On July 15, 2019, NRECA filed a petition for review of the Federal Energy Regulatory Commission's orders promulgating a final rule on Electric Storage Participation In Markets Operated By Regional Transmission Organizations and Independent System Operators, Order No. 841, Docket Nos. RM16-23-001 and AD16-20-001, 162 FERC ¶ 61,127 (Feb. 15, 2018), rehearing denied, Order No. 841-A, 167 FERC ¶ 61,154 (May 16, 2019). The petition was jointly filed with the American Public Power Association, the Edison Electric Institute, and American Municipal Power, Inc., in the U.S. Court of Appeals for the District of Columbia Circuit and is captioned APPA v. FERC, No. 19-1147. ​