Okla. Stat. tit. 47, § 230.5

Motor carriers and other persons subject to the Oklahoma Motor Carrier Safety and Hazardous Materials Transportation Act shall make available for inspection and copying their accounts, books, records, memoranda, correspondence, and other documents, and shall allow their lands, buildings and equipment to be examined and inspected by any officer, employee, or agent of the Department of Public Safety, including members of the Oklahoma Highway Patrol, upon demand and display of the credentials issued by the Commissioner.