FEDERAL NATIONAL MORTGAGE ASSOCIATION. in its corporate capacity and in its capacity as Trustee MASTER TRUST AGREEMENT. for Q-REMIC INTERESTS

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1 EXECUTION VERSION FEDERAL NATIONAL MORTGAGE ASSOCIATION in its corporate capacity and in its capacity as Trustee MASTER TRUST AGREEMENT for Q-REMIC INTERESTS May 1, 2018

2 TABLE OF CONTENTS ARTICLE I DEFINED TERMS AND RULES OF CONSTRUCTION...1 Section General Definitions....1 Section Rules of Construction....5 ARTICLE II THE TRUSTS; APPLICABLE DOCUMENTATION; CERTAIN REMIC MATTERS...7 Section Exchanges with I-Trust Trustee....7 Section Establishment of Reserve Fund and Issuance of Q-REMIC Interests to Fannie Mae....7 Section [Reserved.]...8 Section [Reserved.]...8 Section Prohibition Against Encumbrance....8 Section [Reserved.]...8 Section Issue Supplement....8 Section Issue Supplement and Trust Agreement....8 Section [Reserved.]...8 Section [Use of Information....8 Section [Reserved.]...9 Section Trust Administration Fee....9 Section Payment for Services to Trusts....9 Section Certain REMIC Matters....9 ARTICLE III REMIC DECLARATIONS; RESERVE FUND...10 Section Q-REMICs Section Q-REMIC Credit Enhancement; Reserve Fund Investments Section Residual Interests Section Uncertificated Interests i

3 Section Q-REMIC Distributions Section Accrual of Interest on Q-REMIC Interests ARTICLE IV [RESERVED]...14 ARTICLE V [RESERVED]...14 ARTICLE VI TRANSFERS OF Q-REMIC INTERESTS; RESIDUAL INTERESTS...14 Section [Reserved.]...14 Section Registration and Registration of Transfer of Q-REMIC Interests Section [Reserved.]...15 Section Persons Deemed Owners of Q-REMIC Interest Section Maintenance of Office or Agency for the Q-REMIC Interests Section [Reserved.]...16 ARTICLE VII LIMITATION OF LIABILITY...16 Section General Limitation Section Measure of Liability Section Acts of Parties ARTICLE VIII FANNIE MAE...17 Section Merger or Consolidation Section [Reserved.]...17 ARTICLE IX TRUSTEE...17 Section Duties of Trustee Section Liability Section Certain Matters Affecting the Trustee Section [Reserved.]...20 Section Eligibility Requirements for Trustee Section Resignation and Removal of Trustee ii

4 Section Acceptance of Appointment by Successor Trustee Section Merger or Consolidation of Trustee Section Appointment of Co-Trustee or Separate Trustee Section Successor Trustee Fee ARTICLE X [RESERVED]...23 ARTICLE XI TRUST TERMINATION...23 Section Trust Termination Section Notice of Trust Termination ARTICLE XII AMENDMENTS...24 Section [Reserved.]...24 Section Amendments to Q-Trust Documents Section Permissible Without Action by Holders Section Waivers and Amendments with Consent of Q-REMIC Interest Holder Section Amendment Relating to Transfers to Disqualified Organizations Section Documentation of Amendment ARTICLE XIII MISCELLANEOUS...25 Section [Reserved.]...25 Section Governing Law Section Assignment Section Demands, Notices, Communications Section Severability of Provisions Section Authorized Officers and Signatures EXHIBIT A FORM OF ISSUE SUPPLEMENT EXHIBIT B FORM OF RESERVE FUND PROMISSORY NOTE EXHIBIT C FORM OF TRANSFER AFFIDAVIT iii

5 MASTER TRUST AGREEMENT THIS MASTER TRUST AGREEMENT is executed by Federal National Mortgage Association ( Fannie Mae ) in its corporate capacity and in its capacity as Trustee. RECITALS A. Fannie Mae is a corporation organized and existing pursuant to the Charter Act, and has full corporate authority and power to enter into, and to undertake the obligations set forth in, this Trust Agreement. B. Fannie Mae intends to set aside and transfer mortgage loans to trusts created from time to time under the MBS Master Trust Agreement. C. Fannie Mae intends to cause the MBS trustee to assign beneficial interests in certain principal and interest payments on such mortgage loans to the I-Trust Trustee in exchange for corresponding beneficial interests in such mortgage loan payments. D. Fannie Mae intends from time to time to cause the I-Trust Trustee to assign certain beneficial interests in such mortgage loan payments to the Trustee in exchange for corresponding beneficial interests as provided in this Trust Agreement. E. Fannie Mae further intends to establish for each Trust a reserve fund and to make an initial deposit therein in exchange for certain Q-REMIC Interests as provided in this Trust Agreement. F. Fannie Mae intends to treat all or a portion of each Trust Fund as one or more REMICs. G. Fannie Mae intends to act as Trustee for each Trust. NOW, THEREFORE, the parties to this Trust Agreement, in the respective capacities hereinabove set forth, do hereby declare and establish this Trust Agreement and do hereby undertake and otherwise agree as follows: ARTICLE I DEFINED TERMS AND RULES OF CONSTRUCTION Section General Definitions. Capitalized terms used and not defined in this Trust Agreement will have the meanings given to those terms in the I-Trust Master Trust Agreement. Whenever used in this Trust Agreement, the following words and phrases will have the following meanings: Adverse REMIC Event: Either (i) termination of the REMIC status of any group of assets identified as a REMIC in the Q-Trust Documents or (ii) imposition of a tax, including the tax on prohibited transactions as defined in Section 860F(a)(2) of the Code and the tax on 1

6 contributions to a REMIC set forth in section 860G(d) of the Code, on any REMIC created under the Q-Trust Documents. Amendment: A document that amends or supplements this Trust Agreement or an Issue Supplement. Effective Date: May 1, Eligible Investment: holdings: Any one or more of the following obligations, securities or (i) (ii) (iii) (iv) (v) (vi) (vii) (viii) (ix) obligations of, or obligations guaranteed as to the full and timely payment of principal and interest by, the United States; obligations of any agency or instrumentality of the United States that have a longterm rating or a short-term rating, as applicable, from S&P or from Moody s, in either case in one of its two highest ratings categories for long-term securities or in its highest ratings category for short-term securities; certificates of deposit, time deposits and bankers acceptances of any depository institution or trust company, provided that the short-term securities of the depository institution or trust company are rated by S&P or Moody s in the highest applicable ratings category for short-term securities; commercial paper of any corporation that is rated by S&P or Moody s in its highest short-term ratings category; asset-backed commercial paper that is rated by S&P or Moody s in its highest short-term ratings category; debt securities that have a long-term rating or a short-term rating, as applicable, from S&P or from Moody s, in either case in one of its two highest ratings categories for long-term securities or in its highest ratings category for short-term securities; money market funds that are rated by S&P or Moody s in one of its two highest ratings categories for money market funds; discount notes and other short-term debt obligations issued by Fannie Mae, the Federal Home Loan Banks, the Federal Farm Credit Bank or another entity that is an agency or instrumentality of the United States, provided that the issuer then has a long-term rating or short-term rating, as applicable, from S&P or Moody s, in either case in one of its two highest ratings categories for long-term securities or in its highest ratings category for short-term securities; repurchase agreements on obligations that are either specified in any of clauses (i), (ii) or (vi) above or are mortgage-backed securities insured or guaranteed by Fannie Mae or another entity that is an agency or instrumentality of the United 2

7 States; provided, that the counterparty to the repurchase agreement is an entity whose short-term debt securities are rated by S&P or Moody s in its highest ratings category for short-term securities; and (x) any other investment that is approved by the Fannie Mae and is rated in one of the two highest ratings categories of the applicable rating agency for long-term securities or the highest ratings category of the applicable rating agency for shortterm securities. In each case in which a rating level is required, if the relevant securities, issuer or fund is rated by both S&P and Moody s, both such ratings must meet the stated rating level in order for the requirement to be satisfied. The rating level will be construed as provided in Subsection 1.2(11) of the MBS Master Trust Agreement and, accordingly, will not be satisfied by a rating that is the minimum rating followed by a minus sign. Final Q-REMIC Distribution Date: With respect to any Q-REMIC, the date, calculated as of the Startup Day of the Q-REMIC, that is the latest Final I-REMIC Distribution Date of any of the I-REMIC Interests held by such Q-REMIC. Initial Deposit Amount: Supplement. As to any Q-REMIC, as specified in the related Issue Interest-Only Interest: As to each Q-REMIC, any Q-REMIC Interest designated as such in the related Issue Supplement. Interest-Only Optimal Rate: As to each Interest-Only Interest, as specified in the related Issue Supplement. Issue Date: As to any Trust, as specified in the related Issue Supplement. Issue Supplement: Any one or more physical or electronic documents or records (signed or unsigned) prepared by Fannie Mae as provided in Section 2.07 that, together with this Trust Agreement, documents the establishment of a Trust, as such documents or records may be amended from time to time. An Issue Supplement may be comprised of a document or record in substantially the form appended to this Trust Agreement as Exhibit A or such other form as Fannie Mae may designate from time to time. I-Trust: A trust created pursuant to the I-Trust Master Trust Agreement. I-Trust Issue Supplement: Any Issue Supplement as defined in the I-Trust Master Trust Agreement. I-Trust Master Trust Agreement: That certain master trust agreement relating to the I- Trusts, dated the date hereof, as the same may be amended, modified or otherwise supplemented from time to time, by Fannie Mae in its corporate capacity and as trustee. I-Trust Trustee: Fannie Mae, in its capacity as trustee for any related I-Trust, and its successors and assigns in such capacity. 3

8 MBS Guarantor: The Guarantor as defined in the MBS Master Trust Agreement. MBS Guaranty: Any Guaranty as defined in the MBS Master Trust Agreement. MBS Guaranty Fee: Agreement. Any Guaranty Fee as defined in the MBS Master Trust MBS Guaranty Payment: Any payment required to be made by the MBS Guarantor under the MBS Guaranty (without regard to any advance required to be made by Fannie Mae hereunder). One-Month LIBOR: As to any Q-REMIC, as specified in the related Issue Supplement. Q-REMIC: Any Q-REMIC formed hereunder. Q-REMIC Credit Enhancement Fee: As defined in Section 3.05(b). Q-REMIC Interest: An uncertificated interest issued pursuant to the related Q-Trust Documents, maintained in the name of a record owner as an entry on the books of the Q-REMIC Interest Registrar under a designation specifying the interest and denomination thereof, and representing the right to receive principal, interest or both, in each case to the extent set forth therein. Each Q-REMIC Interest will be designated as either a Regular Interest or a Residual Interest and will be deemed to have been issued on the Startup Day of the related Q-REMIC. Q-REMIC Interest Balance: With respect to any Q-REMIC Interest, as specified in the related Issue Supplement. Q-REMIC Interest Holder: As to any Q-REMIC Interest, the Person in whose name that Q-REMIC Interest is registered in the Q-REMIC Interest Register maintained by the Q-REMIC Interest Registrar. Q-REMIC Interest Rate: With respect to any Q-REMIC Interest, as specified in the related Issue Supplement. Q-REMIC Interest Register: As defined in Section 6.02(a). Q-REMIC Interest Registrar: The registrar, which will initially be the Trustee, appointed hereunder to act in such capacity. Q-REMIC Mirror Interest: As defined in Section 3.01(b)(i). Q-REMIC Subordinate Principal Distribution Amount: For any Q-REMIC and any Distribution Date, an amount equal to the principal payment, if any, required to be paid on the related CAS Notes on the next succeeding payment date for such CAS Notes, as determined by the related Q-R Interest Holder and, to the extent permitted by the Regulations, any additional amount as determined in the sole discretion of such Q-R Interest Holder. 4

9 Q-Trust Documents: As to any Trust, only this Trust Agreement, the related Issue Supplement and any Amendment related to either of them. Q-R Interest: As defined in Section 3.01(b)(v). Q-R Interest Holder: The Q-REMIC Interest Holder of a Q-R Interest. Q-Trust Documents: As to any Trust, only this Trust Agreement, the related Issue Supplement and any Amendment related to either of them. Related MBS Trust: As to a Q-REMIC, each MBS Trust relating to the Lower Tier I- REMIC Mirror Interests held in such Q-REMIC. Reserve Fund: The reserve fund established by the Trustee pursuant to Section Settlement Date: As to any Trust, as specified in the related Issue Supplement. Startup Day: As to any Q-REMIC, as specified in the related Issue Supplement. Subordinate Interest: As to any Q-REMIC, the Q-REMIC Interest designated as such in the related Issue Supplement. Trust: A trust created pursuant to the Q-Trust Documents. Trust Administration Fee: Any fee payable pursuant to Section 2.12 as compensation for services to the Trusts. Trust Agreement: This Master Trust Agreement, as the same may be amended, modified or otherwise supplemented from time to time, by Fannie Mae in its corporate capacity and in its capacity as trustee. Trustee: With respect to any Trust, Fannie Mae, in its capacity as trustee, its successors or assigns, which will have the responsibilities specified in the related Q-Trust Documents. Trustee Events of Default: As defined in 9.06(b)(ii). Trust Fund: As to any Trust, any Lower Tier I-REMIC Mirror Interests assigned thereto and held therein, together with the related Reserve Fund. Section Rules of Construction. The rules of construction set forth in this Section 1.02 apply to the Q-Trust Documents. (a) Singular and Plural; Gender. The singular form of any word includes the plural, and vice versa, unless the context otherwise requires. The use of a pronoun of one gender includes correlative words of the other gender and neuter words, and the use of a neuter term includes words of both genders. 5

10 (b) Sections and Other Subdivisions. All references to Articles, Sections and other subdivisions (unless stated to be of a document other than this Trust Agreement) are to the corresponding Articles, Sections and other subdivisions of this Trust Agreement; and the words in this Trust Agreement, of this Trust Agreement, under this Trust Agreement, of the Trust Agreement, and other words of similar import refer to this Trust Agreement as a whole and not to any particular Article, Section or other subdivision, unless specified. (c) Headings and Examples. Any captions, headings or titles of the various Articles, Sections and other subdivisions (including the numbering of them), and the table of contents, are solely for convenience of reference, and none of them limits or otherwise affects the meaning, construction or effect of the Q-Trust Documents or describes the scope or intent of any provision. In addition, any examples are included by way of illustration and not limitation. (d) Recitals. Each of the recitals set forth at the outset of this Trust Agreement is deemed a statement by Fannie Mae as to the purpose and scope of the various Trusts and its roles with respect to those Trusts, as further defined and limited in the Q-Trust Documents. (e) Written Statements. Every request, order, demand, appointment, notice, statement, certificate, consent, direction or similar action by any party will be in writing, which includes an electronic transmission of a writing or posting in an electronic medium. (f) Counsel; Accountants. All references to counsel, attorneys or the like mean and include counsel employed or engaged by Fannie Mae, whether or not suit is instituted; and all references to fees of such persons include fees and disbursements preparatory to and during trial and appeal and in any bankruptcy or arbitration proceedings, as well as advice relating to the application or interpretation of the Q-Trust Documents. All references to accountants or the like mean and include accountants employed or engaged by Fannie Mae. In determining compliance with accounting standards, the opinion of the accountants employed by Fannie Mae will be conclusive. (g) Inclusionary Language. Whenever the word includes or including is used, such word means includes or including by way of example and not limitation. (h) Fannie Mae. As defined in Section 1.01, any reference to Fannie Mae means Fannie Mae in one or more of its corporate capacities, as specified or as provided in context, and not in its capacity as Trustee unless expressly provided otherwise. A successor to Fannie Mae means a Person that succeeds to the entire business or the relevant portion of the business of Fannie Mae, by merger, reorganization or purchase of all or substantially all of the assets, or a Person that succeeds to Fannie Mae in the applicable capacity under this Trust Agreement. (i) Individual Trusts. With respect to each Trust, and unless expressly stated otherwise, the provisions of the Q-Trust Documents will be interpreted as referring only to the Trust and the Trust Fund related to that Trust. (j) Changes in Laws. Whenever a statute, regulation, governmental body, accounting standard or accounting body is identified in this Trust Agreement, the reference includes any modification of, successor to or renamed statute, regulation, governmental body, accounting standard or accounting body. 6

11 (k) Delegates, Agents, Successors and Assigns. Whenever a Person is referenced in the Q-Trust Documents, and except as provided in Section 1.02(h) with respect to Fannie Mae, the reference includes that Person s successors and assigns, by merger, acquisition, operation of law, reorganization, inheritance or similar occurrence, as well as any Person who succeeds in the relevant capacity pursuant to the terms of the Q-Trust Documents. A successor to any governmental unit referenced in the Q-Trust Documents includes a governmental unit that is created or charged with carrying out substantially the same functions as the referenced governmental unit. A Person may exercise any of the rights or powers granted to it or perform any duties under the Q-Trust Documents either directly or by or through agents or attorneys. (l) Substantial Compliance. Any administrative practice adopted, implemented, changed or discontinued by the Trustee in order to accommodate administrative practices or processes (including systems limitations) will be considered to be consistent with this Trust Agreement and expectations of a reasonable investor in mortgage-backed securities if such practice achieves substantial compliance in all material respects with this Trust Agreement. (m) Will. Whenever the word will is used as a verb, such word means that an obligation is imposed and is not intended merely as an expression of the future tense. (n) Court. Whenever the word court is used, such word means a court of competent jurisdiction. ARTICLE II THE TRUSTS; APPLICABLE DOCUMENTATION; CERTAIN REMIC MATTERS Section Exchanges with I-Trust Trustee. The Trustee hereby agrees that, immediately upon each assignment of Lower Tier REMIC Mirror Interests by the I-Trust Trustee, the Trustee will (i) accept from the I-Trust Trustee the Lower Tier REMIC Mirror Interests so assigned to be held in trust as part of the related Trust Fund for the exclusive benefit of the related Q-REMIC Interest Holders; (ii) set aside, transfer, assign, set over and otherwise convey to the I-Trust Trustee the corresponding Q- REMIC Mirror Interests in that Trust; and (iii) instruct the Q-REMIC Interest Registrar to register the assignment of Q-REMIC Mirror Interests pursuant to Section Section Establishment of Reserve Fund and Issuance of Q-REMIC Interests. The Trustee hereby agrees that, immediately upon each assignment of Lower Tier REMIC Mirror Interests by the I-Trust Trustee, the Trustee will: (i) establish the Reserve Fund; (ii) accept the related Initial Deposit Amount deposited by or on behalf of Fannie Mae into the Reserve Fund, to be held in trust as part of the related Trust Fund for the exclusive benefit of the related Q-REMIC Interest Holders; (iii) issue in the name of Fannie Mae or its designee the Subordinate Interest and the Interest-Only Interest; and (iv) instruct the Q-REMIC Interest Registrar to register the issuance to Fannie Mae or its designee of the Subordinate Interest and the Interest-Only Interest pursuant to Section The Trustee further agrees that it will instruct 7

12 the Q-REMIC Interest Registrar to register any subsequent transfer of the Subordinate Interest or the Interest-Only Interest by Fannie Mae or its designee pursuant to Section Section [Reserved.] Section [Reserved.] Section Prohibition Against Encumbrance. Except as may otherwise be provided expressly in the Q-Trust Documents, neither Fannie Mae nor the Trustee will, directly or indirectly, assign, sell, dispose of or transfer all or any portion of or interest in any Trust Fund, or permit all or any portion of any Trust Fund to be subject to any lien, claim, mortgage, security interest, pledge or other encumbrance of any other Person. Section [Reserved.] Section Issue Supplement. An Issue Supplement documents the establishment of a particular Trust and the related Q-REMIC Interests. Fannie Mae will prepare and maintain for each Trust a schedule identifying the Lower Tier I-REMIC Mirror Interests and designating the Initial Deposit Amount to be deposited in a particular Trust, which may be in an electronic format and if in electronic format will be deemed attached to the Issue Supplement. If for any reason the creation of an Issue Supplement is delayed, Fannie Mae will create one as soon as practicable, and such delay will not affect the validity or existence of the Trust or the related Q-REMIC Interest. Any one or more physical or electronic documents or records (signed or unsigned) made in the ordinary course that conclusively identify the related Lower Tier I-REMIC Mirror Interests as being part of the Trust Fund and designating the Initial Deposit Amount will be deemed to be an Issue Supplement for purposes of documenting the establishment of the related Trust. Section Issue Supplement and Trust Agreement. With respect to each Trust, the collective terms of the Q-Trust Documents will govern the Q-REMIC Interests related to such Trust and all matters related thereto, and will have no applicability to any other Trust or Q-REMIC Interests. As applied to each Trust, the collective terms of the Q-Trust Documents will constitute an agreement as if the collective terms of those instruments were set forth in a single instrument. In the event of a conflict between the terms of this Trust Agreement and the terms of an Issue Supplement for a Trust, the terms of the Issue Supplement will control with respect to that Trust. An Issue Supplement is not considered an Amendment requiring approval pursuant to Article XII. Section [Reserved.] Section [Use of Information. Fannie Mae, in each of its capacities, retains or is and will be granted, as applicable, on a nonexclusive basis, any and all licenses and rights to store, reproduce, edit, analyze, distribute 8

13 and use in any manner all or part of information or data contained in any records and documentation regarding the Q-REMIC Interests and all accounts and other matters relating to Trusts under the Q-Trust Documents. Assignees and successors of Fannie Mae and the Trustee are and will be granted, on a nonexclusive basis, any and all licenses and rights to store, reproduce, edit, analyze, distribute and use all or part of such information or data for the purpose of carrying out their respective functions.] Section [Reserved.] Section Trust Administration Fee. The Trustee will be entitled to such compensation as may be determined from time to time by the parties hereto. As long as Fannie Mae is the Trustee for all Trusts under this Trust Agreement, any Trust Administration Fee will be determined in the aggregate and not for each Trust separately. A fee for any successor Trustee will be established as provided in Section Section Payment for Services to Trusts. In order that services to the Trusts will be provided, fees and expenses payable under the Q-Trust Documents for a Trust are payable prior to any distribution to Q-REMIC Interest Holders. Section Certain REMIC Matters. (a) [Reserved.] (b) The Trustee covenants and agrees that it will: (i) prepare, sign and file, or arrange to be prepared, signed and filed, when and as required by the Code and the Regulations, a federal income tax return using a calendar year as the taxable year for each Q-REMIC, (ii) conduct the affairs of each such Q-REMIC so as to maintain its status as a REMIC under the Code, (iii) not knowingly or intentionally take any action or omit to take any action that would result in an Adverse REMIC Event, and (iv) hold harmless and indemnify the Q-R Interest Holder against any liability on account of any federal income tax (including interest and penalties) imposed on such REMIC (or applicable portion thereof) to the extent that any such tax is paid or payable by such Q- R Interest Holder. (c) The Trustee will act as the tax matters person for each Q-REMIC in a fiduciary capacity for each Q-REMIC Interest Holder. For any taxable years for which Sections 6221 through 6241 of the Code apply to a Trust (or portion of a Trust) as to which a REMIC election is made, the Trustee will be the partnership representative for each such REMIC. For each such REMIC, the Trustee, as partnership representative, is authorized and directed to utilize any exceptions available under Sections 6221 through 6241 of the Code (including changes) so that Q- R Interest Holders in such REMIC, to the fullest extent possible, rather than the REMIC itself, will be liable for any taxes arising from audit adjustments to the REMIC s taxable income. In connection with the preceding sentence, the partnership representative will, to the extent any such REMIC is eligible, make the election under Section 6221(b) of the Code with respect to each such REMIC and take any other action such as disclosures and notifications necessary to effectuate such election. If the election described in the preceding sentence is not available, to the extent 9

14 applicable, the partnership representative will make the election under Section 6226(a) of the Code with respect to each such REMIC and take any other action such as filings, disclosures and notifications necessary to effectuate such election. Consistent with the foregoing, the Trustee is authorized, in its sole discretion, to make any available election related to Sections 6221 through 6241 of the Code and take any action it deems necessary or appropriate to comply with the requirements of the Code and conduct each such REMIC s affairs under Sections 6221 through 6241 of the Code. In addition, the Trustee will provide, or cause to be provided, to the Q-REMIC Interest Holders any information or reports regarding the Q-REMICs that may be required under the Code. Furthermore, the Trustee will provide to the Internal Revenue Service and to persons described in section 860E(e)(3) and (6) of the Code the information described in section 1.860D- 1(b)(5)(ii) of the Regulations, or any successor regulation thereto. Such information will be provided in the manner described in section 1.860E-2(a)(5) of the Regulations, or any successor regulation thereto. (d) Any inconsistencies or ambiguities in the Q-Trust Documents for a Q-REMIC will be resolved in a manner that preserves the validity of any related REMIC election. (e) Notwithstanding anything herein to the contrary: (i) The Trustee will not take any action or fail to any action that would (A) cause any MBS Trust to be treated as other than a fixed investment trust under the Code and the Regulations or (B) adversely affect the federal income tax characterization of the Certificates as described in the related Prospectus. (ii) No REMIC election made hereunder will be terminated and no Q- REMIC will be liquidated, in either case, at any time the related Certificates or CAS Notes remain outstanding, unless no beneficial owner of a Certificate or CAS Note would be adversely affected thereby. Section Q-REMICs. ARTICLE III REMIC DECLARATIONS; RESERVE FUND (a) For each Trust created under this Trust Agreement, the Trustee will make one REMIC election with respect to the Lower Tier I-REMIC Mirror Interests held in the Trust. (b) Except as otherwise provided in the applicable Issue Supplement: (i) Each Q-REMIC will designate a Q-REMIC Interest as a Regular Interest in respect of each Lower Tier I-REMIC Mirror Interest held in the Trust (each such Regular Interest, a Q-REMIC Mirror Interest ). (ii) Each Q-REMIC will provide for a Reserve Fund, which will be an asset of such Q-REMIC. With respect to each Q-REMIC, the Trustee will establish and maintain in its name, as Trustee, a Reserve Fund, which will be a segregated fund held as 10

15 an asset of the Trust. Amounts in the Reserve Fund will be applied as provided in Section Interest. Interest. (iii) (iv) Each Q-REMIC will designate a Subordinate Interest as a Regular Each Q-REMIC will designate an Interest-Only Interest as a Regular (v) Each Q-REMIC will designate a Q-REMIC Interest (a Q-R Interest ) as the sole Residual Interest in the Q-REMIC. (vi) Solely for purposes of satisfying Section 1.860G-1(a)(4)(iii) of the Regulations, the latest possible maturity date of each Q-REMIC Interest in a Q-REMIC will be the Final Q-REMIC Distribution Date of such Q-REMIC. Section Q-REMIC Credit Enhancement; Reserve Fund Investments. (a) Notwithstanding anything herein to the contrary, on each Distribution Date with regard to any Q-REMIC, Fannie Mae will be required to advance (i) distributions on the related Q- REMIC Mirror Interests in an amount equal to the amount of any MBS Guaranty Payments required to be made with respect to the Related MBS Trust and (ii) distributions on each Interest- Only Interest to the extent amounts are not otherwise available therefor. Fannie Mae will be permitted to recover the amount of any such advance to the extent provided in Section In keeping with the foregoing, the parties hereto intend that, for purposes of assessing Fannie Mae s exposure to the risk of loss arising from required advances hereunder, Fannie Mae s ability to recover amounts from the Reserve Fund will be considered. (b) Section 3.05(b). Fannie Mae is entitled to the Q-REMIC Credit Enhancement Fee, as provided in (c) At its option, Fannie Mae may deliver the Initial Deposit Amount in the form of one or more promissory notes issued by Fannie Mae and payable in cash on demand to the obligor thereof. Each such promissory note will be issued in substantially the form attached as Exhibit B hereto, and will otherwise be treated as an amount held in the Reserve Fund and subject to all provisions hereto applicable to amounts held in the Reserve Fund. (d) Amounts in the Reserve Fund may be invested by the Trustee in Eligible Investments. All income earned, net of losses incurred (which losses will be reimbursed to the Q- REMIC by the Trustee), on the investment of funds on deposit in the Reserve Fund will be held as part of the Reserve Fund. Section Residual Interests. (a) Unless otherwise specified in the applicable Issue Supplement, the Residual Interest in each Q-REMIC will initially be held by Fannie Mae in its corporate capacity. In addition, the Residual Interest in each Q-REMIC may not be transferred by Fannie Mae unless: 11

16 (i) Fannie Mae is no longer permitted to hold such Residual Interest; or (ii) Fannie Mae determines that a transfer would not result in an Adverse REMIC Event and would not adversely affect any holder of a Certificate or a CAS Note. (b) Any transfer of record or beneficial ownership, direct or indirect (whether pursuant to a purchase, a default under a secured lending agreement or otherwise), by Fannie Mae of a Residual Interest in any Q-REMIC, or any beneficial interest therein, will be subject to such provisions as reasonably required by Fannie Mae to ensure that such transfer and any future transfer of such Residual Interest will not result in an Adverse REMIC Event and will not adversely affect any holder of a Certificate or a CAS Note. Section Uncertificated Interests. The Q-REMIC Interests will be issued in uncertificated form and will be maintained in the names of the record owners thereof as entries on the books of the Q-REMIC Interest Registrar. No Person acquiring a beneficial ownership interest in any Q-REMIC Interests will be entitled to receive a physical certificate representing such ownership interest. A Q-REMIC Interest will be deemed to have been issued, and a Q-REMIC Interest Holder will be deemed to have accepted such Q-REMIC Interest, pursuant to the entry of such Q-REMIC Interest Holder s name on the related Q-REMIC Interest Register with respect to such Q-REMIC Interest. Section Q-REMIC Distributions. (a) On each Distribution Date, an amount equal to the aggregate of the Certificate Distribution Amounts for such Distribution Date with respect to the Related MBS Trusts will be allocated among the Q-REMIC Interests in any Q-REMIC in the following order of priority: first, to each Q-REMIC Mirror Interest, the interest accrued on each Q-REMIC Mirror Interest, pro rata, based on the respective amounts accrued on each such Q- REMIC Mirror Interest; second, to each Q-REMIC Mirror Interest in reduction of the principal balance thereof until reduced to zero, an amount equal to the portion of the Certificate Principal Distribution Amount for such Distribution Date allocable to the Mortgage Loan to which it corresponds; and third, any remaining amount, to the Q-R Interest issued by such Q-REMIC. (b) On each Distribution Date, an amount equal to the aggregate of the MBS Guaranty Fees for the related Mortgage Loans to the extent payable to the MBS Guarantor for such Distribution Date will be paid in the following manner and order of priority: first, to the Interest-Only Interest, the interest accrued thereon, which will be paid by Fannie Mae to the holder thereof; and second, any remaining amount (such amount, the Q-REMIC Credit Enhancement Fee ), to Fannie Mae. 12

17 (c) On each Distribution Date, the amounts in the Reserve Fund (after taking into account distributions therefrom described in Section 3.05(e)) will be distributed in the following order of priority: first, to the Subordinate Interest, the interest accrued thereon during the related Interest Accrual Period; second, the Q-REMIC Subordinate Principal Distribution Amount to the Subordinate Interest in reduction of the principal balance thereof until reduced to zero; and third, to the extent directed by the Q-R Interest Holder in such Q-REMIC, to the Q-R Interest issued by such Q-REMIC. (d) The Q-R Interest Holder will determine the Q-REMIC Subordinate Principal Distribution Amount on each Distribution Date for the related Q-REMIC such that, on or prior to the termination of such Q-REMIC, the aggregate of the Q-REMIC Subordinate Principal Distribution Amounts for the related Q-REMIC will equal the excess of (i) the Initial Deposit Amount over (ii) the sum of the amount of all withdrawals permitted pursuant to Section 3.05(e). For any Distribution Date, the Q-R Interest Holder will provide its determination of the Q-REMIC Subordinate Principal Distribution Amount for the related Q-REMIC to the Trustee no later than [three (3)] Business Days prior to such Distribution Date. Absent any determination of the Q- REMIC Subordinate Principal Distribution Amount for a Q-REMIC, no Q-REMIC Subordinate Principal Distribution Amount will be distributed with respect to such Distribution Date. (e) From time to time, and only if so directed by the Q-R Interest Holder for the related Q-REMIC, the Trustee will cause to be withdrawn from the Reserve Fund an amount, determined by such holder, to pay to Fannie Mae as follows: first, to the extent so directed by the Q-R Interest Holder, an amount up to the sum of (i) any amount that Fannie Mae would be required to advance with respect to such Q-REMIC pursuant to Section 3.02(a) on the next succeeding Distribution Date (which amount will be included in the allocations made pursuant to Section 3.05(a) on such Distribution Date), and (ii) the amount of any advances made by Fannie Mae with respect to such Q-REMIC pursuant to Section 3.02(a) and not previously paid under this Section 3.05(e); and second, for any other purpose for which the Regulations would permit a qualified reserve fund as defined in Section 860G(a)(7)(B) of the Code to be used and to the extent permitted thereunder; provided, that in each case the Q-R Interest Holder will calculate the amount, if any, to be withdrawn in a manner that, in its sole discretion, properly reflects the loss coverage provisions applicable to any related CAS Notes. (f) Amounts in the Reserve Fund will be used for no purpose other than as set out in this Section

18 Section Accrual of Interest on Q-REMIC Interests. Interest will accrue on the Q-REMIC Interest Balance of each Q-REMIC Interest during the related Interest Accrual Period at the applicable Q-REMIC Interest Rate. The total amount of interest allocated or distributed in respect of any Q-REMIC Interest on any Distribution Date will be equal to one month s interest at the applicable Q-REMIC Interest Rate on the Q-REMIC Interest Balance thereof. For purposes of calculating the accrual of interest with respect to each Subordinate Interest and any Interest Accrual Period, the related Q-REMIC Interest Balance will be deemed to adjust at the beginning of such Interest Accrual Period. All computations of interest accrued on any Q-REMIC Interest will be made as if each year consisted of twelve months of thirty days each. ARTICLE IV [Reserved] ARTICLE V [Reserved] ARTICLE VI TRANSFERS OF Q-REMIC INTERESTS; RESIDUAL INTERESTS Section [Reserved.] Section Registration and Registration of Transfer of Q-REMIC Interests. (a) The Trustee will cause to be kept at the office or agency to be maintained by it pursuant to Section 6.05, a register (the Q-REMIC Interest Register ) in which, subject to such reasonable regulations as it may prescribe, the Trustee will provide for the registration of the Q- REMIC Interests and the registration of transfers of the Q-REMIC Interests. The Trustee hereby initially appoints the Q-REMIC Interest Registrar for the purpose of registration of the Q-REMIC Interests and transfers thereof. Upon any resignation of any Q-REMIC Interest Registrar, the Trustee will promptly appoint a successor or, in the absence of such appointment, assume the duties of Q-REMIC Interest Registrar. (b) [Reserved.] (c) Any purported transfer of record or beneficial ownership, direct or indirect (whether pursuant to a purchase, a default under a secured lending agreement or otherwise), to a Disqualified Organization of any Q-R Interest, or any beneficial interest therein, will be void and of no effect. In no event will the Q-REMIC Interest Registrar register the transfer of any Q-R Interest unless the Q-REMIC Interest Registrar has received a properly executed United States Internal Revenue Service Form W-9 (or a Form W-8ECI, in the case of a proposed transferee (other than a U.S. Person) subject to United States income taxation on a net basis on income derived from such Q-R Interest) together with an affidavit from the proposed transferee in the form attached hereto as Exhibit C. The foregoing restrictions that are applicable to the prevention of a 14

19 transfer of a Q-R Interest to a Disqualified Organization will cease to have any further effect in the event that the Trustee determines, upon the advice of its tax counsel, that such restrictions are not necessary to preclude the imposition of a tax on the related Trust Fund or upon the transferor of a Q-R Interest, or to maintain the qualification of each Trust (or portion thereof) as a REMIC and, as a result of such determination, this Trust Agreement is amended to declare such restrictions to be of no further effect. (d) Under the Regulations, any purported transfer to a U.S. Person of record or beneficial ownership, direct or indirect (whether pursuant to a purchase, a default under a secured lending agreement or otherwise), of a Q-REMIC Interest that is a noneconomic residual interest within the meaning of the Regulations for the purpose of avoiding or impeding the assessment or collection of tax will be disregarded for all U.S. federal tax purposes. The affidavit required to be supplied by each transferee of a Q-R Interest pursuant to Section 6.02(c) (in the form attached hereto as Exhibit C) also will contain a statement that no purpose of the transfer of the Q-R Interest is to avoid or impede the assessment or collection of tax, that the proposed transferee understands that it may incur tax liabilities in excess of any cash flows generated by such Q-R Interest, that it intends to pay taxes associated with holding such Q-R Interest as they become due, and that it will not cause income from such Q-R Interest, if any, to be attributable to a foreign permanent establishment or fixed base of the proposed transferee or another U.S. taxpayer. (e) Any purported transfer of record or beneficial ownership, direct or indirect (whether pursuant to a purchase, a default under a secured lending agreement or otherwise), of a Q-R Interest, or any beneficial interest therein, (i) to a Person that is not (x) a U.S. Person or (y) a Person (other than a U.S. Person) subject to United States income taxation on a net basis on income derived from such Q-R Interest or (ii) to a partnership of which any Person or entity that holds an interest (directly, or indirectly through a pass-thru entity) is not (x) a U.S. Person or (y) a Person (other than a U.S. Person) subject to United States income taxation on a net basis on income derived from such Q-R Interest will be void and of no effect. The foregoing restriction will cease to have any effect with respect to a transfer of a Q-R Interest only if the Trustee has consented to such transfer expressly in writing. (f) [Reserved.] (g) A service charge in an amount determined by the Trustee will be made for any registration of transfer of a Q-REMIC Interest, and the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any registration of transfer of a Q-REMIC Interest. Section [Reserved.] 15

20 Section Persons Deemed Owners of Q-REMIC Interest. Fannie Mae, the Trustee, the Q-REMIC Interest Registrar and any agent of Fannie Mae, the Trustee or the Q-REMIC Interest Registrar may treat the Person in whose name a Q-REMIC Interest is registered as the owner of the Q-REMIC Interest for the purpose of receiving distributions, if any, pursuant hereto and for all other purposes whatsoever, and none of Fannie Mae, the Trustee, the Q-REMIC Interest Registrar or any agent of Fannie Mae, the Trustee or the Q-REMIC Interest Registrar will be affected by notice to the contrary. Section Maintenance of Office or Agency for the Q-REMIC Interests. The Trustee will maintain at its expense an office or agency for registration of transfer and where notices and demands to or upon the Trustee in respect of the Q-REMIC Interests and the Q-Trust Documents may be served. The Trustee initially designates the address set forth in Section 13.04(b) as its office for said purposes. The Trustee will give prompt written notice to the Q-REMIC Interest Holders of any change in the location of any such office or agency. Section [Reserved.] Section General Limitation. ARTICLE VII LIMITATION OF LIABILITY The liability of Fannie Mae and Trustee and any successor extends only to its performance in good faith of the duties and responsibilities specifically imposed by the terms of the Q-Trust Documents. No other duties or responsibilities will be implied. Section Measure of Liability. (a) Good Faith. Neither Fannie Mae nor the Trustee or any successor to any of them, or any of their respective directors, officers, employees or agents, will be liable for any action taken, or for refraining from taking any action, in good faith pursuant to the terms of the Q-Trust Documents, or for errors in judgment; provided, however, that this provision will not protect Fannie Mae or Trustee or any such other Person against any liability for action or inaction resulting from willful misfeasance, bad faith, gross negligence, or willful disregard of its obligations and duties under the Q-Trust Documents. (b) Standard of Care. In performing its duties and exercising its rights, Fannie Mae, acting in any capacity other than as Trustee, is obligated to act in good faith. The Trustee s standard of care is as described in Section Section Acts of Parties. In exercising any right under the Q-Trust Documents, Fannie Mae, acting in any capacity other than as Trustee, will not be acting in a fiduciary capacity. Any failure by Fannie Mae or 16

21 Trustee to exercise any right under the Q-Trust Documents in any instance will not be deemed a waiver of such right in any other instance. Section Merger or Consolidation. ARTICLE VIII FANNIE MAE Any corporation or other entity into which Fannie Mae is merged, converted or consolidated, or any corporation or other entity resulting from any merger, conversion or consolidation to which Fannie Mae is a party, or any corporation or other entity succeeding to the business of Fannie Mae, will succeed to and assume all obligations and duties imposed upon Fannie Mae by the terms of the Q-Trust Documents, without the filing of any instrument or the performance of any further act by Fannie Mae or any Q-REMIC Interest Holder. Fannie Mae will give notice promptly of such succession to all Q-REMIC Interest Holders. Section [Reserved.] Section Duties of Trustee. ARTICLE IX TRUSTEE The duties and obligations of the Trustee will be determined solely by the express provisions of the Q-Trust Documents. The Trustee will be responsible only for the performance of the duties and obligations specifically set forth in the Q-Trust Documents. No implied covenants or obligations of the Trustee will be read into the Q-Trust Documents. Any permissive right of the Trustee contained in the Q-Trust Documents will not be construed as a duty. Section Liability. No provision of the Q-Trust Documents will be construed to relieve the Trustee from liability for its own negligent action, its own negligent failure to act or its own misconduct; provided, however, that: (a) The Trustee will not be personally liable for an error of judgment made in good faith by any authorized officer of the Trustee, unless it is proven that the Trustee was negligent in ascertaining the pertinent facts; (b) The Trustee will not be personally liable with respect to any action taken, permitted or omitted to be taken by it in good faith with respect to a Trust in accordance with the direction of the related Q-REMIC Interest Holders as to the time, method and place of conducting any proceeding for any remedy available to the Trustee, or exercising any trust or power conferred upon the Trustee, under the Q-Trust Documents; 17

22 (c) For purposes of this Article IX, references to the Trustee include its directors, officers, employees and agents. Section Certain Matters Affecting the Trustee. (a) Reliance; Limitation of Duties. (i) The Trustee is entitled to rely on any direction rendered to it by Fannie Mae in exercising its rights pursuant to the terms of the Q-Trust Documents without inquiry as to the propriety or validity of the direction, and will be protected in acting on such direction; (ii) The Trustee, upon receipt of all resolutions, certificates, statements, opinions, reports, documents, orders or other instruments furnished to the Trustee that are specifically required to be furnished pursuant to any provision of the Q-Trust Documents, will examine them to determine whether they appear to conform prima facie to the requirements of the Q-Trust Documents. If any such instrument is found not to conform prima facie to the requirements of the Q-Trust Documents in any material respect, the Trustee will take whatever action it deems appropriate to have the instrument corrected in all material respects to the Trustee s satisfaction. Unless the Trustee has actual knowledge to the contrary, the Trustee will be entitled to rely, without further inquiry, on the apparent authority of the signer of any document, and upon the representation of the Person submitting documents to it (including Fannie Mae and any attorney, accounting professional or other adviser (including an attorney, accounting professional or other adviser employed by Fannie Mae or the Trustee)) that the document is genuine, which representation will be deemed given by the process of submitting the documents to the Trustee in the ordinary course of business. If the Trustee is acting in good faith, the Trustee may conclusively rely as to the truth of the statements and the correctness of the opinions or advice expressed in any certificates or opinions that are furnished to the Trustee and that conform to the requirements of the Q-Trust Documents. The Trustee may request and, if acting in good faith, rely upon, and will be protected in acting or refraining from acting upon, any resolution, officers certificate, certificate of auditors or any other certificate, statement, instrument, opinion, report, notice, request, consent, order, appraisal, bond or other paper or document prima facie in proper form and believed by it to be genuine and to have been signed or presented by the proper party; (iii) The Trustee may consult with attorneys, accounting professionals and other advisers (including attorneys, accounting professionals and advisers employed or retained by Fannie Mae or the Trustee) with respect to any action taken or allowed to occur or omitted by it under the Q-Trust Documents in good faith. If the Trustee is acting in good faith, any advice received from attorneys, accounting professionals or other advisers (including from attorneys, accounting professionals or other advisers employed or retained by Fannie Mae or the Trustee) will be full and complete authorization and protection from liability as to any act or omission in accordance with such advice; (iv) The Trustee will not be obligated to exercise any of the trusts or powers vested in it by the Q-Trust Documents or to institute, conduct or defend any 18