The terms used in this subpart are defined in the CAA; 40 CFR 60.371; 40 CFR 60.2 for terms used in the applicable provisions of 40 CFR part 60, subpart A; and Sec. 63.2 for terms used in the applicable provisions of 40 CFR part 63, subpart A. [72 FR 38913, July 16, 2007, as amended at 73 FR 15929, Mar. 26, 2008]