Data / Federal rules / 2024-28707

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 December 20, 2024. It took effect on February 18, 2025.

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What the agency says

Consistent with a Global Technical Regulation on electric vehicle safety, NHTSA is establishing Federal Motor Vehicle Safety Standard (FMVSS) No. 305a to replace FMVSS No. 305, "Electric-powered vehicles: Electrolyte spillage and electrical shock protection." Among other improvements, FMVSS No. 305a applies to light and heavy vehicles and includes performance requirements for the propulsion battery. NHTSA is also establishing a new regulation, part 561, "Documentation for Electric-powered Vehicles," that requires manufacturers to compile risk mitigation documentation and to submit standardized emergency response information to assist first and second responders handling electric vehicles.

Key facts

Document number: 2024-28707
Type: Final rule
Action: Final rule
Agency: Transportation Department; National Highway Traffic Safety Administration
Published: December 20, 2024
Takes effect: February 18, 2025
Dates: Effective date: This final rule is effective February 18, 2025.
Docket: Docket No. NHTSA-2024-0091
Regulation ID (RIN): 2127-AM43
Code of Federal Regulations: 49 CFR 561; 49 CFR 571
Topics: Imports; Incorporation by reference; Motor vehicle safety; Motor vehicles
Pages: 48

The document on federalregister.gov PDF

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Everything from the National Highway Traffic Safety Administration · Rules on imports · Rules on incorporation by reference · Rules on motor vehicle safety · Published in December 2024

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.