Data / Federal rules / 2025-02582

Federal Motor Vehicle Safety Standards; FMVSS No. 305a Electric-Powered Vehicles: Electric Powertrain Integrity Global Technical Regulation No. 20; Incorporation by Reference

The National Highway Traffic Safety Administration published this final rule in the Federal Register on February 14, 2025. It took effect on March 20, 2025.

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What the agency says

This document delays until March 20, 2025, the effective date of the December 20, 2024, final rule that adopted Federal Motor Vehicle Safety Standard (FMVSS) No. 305a to replace FMVSS No. 305, "Electric- powered vehicles: Electrolyte spillage and electrical shock protection." FMVSS No. 305a applies to light and heavy vehicles and includes performance requirements for the propulsion battery. The final rule also established a part entitled, "Documentation for Electric- powered Vehicles," that requires manufacturers to compile risk mitigation documentation and submit standardized emergency response information to assist first and second responders handling electric vehicles.

Key facts

Document number: 2025-02582
Type: Final rule
Action: Final rule; delay of effective date
Agency: Transportation Department; National Highway Traffic Safety Administration
Published: February 14, 2025
Takes effect: March 20, 2025
Dates: The effective date of the rule published on December 20, 2024, at 89 FR 104318, is delayed until March 20, 2025. The incorporation by reference approval of certain publications listed in the rule by the Director of the Federal Register is delayed until March 20, 2025.
Docket: Docket No. NHTSA-2024-0091
Regulation ID (RIN): 2127-AM43
Code of Federal Regulations: 49 CFR 561; 49 CFR 571
Pages: 2

The document on federalregister.gov PDF

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Everything from the National Highway Traffic Safety Administration · Published in February 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.