M4 Target Amount. With respect to any Distribution Date, an amount equal to the lesser of (a) the product of (i) 95.30% and (ii) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the related Collection Period and (b) the amount, if any, by which (i) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the related Collection Period exceeds (ii) 0.50% of the Cut-off Date Balance.

M4 Target Amount. With respect to any Distribution Date, an amount equal to the lesser of (a) the product of (i) 85.30% and (ii) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the Collection Period and (b) the amount, if any, by which (i) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the Collection Period exceeds (ii) 0.50% of the Cut-off Date Balance. Master Servicer: Aurora Loan Services Inc., or any successor in interest, or if any successor master servicer shall be appointed as herein provided, then such successor master servicer.

M4 Target Amount. With respect to any Distribution Date, an amount equal to the lesser of (a) the product of (i) 76.30% and (ii) the Aggregate Pool Balance for such Distribution Date and (b) the amount, if any, by which (i) the Aggregate Pool Balance for such Distribution Date exceeds (ii) 0.50% of the Cut-off Date Balance.

M4 Target Amount. With respect to any Distribution Date, an amount equal to the lesser of (a) the product of (i) 89.70% and (ii) the Aggregate Loan Balance for such Distribution Date and (b) the amount, if any, by which (i) the Aggregate Loan Balance for such Distribution Date exceeds (ii) 0.40% of the Cut-off Date Balance.

M3 Target Amount With respect to any Distribution Date, an amount equal to the lesser of (a) the product of (i) 93.80% and (ii) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the related Collection Period and (b) the amount, if any, by which (i) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the related Collection Period exceeds (ii) 0.50% of the Cut-off Date Balance.

M2 Target Amount With respect to any Distribution Date, an amount equal to the lesser of (a) the product of (i) 92.30% and (ii) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the related Collection Period and (b) the amount, if any, by which (i) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the related Collection Period exceeds (ii) 0.50% of the Cut-off Date Balance.

M5 Target Amount With respect to any Distribution Date an amount equal to the lesser of (a) the product of (i) 93.30% and (ii) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the related Collection Period and (b) the amount, if any, by which (1) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the related Collection Period exceeds (2) the Overcollateralization Floor.

M1 Target Amount With respect to any Distribution Date, an amount equal to the lesser of (a) the product of (i) 86.80% and (ii) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the related Collection Period and (b) the amount, if any, by which (i) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the related Collection Period exceeds (ii) 0.50 % of the Cut-off Date Balance.

M6 Target Amount With respect to any Distribution Date, an amount equal to the lesser of (a) the product of (i) 86.70% minus the Additional Required Enhancement Percentage and (ii) the Pool Balance for such Distribution Date determined as of the last day of the related Collection Period and (b) the amount, if any, by which (i) the Pool Balance for such Distribution Date determined as of the last day of the related Collection Period exceeds (ii) 0.50% of the Cut-off Date Balance.

Target Amount With respect to any Distribution Date, an amount equal to the Aggregate Pool Balance for such Distribution Date minus the Targeted Overcollateralization Amount for such Distribution Date.

Senior Target Amount With respect to each Distribution Date, an amount equal to the lesser of (a) the product of (i) 77.30% and (ii) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the related Collection Period and (b) the amount, if any, by which (i) the Aggregate Loan Balance for such Distribution Date determined as of the last day of the Collection Period exceeds (ii) 0.50% of the Cut-off Date Balance.

Overcollateralization Target Amount With respect to any Distribution Date (i) prior to the Stepdown Date, [_]% of the aggregate Stated Principal Balance of the Mortgage Loans as of the Cut-off Date, (ii) on or after the Stepdown Date provided a Trigger Event is not in effect, the greater of (x) [_]% of the aggregate Stated Principal Balance of the Mortgage Loans as of the last day of the related Due Period (after giving effect to scheduled payments of principal due during the related Due Period, to the extent received or advanced and unscheduled collections of principal received during the related Prepayment Period) and (y) $[_], or (iii) on or after the Stepdown Date and if a Trigger Event is in effect, the Overcollateralization Target Amount for the immediately preceding Distribution Date. Notwithstanding the foregoing, on and after any Distribution Date following the reduction of the aggregate Certificate Principal Balance of the Class A Certificates and the Mezzanine Certificates to zero, the Overcollateralization Target Amount shall be zero.

REMIC 2 Overcollateralization Target Amount 1.00% of the Overcollateralization Target Amount.

First Liquidation Target Amount has the meaning assigned to such term in Section 6.1(c)(i)(D).

Second Liquidation Target Amount has the meaning assigned to such term in Section 6.1(c)(i)(E).

Target Overcollateralization Amount means, with respect to any Payment Date, 3.00% of the Adjusted Pool Balance as of the Cutoff Date. Notwithstanding the foregoing, the Target Overcollateralization Amount shall not exceed the Adjusted Pool Balance on such Payment Date.

Initial Overcollateralization Amount means $[___________].

First Target Distribution means $0.4025 per Unit per Quarter (or, with respect to the period commencing on the Closing Date and ending on September 30, 2005, it means the product of $0.4025 multiplied by a fraction of which the numerator is the number of days in such period, and of which the denominator is 92), subject to adjustment in accordance with Section 6.6 and Section 6.9.

Class A-2 Component The Component having such designation.

Class A-1 Component The Component having such designation.

Targeted Overcollateralization Amount For any Distribution Date prior to the Stepdown Date, 1.50% of the Aggregate Collateral Balance as of the Initial Cut-off Date (including amounts in the Prefunding Account as of the Closing Date); with respect to any Distribution Date on or after the Stepdown Date and with respect to which a Trigger Event has not occurred, the greater of (a) 3.00% of the Aggregate Collateral Balance for such Distribution Date, or (b) 0.50% of the Aggregate Collateral Balance as of the Initial Cut-off Date (including amounts in the Prefunding Account as of the Closing Date); with respect to any Distribution Date on or after the Stepdown Date with respect to which a Trigger Event has occurred and is continuing, the Targeted Overcollateralization Amount for the Distribution Date immediately preceding such Distribution Date.

Aggregate Targeted Balance With respect to any group of Targeted Principal Classes or Components and any Distribution Date, the amount set forth for such group for such Distribution Date in Schedule V hereto.

Net Amount means the Distribution Amount less the sum of all quarterly payments received by the COP Swap Counterparties under the COP Swap Collateral Agreement in respect of amounts owed under the COP Swap Agreements since January 1, 2014.

Senior Accelerated Distribution Percentage With respect to any Distribution Date occurring on or prior to the 60th Distribution Date and, with respect to any Mortgage Pool comprised of two or more Loan Groups, any Loan Group, 100%. With respect to any Distribution Date thereafter and any such Loan Group, if applicable, as follows:

Excess Overcollateralization Amount With respect to any Distribution Date, the excess, if any, of (a) the Overcollateralization Amount on such Distribution Date over (b) the Required Overcollateralization Amount for such Distribution Date.

Group I Basic Principal Distribution Amount With respect to any Distribution Date, the excess of (i) the Group I Principal Remittance Amount for such Distribution Date over (ii)(a) the Overcollateralization Release Amount, if any, for such Distribution Date multiplied by (b) the Group I Allocation Percentage.

Group I Allocation Percentage With respect to any Distribution Date, the percentage equivalent of a fraction, the numerator of which is (i) the Group I Principal Remittance Amount for such Distribution Date, and the denominator of which is (ii) the Principal Remittance Amount for such Distribution Date.

Third Target Distribution means $0.5250 per Unit per Quarter (or, with respect to the period commencing on the Closing Date and ending on September 30, 2005, it means the product of $0.5250 multiplied by a fraction of which the numerator is equal to the number of days in such period and of which the denominator is 92), subject to adjustment in accordance with Section 6.6 and Section 6.9.

Required Overcollateralization Amount With respect to any Distribution Date (i) prior to the Stepdown Date, an amount equal to 0.75% of the aggregate Stated Principal Balance of the Mortgage Loans as of the Cut-off Date; (ii) on or after the Stepdown Date but prior to the Distribution Date in December 2012, provided a Trigger Event is not in effect, the greater of (x) 1.875% of the outstanding aggregate Stated Principal Balance of the Mortgage Loans after giving effect to distributions made on that Distribution Date and (y) the Overcollateralization Floor; (iii) on or after the Stepdown Date and on or after the Distribution Date in December 2012, provided a Trigger Event is not in effect, the greater of (x) 1.50% of the outstanding aggregate Stated Principal Balance of the Mortgage Loans after giving effect to distributions made on that Distribution Date and (y) the Overcollateralization Floor; and (iv) on or after the Stepdown Date if a Trigger Event is in effect, the Required Overcollateralization Amount for the immediately preceding Distribution Date; provided that the Required Overcollateralization Amount may be reduced so long as written confirmation is obtained from each rating agency that the reduction will not reduce the ratings assigned to the Class A Certificates and Class M Certificates by that rating agency (without regard to the Certificate Policy) below the lower of the then-current ratings or the ratings assigned to those certificates as of the closing date by that rating agency. Senior Certificate: Any one of the Class A Certificates.