S.C. Code Ann. § 55-1-80

(A) Any county aviation commission or like authority may be increased by two members, one of whom must be appointed by the House of Representatives' delegation of the county and one of whom must be appointed by the Senatorial delegation of the county. The additional members shall serve terms of the same length as other members of the commission or like authority. (B) Any county governing body who has the authority to appoint members to the aviation commission or like authority may add two members for terms as provided in this section. (C) In counties that have two municipalities with a population in excess of fifty thousand persons according to the latest official United States Census, and the county has an aviation commission or like authority, then the mayors of such municipalities having a population in excess of the fifty thousand persons shall serve, ex officio, as members of the commission or authority. (D) The provisions of this section do not apply in the case of any multicounty aviation commission or authority. Effect of Amendment 2015 Act No. 10, SECTION 1, unreserved and added the section. The section had been reserved by 2012 Act No. 270. The new section is the text prior to being reserved with the addition of (D).