Regulations last checked for updates: Feb 09, 2026

Title 49 - Transportation last revised: Feb 03, 2026
All TitlesTitle 49Chapter VPart 531 - PART 531—PASSENGER AUTOMOBILE AVERAGE FUEL ECONOMY STANDARDS
View all text of Part 531 [§ 531.1 - § 531.6]
§ 531.3 - Applicability.

This part applies to manufacturers of passenger automobiles.

authority: 49 U.S.C. 32902,delegation.95
source: 87 FR 26070, May 2, 2022, unless otherwise noted.
cite as: 49 CFR 531.3
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