S.C. Code Ann. § 57-25-200: Agreements with other authorities as to control of advertising in areas adjacent to interstate and primary highway systems.

(A) Within the requirements of this article the commission may enter into agreements with other governmental authorities relating to the control of outdoor advertising in areas adjacent to the interstate and primary highway systems, including the establishment of information centers and safety rest areas and take action in the name of the State to comply with the terms of the agreements.

(B) If an agreement is not achieved, the Attorney General of this State promptly shall initiate proceedings under the provisions of Section 131(1) of Title 23 of the United States Code with respect to hearings, stay of penalties, and judicial review in order to resolve the disagreement by judicial determination. He also shall initiate the proceedings if there is a determination to withhold funds from this State for its alleged failure to comply with any provision of Section 131 in order to obtain a judicial determination of whether this article provides effective control of outdoor advertising in conformity with the section and, if not, the extent of modifications necessary to bring it into compliance.