S.C. Code § 54-5-20
For the purpose of exercising the power vested in such city under the provisions of Section 54-5-10, there is hereby created for each such city a commission which shall be known as the port utilities commission of __________ (naming the city). This commission shall be composed of nine members and their successors in office who shall, as commissioners, serve in such capacity without compensation. Five of such commissioners shall be voted for by the qualified registered electors as herein provided. Two of such commissioners so elected shall serve until the next ensuing general election for such city and three of such commissioners so elected shall serve until the second next general election of such city. The commissioners who shall serve for the short and long terms shall be determined according to the number of votes received by such commissioners, respectively, the commissioners receiving the highest number of votes, respectively, to serve for the long term and the other commissioners to serve for the short term. Whenever a tie vote shall have resulted in such election, the respective terms of those commissioners so tying shall be determined by lot cast in the presence of the election commissioners as a whole. The term of office of each commissioner elected by the qualified electors after the first term herein provided for shall be eight years. The remaining four commissioners shall be the mayor of such city, ex officio, the chairman of the committee on railroads of the city council of such city, ex officio, and two commissioners who shall be appointed by the Governor and who shall hold office for a term of two years.
S.C. Code § 54-5-20