See subpart A of this part 565 regarding the applicability of this subpart. This part applies to passenger cars, multipurpose passenger vehicles, trucks, buses, trailers (including trailer kits), incomplete vehicles, and motorcycles. Vehicles imported into the United States under 49 CFR 591.5(f), other than by the corporation responsible for the assembly of that vehicle or a subsidiary of such a corporation, are excluded from requirements of § 565.23(b), §§ 565.23(c), 565.23(g), 565.23(h), 565.24 and 565.25.