S.C. Code § 33-39-630
The board of directors shall be elected initially by the incorporators and thereafter at each annual meeting of the corporation or, if no annual meeting shall be held in any year at the time fixed by the bylaws, at a special meeting held in lieu of the annual meeting. At each annual meeting, or at each special meeting held in lieu of the annual meeting, the members of the corporation shall elect four directors and the stockholders shall elect the remaining three. The directors shall hold office until the next annual meeting of the corporation or special meeting held in lieu of the annual meeting after their election and until their successors are elected and qualify, unless sooner removed in accordance with the provisions of the bylaws. Any vacancy in the office of a director elected by the members shall be filled by the directors elected by the members, and any vacancy in the office of a director elected by the stockholders shall be filled by the directors elected by the stockholders.
S.C. Code § 33-39-630