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DOT/PHMSA RIN: 2137-AF54 Publication ID: Fall 2023 
Title: Hazardous Materials: Improving the Safety of Transporting Liquefied Natural Gas 

This rulemaking would amend the Hazardous Materials Regulations governing transportation of liquefied natural gas (LNG) in rail tank cars. This rulemaking action would incorporate the results of ongoing research efforts and collaboration with other Department of Transportation Operating Administrations and external technical experts; respond to a mandate in Executive Order 13990 for PHMSA to review recent actions that could be obstacles to Administration policies promoting public health and safety, the environment, climate change mitigation; and provide an opportunity for stakeholders to contribute their perspectives on rail transportation of LNG.

Agency: Department of Transportation(DOT)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 49 CFR 172    49 CFR 173    49 CFR 174    49 CFR 179    49 CFR 180   
Legal Authority: 49 U.S.C. 5101 et seq.   
Legal Deadline:  None
Action Date FR Cite
NPRM  06/00/2024 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Undetermined 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL:   Public Comment URL:  
RIN Data Printed in the FR: No 
Related RINs: Related to 2137-AF55 
Agency Contact:
Ryan Larson
Transportation Specialist
Department of Transportation
Pipeline and Hazardous Materials Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590
Phone:202 366-8553