23-1229 - Environmental Protection Agency v. Calumet Shreveport Refining, LLC - Opinion Announcement - June 18, 2025

A case in which the Court held that challenges by small oil refineries seeking exemptions from the requirements of the Clean Air Act’s Renewable Fuel Standard program should be heard exclusively in the U.S. Court of Appeals for the D.C. Circuit when the agency’s denial actions are “nationally applicable” or “based on a determination of nationwide scope or effect.”