Versions of 16 CFR Part 306 - Automotive Fuel Ratings, Certification and Posting on LawServer 2024 16 CFR Part 306 – Automotive Fuel Ratings, Certification and Posting 2023 16 CFR PART 306 – AUTOMOTIVE FUEL RATINGS, CERTIFICATION AND POSTING 2022 16 CFR Part 306 – Automotive Fuel Ratings, Certification and Posting 2021 16 CFR Part 306 – Automotive Fuel Ratings, Certification and Posting