S.C. Code § 58-9-340
The Office of Regulatory Staff may, in its discretion, and subject to approval of the commission, prescribe systems of accounts to be kept by telephone utilities subject to the commission's jurisdiction and the Office of Regulatory Staff may prescribe the manner in which the accounts shall be kept and may require every telephone utility to keep its books, papers, and records accurately and faithfully according to the system of accounts as prescribed by the Office of Regulatory Staff. But nothing in this section shall be construed to be in conflict with or in violation of the provisions of the Communications Act of Congress of 1934, as amended (U. S. C. A. Title 47, Sections 151 through 609), nor shall anything herein be construed to be in conflict with any lawful order of the Federal Communications Commission issued pursuant to the authority vested in it by said act of Congress.
S.C. Code § 58-9-340