S.C. Code Regs. § § 38-427
Auditors, accountants, officers, examiners, and other agents of the Department shall, upon display of proper credentials after demand, be permitted by any motor carrier as defined in S.C. Code Ann. Section 58-23-1110 to examine and copy the books, records, accounts, bills of lading, load sheets, manifests, correspondence, and other records of such motor carrier relating to the transportation of property or passengers and to examine the vehicles, loads thereon, terminals, buildings, and other equipment and facilities used by such motor carrier in such transportation business; and all such motor carriers shall instruct their drivers, agents, and employees in charge of such records, equipment and facilities to cooperate in the event of such examination as necessary to insure compliance with R.38-424.
S.C. Code Regs. § 38-427