US lawFederal (United States)RegulationsTitle 49 CFR — TransportationChapter V — NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 525 — EXEMPTIONS FROM AVERAGE FUEL ECONOMY STANDARDS525.349 C.F.R. § 525.3Applicability.Last amended: 2016Year: 2026Length: 7 wordsOfficial source Cite as 49 C.F.R. § 525.3 (2026)This part applies to passenger automobile manufacturers.Previous49 C.F.R. § 525.2Next49 C.F.R. § 525.4