Final Distribution Date The Final Distribution Date for each Class, which is set forth on the front cover of this Supplement, is the latest date on which the related Class Principal Balance or Class Notional Balance will be reduced to zero. •   The actual retirement of any Class may occur earlier than its Final Distribution Date. •   According to the terms of the Ginnie Mae Guaranty, Ginnie Mae will guarantee payment in full of the Class Principal Balance of each Class of Securities no later than its Final Distribution Date. Modeling Assumptions Unless otherwise indicated, the tables that follow are based on the following assumptions (the "Modeling Assumptions"), among others: 1.  The Mortgage Loans underlying the Group 1 Trust Assets have the characteristics shown under "Characteristics of the Ginnie Mae Multifamily Certificates and the Related Mortgage Loans" in Exhibit A to this Supplement, and the Group 2 Underlying Certificate Trust Assets have the characteristics shown under the Updated Exhibits A in Exhibit D of this Supplement. 2.  There are no voluntary prepayments during any lockout period. 3.  There are no prepayments on any Trust CLC. 4.  With respect to each Trust PLC, the Mortgage Loans prepay at 100% PLD (as defined under "– Prepayment Assumptions" in this Supplement) and, beginning on the applicable Lockout End Date (or if no lockout period applies, the applicable Issue Date), at the constant percentages of CPR (described below) shown in the related table. 5.  For the Group 1 Mortgage Loans, the Issue Date, Lockout End Date and Prepayment Penalty  End  Date  of  each  Ginnie  Mae  Multifamily  Certificate  is  the  first  day  of  the  month indicated on Exhibit A. 6.  For the Group 2 Mortgage Loans, the Issue Date, Lockout End Date and Prepayment Penalty  End  Date  of  each  Ginnie  Mae  Multifamily  Certificate  indicated  on  the  applicable Updated  Exhibit  A  in  Exhibit  D  represent  the  same  day  of  the  month  as  in  the  related Underlying Disclosure Document. 7.  Distributions  on  the  Securities,  including  all  distributions  of  prepayments  on  the Mortgage Loans, are always received on the 16th day of the month, whether or not a Business Day, commencing in July 2007. 8.  One hundred percent (100%) of any Prepayment Penalties received by the Trustee on the Group 1 Trust Assets are distributed to Class IO and one hundred percent (100%) of any Prepayment Penalties received by the Trustee on the Group 2 Trust Assets are distributed to Class MA. 9.  A termination of the Trust or the Underlying Trusts does not occur. 10.  The Closing Date for the Securities is June 28, 2007. 11.  No expenses or fees are paid by the Trust other than the Trustee Fee. 12.  Each Trust CLC converts to a Trust PLC on the date on which amortization payments are scheduled to begin on the related Mortgage Loan. S-25