CFR›Title 40›Chapter I›Part 1066›40 CFR Part 1066 Subpart F Citation40 CFR Part 1066 Subpart FContainsSection 1066.501CorpusDaily eCFRDisplayed edition2026-06-29Last updated2026-06-29 Subpart F—Electric Vehicles and Hybrid Electric Vehicles Sections 1066.501 § 1066.501 Overview. Authority42 U.S.C. 7401-7671q.Source79 FR 23823, Apr. 28, 2014, unless otherwise noted. Previous E Subpart E—Preparing Vehicles and Running an Exhaust Emission Test Next G Subpart G—Calculations