CFR›Title 49›Subtitle B›Chapter V›Part 533 ContainsSections 533.1–533.6; Appendix ACorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 533—LIGHT TRUCK FUEL ECONOMY STANDARDS Contents 533.1 § 533.1 Scope. 533.2 § 533.2 Purpose. 533.3 § 533.3 Applicability. 533.4 § 533.4 Definitions. 533.5 § 533.5 Requirements. 533.6 § 533.6 Measurement and calculation procedures. Appendix A to Part 533 Appendix A to Part 533—Example of Calculating Compliance Under § 533.5(i) Authority49 U.S.C. 32902; delegation of authority at 49 CFR 1.95.Source87 FR 26076, May 2, 2022, unless otherwise noted. Previous 531 Part 531—Passenger Automobile Average Fuel Economy Standards Next 534 Part 534—Rights and Responsibilities of Manufacturers in the Context of Changes in Corporate Relationships