( August 4, 2026, 1:39 PM EDT) -- SAN FRANCISCO — A May U.S. Supreme Court opinion in Flowers Foods, Inc. v. Brock, on the Federal Arbitration Act’s (FAA) exemption for workers who transport goods on an intrastate leg of an interstate journey doesn’t impact the Pipeline Safety Act’s (PSA) definition of “interstate commerce” and the application of Southern Pacific Pipe Lines v. U.S. Department of Transportation, in which the District of Columbia Circuit U.S. Court of Appeals discussed regulation and classification of interstate and intrastate pipelines, California argues in the latest supplemental brief filed in the Ninth Circuit U.S. Court of Appeals after oral argument was heard in a consolidated case over the federal Pipeline and Hazardous Materials Safety Administration’s (PHMSA) authority to restart pipelines running through California....