S.C. Code Ann. § 44-7-1720

This article must not be construed as a restriction or limitation upon any powers which a county might otherwise have under any laws of this State but must be construed as cumulative. The authorization granted in this article may be carried out by a county board acting at a regular or special meeting and without publication of the proceedings by a resolution to become effective upon its adoption at the meeting at which it is presented, notwithstanding any restriction, limitation, or other procedure, imposed upon the county board by any laws of this State.