ONEOK Partners Subsidiaries Seeking Ruling on Regulatory Agency Jurisdiction

ONEOK Partners, L.P. (NYSE: OKS ) today announced that three of its subsidiaries have filed a declaratory judgment action in federal District Court in Tulsa, Okla., seeking a ruling on the jurisdictional limits of the Pipeline and Hazardous Materials Safety Administration (PHMSA). The action asks the court to rule on the extent of PHMSA's