S.C. Code Ann. § 57-1-330

(A) All commission members are appointed to a term of office of four years which expires on February fifteenth of the appropriate year. However, a commission member may not serve more than two consecutive terms, and may not serve more than twelve years, regardless of when the term was served. Commissioners shall continue to serve until their successors are appointed and confirmed, provided that a commissioner only may serve in a hold-over capacity for a period not to exceed six months. Any vacancy occurring in the office of commissioner shall be filled by appointment in the manner provided in this article for the unexpired term only. Except for the at-large member, a person is not eligible to serve as a commission member who is not a resident of that district at the time of his appointment. Failure by such commission member to maintain residency in the district for which he is appointed shall result in the forfeiture of his office. (B) An at-large commission member may be appointed from any county in the State unless another commission member is serving from that county. Failure by an at-large commission member to maintain residence in the State shall result in a forfeiture of his office. Commission members may be removed from office at the discretion of the Governor. Effect of Amendment 2017 Act No. 40, SECTION 26, in (B), deleted "subject to the prior approval of the appropriate legislative delegation" following "Governor", and made nonsubstantive changes.