Allocation  of  Principal:  On  each  Distribution  Date  for  a  Security  Group,  the  following distributions will be made to the related Securities: SECURITY GROUP 1 The Group 1 Principal Distribution Amount and the ZA and ZB Accrual Amounts will be allocated as follows: •   The ZA Accrual Amount in the following order of priority: 1.  Concurrently, to F and S, pro rata, until reduced to their Aggregate Scheduled Principal Balance for that Distribution Date 2.  To ZA, until retired •   The Group 1 Principal Distribution Amount and ZB Accrual Amount in the following order of priority: 1.  To the PAC Classes, until reduced to their Aggregate Scheduled Principal Balance for that Distribution Date, in the following order of priority: a.  Concurrently, to PA and PC, pro rata, until retired b.  Concurrently, to FD, PB and SD, pro rata, until retired 2.  Concurrently, to F and S, pro rata, until reduced to their Aggregate Scheduled Principal Balance for that Distribution Date 3.  To ZA, until retired 4.  Concurrently, to F and S, pro rata, without regard to their Aggregate Scheduled Principal Balances, until retired 5.  To the PAC Classes, in the same manner and order of priority described in Step 1 above, but without regard to their Aggregate Scheduled Principal Balances, until retired 6.  To ZB, until retired SECURITY GROUP 2 A percentage of the Group 2 Principal Distribution Amount will be applied to the Trustee Fee, and the remainder of the Group 2 Principal Distribution Amount (the "Group 2 Adjusted Principal Amount") will be allocated in the following order of priority: 1.  To the PAC Classes, until reduced to their Aggregate Scheduled Principal Balance for that Distribution Date, in the following order of priority: a.  Concurrently, to FA and OA, pro rata, until retired b.  Concurrently, to FB and OB, pro rata, until retired c.  Concurrently, to FC and OC, pro rata, until retired d.  Concurrently, to FJ and OJ, pro rata, until retired 2.  Sequentially, to DA, DB and DC, in that order, until retired 3.  To the PAC Classes, in the same manner and order of priority described in Step 1 above, but without regard to their Aggregate Scheduled Principal Balances, until retired S-6