S.C. Code Ann. § 9-13-120

All moneys ordered to be paid by the board of trustees shall be paid by the treasurer only upon warrants signed by the president of the board and countersigned by the secretary thereof or, in the absence of either one or both of such officers, by the president and secretary pro tem, as may be appointed by the board of trustees at a meeting called for that purpose, and no warrant shall be drawn except by order of the board, duly entered in the records of the proceedings of the board.