S.C. Code Ann. § 35-2-109
(b) To be approved under this section, the resolution must be approved by:
(1) each voting group entitled to vote separately on the proposal by a majority of all the votes entitled to be cast by that voting group, with the holders of the outstanding shares of a class being entitled to vote as a separate voting group if the proposed control share acquisition, if fully carried out, would result in any of the following changes: