This subpart implements provisions of the Forest Resources Conservation and Shortage Relief Act of 1990 (16 U.S.C. 620, et seq.) that became effective upon enactment or as otherwise specified in the Act. As of September 8, 1995, this subpart applies to unprocessed timber originating from private lands west of the 100th meridian in the contiguous 48 States that requires domestic processing. Except as provided later in this paragraph, this subpart applies to all unprocessed timber originating from National Forest System lands west of the 100th meridian in the contiguous 48 States acquired from timber sale contracts awarded on or after August 20, 1990. The rules regarding substitution at § 223.162 of subpart D apply to unprocessed timber acquired from timber sale contracts awarded between August 20, 1990, and September 8, 1995, as provided in § 490(a)(2)(A) of the Act. The rules regarding reporting the acquisition and disposition of unprocessed Federal timber at § 223.193 of this subpart apply to all transfers of unprocessed Federal timber originating from National Forest System lands west of the 100th meridian in the contiguous 48 States regardless of timber sale contract award date.