On April 9, 2025, President Trump issued an executive order (EO)¹ directing several federal agencies and subagencies that regulate energy, environmental, and conservation matters,² including the Federal Energy Regulatory Commission (FERC) and the Department of Energy (DOE), to establish conditional sunset dates for “regulations governing energy production.” The stated objective of the EO is to require agencies to periodically reexamine their regulations to ensure that they continue to serve the public good. For FERC, the order covers regulations promulgated under the Federal Power Act (FPA), the Natural Gas Act (NGA) and the Powerplant and Industrial Fuel Use Act (FUA)³, as amended, while DOE must consider regulations promulgated under the Atomic Energy Act (AEA), the National Appliance Energy Conservation Act, the Energy Policy Act of 1992 (EPAct 1992), the Energy Policy Act of 2005 (EPAct 2005) and the Energy Independence and Security Act of 2007 (EISA), as amended (collectively the Covered Regulations).⁴ To the extent the DOE has been directed to promulgate regulations under various sections of the NGA, FPA and FUA, and FERC has been directed to promulgate regulations specific to the statutes attributed to the DOE in the EO, the EO is silent. The EO expressly does not apply to those “regulatory permitting regimes authorized by statute.”⁵