CFR›Title 16›Chapter I›Part 309›Subpart C ContainsSections 309.20–309.21CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart C—Requirements for Alternative Fueled Vehicles Sections 309.20 § 309.20 Labeling requirements for new covered vehicles. 309.21 § 309.21 Recordkeeping. Previous B Subpart B—Requirements for Alternative Fuels