S.C. Code § 57-25-130
The General Assembly finds that outdoor advertising is a legitimate form of commercial use of the private property adjacent to the public highways. The General Assembly also finds that outdoor advertising is an integral part of the business and marketing function and is an established segment of the national economy which serves to promote and protect investments in commerce and industry and is, therefore, a business which must be allowed to exist and operate where other business and commercial activities are conducted and that a reasonable use of property for outdoor advertising to the traveling public is desirable. In order, however, to prevent unreasonable distraction of operators of motor vehicles, prevent confusion with regard to traffic lights, signs, or signals, prevent interference with the effectiveness of traffic regulations, promote the prosperity, economic well-being, and general welfare of the State, mitigate the adverse secondary effects of sexually-oriented businesses and limit harm to minors, promote the safety, convenience, and enjoyment of travel on and protection of the public investment in highways within this State, and preserve and enhance the natural scenic beauty or aesthetic features of the highways and adjacent areas, the General Assembly declares it to be the policy of this State that the erection and maintenance of outdoor advertising signs, displays, and devices in areas adjacent to the rights-of-way of the interstate and federal-aid primary systems within this State must be regulated in accordance with the terms of this article which provide for standards consistent with customary use in this State and finds that all outdoor advertising devices which do not conform to the requirements of this article are illegal. It is the intention of the General Assembly in this article to provide a statutory basis for regulation of outdoor advertising consistent with the public policy relating to areas adjacent to interstate and federal-aid primary systems declared by Congress in Title 23, United States Code, "Highways".
S.C. Code § 57-25-130
2006 Act No. 235, Section 6, provides as follows:
"This act takes effect upon approval by the Governor. Nothing in this act preempts or otherwise alters, modifies, applies to, or effects relocation or removal of any off-premises outdoor advertising signs pursuant to an ordinance or regulation enacted by a local governing body prior to April 14, 2005. It is the intent of the General Assembly that nothing in this act may be construed to require the payment of monetary compensation for any off-premises outdoor advertising signs relocated or removed pursuant to an ordinance enacted before the effective date of this act unless the ordinance otherwise requires the payment of monetary compensation."