2137-AF64 202504 Unified Agenda of Federal Regulatory and Deregulatory Actions 2137 Pipeline and Hazardous Materials Safety Administration PHMSA 2100 Department of Transportation DOT Hazardous Materials: Harmonization With International Standards

The Federal hazardous materials transportation law requires the Secretary of Transportation to ensure that, to the extent practicable, regulations governing the transportation of hazardous materials in commerce are consistent with standards adopted by international authorities (49 U.S.C. 5120(b)). This rulemaking would amend the HMR, where appropriate, to maintain alignment with international standards that became effective as of January 1, 2025, and consequently facilitate the safe global trade of hazardous materials. Proposals in this rulemaking action may include but are not limited to: new entries and provisions for battery-powered vehicles (sodium-ion, lithium metal, and lithium ion); new classification provisions for certain fire suppression devices; amendments to limited quantities for Division 2.2 gases; and updates of International Organization for Standardization cylinder manufacturing and testing standards incorporated by reference.

]]> Substantive, Nonsignificant Previously Published in The Unified Agenda Proposed Rule Stage No No Deregulatory 49 CFR 171 49 CFR 172 49 CFR 173 49 CFR 175 49 CFR 176 49 CFR 178 49 CFR 180 49 U.S.C. 5101 et seq. 49 U.S.C. 5120(b) No NPRM 12/00/2025 Hazardous Materials (HM-215R) No No None No No www.regulations.gov www.regulations.gov No No Candace Casey Transportation Regulations Specialist 2137 Pipeline and Hazardous Materials Safety Administration PHMSA 202-366-8553 candace.casey@dot.gov 1200 New Jersey Avenue, SE, Washington DC 20590