On April 26, 2019, the U.S. Court of Appeals for the D.C. Circuit (D.C. Circuit) issued its order on petition for review of the U.S. Environmental Protection Agency’s (EPA) final rule on the Toxic Substances Control Act (TSCA) Inventory Notification (Active-Inactive) Requirements (82 Fed. Reg. 37520 (Aug. 11, 2017)), which denied the petition for review on all but one claim. Petitioner Environmental Defense Fund (EDF) challenged five distinct features of the Inventory final rule: ...