In June 2012, Sierra Club, Clean Energy Future Oklahoma, and the East Texas Sub Regional Planning Commission filed a joint complaint in the United States District Court for the Western District of Oklahoma seeking injunctive relief and petitioning for a review of the U.S. Army Corps of Engineers' action in issuing Nationwide Permit 12 permits for the Cushing, Oklahoma, to the Gulf Coast portion of the pipeline. The suit alleges that, contrary to the federal Administrative Procedure Act, 5 U.S.C. § 701 et. seq., the Corps' issuance of the permits was arbitrary and capricious and an abuse of discretion.