S.C. Code Ann. § 4-1-120

If no county appropriation act is enacted at any session of the General Assembly to provide for the county government of any county of the State then the appropriation, terms and conditions contained in the last enacted county appropriation act of such county shall be continued for an additional year; provided, that only usual appropriations and no special appropriations for unusual purposes, if contained in such act, shall be held as appropriated by the continuance of such act.