Data / Federal rules / 2025-10586
Resetting the Corporate Average Fuel Economy Program
The National Highway Traffic Safety Administration published this final rule in the Federal Register on June 11, 2025.
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What the agency says
The National Highway Traffic Safety Administration is issuing this interpretive rule to set forth the agency's interpretation of the factors the agency is prohibited by law from considering when setting maximum feasible fuel economy standards under the Energy Policy and Conservation Act of 1975, the Energy Independence and Security Act of 2007, and other applicable law. This rule describes NHTSA's interpretation of its authority to establish the necessary legal foundation for bringing the Corporate Average Fuel Economy (CAFE) program into compliance with relevant statutory requirements. The rule also describes NHTSA's interpretation of its authority for a commercial medium- and heavy-duty (MDHD) on-highway vehicle and work truck fuel efficiency improvement program, also establishing the necessary legal foundation for bringing that program into compliance with the law. Pending the rulemaking process for the establishment of replacement standards, NHTSA will exercise its enforcement authority with regard to all existing CAFE and MDHD standards in accordance with the interpretation set forth in this rule.
Key facts
- Document number
- 2025-10586
- Type
- Final rule
- Action
- Interpretive rule
- Agency
- Transportation Department; National Highway Traffic Safety Administration
- Published
- June 11, 2025
- Dates
- This interpretive rule is applicable as of June 11, 2025.
- Docket
- Docket No. NHTSA-2025-0055
- Code of Federal Regulations
- 49 CFR 531; 49 CFR 533; 49 CFR 535
- Pages
- 10
Other documents from the National Highway Traffic Safety Administration
Everything from the National Highway Traffic Safety Administration · Published in June 2025
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.