Each utility shall comply with the pressure survey, recording, and other requirements imposed by the U.S.D.O.T., Regulations for Transportation of Natural and other Gas by Pipeline - Title 49 C.F.R. §§192.195, 192.197, 192.199, 192.739, 192.741, and 192.743. Each utility shall regularly record the pressures in various parts of its distribution system. The charts or records thus obtained shall bear the date and place where the pressure was taken and shall be retained for a period of at least two (2) years.
Okla. Admin. Code § 165:45-7-4