Class A Certificate Any Class A-1 Certificate, Class A-2 Certificate, Class A-3 Certificate, Class A-4 Certificate, Class A-5 Certificate, Class A-6 Certificate or Class A-7 Certificate.
Class X-B Certificate Any one of the Certificates executed and authenticated by the Certificate Administrator or the Authenticating Agent in substantially the form set forth in Exhibit A-7 hereto.
Class X-D Certificate Any one of the Certificates executed and authenticated by the Certificate Administrator or the Authenticating Agent in substantially the form set forth in Exhibit A-12 hereto.
Class X Certificates All Certificates bearing the class designation of "Class X".
Class A-1 Certificate Any one of the Certificates executed and authenticated by the Certificate Administrator or the Authenticating Agent in substantially the form set forth in Exhibit A-1 hereto.
Class C Certificate Any one of the Certificates with a “Class C” designation on the face thereof, substantially in the form of Exhibit A-1 attached hereto, and evidencing a portion of a class of “regular interests” in REMIC III for purposes of the REMIC Provisions.