S.C. Code Ann. § 1-1-120: Vacancies in executive department.

In case any vacancy shall occur in the office of Secretary of State, State Treasurer, Comptroller General, Attorney General or Adjutant General, such vacancy shall be filled by election by the General Assembly, a majority of the votes cast being necessary to a choice. If such vacancy occur during the recess of the General Assembly, the Governor shall fill the vacancy by appointment until an election by the General Assembly at the session next ensuing such vacancy.