S.C. Code Ann. § 41-29-80
The Commission shall classify all positions under Chapters 27 through 41 of this Title, except those exempted by the Federal Social Security Act or regulations of the Secretary of Labor or his successors under authority thereof, and shall establish salary schedules and minimum personnel standards. Such standards shall conform to the minimum standards prescribed under the provisions of Section 303(a)(1) of the Federal Social Security Act, as amended.