEDING TRANSFEREE THAT EITHER (I) IS
NOT A PLAN INVESTOR, (II) IS A COMPLYING INSURANCE COMPANY OR (III) ACQUIRED THIS CERTIFICATE AT A TIME WHEN THIS CERTIFICATE WAS
RATED “BBB-” OR BETTER (OR ITS EQUIVALENT) BY AT LEAST ONE OF THE RATING AGENCIES SHALL BE RESTORED, TO THE EXTENT
PERMITTED BY LAW, TO ALL RIGHTS AND OBLIGATIONS AS BENEFICIAL HOLDER THEREOF RETROACTIVE TO THE DATE OF TRANSFER OF THIS
CERTIFICATE BY SUCH PRECEDING TRANSFEREE.  NEITHER THE TRUST NOR THE TRUSTEE SHALL BE UNDER ANY LIABILITY TO ANY PERSON FOR
MAKING ANY PAYMENTS DUE ON THIS CERTIFICATE TO SUCH PRECEDING TRANSFEREE.


ANY PURPORTED BENEFICIAL HOLDER WHOSE
ACQUISITION OR HOLDING OF THIS CERTIFICATE (OR INTEREST HEREIN) WAS EFFECTED IN VIOLATION OF THE RESTRICTIONS IN SECTION 5.01(g) OF
THE POOLING AGREEMENT SHALL INDEMNIFY AND HOLD HARMLESS THE COMPANY, THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER, THE TRUST AND
THE UNDERWRITER FROM AND AGAINST ANY AND ALL LIABILITIES, CLAIMS, COSTS OR EXPENSES INCURRED BY SUCH PARTIES AS A RESULT OF SUCH
ACQUISITION OR HOLDING.


The Class B-2 Certificates will be subordinate
in right of payment to and provide credit support to certain Classes of Certificates, as described in the Pooling
Agreement.



WMALT Series
2005-3                                                                         
Portion of the Class B-2 Principal Balance as of the Cut-Off Date Evidenced by this Certificate:

$6,753,000.00



Class B-2 Certificate Interest Rate: 5.500%


Cut-Off Date: April 1, 2005


First Distribution Date: May 25,
2005


Last Scheduled Distribution Date: May 25,
2035


Class B-2
Principal Balance

as of the Cut-Off Date: $6,753,000.00



 



Cede & Co.



Registered Owner



 


 






Exhibit A

CUSIP 939336 5Q 2


WASHINGTON
MUTUAL MORTGAGE PASS-THROUGH CERTIFICATE


Class
B-3


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage Pass-Through
Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular interest” in a
“real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D, respectively, of the
Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


Unless this Certificate
is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to the
Company or its agent for registration of transfer, exchange, or payment, and any Certificate issued is registered in the name of
Cede & Co. or such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co.
or to such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE
OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest
herein.


NO TRANSFER OF THIS CLASS B-3
CERTIFICATE WILL BE MADE UNLESS THE TRUSTEE HAS RECEIVED (I) AN OFFICER’S CERTIFICATE IN THE FORM DESCRIBED IN SECTION
5.01(g) OF THE POOLING AGREEMENT AND (II) IF SO INDICATED IN SUCH OFFICER’S CERTIFICATE, AN OPINION OF COUNSEL ACCEPTABLE TO
AND IN FORM AND SUBSTANCE SATISFACTORY TO THE TRUSTEE AND THE COMPANY TO THE EFFECT THAT THE PURCHASE AND HOLDING OF THIS
CERTIFICATE ARE PERMISSIBLE UNDER APPLICABLE LAW, WILL NOT CONSTITUTE OR RESULT IN A NON-EXEMPT PROHIBITED TRANSACTION UNDER
SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE, AND WILL NOT SUBJECT THE TRUST, THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER
OR THE COMPANY TO ANY OBLIGATION OR LIABILITY (INCLUDING OBLIGATIONS OR LIABILITIES UNDER SECTION 406 OF ERISA OR SECTION 4975 OF
THE CODE) IN ADDITION TO THOSE UNDERTAKEN IN THE POOLING AGREEMENT, WHICH OPINION OF COUNSEL SHALL NOT BE AN EXPENSE OF THE TRUST,
THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER OR THE COMPANY.


NOTWITHSTANDING THE FOREGOING PARAGRAPH,
WITH RESPECT TO THE TRANSFER OF THIS CLASS B-3 CERTIFICATE TO DTC OR ANY OTHER CLEARING AGENCY OR ANY SUBSEQUENT TRANSFER OF ANY
INTEREST IN THIS CERTIFICATE FOR SO LONG AS THIS CERTIFICATE IS HELD BY DTC OR ANY OTHER CLEARING AGENCY, (I) AN OFFICER’S
CERTIFICATE (AND, IF APPLICABLE, A BENEFIT PLAN OPINION), AS DESCRIBED IN THE FOREGOING PARAGRAPH, SHALL NOT BE REQUIRED, AND (II)
THE FOLLOWING CONDITIONS SHALL APPLY:



1.             ANY TRANSFEREE OF THIS CERTIFICATE WILL BE DEEMED
TO HAVE REPRESENTED, BY VIRTUE OF ITS ACQUISITION OR HOLDING OF THIS CERTIFICATE (OR INTEREST HEREIN), THAT EITHER (A) SUCH
TRANSFEREE IS NOT AN EMPLOYEE BENEFIT OR OTHER PLAN SUBJECT TO THE PROHIBITED TRANSACTION PROVISIONS OF ERISA OR SECTION 4975 OF
THE CODE, OR ANY PERSON (INCLUDING AN INVESTMENT MANAGER, A NAMED FIDUCIARY OR A TRUSTEE OF ANY SUCH PLAN) ACTING, DIRECTLY OR
INDIRECTLY, ON BEHALF OF OR PURCHASING THIS CERTIFICATE WITH “PLAN ASSETS” OF ANY SUCH PLAN (A “PLAN
INVESTOR”), (B) SUCH TRANSFEREE IS AN INSURANCE COMPANY, THE SOURCE OF FUNDS TO BE USED BY IT TO ACQUIRE OR HOLD THIS
CERTIFICATE IS AN “INSURANCE COMPANY GENERAL ACCOUNT” (WITHIN THE MEANING OF DEPARTMENT OF LABOR PROHIBITED TRANSACTION
CLASS EXEMPTION (“PTCE”) 95-60), AND THE CONDITIONS IN SECTIONS I AND III OF PTCE 95-60 HAVE BEEN SATISFIED (EACH
ENTITY THAT SATISFIES THIS CLAUSE (B), A “COMPLYING INSURANCE COMPANY”) OR (C) THIS CERTIFICATE WAS RATED
“BBB-” OR BETTER (OR ITS EQUIVALENT) BY AT LEAST ONE OF THE RATING AGENCIES AT THE TIME OF SUCH TRANSFEREE’S
ACQUISITION OF THIS CERTIFICATE (OR INTEREST HEREIN); AND



2.             IF THIS CERTIFICATE (OR ANY INTEREST HEREIN) IS
ACQUIRED OR HELD IN VIOLATION OF THE PROVISIONS OF THE PRECEDING PARAGRAPH, THEN THE LAST PRECEDING TRANSFEREE THAT EITHER (I) IS
NOT A PLAN INVESTOR, (II) IS A COMPLYING INSURANCE COMPANY OR (III) ACQUIRED THIS CERTIFICATE AT A TIME WHEN THIS CERTIFICATE WAS
RATED “BBB-” OR BETTER (OR ITS EQUIVALENT) BY AT LEAST ONE OF THE RATING AGENCIES SHALL BE RESTORED, TO THE EXTENT
PERMITTED BY LAW, TO ALL RIGHTS AND OBLIGATIONS AS BENEFICIAL HOLDER THEREOF RETROACTIVE TO THE DATE OF TRANSFER OF THIS
CERTIFICATE BY SUCH PRECEDING TRANSFEREE.  NEITHER THE TRUST NOR THE TRUSTEE SHALL BE UNDER ANY LIABILITY TO ANY PERSON FOR
MAKING ANY PAYMENTS DUE ON THIS CERTIFICATE TO SUCH PRECEDING TRANSFEREE.


ANY PURPORTED BENEFICIAL HOLDER WHOSE
ACQUISITION OR HOLDING OF THIS CERTIFICATE (OR INTEREST HEREIN) WAS EFFECTED IN VIOLATION OF THE RESTRICTIONS IN SECTION 5.01(g) OF
THE POOLING AGREEMENT SHALL INDEMNIFY AND HOLD HARMLESS THE COMPANY, THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER, THE TRUST AND
THE UNDERWRITER FROM AND AGAINST ANY AND ALL LIABILITIES, CLAIMS, COSTS OR EXPENSES INCURRED BY SUCH PARTIES AS A RESULT OF SUCH
ACQUISITION OR HOLDING.


The Class B-3 Certificates will be subordinate
in right of payment to and provide credit support to certain Classes of Certificates, as described in the Pooling
Agreement.



WMALT Series
2005-3                                                                         
Portion of the Class B-3 Principal Balance as of the Cut-Off Date Evidenced by this Certificate:

$4,322,000.00



Class B-3 Certificate Interest Rate: 5.500%


Cut-Off Date: April 1, 2005


First Distribution Date: May 25,
2005


Last Scheduled Distribution Date: May 25,
2035


Class B-3
Principal Balance

as of the Cut-Off Date: $4,322,000.00



 



Cede & Co.



Registered Owner



 


 


 Exhibit A

CUSIP 939336 5S 8




WASHINGTON MUTUAL
MORTGAGE PASS-THROUGH CERTIFICATE


Class B-4


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage
Pass-Through Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular
interest” in a “real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D,
respectively, of the Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


NO TRANSFER OF THIS CLASS B-4
CERTIFICATE WILL BE MADE UNLESS THE TRUSTEE HAS RECEIVED (I) AN OFFICER’S CERTIFICATE IN THE FORM DESCRIBED IN SECTION
5.01(d) OF THE POOLING AGREEMENT AND (II) IF SO INDICATED IN SUCH OFFICER’S CERTIFICATE, AN OPINION OF COUNSEL ACCEPTABLE TO
AND IN FORM AND SUBSTANCE SATISFACTORY TO THE TRUSTEE AND THE COMPANY TO THE EFFECT THAT THE PURCHASE AND HOLDING OF THIS
CERTIFICATE ARE PERMISSIBLE UNDER APPLICABLE LAW, WILL NOT CONSTITUTE OR RESULT IN A NON-EXEMPT PROHIBITED TRANSACTION UNDER
SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE, AND WILL NOT SUBJECT THE TRUST, THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER
OR THE COMPANY TO ANY OBLIGATION OR LIABILITY (INCLUDING OBLIGATIONS OR LIABILITIES UNDER SECTION 406 OF ERISA OR SECTION 4975 OF
THE CODE) IN ADDITION TO THOSE UNDERTAKEN IN THE POOLING AGREEMENT, WHICH OPINION OF COUNSEL SHALL NOT BE AN EXPENSE OF THE TRUST,
THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER OR THE COMPANY.


THE SECURITIES REPRESENTED BY THIS
CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933. THESE SECURITIES MAY NOT BE OFFERED, SOLD, TRANSFERRED,
PLEDGED OR HYPOTHECATED IN THE ABSENCE OF REGISTRATION OR THE AVAILABILITY OF AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES
ACT OF 1933 AND EXCEPT IN ACCORDANCE WITH SECTION 5.01(e) OF THE POOLING AGREEMENT.


The Class B-4 Certificates will be subordinate in right of
payment to and provide credit support to certain Classes of Certificates, as described in the Pooling Agreement.


WMALT Series
2005-3                                                                         
Portion of the Class B-4 Principal Balance as of the Cut-Off Date Evidenced by this Certificate:


$3,241,000.00


Class B-4 Certificate Interest Rate:
5.500%


Cut-Off Date: April 1,
2005


First Distribution Date: May 25,
2005


Last Scheduled Distribution Date:
May 25, 2035


Class B-4
Principal Balance


as of the Cut-Off Date:
$3,241,000.00


Hare & Co.

Registered Owner


 


 


                                                                                                         






Exhibit A

CUSIP 939336 5T 6


WASHINGTON MUTUAL
MORTGAGE PASS-THROUGH CERTIFICATE


Class B-5


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage
Pass-Through Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular
interest” in a “real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D,
respectively, of the Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


NO TRANSFER OF THIS CLASS B-5
CERTIFICATE WILL BE MADE UNLESS THE TRUSTEE HAS RECEIVED (I) AN OFFICER’S CERTIFICATE IN THE FORM DESCRIBED IN SECTION
5.01(d) OF THE POOLING AGREEMENT AND (II) IF SO INDICATED IN SUCH OFFICER’S CERTIFICATE, AN OPINION OF COUNSEL ACCEPTABLE TO
AND IN FORM AND SUBSTANCE SATISFACTORY TO THE TRUSTEE AND THE COMPANY TO THE EFFECT THAT THE PURCHASE AND HOLDING OF THIS
CERTIFICATE ARE PERMISSIBLE UNDER APPLICABLE LAW, WILL NOT CONSTITUTE OR RESULT IN A NON-EXEMPT PROHIBITED TRANSACTION UNDER
SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE, AND WILL NOT SUBJECT THE TRUST, THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER
OR THE COMPANY TO ANY OBLIGATION OR LIABILITY (INCLUDING OBLIGATIONS OR LIABILITIES UNDER SECTION 406 OF ERISA OR SECTION 4975 OF
THE CODE) IN ADDITION TO THOSE UNDERTAKEN IN THE POOLING AGREEMENT, WHICH OPINION OF COUNSEL SHALL NOT BE AN EXPENSE OF THE TRUST,
THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER OR THE COMPANY.


THE SECURITIES REPRESENTED BY THIS
CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933. THESE SECURITIES MAY NOT BE OFFERED, SOLD, TRANSFERRED,
PLEDGED OR HYPOTHECATED IN THE ABSENCE OF REGISTRATION OR THE AVAILABILITY OF AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES
ACT OF 1933 AND EXCEPT IN ACCORDANCE WITH SECTION 5.01(e) OF THE POOLING AGREEMENT.


The Class B-5 Certificates will be subordinate in right of
payment to and provide credit support to certain Classes of Certificates, as described in the Pooling Agreement.


WMALT Series
2005-3                                                                         
Portion of the Class B-5 Principal Balance as of the Cut-Off Date Evidenced by this Certificate:


$2,161,000.00


Class B-5 Certificate Interest Rate:
5.500%


Cut-Off Date: April 1,
2005


First Distribution Date: May 25,
2005


Last Scheduled Distribution Date:
May 25, 2035


Class B-5
Principal Balance


as of the Cut-Off Date:
$2,161,000.00


Hare & Co.

Registered Owner


 



    


                                                                                                         


 






Exhibit A

CUSIP 939336 5U 3


WASHINGTON MUTUAL
MORTGAGE PASS-THROUGH CERTIFICATE


Class B-6


Evidencing a beneficial interest in a pool of assets consisting of
beneficial interests in another pool of assets consisting of, among other things, conventional one- to four-family mortgage loans
formed by


WASHINGTON MUTUAL MORTGAGE
SECURITIES CORP.


This Certificate is issued by Washington Mutual Mortgage
Pass-Through Certificates WMALT Series 2005-3 Trust.  This Certificate represents ownership of a “regular
interest” in a “real estate mortgage investment conduit,” as those terms are defined in Sections 860G and 860D,
respectively, of the Internal Revenue Code of 1986, as amended. The issue date of this Certificate is April 26, 2005.


NO TRANSFER OF THIS CLASS B-6
CERTIFICATE WILL BE MADE UNLESS THE TRUSTEE HAS RECEIVED (I) AN OFFICER’S CERTIFICATE IN THE FORM DESCRIBED IN SECTION
5.01(d) OF THE POOLING AGREEMENT AND (II) IF SO INDICATED IN SUCH OFFICER’S CERTIFICATE, AN OPINION OF COUNSEL ACCEPTABLE TO
AND IN FORM AND SUBSTANCE SATISFACTORY TO THE TRUSTEE AND THE COMPANY TO THE EFFECT THAT THE PURCHASE AND HOLDING OF THIS
CERTIFICATE ARE PERMISSIBLE UNDER APPLICABLE LAW, WILL NOT CONSTITUTE OR RESULT IN A NON-EXEMPT PROHIBITED TRANSACTION UNDER
SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE, AND WILL NOT SUBJECT THE TRUST, THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER
OR THE COMPANY TO ANY OBLIGATION OR LIABILITY (INCLUDING OBLIGATIONS OR LIABILITIES UNDER SECTION 406 OF ERISA OR SECTION 4975 OF
THE CODE) IN ADDITION TO THOSE UNDERTAKEN IN THE POOLING AGREEMENT, WHICH OPINION OF COUNSEL SHALL NOT BE AN EXPENSE OF THE TRUST,
THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER OR THE COMPANY.


THE SECURITIES REPRESENTED BY THIS
CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933. THESE SECURITIES MAY NOT BE OFFERED, SOLD, TRANSFERRED,
PLEDGED OR HYPOTHECATED IN THE ABSENCE OF REGISTRATION OR THE AVAILABILITY OF AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES
ACT OF 1933 AND EXCEPT IN ACCORDANCE WITH SECTION 5.01(e) OF THE POOLING AGREEMENT.


The Class B-6 Certificates will be subordinate in right of
payment to and provide credit support to certain Classes of Certificates, as described in the Pooling Agreement.


WMALT Series
2005-3                                                                         
Portion of the Class B-6 Principal Balance as of the Cut-Off Date Evidenced by this Certificate:


$1,352,626.17


 


Class B-6 Certificate Interest Rate:
5.500%


Cut-Off Date: April 1,
2005


First Distribution Date: May 25,
2005


Last Scheduled Distribution Date:
May 25, 2035


Class B-6
Principal Balance


as of the Cut-Off Date:
$1,352,626.17


Hare & Co.

Registered Owner


 


                                                                                                         


 



 









Exhibit B

CUSIP 939336 5R 0


WASHINGTON MUTUAL
MORTGAGE PASS-THROUGH CERTIFICATE


Class R


Evidencing a Percentage Interest in certain distributions with
respect to a pool of conventional one- to four-family mortgage loans formed by


WASHINGTON MUTUAL
MORTGAGE SECURITIES CORP.


ANY RESALE, TRANSFER OR OTHER DISPOSITION OF THIS CERTIFICATE
MAY BE MADE ONLY IF THE PROPOSED TRANSFEREE PROVIDES A TRANSFER AFFIDAVIT TO THE COMPANY AND THE TRUSTEE THAT (1) SUCH TRANSFEREE
IS NOT EITHER (A) THE UNITED STATES, ANY STATE OR POLITICAL SUBDIVISION THEREOF, ANY FOREIGN GOVERNMENT, ANY INTERNATIONAL
ORGANIZATION, OR ANY AGENCY OR INSTRUMENTALITY OF ANY OF THE FOREGOING, (B) ANY ORGANIZATION (OTHER THAN A COOPERATIVE DESCRIBED IN
SECTION 521 OF THE CODE) WHICH IS EXEMPT FROM THE TAX IMPOSED BY CHAPTER 1 OF THE CODE UNLESS SUCH ORGANIZATION IS SUBJECT TO THE
TAX IMPOSED BY SECTION 511 OF THE CODE, (C) ANY ORGANIZATION DESCRIBED IN SECTION 1381(a)(2)(C) OF THE CODE (ANY SUCH PERSON
DESCRIBED IN THE FOREGOING CLAUSES (A), (B), OR (C) BEING HEREINAFTER REFERRED TO AS A “DISQUALIFIED ORGANIZATION”), OR
(D) AN AGENT OF A DISQUALIFIED ORGANIZATION AND (2) NO PURPOSE OF SUCH TRANSFER IS TO ENABLE THE TRANSFER TO IMPEDE THE ASSESSMENT
OR COLLECTION OF TAX. SUCH AFFIDAVIT SHALL INCLUDE CERTAIN REPRESENTATIONS AS TO THE FINANCIAL CONDITION OF THE PROPOSED
TRANSFEREE. NOTWITHSTANDING THE REGISTRATION IN THE CERTIFICATE REGISTER OF ANY TRANSFER, SALE OR OTHER DISPOSITION OF THIS CLASS R
CERTIFICATE TO A DISQUALIFIED ORGANIZATION OR AN AGENT OF A DISQUALIFIED ORGANIZATION, SUCH REGISTRATION SHALL BE DEEMED TO BE OF
NO LEGAL FORCE OR EFFECT WHATSOEVER AND SUCH PERSON SHALL NOT BE DEEMED TO BE A CERTIFICATEHOLDER FOR ANY PURPOSE HEREUNDER,
INCLUDING, BUT NOT LIMITED TO, THE RECEIPT OF DISTRIBUTIONS ON THIS CERTIFICATE. EACH HOLDER OF A CLASS R CERTIFICATE BY ACCEPTANCE
OF THIS CERTIFICATE SHALL BE DEEMED TO HAVE CONSENTED TO THE PROVISIONS OF THIS PARAGRAPH.


IN THE CASE OF ANY CLASS R CERTIFICATE PRESENTED FOR
REGISTRATION IN THE NAME OF ANY PERSON, THE TRUSTEE SHALL REQUIRE (I) AN OFFICER’S CERTIFICATE IN THE FORM DESCRIBED IN
SECTION 5.01(d) OF THE POOLING AGREEMENT AND (II) IF SO INDICATED IN SUCH OFFICER’S CERTIFICATE, AN OPINION OF COUNSEL
ACCEPTABLE TO AND IN FORM AND SUBSTANCE SATISFACTORY TO THE TRUSTEE AND THE COMPANY TO THE EFFECT THAT THE PURCHASE AND HOLDING OF
A CLASS R CERTIFICATE ARE PERMISSIBLE UNDER APPLICABLE LAW, WILL NOT CONSTITUTE OR RESULT IN A NON-EXEMPT PROHIBITED TRANSACTION
UNDER SECTION 406 OF THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED (“ERISA”), OR SECTION 4975 OF THE
CODE AND WILL NOT SUBJECT THE TRUST, THE TRUSTEE, THE DELAWARE TRUSTEE, THE SERVICER OR THE COMPANY TO ANY OBLIGATION OR LIABILITY
(INCLUDING OBLIGATIONS OR LIABILITIES UNDER SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE) IN ADDITION TO THOSE UNDERTAKEN IN
THE POOLING AGREEMENT, WHICH OPINION OF COUNSEL SHALL NOT BE AN EXPENSE OF THE TRUST, THE TRUSTEE, THE DELAWARE TRUSTEE, THE
SERVICER OR THE COMPANY.


This Certificate is issued by Washington Mutual Mortgage
Pass-Through Certificates WMALT Series 2005-3 Trust.  Solely for U.S. federal income tax purposes, this Certificate represents
“residual interests” in “real estate mortgage investment conduits,” as those terms are defined in Sections
860G and 860D, respectively, of the Internal Revenue Code of 1986, as amended.


Series
2005-3                                                                                         
Percentage Interest evidenced by this Class R Certificate in the distributions to be made with respect to the Class R Certificates:
________%


Class R Certificate Interest Rate: 5.500%.  Additionally the Class R Certificates are entitled to Excess
Liquidation Proceeds and the Residual Distribution Amount as defined in the Pooling Agreement.


Cut-Off Date: April 1,
2005


First Distribution Date: May 25,
2005


Last Scheduled Distribution Date:
May 25, 2035


Class R Principal Balance as of the
Cut-Off Date: $100.00


__________________

Registered Owner


Certificate No.
_________







This Certificate does not represent an
obligation of or interest in Washington Mutual Mortgage Securities Corp. or any of its affiliates. Neither this Certificate nor the
underlying Mortgage Loans are guaranteed by any agency or instrumentality of the United States.



This certifies that the above-named
Registered Owner is the registered owner of certain interests in (i) a pool of assets (“REMIC I”) consisting of, among
other things, conventional one- to four-family mortgage loans (the “Mortgage Loans”), formed by Washington Mutual
Mortgage Securities Corp. (the “Company”), which term includes any successor entity under the Pooling Agreement
referred to below and (ii) a pool of assets (“REMIC II”) consisting of interests in REMIC I. REMIC I and REMIC II were
created pursuant to a Pooling and Servicing Agreement, dated as of the Cut-Off Date stated above (the “Pooling
Agreement”), among the Company, the Servicer, LaSalle Bank National Association, as Trustee (the “Trustee”), and
Christiana Bank & Trust Company, as Delaware Trustee, a summary of certain of the pertinent provisions of which is set forth
hereafter. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Pooling Agreement.
Nothing herein shall be deemed inconsistent with such meanings, and in the event of any conflict between the Pooling Agreement and
the terms of this Certificate, the Pooling Agreement shall control. This Certificate is issued under and is subject to the terms,
provisions and conditions of the Pooling Agreement, to which Pooling Agreement the Holder of this Certificate, by virtue of the
acceptance hereof, assents and by which such Holder is bound.



Distributions will be made, pursuant to
the Pooling Agreement, on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately
following (the “Distribution Date”), commencing on the first Distribution Date specified above, to the Person in whose
name this Certificate is registered at the close of business on the last day (or if such last day is not a Business Day, the
Business Day immediately preceding such last day) of the month immediately preceding the month of such distribution (the
“Record Date”), to the extent of such Certificateholder's Percentage Interest represented by this Certificate in the
portions (if any) then distributable on the Certificates of this Class of (i) the REMIC I Available Distribution Amount for such
Distribution Date, as specified in Section 4.01 of the Pooling Agreement and (ii) the REMIC II Available Distribution Amount for
such Distribution Date, as specified in Section 4.04 of the Pooling Agreement.



Distributions on this Certificate will
be made by the Trustee by wire transfer or check mailed to the address of the Person entitled thereto, as such name and address
shall appear on the Certificate Register. Notwithstanding the above, the final distribution on this Certificate will be made after
due notice by the Trustee of the pendency of such distribution and only upon presentation and surrender of this Certificate to the
Certificate Registrar.



Reference is hereby made to the further
provisions of this Certificate set forth below, which further provisions shall for all purposes have the same effect as if set
forth at this place.



Unless the certificate of
authentication hereon has been executed by or on behalf of the Trustee, by manual signature, this Certificate shall not be entitled
to any benefit under the Pooling Agreement or be valid for any purpose.







IN WITNESS WHEREOF, the Trust has
caused this Certificate to be duly executed.



WASHINGTON MUTUAL MORTGAGE PASS-THROUGH CERTIFICATES WMALT SERIES 2005-3 TRUST


 



By:    LASALLE BANK NATIONAL ASSOCIATION, as Trustee



 



By:
                                                                          


 


 



(TRUSTEE'S CERTIFICATE
OF AUTHENTICATION)



This is one of the Certificates
referred to in the within-mentioned Pooling Agreement.



LASALLE BANK
NATIONAL ASSOCIATION,


as Trustee


 


By:
                                                     


Dated:
                                                







 



WASHINGTON MUTUAL
MORTGAGE PASS-THROUGH CERTIFICATE


This Certificate is one of a duly authorized issue of Certificates
designated as Washington Mutual Mortgage Pass-Through Certificates of the Series and Class specified hereon (herein called the
“Certificates”) and representing certain interests in REMIC I and REMIC II.


The Certificates do not represent an obligation of, or an interest in,
the Company or any of its affiliates and are not insured or guaranteed by any governmental agency. The Certificates are limited in
right of payment to certain collections and recoveries respecting the Mortgage Loans, all as more specifically set forth herein and
in the Pooling Agreement. In the event funds are advanced with respect to any Mortgage Loan, such advance is reimbursable to the
Servicer from the related recoveries on such Mortgage Loan or from other cash deposited in the Certificate Account to the extent
that such advance is not otherwise recoverable.


As provided in the Pooling Agreement, withdrawals from the Certificate
Account may be made from time to time for purposes other than distributions to Certificateholders, such purposes including
reimbursement to the Servicer of advances made, or certain expenses incurred, by it.


The Pooling Agreement permits, with certain exceptions therein
provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the
Certificateholders under the Pooling Agreement at any time by the Company, the Servicer and the Trustee with the consent of the
Holders of the Certificates evidencing Percentage Interests aggregating not less than 66% of REMIC II. The Pooling Agreement also
permits the amendment thereof, in certain limited circumstances, without the consent of the Holders of any of the
Certificates.


As provided in the Pooling Agreement and subject to certain
limitations therein set forth, the transfer of this Certificate is registrable in the Certificate Register upon surrender of this
Certificate for registration of transfer at the offices of the Certificate Registrar or the office maintained by the Trustee in the
City and State of New York, duly endorsed by, or accompanied by an assignment in the form below or other written instrument of
transfer in form satisfactory to the Trustee or any Authenticating Agent duly executed by, the Holder hereof or such Holder's
attorney duly authorized in writing, and thereupon one or more new Certificates of Authorized Denominations evidencing the same
Percentage Interest set forth hereinabove will be issued to the designated transferee or transferees.


The Certificates are issuable only as registered Certificates without
coupons in Authorized Denominations specified in the Pooling Agreement. As provided in the Pooling Agreement and subject to certain
limitations therein set forth, Certificates are exchangeable for new Certificates of Authorized Denominations of like Certificate
Principal Balance or Percentage Interest, as applicable, as requested by the Holder surrendering the same.


A reasonable service charge may be made for any such registration of
transfer or exchange, and the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge payable
in connection therewith.


The Company, the Servicer, the Trustee and the Certificate Registrar
and any agent of the Company, the Servicer, the Trustee or the Certificate Registrar may treat the Person in whose name this
Certificate is registered as the owner hereof for all purposes, and neither the Company, the Servicer, the Trustee, the Certificate
Registrar nor any such agent shall be affected by notice to the contrary.


The obligations created by the Pooling Agreement and the Trust created
thereby shall terminate upon (i) the later of the maturity or other liquidation (including purchase by the Servicer) of the last
Mortgage Loan remaining in the Trust or the disposition of all property acquired upon foreclosure or deed in lieu of foreclosure of
any Mortgage Loan, and (ii) the payment to Certificateholders of all amounts held by the Trustee and required to be paid to them
pursuant to the Pooling Agreement. In the event that the Company or the Servicer purchases any Mortgage Loan pursuant to the
Pooling Agreement, the Pooling Agreement generally requires that the Trustee distribute to the Certificateholders in the aggregate
an amount equal to 100% of the unpaid Principal Balance of such Mortgage Loan, plus unpaid accrued interest thereon at the
applicable Pass-Through Rate to the last day of the month in which such purchase occurs. The Pooling Agreement permits, but does
not require, the Servicer to purchase from the Trust all Mortgage Loans at the time subject thereto and all property acquired in
respect of any Mortgage Loan upon payment to the Certificateholders of the amounts specified in the Pooling Agreement. The exercise
of such right will effect early retirement of the Certificates, the Servicer’s right to purchase being subject to the
aggregate Principal Balance of the Mortgage Loans at the time of purchase being less than the Clean-Up Call Percentage of the
aggregate Principal Balance of the Mortgage Loans as of the Cut-Off Date.











ASSIGNMENT



FOR VALUE RECEIVED the undersigned hereby sell(s) and assign(s) and transfer(s)
unto



                                                                                                                                                                                                                     



                                                                                                                                                                                                                     



(Please print or typewrite name and address, including postal
zip code of assignee. Please insert social security or other identifying number of assignee.)



the within Washington Mutual Mortgage
Pass-Through Certificate and hereby irrevocably constitutes and appoints



                                                                                                                                                                                                                     



Attorney to transfer said Certificate on the
Certificate Register, with full power of substitution in the premises.



 



  	
      Dated:__________________________________________	
      _____________________________________
	 	
      Signature Guaranteed
	 	 
	 	
      _____________________________________
	 	
NOTICE:    The signature to this assignment must correspond with the name as written upon the face of the
within instrument in every particular, without alteration or enlargement or any change whatever.  This Certificate does not
represent an obligation of or an interest in Washington Mutual Mortgage Securities Corp. or any of its affiliates.  Neither
this Certificate nor the underlying Mortgage Loans are guaranteed by any agency or instrumentality of the United States.







 













Exhibit C



ANTI-PREDATORY LENDING CATEGORIZATION


I.              High-Cost Loan Categorization


                                                                               
                                                       


	

State/Jurisdiction

	

Name of Anti-Predatory Lending

Law/Effective Date

	

Category under Applicable

Anti-Predatory Lending Law


	
Arkansas

	

Arkansas Home Loan Protection Act, Ark. Code Ann. §§ 23-53-101 et seq.



Effective July 16, 2003

	
High Cost Home Loan


	
Cleveland Heights, OH

	

Ordinance No. 72-2003 (PSH), Mun. Code §§ 757.01 et seq.



Effective June 2, 2003

	
Covered Loan


	
Colorado

	

Consumer Equity Protection, Colo. Stat. Ann.
§§ 5-3.5-101 et seq.



Effective for covered loans offered or entered
into on or after January 1, 2003. Other provisions of the Act took effect on June 7, 2002

	
Covered Loan


	
Connecticut

	

Connecticut Abusive Home Loan Lending Practices
Act, Conn. Gen. Stat. §§ 36a-746 et seq.



Effective October 1, 2001

	
High Cost Home Loan


	
District of Columbia

	

Home Loan Protection Act, D.C. Code
§§ 26-1151.01 et seq.



Effective for loans closed on or after January
28, 2003

	
Covered Loan


	
Florida

	

Fair Lending Act, Fla. Stat. Ann. §§ 494.0078 et seq.



Effective October 2, 2002

	
High Cost Home Loan


	
Georgia (Oct 1, 2002 – Mar 6, 2003)

	

Georgia Fair Lending Act, Ga. Code Ann. §§ 7-6A-1 et seq.



Effective October 1, 2002 – March 6,
2003

	
High Cost Home Loan


	
Georgia as amended (Mar 7, 2003 – current)

	

Georgia Fair Lending Act, Ga. Code Ann. §§ 7-6A-1 et seq.



Effective for loans closed on or after March 7,
2003

	
High Cost Home Loan


	
HOEPA Section 32

	

Home Ownership and Equity Protection Act of
1994, 15 U.S.C. § 1639, 12 C.F.R. §§ 226.32 and 226.34



Effective October 1, 1995, amendments October
1, 2002

	
High Cost Loan


	
Illinois

	

High Risk Home Loan Act, Ill. Comp. Stat. tit. 815, §§ 137/5 et seq.



Effective January 1, 2004 (prior to this date,
regulations under Residential Mortgage License Act effective from May 14, 2001)

	
High Risk Home Loan


	

Indiana

	

Indiana Home Loan Practices Act, Ind. Code Ann. §§ 24-9-1-1 et seq.



Effective for loans originated on or after
January 1, 2005.

	

High Cost Home Loan


	
Kansas

	

Consumer Credit Code, Kan. Stat. Ann. §§ 16a-1-101 et seq.



Sections 16a-1-301 and 16a-3-207 became
effective April 14, 1999; Section 16a-3-308a became effective July 1, 1999

	
High Loan to Value Consumer Loan (id. § 16a-3-207) and;


 


High APR Consumer Loan (id. § 16a-3-308a)


 


	
Kentucky

	

2003 KY H.B. 287 – High Cost Home Loan
Act, Ky. Rev. Stat. §§ 360.100 et seq.



Effective June 24, 2003

	
High Cost Home Loan


	
Maine

	

Truth in Lending, Me. Rev. Stat. tit. 9-A,
§§ 8-101 et seq.



Effective September 29, 1995 and as amended
from time to time

	
High Rate High Fee Mortgage


	
Massachusetts

	

Part 40 and Part 32, 209 C.M.R. §§
32.00 et seq. and 209 C.M.R. §§ 40.01 et seq.



Effective March 22, 2001 and amended from time
to time

	
High Cost Home Loan


	
Nevada

	

Assembly Bill No. 284, Nev. Rev. Stat. §§ 598D.010 et seq.



Effective October 1, 2003

	
Home Loan


	
New Jersey

	

New Jersey Home Ownership Security Act of 2002,
N.J. Rev. Stat. §§ 46:10B-22 et seq.



Effective for loans closed on or after November
27, 2003

	
High Cost Home Loan


	
New Mexico

	

Home Loan Protection Act, N.M. Rev.
Stat. §§ 58-21A-1 et seq.



Effective as of January 1, 2004; Revised as of
February 26, 2004

	
High Cost Home Loan


	
New York

	

N.Y. Banking Law Article 6-l



Effective for applications made on or after
April 1, 2003

	
High Cost Home Loan


	
North Carolina

	

Restrictions and Limitations on High Cost Home
Loans, N.C. Gen. Stat. §§ 24-1.1E et seq.



Effective July 1, 2000; amended October 1, 2003
(adding open-end lines of credit)

	
High Cost Home Loan


	
Ohio

	

H.B. 386 (codified in various sections of the
Ohio Code), Ohio Rev. Code Ann. §§ 1349.25 et seq.



Effective May 24, 2002

	
Covered Loan


	
Oklahoma

	

Consumer Credit Code (codified in various
sections of Title 14A)



Effective July 1, 2000; amended effective
January 1, 2004

	
Subsection 10 Mortgage


	
South Carolina

	

South Carolina High Cost and Consumer Home
Loans Act, S.C. Code Ann. §§ 37-23-10 et seq.



Effective for loans taken on or after January
1, 2004

	
High Cost Home Loan


	
West Virginia

	

West Virginia Residential Mortgage Lender,
Broker and Servicer Act, W. Va. Code Ann. §§ 31-17-1 et seq.



Effective June 5, 2002

	
West Virginia Mortgage Loan Act Loan





 


II.            Covered
Loan Categorization


                                                                               
                    


	

State/Jurisdiction

	

Name of Anti-Predatory Lending

Law/Effective Date

	

Category under Applicable

Anti-Predatory Lending Law


	
Georgia (Oct 1, 2002 – Mar 6, 2003)

	

Georgia Fair Lending Act, Ga. Code Ann. §§ 7-6A-1 et seq.



Effective October 1, 2002 – March 6,
2003

	
Covered Loan


	
New Jersey

	

New Jersey Home Ownership Security Act of 2002,
N.J. Rev. Stat. §§ 46:10B-22 et seq.



Effective November 27, 2003 – July 5,
2004

	
Covered Home Loan













Exhibit D



Mortgage Loan
Schedule 


 


	

 

	
        The Mortgage Loan Schedule,
included as Exhibit D to the Pooling and Servicing Agreement, has been intentionally omitted from this filing.  Copies may be
obtained from Washington Mutual Mortgage Securities Corp. or LaSalle Bank National Association by contacting,:





 


	

 

	
      in the case of Washington Mutual
Mortgage Securities Corp.,





 


	

 

	
        Laura Kelsey

         Master Servicing Department

         Washington Mutual Mortgage Securities Corp.

         75 N. Fairway Drive,VHF2A01

         Vernon Hills, IL 60061

         Telephone:  (847) 393-5198

         Facsimile:     (847) 549-2997





 


	

 

	
      in the case of LaSalle Bank National
Association,





 


	

 

	
        Stefanie Edwards

         LaSalle Bank National Association

         135 S. LaSalle Street, Suite 1625

         Chicago, IL  60603

         Telephone:  (312) 904-8975

         Facsimile:    (312) 904-2084





 



 










Exhibit E







[Reserved]



 


 









Exhibit F







FORM OF TRANSFEROR CERTIFICATE FOR



JUNIOR SUBORDINATE CERTIFICATES


 



[Date]



LaSalle Bank
National Association, as Trustee

135 South
LaSalle Street, Suite 1625

Chicago,
Illinois, 60603

Attention:
Global Securitization Trust Services 



Re:       Purchase of Washington Mutual Mortgage Pass-Through Certificates, WMALT Series
2005-3, Class [   ]  (the “Certificates”)


Ladies and Gentlemen:



In connection with our disposition of
the above Certificates we certify that (a) we understand the Certificates have not been registered under the Securities Act of
1933, as amended (the “Act”) and are being disposed by us in a transaction that is exempt from the registration
requirements of the Act, and (b) we have not offered or sold any certificates to, or solicited offers to buy any Certificates from,
any person, or otherwise approached or negotiated with any person with respect thereto, or taken any other action which would
result in a violation of Section 5 of the Act.


 



Very truly yours,



[Name of Transferor]



 



By:                                                      



                   Authorized
Officer









Exhibit G







FORM OF TRANSFEREE'S AGREEMENT FOR



JUNIOR SUBORDINATE
CERTIFICATES



[Date]



LaSalle Bank
National Association, as Trustee



135 South
LaSalle Street, Suite 1625



Chicago,
Illinois, 60603


Attention: Global Securitization Trust Services



Washington
Mutual Mortgage Securities Corp.



75 N. Fairway
Drive



Vernon Hills,
Illinois  60061


 



The undersigned (the
“Purchaser”) proposes to purchase Washington Mutual Mortgage Pass-Through Certificates, Series 2005-3, Class
[   ] (the “Purchased Certificates”) in the principal amount of $______________. In doing so, the Purchaser
hereby acknowledges and agrees as follows:



Section 1. Definitions. Each
capitalized term used herein and not otherwise defined herein shall have the meaning ascribed to it in the Pooling and Servicing
Agreement, dated as of April 1, 2005 (the “Pooling Agreement”), by and among Washington Mutual Mortgage Securities
Corp. (“Washington Mutual”), Washington Mutual Bank (the "Servicer"), LaSalle Bank National Association, as trustee
(the “Trustee”), and Christiana Bank & Trust Company, as Delaware trustee, of the Washington Mutual Mortgage
Pass-Through Certificates, WMALT Series 2005-3.



Section 2. Representations and
Warranties of the Purchaser. In connection with the proposed transfer, the Purchaser represents and warrants to Washington Mutual,
the Servicer, the Trustee and the Trust that:



(a)        The Purchaser is duly organized, validly existing and in good standing under
the laws of the jurisdiction in which the Purchaser is organized, is authorized to invest in the Purchased Certificates, and to
enter into this Agreement, and duly executed and delivered this Agreement;



(b)        The Purchaser is acquiring the Purchased Certificates for its own account as
principal and not with a view to the distribution thereof, in whole or in part;



(c)        The Purchaser is an “accredited investor” as such term is defined
in paragraph (a)(1), (a)(2), (a)(3), (a)(7) or (a)(8) of Section 501 of Regulation D under the Securities Act of 1933, as amended
(the “Act”), has knowledge of financial and business matters and is capable of evaluating the merits and risks of an
investment in the Purchased Certificates; the Purchaser has sought such accounting, legal and tax advice as it has considered
necessary to make an informed investment decision; and the Purchaser is able to bear the economic risk of an investment in the
Purchased Certificates and can afford a complete loss of such investment;



(d)        The Purchaser is not affiliated with the Trustee;



(e)        The Purchaser confirms that Washington Mutual has made available to the
Purchaser the opportunity to ask questions of, and receive answers from Washington Mutual concerning the trust created pursuant to
the Pooling Agreement (the “Trust”), the purchase by the Purchaser of the Purchased Certificates and all matters
relating thereto that Washington Mutual possesses or can acquire without unreasonable effort or expense; and



(f)        If applicable, the Purchaser has complied, and will continue to comply, with
the guidelines established by Thrift Bulletin 13a issued April 23, 1998, by the Office of Regulatory Activities of the Federal Home
Loan Bank System.



Section 3. Transfer of Purchased
Certificates.



(a)        The Purchaser understands that the Purchased Certificates have not been
registered under the Act, or any state securities laws and that no transfer may be made unless the Purchased Certificates are
registered under the Act and under applicable state law or unless an exemption from registration is available. The Purchaser
further understands that neither Washington Mutual nor the Trust is under any obligation to register the Purchased Certificates or
make an exemption available. In the event that such a transfer is to be made within two years from the Closing Date without
registration under the Act or applicable state securities laws, (i) the Trustee shall require, in order to assure compliance with
such laws, that the Certificateholder's prospective transferee each certify to Washington Mutual, the Trustee and the Trust as to
the factual basis for the registration or qualification exemption relied upon, and (ii) the Trustee or Washington Mutual may
require an Opinion of Counsel that such transfer may be made pursuant to an exemption from the Act and state securities laws, which
Opinion of Counsel shall not be an expense of the Trust, the Trustee or Washington Mutual. Any such Certificateholder desiring to
effect such transfer shall, and does hereby agree to, indemnify the Trust, the Trustee and Washington Mutual against any liability
that may result if the transfer is not so exempt or is not made in accordance with such federal and state laws.



(b)        No transfer of a Purchased Certificate shall be made unless the transferee
provides Washington Mutual and the Trustee with (i) a Transferee's Agreement, substantially in the form of this Agreement, (ii) an
affidavit substantially in the form of Exhibit N to the Pooling Agreement and (iii) if so indicated in such affidavit, a Benefit
Plan Opinion (as defined in Section 1.01 of the Pooling Agreement).



(c)        The Purchaser acknowledges that its Purchased Certificates bear a legend
setting forth the applicable restrictions on transfer.







IN WITNESS WHEREOF, the undersigned
has caused this Agreement to be validly executed by its duly authorized representative as of the day and the year first above
written.



[Purchaser]


 



 



By:
                                                                 



Its:









Exhibit H







FORM OF ADDITIONAL MATTER INCORPORATED INTO



THE FORM OF THE
CERTIFICATES (OTHER THAN THE CLASS R CERTIFICATES)



This Certificate does not represent an
obligation of or interest in Washington Mutual Mortgage Securities Corp. or any of its affiliates. Neither this Certificate nor the
underlying Mortgage Loans are guaranteed by any agency or instrumentality of the United States.



This certifies that the above-named
Registered Owner is the registered owner of certain interests in a pool of assets (“REMIC II”) consisting of interests
in another pool of assets (“REMIC I”) consisting of, among other things, conventional one- to four-family mortgage
loans (the “Mortgage Loans”), formed by Washington Mutual Mortgage Securities Corp. (the “Company”), which
term includes any successor entity under the Pooling Agreement referred to below. REMIC I and REMIC II were created pursuant to a
Pooling and Servicing Agreement, dated as of the Cut-Off Date stated above (the “Pooling Agreement”), among the
Company, the Servicer, LaSalle Bank National Association, as Trustee (the “Trustee”), and Christiana Bank & Trust
Company, as Delaware Trustee, a summary of certain of the pertinent provisions of which is set forth hereafter. To the extent not
defined herein, the capitalized terms used herein have the meanings assigned in the Pooling Agreement. Nothing herein shall be
deemed inconsistent with such meanings, and in the event of any conflict between the Pooling Agreement and the terms of this
Certificate, the Pooling Agreement shall control. This Certificate is issued under and is subject to the terms, provisions and
conditions of the Pooling Agreement, to which Pooling Agreement the Holder of this Certificate, by virtue of the acceptance hereof,
assents and by which such Holder is bound.



Distributions will be made, pursuant to
the Pooling Agreement, on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately
following (the “Distribution Date”), commencing on the first Distribution Date specified above, to the Person in whose
name this Certificate is registered at the close of business on the last day (or if such last day is not a Business Day, the
Business Day immediately preceding such last day) of the month immediately preceding the month of such distribution (the
“Record Date”), to the extent of such Certificateholder's Percentage Interest represented by this Certificate in the
portion of the REMIC II Available Distribution Amount for such Distribution Date then distributable on the Certificates of this
Class, as specified in Section 4.04 of the Pooling Agreement.



Distributions on this Certificate will
be made by the Trustee by wire transfer or check mailed to the address of the Person entitled thereto, as such name and address
shall appear on the Certificate Register. Notwithstanding the above, the final distribution on this Certificate will be made after
due notice by the Trustee of the pendency of such distribution and only upon presentation and surrender of this Certificate to the
Certificate Registrar.



Reference is hereby made to the further
provisions of this Certificate set forth below, which further provisions shall for all purposes have the same effect as if set
forth at this place.



Unless the certificate of
authentication hereon has been executed by or on behalf of the Trustee, by manual signature, this Certificate shall not be entitled
to any benefit under the Pooling Agreement or be valid for any purpose.







IN WITNESS WHEREOF, the Trust has
caused this Certificate to be duly executed.



WASHINGTON MUTUAL MORTGAGE
PASS-THROUGH CERTIFICATES, WMALT SERIES 2005-3 TRUST


 



By:    LASALLE BANK NATIONAL ASSOCIATION, as Trustee



 



By:
                                                                          


 


 



(TRUSTEE'S CERTIFICATE
OF AUTHENTICATION)



This is one of the Certificates
referred to in the within-mentioned Pooling Agreement.



LASALLE BANK
NATIONAL ASSOCIATION,


as Trustee


 


By:
                                                     


Dated:
                                                







 



WASHINGTON MUTUAL
MORTGAGE PASS-THROUGH CERTIFICATE


This Certificate is one of a duly authorized issue of Certificates
designated as Washington Mutual Mortgage Pass-Through Certificates of the Series and Class specified hereon (herein called the
“Certificates”) and representing certain interests in REMIC II[to be used only in the case of the Class 1-CB-3
Certificates and Class 2-A-3 Certificates:][, together with certain rights specified in the Pooling Agreement].


The Certificates do not represent an obligation of, or an interest in,
the Company or any of its affiliates and are not insured or guaranteed by any governmental agency. The Certificates are limited in
right of payment to certain collections and recoveries respecting the Mortgage Loans, all as more specifically set forth herein and
in the Pooling Agreement. In the event funds are advanced with respect to any Mortgage Loan, such advance is reimbursable to the
Servicer from the related recoveries on such Mortgage Loan or from other cash deposited in the Certificate Account to the extent
that such advance is not otherwise recoverable.


As provided in the Pooling Agreement, withdrawals from the Certificate
Account may be made from time to time for purposes other than distributions to Certificateholders, such purposes including
reimbursement to the Servicer of advances made, or certain expenses incurred, by it.


The Pooling Agreement permits, with certain exceptions therein
provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the
Certificateholders under the Pooling Agreement at any time by the Company, the Servicer and the Trustee with the consent of the
Holders of the Certificates evidencing Percentage Interests aggregating not less than 66% of REMIC II. Any such consent by the
Holder of this Certificate shall be conclusive and binding on such Holder and upon all future Holders of this Certificate and of
any Certificate issued upon the transfer hereof or in exchange herefor or in lieu hereof whether or not notation of such consent is
made upon this Certificate. The Pooling Agreement also permits the amendment thereof, in certain limited circumstances, without the
consent of the Holders of any of the Certificates.


As provided in the Pooling Agreement and subject to certain
limitations therein set forth, the transfer of this Certificate is registrable in the Certificate Register upon surrender of this
Certificate for registration of transfer at the offices of the Certificate Registrar or the office maintained by the Trustee in the
City and State of New York, duly endorsed by, or accompanied by an assignment in the form below or other written instrument of
transfer in form satisfactory to the Trustee or any Authenticating Agent duly executed by, the Holder hereof or such Holder's
attorney duly authorized in writing, and thereupon one or more new Certificates of Authorized Denominations evidencing the same
Percentage Interest set forth hereinabove will be issued to the designated transferee or transferees.


[to be used only in the case of the Junior Subordinate Certificates:]
[No transfer of a Certificate will be made unless such transfer is exempt from or is made in accordance with the registration
requirements of the Securities Act of 1933, as amended (the “Securities Act”) and any applicable state securities laws.
In the event that a transfer is to be made without registration or qualification under applicable laws, (i) in the event such
transfer is made pursuant to Rule 144A under the Securities Act, the Company and the Trustee shall require the transferee to
execute an investment letter in substantially the form attached as Exhibit L to the Pooling Agreement, which investment letter
shall not be an expense of the Company, the Servicer, the Trust or the Trustee and (ii) in the event that such a transfer is not
made pursuant to Rule 144A under the Securities Act, the Trustee may require an Opinion of Counsel satisfactory to the Trustee that
such transfer may be made without such registration or qualification, which Opinion of Counsel shall not be an expense of the
Company, the Servicer, the Trust or the Trustee. Neither the Company nor the Trust will register the Certificate under the
Securities Act, qualify the Certificate under any state securities law or provide registration rights to any purchaser. Any Holder
desiring to effect such transfer shall, and does hereby agree to, indemnify the Trust, the Trustee, the Company and the Servicer
against any liability that may result if the transfer is not so exempt or is not made in accordance with such federal and state
laws.]


The Certificates are issuable only as registered Certificates without
coupons in Authorized Denominations specified in the Pooling Agreement. As provided in the Pooling Agreement and subject to certain
limitations therein set forth, Certificates are exchangeable for new Certificates of Authorized Denominations of like Certificate
Principal Balance or Percentage Interest, as applicable, as requested by the Holder surrendering the same.


A reasonable service charge may be made for any such registration of
transfer or exchange, and the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge payable
in connection therewith.


The Company, the Servicer, the Trustee and the Certificate Registrar
and any agent of the Company, the Servicer, the Trustee or the Certificate Registrar may treat the Person in whose name this
Certificate is registered as the owner hereof for all purposes, and neither the Company, the Servicer, the Trustee, the Certificate
Registrar nor any such agent shall be affected by notice to the contrary.


The obligations created by the Pooling Agreement and the Trust created
thereby shall terminate upon (i) the later of the maturity or other liquidation (including purchase by the Servicer) of the last
Mortgage Loan remaining in the Trust or the disposition of all property acquired upon foreclosure or deed in lieu of foreclosure of
any Mortgage Loan, and (ii) the payment to Certificateholders of all amounts held by the Trustee and required to be paid to them
pursuant to the Pooling Agreement. In the event that the Company or the Servicer purchases any Mortgage Loan pursuant to the
Pooling Agreement, the Pooling Agreement generally requires that the Trustee distribute to the Certificateholders in the aggregate
an amount equal to 100% of the unpaid Principal Balance of such Mortgage Loan, plus unpaid accrued interest thereon at the
applicable Pass-Through Rate to the last day of the month in which such purchase occurs. The Pooling Agreement permits, but does
not require, the Servicer to purchase from the Trust all Mortgage Loans at the time subject thereto and all property acquired in
respect of any Mortgage Loan upon payment to the Certificateholders of the amounts specified in the Pooling Agreement. The exercise
of such right will effect early retirement of the Certificates, the Servicer’s right to purchase being subject to the
aggregate Principal Balance of the Mortgage Loans at the time of purchase being less than the Clean-Up Call Percentage of the
aggregate Principal Balance of the Mortgage Loans as of the Cut-Off Date.









ASSIGNMENT



FOR VALUE RECEIVED the undersigned hereby sell(s) and assign(s) and transfer(s)
unto



                                                                                                                                                                                                                     



                                                                                                                                                                                                                     



(Please print or typewrite name and address, including postal
zip code of assignee. Please insert social security or other identifying number of assignee.)



the within Washington Mutual
Mortgage Pass-Through Certificate and hereby irrevocably constitutes and appoints



                                                                                                                                                                                                                     



Attorney to transfer said Certificate on the
Certificate Register, with full power of substitution in the premises.



 



  	
      Dated:__________________________________________	
      _____________________________________
	 	
      Signature Guaranteed
	 	 
	 	
      _____________________________________
	 	
NOTICE:    The signature to this assignment must correspond with the name as written upon the face of the
within instrument in every particular, without alteration or enlargement or any change whatever.  This Certificate does not
represent an obligation of or an interest in Washington Mutual Mortgage Securities Corp. or any of its affiliates.  Neither
this Certificate nor the underlying Mortgage Loans are guaranteed by any agency or instrumentality of the United States.








 










Exhibit I







TRANSFEROR
CERTIFICATE



[Date]



LaSalle Bank
National Association, as Trustee

135 South
LaSalle Street, Suite 1625

Chicago,
Illinois, 60603

Attention: Global Securitization Trust Services



Re:
     Washington Mutual Mortgage Pass-Through Certificates, Series 2005-3, Class R


Ladies and Gentlemen:



This letter is delivered to you in
connection with the sale from
                                        
 (the “Seller”) to           
                                   
(the “Purchaser”) of $____________________ initial Certificate Principal Balance of Washington Mutual Mortgage
Pass-Through Certificates, WMALT Series 2005-3, Class R (the “Certificate”), pursuant to Section 5.01 of the Pooling
and Servicing Agreement (the “Pooling Agreement”), dated as of April 1, 2005 among Washington Mutual Mortgage
Securities Corp., as depositor (the “Company”), Washington Mutual Bank, FA, as servicer (the "Servicer"), LaSalle Bank
National Association, as trustee (the “Trustee”), and Christiana Bank & Trust Company, as Delaware trustee. All
terms used herein and not otherwise defined shall have the meanings set forth in the Pooling Agreement. The Seller hereby
certifies, represents and warrants to, and covenants with, the Company, the Servicer, the Trustee and the Trust that:



1.         No purpose of the Seller relating to the sale of the Certificate by the
Seller to the Purchaser is or will be to enable the Seller to impede the assessment or collection of tax.



2.         The Seller understands that the Purchaser has delivered to the Trustee
and the Company a transferee affidavit and agreement in the form attached to the Pooling Agreement as Exhibit J. The Seller does
not know or believe that any representation contained therein is false.



3.         The Seller has no actual knowledge that the proposed Transferee is not a
Permitted Transferee.



4.         The Seller has no actual knowledge that the Purchaser would be unwilling
or unable to pay taxes due on its share of the taxable income attributable to the Certificates.



5.         The Seller has conducted a reasonable investigation of the financial
condition of the Purchaser and, as a result of the investigation, found that the Purchaser has historically paid its debts as they
came due, and found no significant evidence to indicate that the Purchaser will not continue to pay its debts as they come due in
the future.







6.         The Purchaser has represented to the Seller that, if the Certificates
constitute a noneconomic residual interest, it (i) understands that as holder of a noneconomic residual interest it may incur tax
liabilities in excess of any cash flows generated by the interest, and (ii) intends to pay taxes associated with its holding of the
Certificates as they become due.



Very truly yours,



 



[Seller]



 



By:
                                                                             



      Name:
                                                                  



      Title:
                                                                     









Exhibit J







TRANSFEREE AFFIDAVIT
AND AGREEMENT


 



STATE
OF                   )

                                   )   ss:

COUNTY
OF                )


 



[NAME OF OFFICER], being first duly
sworn, deposes and says:



1.         That he is [Title of Officer] of [Name of Owner] (record or beneficial
owner of the Class R Certificate (the “Owner”)), a [savings institution] [corporation] duly organized and existing
under the laws of [the State of
                  ] [the United
States], on behalf of which he makes this affidavit and agreement.



2.         That the Owner (i) is not and will not be a “disqualified
organization” as of [date of transfer] within the meaning of Section 860E(e)(5) of the Internal Revenue Code of 1986, as
amended (the “Code”) and will endeavor to remain other than a disqualified organization for so long as it retains its
ownership interest in the Class R Certificates, and (ii) is acquiring the Class R Certificates for its own account or for the
account of another Owner from which it has received an affidavit and agreement in substantially the same form as this affidavit and
agreement. (For this purpose, a disqualified organization” means the United States, any state or political subdivision
thereof, or any agency or instrumentality of any of the foregoing (other than an instrumentality all of the activities of which are
subject to tax and, except for the Federal Home Loan Mortgage Corporation, a majority of whose board of directors is not selected
by any such governmental entity), or any foreign government or international organization, or any agency or instrumentality of such
foreign government or organization, any rural electric or telephone cooperative, or any organization (other than certain farmers'
cooperatives) that is generally exempt from federal income tax unless such organization is subject to the tax on unrelated business
taxable income).



3.         That the Owner is aware (i) of the tax that would be imposed on transfers
of the Class R Certificates after March 31, 1988; (ii) that such tax would be on the transferor, or, if such transfer is through an
agent (which person includes a broker, nominee or middle-man) for a disqualified organization, on the agent; (iii) that the person
otherwise liable for the tax shall be relieved of liability for the tax if the transferee furnishes to such person an affidavit
that the transferee is not a disqualified organization and, at the time of transfer, such person does not have actual knowledge
that the affidavit is false; and (iv) that the Class R Certificates may be a “noneconomic residual interest” within the
meaning of Treasury regulations promulgated pursuant to the Code and that the transferor of a noneconomic residual interest will
remain liable for any taxes due with respect to the income on such residual interest, if a significant purpose of the transfer was
to enable the transferor to impede the assessment or collection of tax.



4.         That the Owner is aware of the tax imposed on a “pass-through
entity” holding the Class R Certificates if at any time during the taxable year of the pass-through entity a disqualified
organization is the record holder of an interest in such entity. (For this purpose, a “pass through entity” includes a
regulated investment company, a real estate investment trust or common trust fund, a partnership, trust or estate, and certain
cooperatives.)



5.         That the Owner is aware that the Trustee will not register the Transfer
of the Class R Certificates unless the transferee, or the transferees' agent, delivers to it an affidavit and agreement, among
other things, in substantially the same form as this affidavit and agreement. The Owner expressly agrees that it will not
consummate any such transfer if it knows or believes that any of the representations contained in such affidavit and agreement are
false.



6.         That the Owner has reviewed the restrictions set forth on the face of the
Class R Certificates and the provisions of Section 5.01 of the Pooling Agreement under which the Class R Certificates were issued
(in particular, clauses (iii)(A) and (iii)(B) of Section 5.01(c) which authorize the Trustee to deliver payments to a person other
than the Owner and negotiate a mandatory sale by the Trustee in the event the Owner holds such Certificates in violation of Section
5.01). The Owner expressly agrees to be bound by and to comply with such restrictions and provisions.



7.         That the Owner consents to any additional restrictions or arrangements
that shall be deemed necessary upon advice of counsel to constitute a reasonable arrangement to ensure that the Class R
Certificates will only be owned, directly or indirectly, by an Owner that is not a disqualified organization.



8.         The Owner's Taxpayer Identification Number is
                              
..



9.         That no purpose of the Owner relating to the purchase of the Class R
Certificates by the Owner is or will be to enable the transferor to impede the assessment or collection of tax and that in
making this representation, the Owner warrants that the Owner is familiar with Treasury Regulation 1.860E-1(c) and with the
preamble to the adoption of amendments to that regulation as of July 19, 2002, attached hereto as Exhibit 1.



10.        That the Owner anticipates that it will, so long as it holds the Class R
Certificates, have sufficient assets to pay any taxes owed by the holder of such Certificates, and hereby represents to and for the
benefit of the person from whom it acquired the Class R Certificates that the Owner intends to pay taxes associated with holding
such Certificates as they become due, fully understanding that it may incur tax liabilities in excess of any cash flows generated
by the Class R Certificates. That the Owner has provided financial statements or other financial information requested by the
transferor in connection with the transfer of the Class R Certificates to permit the transferor to assess the financial capability
of the Owner to pay such taxes.



11.        That the Owner has no present knowledge or expectation that it will be unable
to pay any United States taxes owed by it so long as any of the Class R Certificates remain outstanding.



12.        That the Owner has no present knowledge or expectation that it will become
insolvent or subject to a bankruptcy proceeding for so long as any of the Class R Certificates remain outstanding.



13.        That the Owner is familiar with Treasury Regulation 1.860E-1(c) and
with the preamble to the adoption of amendments to that regulation as of July 19, 2002, attached hereto as Exhibit 1, and that no purpose of the Owner relating to any sale of the Class R Certificates by the Owner will be to impede the
assessment or collection of tax.



14.        The Owner is a citizen or resident of the United States, a corporation,
partnership or other entity treated as a partnership or corporation for U.S. federal income tax purposes created or organized in,
or under the laws of, the United States or any state thereof or the District of Columbia, or an estate or trust whose income from
sources without the United States is includible in gross income for United States federal income tax purposes regardless of its
connection with the conduct of a trade or business within the United States.



15.        The Owner hereby agrees that it will not cause income from the Class R
Certificates to be attributable to a foreign permanent establishment or fixed base (within the meaning of an applicable income tax
treaty) of the Owner or another United States taxpayer.



16.        The Owner hereby agrees to cooperate with the Company and to take any action
required of it by the Code or Treasury regulations thereunder (whether now or hereafter promulgated) in order to create or maintain
the REMIC status of REMIC I and REMIC II (the “REMICs”).



17.        The Owner hereby agrees that it will not take any action that could endanger
the REMIC status of the REMICs or result in the imposition of tax on the REMICs unless counsel for, or acceptable to, the Company
has provided an opinion that such action will not result in the loss of such REMIC status or the imposition of such tax, as
applicable.



18.        The Owner as transferee of the Class R Certificates has represented to the
transferor that, if the Class R Certificates constitute a noneconomic residual interest, the Owner (i) understands that as holder
of a noneconomic residual interest it may incur tax liabilities in excess of any cash flows generated by the interest, and (ii)
intends to pay taxes associated with its holding of the Class R Certificates as they become due.


            19.        That the Owner satisfies the condition in the paragraph marked below [mark one
paragraph only]:



___      The
Owner is not an employee benefit or other plan subject to the prohibited transaction provisions of the Employee Retirement Income
Security Act of 1974, as amended, or Section 4975 of the Internal Revenue Code of 1986, as amended (a “Plan”), or any
other person (including an investment manager, a named fiduciary or a trustee of any Plan) acting, directly or indirectly, on
behalf of, or purchasing the Class R Certificates with “plan assets” of, any Plan within the meaning of the Department
of Labor (“DOL”) regulation at 29 C.F.R. Section 2510.3-101.



___      The Owner has delivered a Benefit Plan Opinion (as defined in Section 1.01 of the Pooling
Agreement under which the Class R Certificates were issued).



IN WITNESS WHEREOF, the Owner has
caused this instrument to be executed on its behalf, pursuant to the authority of its Board of Directors, by its [Title of Officer]
and its corporate seal to be hereunto attached, attested by its [Assistant] Secretary, this
          day of          ,
20 __ .



[Name of Owner]



By:                                                      



                  [Name of
Officer]



                   [Title of
Officer]


[Corporate Seal]


ATTEST:


 


 


[Assistant] Secretary



Personally appeared before me the
above-named [Name of Officer], known or proved to me to be the same person who executed the foregoing instrument and to be the
[Title of Officer] of the Owner, and Acknowledged to me that he executed the same as his free act and deed and the free act and
deed of the Owner.



Subscribed and sworn before me this ___
day of __________________, 20__.


 


 



NOTARY PUBLIC



 



COUNTY OF



STATE OF



My Commission expires the     day



of
                     ,
20     


 







Exhibit 1 to Transferee
Affidavit



 



DEPARTMENT OF THE TREASURY

Internal Revenue Service

26 CFR Parts 1 and 602

[TD 9004]

RIN 1545-AW98



Real Estate Mortgage Investment Conduits



AGENCY: Internal Revenue Service (IRS), Treasury.



ACTION: Final regulations.



 



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



 



SUMMARY: This document contains final regulations relating to safe harbor transfers of noneconomic residual interests in
real estate mortgage investment conduits (REMICs). The final regulations provide additional limitations on the circumstances under
which transferors may claim safe harbor treatment.



 



DATES:           Effective Date: These regulations are effective July 19,
2002.



Applicability
Date: For dates of applicability, see Sec. 1.860E-



(1)(c)(10). 



FOR FURTHER INFORMATION CONTACT: Courtney Shepardson at (202) 622-3940 (not a toll-free number).



SUPPLEMENTARY INFORMATION:



Paperwork Reduction Act



The collection of information in this final rule has been reviewed and, pending receipt and evaluation of public comments,
approved by the Office of Management and Budget (OMB) under 44 U.S.C. 3507 and assigned control number 1545-1675.  The
collection of information in this regulation is in Sec. 1.860E-1(c)(5)(ii). This information is required to enable the IRS to
verify that a taxpayer is complying with the conditions of this regulation. The collection of information is mandatory and is
required. Otherwise, the taxpayer will not receive the benefit of safe harbor treatment as provided in the regulation. The likely
respondents are businesses and other for-profit institutions.



Comments on the collection of information should be sent to the Office of Management and Budget, Attn: Desk Officer for the
Department of the Treasury, Office of Information and Regulatory Affairs, Washington, DC, 20503, with copies to the Internal
Revenue Service, Attn: IRS Reports Clearance Officer, W:CAR:MP:FP:S, Washington, DC 20224. Comments on the collection of
information should be received by September 17, 2002. Comments are specifically requested concerning: 



 



Whether the
collection of information is necessary for the proper performance of the functions of the Internal Revenue Service, including
whether the information will have practical utility;  



 



The accuracy of the
estimated burden associated with the collection of information (see below);

 



How the quality,
utility, and clarity of the information to be collected may be enhanced;



 



How the burden of
complying with the collection of information may be minimized, including through the application of automated collection techniques
or other forms of information technology; and



 



Estimates of
capital or start-up costs and costs of operation, maintenance, and purchase of service to provide information.



An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it
displays a valid control number assigned by the Office of Management and Budget.   



The estimated total annual reporting burden is 470 hours, based on an estimated number of respondents of 470 and an
estimated average annual burden hours per respondent of one hour.



Books or records relating to a collection of information must be retained as long as their contents may become material in
the administration of any internal revenue law. Generally, tax returns and tax return information are confidential, as required by
26 U.S.C. 6103.



Background



This document contains final regulations regarding the proposed amendments to 26 CFR part 1 under section 860E of the
Internal Revenue Code (Code). The regulations provide the circumstances under which a transferor of a noneconomic REMIC residual
interest meeting the investigation and representation requirements may avail itself of the safe harbor by satisfying either the
formula test or the asset test.



Final regulations governing REMICs, issued in 1992, contain rules governing the transfer of noneconomic REMIC residual
interests. In general, a transfer of a noneconomic residual interest is disregarded for all tax purposes if a significant purpose
of the transfer is to enable the transferor to impede the assessment or collection of tax. A purpose to impede the assessment or
collection of tax (a wrongful purpose) exists if the transferor, at the time of the transfer, either knew or should have known that
the transferee would be unwilling or unable to pay taxes due on its share of the REMIC's taxable income.



Under a safe harbor, the transferor of a REMIC noneconomic residual interest is presumed not to have a wrongful purpose if
two requirements are satisfied: (1) the transferor conducts a reasonable investigation of the transferee's financial condition (the
investigation requirement); and (2) the transferor secures a representation from the transferee to the effect that the transferee
understands the tax obligations associated with holding a residual interest and intends to pay those taxes (the representation
requirement).



The IRS and Treasury have been concerned that some transferors of noneconomic residual interests claim they satisfy the safe
harbor even in situations where the economics of the transfer clearly indicate the transferee is unwilling or unable to pay the tax
associated with holding the interest. For this reason, on February 7, 2000, the IRS published in the Federal Register (65 FR 5807)
a notice of proposed rulemaking (REG-100276-97; REG-122450-98) designed to clarify the safe harbor by adding the ``formula test,''
an economic test. The proposed regulation provides that the safe harbor is unavailable unless the present value of the anticipated
tax liabilities associated with holding the residual interest does not exceed the sum of: (1) The present value of any
consideration given to the transferee to acquire the interest; (2) the present value of the expected future distributions on the
interest; and (3) the present value of the anticipated tax savings associated with holding the interest as the REMIC generates
losses.



The notice of proposed rulemaking also contained rules for FASITs. Section 1.860H-6(g) of the proposed regulations provides
requirements for transfers of FASIT ownership interests and adopts a safe harbor by reference to the safe harbor provisions of the
REMIC regulations.   



In January 2001, the IRS published Rev. Proc. 2001-12 (2001-3 I.R.B. 335) to set forth an alternative safe harbor that
taxpayers could use while the IRS and the Treasury considered comments on the proposed regulations. Under the alternative safe
harbor, if a transferor meets the investigation requirement and the representation requirement but the transfer fails to meet the
formula test, the transferor may invoke the safe harbor if the transferee meets a two-prong test (the asset test). A transferee
generally meets the first prong of this test if, at the time of the transfer, and in each of the two years preceding the year of
transfer, the transferee's gross assets exceed $100 million and its net assets exceed $10 million. A transferee generally meets the
second prong of this test if it is a domestic, taxable corporation and agrees in writing not to transfer the interest to any person
other than another domestic, taxable corporation that also satisfies the requirements of the asset test. A transferor cannot rely
on the asset test if the transferor knows, or has reason to know, that the transferee will not comply with its written agreement to
limit the restrictions on subsequent transfers of the residual interest.



Rev. Proc. 2001-12 provides that the asset test fails to be satisfied in the case of a transfer or assignment of a
noneconomic residual interest to a foreign branch of an otherwise eligible transferee. If such a transfer or assignment were
permitted, a corporate taxpayer might seek to claim that the provisions of an applicable income tax treaty would resource excess
inclusion income as foreign source income, and that, as a consequence, any U.S. tax liability attributable to the excess inclusion
income could be offset by foreign tax credits. Such a claim would impede the assessment or collection of U.S. tax on excess
inclusion income, contrary to the congressional purpose of assuring that such income will be taxable in all events. See, e.g.,
sections 860E(a)(1), (b), (e) and 860G(b) of the Code.



The Treasury and the IRS have learned that certain taxpayers transferring noneconomic residual interests to foreign branches
have attempted to rely on the formula test to obtain safe harbor treatment in an effort to impede the assessment or collection of
U.S. tax on excess inclusion income. Accordingly, the final regulations provide that if a noneconomic residual interest is
transferred to a foreign permanent establishment or fixed base of a U.S. taxpayer, the transfer is not eligible for safe harbor
treatment under either the asset test or the formula test. The final regulations also require a transferee to represent that it
will not cause income from the noneconomic residual interest to be attributable to a foreign permanent establishment or fixed
base.



Section 1.860E-1(c)(8) provides computational rules that a taxpayer may use to qualify for safe harbor status under the
formula test. Section 1.860E-1(c)(8)(i) provides that the transferee is presumed to pay tax at a rate equal to the highest rate of
tax specified in section 11(b). Some commentators were concerned that this presumed rate of taxation was too high because it does
not take into consideration taxpayers subject to the alternative minimum tax rate. In light of the comments received, this
provision has been amended in the final regulations to allow certain transferees that compute their taxable income using the
alternative minimum tax rate to use the alternative minimum tax rate applicable to corporations.



Additionally, Sec. 1.860E-1(c)(8)(iii) provides that the present values in the formula test are to be computed using a
discount rate equal to the applicable Federal short-term rate prescribed by section 1274(d). This is a change from the proposed
regulation and Rev. Proc. 2001-12. In those publications the provision stated that “present values are computed using a
discount rate equal to the applicable Federal rate prescribed in section 1274(d) compounded semiannually” and that “[a]
lower discount rate may be used if the transferee can demonstrate that it regularly borrows, in the course of its trade or
business, substantial funds at such lower rate from an unrelated third party.”  The IRS and the Treasury Department have
learned that, based on this provision, certain taxpayers have been attempting to use unrealistically low or zero interest rates to
satisfy the formula test, frustrating the intent of the test. Furthermore, the Treasury Department and the IRS believe that a rule
allowing for a rate other than a rate based on an objective index would add unnecessary complexity to the safe harbor. As a result,
the rule in the proposed regulations that permits a transferee to use a lower discount rate, if the transferee can demonstrate that
it regularly borrows substantial funds at such lower rate, is not included in the final regulations; and the Federal short-term
rate has been substituted for the applicable Federal rate. To simplify taxpayers' computations, the final regulations allow use of
any of the published short-term rates, provided that the present values are computed with a corresponding period of compounding.
With the exception of the provisions relating to transfers to foreign branches, these changes generally have the proposed
applicability date of February 4, 2000, but taxpayers may choose to apply the interest rate formula set forth in the proposed
regulation and Rev. Proc. 2001-12 for transfers occurring before August 19, 2002.



It is anticipated that when final regulations are adopted with respect to FASITs, Sec. 1.860H-6(g) of the proposed
regulations will be adopted in substantially its present form, with the result that the final regulations contained in this
document will also govern transfers of FASIT ownership interests with substantially the same applicability date as is contained in
this document.



Effect on Other Documents



Rev. Proc. 2001-12 (2001-3 I.R.B. 335) is obsolete for transfers of noneconomic residual interests in REMICs occurring on or
after August 19, 2002.



Special Analyses



It is hereby certified that these regulations will not have a significant economic impact on a substantial number of small
entities. This certification is based on the fact that it is unlikely that a substantial number of small entities will hold REMIC
residual interests. Therefore, a Regulatory Flexibility Analysis under the Regulatory Flexibility Act (5 U.S.C. chapter 6) is not
required. It has been determined that this Treasury decision is not a significant regulatory action as defined in Executive Order
12866. Therefore, a regulatory assessment is not required. It also has been determined that sections 553(b) and 553(d) of the
Administrative Procedure Act (5 U.S.C. chapter 5) do not apply to these regulations.



Drafting Information



The principal author of these regulations is Courtney Shepardson. However, other personnel from the IRS and Treasury
Department participated in their development.



List of Subjects



26 CFR Part 1



Income taxes, Reporting and record keeping requirements.



26 CFR Part 602



Reporting and record keeping requirements.



Adoption of Amendments to the Regulations



Accordingly, 26 CFR parts 1 and 602 are amended as follows:



PART 1--INCOME TAXES



 



Paragraph 1. The
authority citation for part 1 continues to read in part as follows:



 



    Authority: 26 U.S.C. 7805 * * *



 










Exhibit K



[RESERVED]









Exhibit L







[FORM OF RULE 144A
INVESTMENT REPRESENTATION]



Description of Rule
144A Securities, including numbers:



                                                  



                                                  



                                                  



                                                  


 



The undersigned  seller, as
registered holder (the “Seller”), intends to transfer the Rule 144A Securities described above to the undersigned buyer
(the “Buyer”).



1.         In connection with such transfer and in accordance with the agreements
pursuant to which the Rule 144A Securities were issued, the Seller hereby certifies the following facts: Neither the Seller nor
anyone acting on its behalf has offered, transferred, pledged, sold or otherwise disposed of the Rule 144A Securities, any interest
in the Rule 144A Securities or any other similar security to, or solicited any offer to buy or accept a transfer, pledge or other
disposition of the Rule 144A Securities, any interest in the Rule 144A Securities or any other similar security from, or otherwise
approached or negotiated with respect to the Rule 144A Securities, any interest in the Rule 144A Securities or any other similar
security with, any person in any manner, or made any general solicitation by means of general advertising or in any other manner,
or taken any other action, that would constitute a distribution of the Rule 144A Securities under the Securities Act of 1933, as
amended (the “1933 Act”), or that would render the disposition of the Rule 144A Securities a violation of Section 5 of
the 1933 Act or require registration pursuant thereto, and that the Seller has not offered the Rule 144A Securities to any person
other than the Buyer or another “qualified institutional buyer” as defined in Rule 144A under the 1933 Act.



2.         The Buyer warrants and represents to, and covenants with, the Seller, the
Trustee, the Trust and the Servicer (as defined in Section 1.01 of the Pooling and Servicing Agreement (the
“Agreement”) dated as of April 1, 2005 among Washington Mutual Mortgage Securities Corp., as Depositor, Washington
Mutual Bank, FA as Servicer, LaSalle Bank National Association, as Trustee, and Christiana Bank & Trust Company, as Delaware
trustee) pursuant to Section 5.01(f) of the Agreement, as follows:



a.         The Buyer understands that the Rule 144A Securities have not been
registered under the 1933 Act or the securities laws of any state.



b.         The Buyer considers itself a substantial, sophisticated institutional
investor having such knowledge and experience in financial and business matters that it is capable of evaluating the merits and
risks of investment in the Rule 144A Securities.



c.         The Buyer has received and reviewed the Private Placement Memorandum
dated as of April 26, 2005 relating to the Rule 144A Securities and has been furnished with all information regarding the Rule 144A
Securities that it has requested from the Seller, the Trustee, the Company or the Servicer.



d.         Neither the Buyer nor anyone acting on its behalf has offered,
transferred, pledged, sold or otherwise disposed of the Rule 144A Securities, any interest in the Rule 144A Securities or any other
similar security to, or solicited any offer to buy or accept a transfer, pledge or other disposition of the Rule 144A Securities,
any interest in the Rule 144A Securities or any other similar security from, or otherwise approached or negotiated with respect to
the Rule 144A Securities, any interest in the Rule 144A Securities or any other similar security with, any person in any manner, or
made any general solicitation by means of general advertising or in any other manner, or taken any other action, that would
constitute a distribution of the Rule 144A Securities under the 1933 Act or that would render the disposition of the Rule 144A
Securities a violation of Section 5 of the 1933 Act or require registration pursuant thereto, nor will it act, nor has it
authorized or will it authorize any person to act, in such manner with respect to the Rule 144A Securities.



e.         The Buyer is a “qualified institutional buyer” as that term
is defined in Rule 144A under the 1933 Act and has (1) completed either of the forms of certification to that effect attached
hereto as Annex 1 or Annex 2, or (2) obtained the waiver of the Company with respect to Annex 1 and Annex 2 pursuant to
Section 5.01(f) of the Agreement. The Buyer is aware that the sale to it is being made in reliance on Rule 144A. The Buyer is
acquiring the Rule 144A Securities for its own account or the accounts of other qualified institutional buyers, understands that
such Rule 144A Securities may be resold, pledged or transferred only (i) to a person reasonably believed to be a qualified
institutional buyer that purchases for its own account or for the account of a qualified institutional buyer to whom notice is
given that the resale, pledge or transfer is being made in reliance on Rule 144A, or (ii) pursuant to another exemption from
registration under the 1933 Act.



f.          The Buyer is not affiliated with (i) the Trustee or
(ii) any Rating Agency that rated the Rule 144A Securities.



g.         If applicable, the Buyer has complied, and will continue to comply, with
the guidelines established by Thrift Bulletin 13a issued April 23, 1998, by the Office of Regulatory Activities of the Federal Home
Loan Bank System.



3.         This document may be executed in one or more counterparts and by the
different parties hereto on separate counterparts, each of which, when so executed, shall be deemed to be an original; such
counterparts, together, shall constitute one and the same document.



IN WITNESS WHEREOF, each of the parties
has executed this document as of the date set forth below.


 



                                                                                   
                                                                       



                    
Print Name of
Seller                                                    
Print Name of Buyer



By:
                                                                 
            By:
                                                                 



Name:                                                                         
Name:      



Title:
                                                                           
Title:


 



Taxpayer
Identification:
                                       
            Taxpayer Identification:
                                       



No.:
                                                                 
            No.:
                                                                


Date:
                                                                
            Date:
                                                                


 










Annex 1 to Exhibit
L



QUALIFIED
INSTITUTIONAL BUYER STATUS UNDER SEC RULE 144A



[For Buyers Other Than
Registered Investment Companies]


 



The undersigned hereby certifies as
follows in connection with the Rule 144A Investment Representation to which this Certification is attached:



1.         As indicated below, the undersigned is the President, Chief Financial
Officer, Senior Vice President or other executive officer of the Buyer.



2.         In connection with purchases by the Buyer, the Buyer is a
“qualified institutional buyer” as that term is defined in Rule 144A under the Securities Act of 1933 (“Rule
144A”) because (i) the Buyer owned and/or invested on a discretionary basis $______________________ (the Buyer
must own and/or invest on a discretionary basis at least $100,000,000 in securities unless the Buyer is a dealer, and, in that
case, the Buyer must own and/or invest on a discretionary basis at least $10,000,000 in securities) in securities
(except for the excluded securities referred to below) as of the end of the Buyer's most recent fiscal year (such amount being
calculated in accordance with Rule 144A) and (ii) the Buyer satisfies the criteria in the category marked below.



___     
Corporation, etc. The Buyer is a corporation (other than a bank, savings and loan association or similar institution),
Massachusetts or similar business trust, partnership, or charitable organization described in Section 501(c)(3) of the Internal
Revenue Code.



___     
Bank. The Buyer (a) is a national bank or banking institution organized under the laws of any State, territory or the
District of Columbia, the business of which is substantially confined to banking and is supervised by the State or territorial
banking commission or similar official or is a foreign bank or equivalent institution, and (b) has an audited net worth of at least
$25,000,000 as demonstrated in its latest annual financial statements, a copy of which is attached hereto.



___     
Savings and Loan. The Buyer (a) is a savings and loan association, building and loan association, cooperative bank,
homestead association or similar institution, which is supervised and examined by a State or Federal authority having supervision
over any such institutions or is a foreign savings and loan association or equivalent institution and (b) has an audited net worth
of at least $25,000,000 as demonstrated in its latest annual financial statements.



___     
Broker-Dealer. The Buyer is a dealer registered pursuant to Section 15 of the Securities Exchange Act of 1934.



___     
Insurance Company. The Buyer is an insurance company whose primary and predominant business activity is the writing of
insurance or the reinsuring of risks underwritten by insurance companies and which is subject to supervision by the insurance
commissioner or a similar official or agency of a State or territory or the District of Columbia.



___     
State or Local Plan. The Buyer is a plan established and maintained by a State, its political subdivisions, or any agency or
instrumentality of the State or its political subdivisions, for the benefit of its employees.



___     
ERISA Plan. The Buyer is an employee benefit plan within the meaning of Section 3(3) of the Employee Retirement Income
Security Act of 1974, as amended (“ERISA”) and is subject to the fiduciary responsibility provisions of
ERISA.



___     
Investment Adviser. The Buyer is an investment adviser registered under the Investment Advisers Act of 1940.



___     
SBIC. The Buyer is a Small Business Investment Company licensed by the U.S. Small Business Administration under Section
301(c) or (d) of the Small Business Investment Act of 1958.



___     
Business Development Company. The Buyer is a business development company as defined in Section 202(a)(22) of the Investment
Advisers Act of 1940.



___     
Trust Fund. The Buyer is a trust fund whose trustee is a bank or trust company and whose participants are exclusively (a)
plans established and maintained by a State, its political subdivisions, or any agency or instrumentality of the State or its
political subdivisions, for the benefit of its employees, or (b) employee benefit plans within the meaning of Title I of the
Employee Retirement Income Security Act of 1974, but is not a trust fund that includes as participants individual retirement
accounts or H.R. 10 plans.



3.         The term “securities” as used herein does not
include (i) securities of issuers that are affiliated with the Buyer, (ii) securities that are part of an unsold
allotment to or subscription by the Buyer, if the Buyer is a dealer, (iii) bank deposit notes and certificates of deposit,
(iv) loan participations, (v) repurchase agreements, (vi) securities owned but subject to a repurchase agreement and
(vii) currency, interest rate and commodity swaps.



4.         For purposes of determining the aggregate amount of securities owned
and/or invested on a discretionary basis by the Buyer, the Buyer used the cost of such securities to the Buyer and did not include
any of the securities referred to in the preceding paragraph. Further, in determining such aggregate amount, the Buyer may have
included securities owned by subsidiaries of the  Buyer,  but only if such subsidiaries are consolidated with the Buyer
in its financial statements prepared in accordance with generally accepted accounting principles and if the investments of such
subsidiaries are managed under the Buyer's direction. However, such securities were not included if the Buyer is a majority-owned,
consolidated subsidiary of another enterprise and the Buyer is not itself a reporting company under the Securities Exchange Act of
1934.



5.         The Buyer acknowledges that it is familiar with Rule 144A and understands
that the seller to it and other parties related to the Certificates are relying and will continue to rely on the statements made
herein because one or more sales to the Buyer may be in reliance on Rule 144A.







           
                        
           
            Will the Buyer be purchasing the Rule 144A

                               Yes 
                 
No                       
Securities only for the Buyer's own account?



6.         If the answer to the foregoing question is “no”, the Buyer
agrees that, in connection with any purchase of securities sold to the Buyer for the account of a third party (including any
separate account) in reliance on Rule 144A, the Buyer will only purchase for the account of a third party that at the time is
a “qualified institutional buyer” within the meaning of Rule 144A. In addition, the Buyer agrees that the Buyer
will not purchase securities for a third party unless the Buyer has obtained a current representation letter from such third party
or taken other appropriate steps contemplated by Rule 144A to conclude that such third party independently meets the
definition of “qualified institutional buyer” set forth in Rule 144A.



7.         The Buyer will notify each of the parties to which this certification is
made of any changes in the information and conclusions herein. Until such notice is given, the Buyer's purchase of Rule 144A
Securities will constitute a reaffirmation of this certification as of the date of such purchase.


 


 



                                                                                   
                                                                  

                                                                                                        
Print Name of Buyer



                                                                              By:
                                                                 

                                                                                   
Name:      



                                                                         
Title:

                                                                   Date:
                                                              


 










ANNEX 2 TO EXHIBIT
L



QUALIFIED INSTITUTIONAL
BUYER STATUS UNDER SEC RULE 144A



[For Buyers That Are
Registered Investment Companies]


 



The undersigned hereby certifies as
follows in connection with the Rule 144A Investment Representation to which this Certification is attached:



1.         As indicated below, the undersigned is the President, Chief Financial
Officer or Senior Vice President of the Buyer or, if the Buyer is a “qualified institutional buyer” as that term is
defined in Rule 144A under the Securities Act of 1933 (“Rule 144A”) because Buyer is part of a Family of Investment
Companies (as defined below), is such an officer of the Adviser.



2.         In connection with purchases by Buyer, the Buyer is a “qualified
institutional buyer” as defined in SEC Rule 144A because (i) the Buyer is an investment company registered under the
Investment Company Act of 1940, and (ii) as marked below, the Buyer alone, or the Buyer's Family of Investment Companies, owned at
least $100,000,000 in securities (other than the excluded securities referred to below) as of the end of the Buyer's most recent
fiscal year. For purposes of determining the amount of securities owned by the Buyer or the Buyer's Family of Investment Companies,
the cost of such securities was used.



____    The Buyer owned
$___________________ in securities (other than the excluded securities referred to below) as of the end of the Buyer's most recent
fiscal year (such amount being calculated in accordance with Rule 144A).



____    The Buyer is
part of a Family of Investment Companies which owned in the aggregate $______________ in securities (other than the excluded
securities referred to below) as of the end of the Buyer's most recent fiscal year (such amount being calculated in accordance with
Rule 144A).



3.         The term “Family of Investment Companies” as used
herein means two or more registered investment companies (or series thereof) that have the same investment adviser or investment
advisers that are affiliated (by virtue of being majority owned subsidiaries of the same parent or because one investment adviser
is a majority owned subsidiary of the other).



4.         The term “securities” as used herein does not include
(i) securities of issuers that are affiliated with the Buyer or are part of the Buyer's Family of Investment Companies, (ii) bank
deposit notes and certificates of deposit, (iii) loan participations, (iv) repurchase agreements, (v) securities owned but subject
to a repurchase agreement and (vi) currency, interest rate and commodity swaps.



5.         The Buyer is familiar with Rule 144A and understands that each of the
parties to which this certification is made are relying and will continue to rely on the statements made herein because one or more
sales to the Buyer will be in reliance on Rule 144A. In addition, the Buyer will only purchase for the Buyer's own
account.



6.         The undersigned will notify each of the parties to which this
certification is made of any changes in the information and conclusions herein. Until such notice, the Buyer's purchase of Rule
144A Securities will constitute a reaffirmation of this certification by the undersigned as of the date of such
purchase.


 




 



                                                                                   
                                                                       

                                                                                                        
Print Name of Buyer



                                                                              By:
                                                                 ____



                                                                                   
Name:      



                                                                                   
Title:



                                                                    Date:
                                                              ______



                                                                    IF AN
ADVISER:



                                                                   

                                                                       ______

                                                                                        
Print Name of Buyer



                                                                    By:
                                                                 ______



                                                                    Name:     



                                                                   
Title:



                                                                    Date:
                                                              ________



 


(SEAL)












Exhibit M






 



[Date]


[Company]



Re:       Pooling and Servicing Agreement dated as of April 1, 2005 by and among Washington
Mutual Mortgage Securities Corp., as Depositor, Washington Mutual Bank, FA, as Servicer, LaSalle Bank National Association, as
Trustee, and Christiana Bank & Trust Company, as Delaware trustee, relating to Washington Mutual Mortgage Pass-Through
Certificates, Series 2005-3


Ladies and Gentlemen:



In accordance with Section 2.07 of the
above-captioned Pooling and Servicing Agreement, the undersigned, as [Trustee] [Initial Custodian], hereby certifies that, except
as noted on the attachment hereto, as to each Mortgage Loan listed in the Mortgage Loan Schedule (other than any Mortgage Loan paid
in full or listed on the attachment hereto) it has reviewed the documents delivered to it pursuant to Section 2.05 of the Pooling
and Servicing Agreement and has determined that (i) all documents required (in the case of instruments described in clauses (X)(iv)
and (Y)(ix) of the definition of “Mortgage File,” known by it to be required) pursuant to the definition of
“Mortgage File” and Section 2.05 of the Pooling and Servicing Agreement to have been executed and received as of the
date hereof are in its possession and (ii) all such  documents have been executed and relate to the Mortgage Loans identified
in the Mortgage Loan Schedule. The [Trustee] [Initial Custodian] has made no independent examination of such documents beyond the
review specifically required in the above referenced Pooling and Servicing Agreement and has relied upon the purported genuineness
and due execution of any such documents and upon the purported genuineness of any signature thereon. The [Trustee] [Initial
Custodian] makes no representations as to: (i) the validity, legality, enforceability or genuineness of any of the documents
contained in each Mortgage File or any of the Mortgage Loans identified on the Mortgage Loan Schedule, or (ii) the collectability,
insurability, effectiveness or suitability of any such Mortgage Loan.



Capitalized words and phrases used
herein shall have the respective meanings assigned to them in the above-captioned Pooling and Servicing Agreement.


 








 



                                   
                                               
                                                                       

                                                                                   
as [Trustee] [Initial Custodian]



                                                                                 By:
                                                                 



                                                                                   
Name:



                                                                                   
Title:











                












EXHIBIT N



BENEFIT PLAN
AFFIDAVIT



LaSalle Bank
National Association, as Trustee (the “Trustee”)

135 South
LaSalle Street, Suite 1625

Chicago,
Illinois, 60603

Attention: Global Securitization Trust Services



Washington Mutual Mortgage Securities Corp. (“Washington Mutual”)

75
North Fairway Drive

Vernon Hills, IL  60061



 



RE:       CLASS [B-4] [B-5] [B-6] CERTIFICATES (THE “PURCHASED CERTIFICATES”)
ISSUED BY WASHINGTON MUTUAL MORTGAGE PASS-THROUGH

CERTIFICATES WMALT SERIES 2005-3 TRUST
(THE “TRUST”)



Under penalties of perjury, I,
_____________________, declare that, to the best of my knowledge and belief, the following representations are true, correct and
complete; and



1.         That I am the _______________ of __________________ (the
“Purchaser”), whose taxpayer identification number is  ___________, and on behalf of which I have the authority to
make this affidavit.



2.         That the Purchaser is acquiring a Purchased Certificate representing an
interest in the assets of the Trust.



3.         That the Purchaser satisfies the condition in the paragraph marked below
[mark one paragraph only]:



___      The
Purchaser is not an employee benefit plan or other plan subject to the prohibited transaction provisions of the Employee Retirement
Income Security Act of 1974, as amended, or Section 4975 of the Internal Revenue Code of 1986, as amended (a “Plan”),
or any other person (including an investment manager, a named fiduciary or a trustee of any Plan) acting, directly or indirectly,
on behalf of, or purchasing any of the Purchased Certificates with “plan assets” of, any Plan within the meaning of the
Department of Labor (“DOL”) regulation at 29 C.F.R. Section 2510.3-101.



___      The Purchaser is an insurance company, the source of funds to be used by it to acquire or
hold the Purchased Certificate is an “insurance company general account” (within the meaning of DOL Prohibited
Transaction Class Exemption (“PTCE”) 95-60), and the conditions in Sections I and III of PTCE 95-60 have been
satisfied.



___      The
Purchaser has delivered to Washington Mutual and the Trustee a Benefit Plan Opinion (as defined in Section 1.01 of the Pooling and
Servicing Agreement, dated as of April 1, 2005, by and among Washington Mutual, the Servicer, the Trustee and the Delaware Trustee
thereunder, and relating to the Trust).



 



IN WITNESS WHEREOF, the Purchaser has caused this instrument to be duly executed on its behalf, by its duly authorized officer this _____
day of __________________, 20__.


[Purchaser]



By:
                                                     


      Its:

Personally appeared before me ______________________, known or proved to me to be the same person who executed the foregoing
instrument and to be a ________________ of the Purchaser, and acknowledged to me that (s)he executed the same as his/her free act
and deed and as the free act and deed of the Purchaser.



SUBSCRIBED and SWORN to before me this
day of ____________, 20__.



                                                                                   


            Notary Public










Exhibit O



BENEFIT PLAN
AFFIDAVIT



LaSalle Bank
National Association, as Trustee (the “Trustee”)

135 South
LaSalle Street, Suite 1625

Chicago,
Illinois, 60603

Attention: Global Securitization Trust Services



Washington Mutual Mortgage Securities Corp. (“Washington Mutual”)

75
North Fairway Drive

Vernon Hills, IL  60061



 



RE:       CLASS [B-1] [B-2] [B-3] CERTIFICATES (THE “PURCHASED CERTIFICATES”)
ISSUED BY WASHINGTON MUTUAL MORTGAGE PASS-THROUGH

CERTIFICATES WMALT SERIES 2005-3 TRUST
(THE “TRUST”)



Under penalties of perjury, I,
_____________________, declare that, to the best of my knowledge and belief, the following representations are true, correct and
complete; and



1.         That I am the _______________ of __________________ (the
“Purchaser”), whose taxpayer identification number is  ___________, and on behalf of which I have the authority to
make this affidavit.



2.         That the Purchaser is acquiring a Purchased Certificate representing an
interest in the assets of the Trust.



3.         That the Purchaser satisfies the condition in the paragraph marked below
[mark one paragraph only]:



___
     The Purchaser is not an employee benefit or other plan subject to the prohibited transaction provisions of
the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), or Section 4975 of the Internal Revenue Code
of 1986, as amended (a “Plan”), or any other person (including an investment manager, a named fiduciary or a trustee of
any such Plan) acting, directly or indirectly, on behalf of or purchasing the Purchased Certificate with “plan assets”
of, any Plan within the meaning of the Department of Labor (“DOL”) regulation at 29 C.F.R. Section
2510.3-101.



___      The Purchaser is an insurance company, the source of funds to be used by it to acquire or
hold the Purchased Certificate is an “insurance company general account” (within the meaning of DOL Prohibited
Transaction Class Exemption (“PTCE”) 95-60), and the conditions in Sections I and III of PTCE 95-60 have been
satisfied.



___      The Purchased Certificate was rated “BBB-” or better (or its equivalent) by at
least one of the Rating Agencies (as defined in Section 1.01 of the Pooling and Servicing Agreement (the “the Pooling and
Servicing Agreement”), dated as of April 1, 2005, by and among Washington Mutual, the Servicer, the Trustee and the Delaware
Trustee thereunder, and relating to the Trust) at the time of Purchaser’s acquisition of the Purchased Certificate (or
interest therein).



                ___      The
Purchaser has delivered to Washington Mutual and the Trustee a Benefit Plan Opinion (as defined in Section 1.01 of the Pooling and
Servicing Agreement).



IN WITNESS WHEREOF, the Purchaser has caused this instrument to be duly executed on its behalf, by its duly authorized officer this _____
day of __________________, 20__.


[Purchaser]



By:
                                                     


      Its:




Personally appeared before me ______________________, known or proved to me to be the same person who executed the foregoing
instrument and to be a ________________ of the Purchaser, and acknowledged to me that (s)he executed the same as his/her free act
and deed and as the free act and deed of the Purchaser.



SUBSCRIBED and SWORN to before me this
day of ____________, 20__.



                                                                                   

           
Notary Public