Base Offering Circular - Multifamily 482090 63 original Class Notional Balances (if any), Interest Rates (if any) and other specific characteristics of each Class of Securities. Class Factor................................ With respect to each Class, a number truncated to eight decimal places calculated by the Trustee and published or otherwise made available to investors on or about one Business Day preceding each Distribution Date that, when multiplied by the Original Class Principal Balance (or original Class Notional Balance) of that Class, determines the Class Principal Balance (or Class Notional Balance) after giving effect to any distribution of principal to be made on the Securities (and any addition to the Class Principal Balance of any Accrual Class) on that Distribution Date. Class Notional Balance .............. The balance used as a reference to calculate the amount of interest due on a Notional Class. Class Principal Balance.............. As to any Class as of any Distribution Date, the Original Class Principal Balance of that Class less all principal previously allocated to that Class (plus amounts, if any, added to the Class Principal Balance) on previous Distribution Dates, except as otherwise provided in the related Offering Circular and Trust Agreement. Class R Security ......................... A Security that represents a Residual Interest in a Trust REMIC. Class RI Security........................ A Security that represents a Residual Interest in an Issuing REMIC. Class RP Security....................... A Security that represents a Residual Interest in a Pooling REMIC. Class RR Security ...................... A Security that represents (i) a Residual Interest in one or more Pooling REMICs and/or an Issuing REMIC or (ii) a Residual Interest in two or more Trust REMICs. Class Type.................................. An Interest Type, Principal Type or Other Type. Closing Date............................... For each Series, the date upon which the Sponsor, pursuant to the Trust Agreement, deposits the Trust Assets in the Trust in exchange for the Securities and settles and pays for the Securities. Closing Documents .................... With respect to each Series, those documents, specified in the related Sponsor Agreement, that are to be executed by