Data / Federal rules / 2026-11069

Federal Motor Vehicle Safety Standards No. 303; Fuel System Integrity of Compressed Natural Gas Vehicles

The National Highway Traffic Safety Administration published this final rule in the Federal Register on June 3, 2026. It took effect on July 6, 2026.

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What the agency says

On May 30, 2025, NHTSA published a notice of proposed rulemaking (NPRM) proposing to remove obsolete text in Federal Motor Vehicle Safety Standard (FMVSS) No. 303, "Fuel system integrity of compressed natural gas vehicles". The agency received no comment on the proposed changes to FMVSS No. 303, and therefore the agency is adopting the changes in this final rule.

Key facts

Document number: 2026-11069
Type: Final rule
Action: Final rule
Agency: Transportation Department; National Highway Traffic Safety Administration
Published: June 3, 2026
Takes effect: July 6, 2026
Dates: Effective date: July 6, 2026.
Docket: Docket No. NHTSA-2025-0043
Regulation ID (RIN): 2127-AM94
Code of Federal Regulations: 49 CFR 571
Topics: Motor vehicle safety; Motor vehicles
Pages: 5

The document on federalregister.gov PDF

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Everything from the National Highway Traffic Safety Administration · Rules on motor vehicle safety · Rules on motor vehicles · Published in June 2026

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.