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Transportation Department, National Highway Traffic Safety Administration

Resetting the Corporate Average Fuel Economy Program

Published June 11, 2025. printed at 90 FR 24518. amending 49 CFR 531, 49 CFR 533, 49 CFR 535.

In plain English

Carmakers must meet a fuel economy target. This sets out how the agency now reads that rule.

Read it at the Federal Register →

What the Rule Says It Does

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.

This is the rule's own summary, as the Federal Register prints it.

The Orders It Names

The rule names these orders itself. What it does about them is a reading, and none is recorded here.

How to cite this
  1. The rule itself

    Transportation Department, National Highway Traffic Safety Administration, “Resetting the Corporate Average Fuel Economy Program,” 90 FR 24518 (June 11, 2025).
    https://www.federalregister.gov/documents/2025/06/11/2025-10586/resetting-the-corporate-average-fuel-economy-program

  2. This page

    “Resetting the Corporate Average Fuel Economy Program,” a final rule naming an order indexed here. Read the Mandate, https://readthemandate.org/rules/rule-2025-10586/ (retrieved August 26, 2026).

Cite the document when the claim is about what the document says. Cite this page when the indexing, the wording or the record of what has happened is what is being relied on.

How This Rule Is Quoted

Federal Register documents are United States government works and are not under copyright. The summary is quoted as printed and the rule itself is one click away, because an index is not a mirror.