The Clean Water Act (CWA) provides that regulations shall be issued "which require an owner or operator of a tank vessel or facility ... to prepare and submit ... a plan for responding, to the maximum extent practicable, to a worst-case discharge, and to a substantial threat of such a discharge, of a hazardous substance." The Environmental Protection Agency EPA published a final rule in March 2024 to require planning for worst case discharges of CWA hazardous substances under section 311(j)(5)(A). Section 3 of the January 20, 2025 Executive Order 14154 Unleashing American Energy” requires an immediate review of agency actions to identify those that may impose an undue burden on the identification, development, or use of domestic energy resources. As EPA considers options, the agency is proposing to extend the compliance date and make administrative changes.