D.C. Circuit Vacates PHMSA's LNG-By-Rail Rule

On 17 January 2025, the D.C. Circuit Court of Appeals vacated a 2020 Pipeline and Hazardous Materials Safety Administration (PHMSA) rule—the "Hazardous Materials: Liquefied Natural Gas by Rail Rule" (the LNG-by-Rail Rule)—that allowed for the transportation of liquefied natural gas (LNG) on rail cars.¹ The LNG-by-Rail Rule was challenged by a collection of environmental organizations, state governments, and tribal governments for failing to adequately consider the environmental impact of allowing LNG transport by rail. The decision to limit the domestic transportation of LNG conflicts with President Trump's "American Energy Dominance" agenda and the stated intentions of the nominee for secretary of energy to expand US LNG infrastructure.² In light of the D.C. Circuit vacating a PHMSA natural gas pipeline safety rule in August 2024 and the published-but-paused 17 January 2025 PHMSA final rule on pipeline methane emission detection requirements, this decision adds yet