S.C. Code Ann. § 4-29-150

Neither this chapter nor anything herein contained shall be construed as a restriction or limitation upon any powers which a county or incorporated municipality might otherwise have under any laws of this State, but shall be construed as cumulative. Subject to the limitations and requirements of Chapter 9, Title 4, of the 1976 Code, the authorizations herein granted may be carried out by any governing board acting at any regular or special meeting and without publication of the proceedings, notwithstanding any restriction, limitation, or other procedure, imposed upon the governing board by any other statute.