S.C. Code Ann. § 5-19-120

The members of any such commission shall be of good moral character and not less than thirty years of age and shall possess the qualifications and requirements in force with respect to other officers of the city and shall take a similar oath of office. They shall be and remain residents of the municipality during their term of office and shall be subject to removal from office only for cause and after written charges have been preferred and sustained by a two-thirds vote of the city council.