U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 49Chapter VPart 525 - PART 525—EXEMPTIONS FROM AVERAGE FUEL ECONOMY STANDARDS
§ 525.1 - Scope.
§ 525.2 - Purpose.
§ 525.3 - Applicability.
§ 525.4 - Definitions.
§ 525.5 - Limitation on eligibility.
§ 525.6 - Requirements for petition.
§ 525.7 - Basis for petition.
§ 525.8 - Processing of petitions.
§ 525.9 - Duration of exemption.
§ 525.10 - Renewal of exemption.
§ 525.11 -
§ 525.12 - Public inspection of information.
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