S.C. Code § 58-3-20
1980 Act No. 440, Section 3, provides as follows:
"SECTION 3. Notwithstanding the provisions of Act 223 of 1979 and Section 58-3-20 of the 1976 Code, incumbent members of the Public Service Commission serving as commissioners on the effective date of this act (May 26, 1980), shall continue to serve as commissioners until July 1, 1981 unless their successors are elected prior to that date."
1982 Act No. 485, Sections 1 and 2, effective March 5, 1982, provide as follows:
"SECTION 1. The General Assembly finds that pursuant to Section 58-3-20 of the 1976 Code it is required to provide for the election of seven members of the Public Service Commission during the 1982 session, one from each of the six congressional districts established according to the official United States Census of 1980, and one to be elected at large. The candidates for election by the General Assembly must be nominated by the Public Service Commission Merit Selection Panel and screened by the Joint Legislative Screening Committee.
"The General Assembly further finds that, because a congressional reapportionment plan for South Carolina based upon the 1980 census has not been enacted, the Merit Selection Panel has been substantially delayed in its screening and nominating of candidates for consideration by the General Assembly. In order to eliminate the confusion surrounding the screening and nominating of candidates for the Public Service Commission due to the uncertainty of the new congressional districts, the General Assembly, by the adoption of this Joint Resolution, has determined to establish the election districts for the purpose of electing members of the Public Service Commission during 1982 only.
"SECTION 2. Notwithstanding the provisions of Section 58-3-20 of the 1976 Code and only for purposes of the 1982 election, those members of the Public Service Commission to be elected in 1982 shall be elected from the six congressional districts as they were constituted on January 1, 1981 and one member from the state at large. The term of each of the seven commissioners elected in 1982 shall be for four years and until their successors are elected and qualify.
"In the event vacancies occur on the Commission during the term of those commission members elected in 1982, successors shall be elected from the six congressional districts as those districts were constituted on January 1, 1981, and one member from the state at large, for the remainder of the unexpired term or terms. Members of the Commission whose terms expire July 1, 1982, shall continue to serve as commissioners until their successors are elected and qualify pursuant to the provisions of this resolution for terms extended until the General Assembly provides for the election of members of the Commission based upon the seven public service commission districts as they were constituted on January 1, 1981."
2012 Act No. 279, Section 33, provides as follows:
"Due to the congressional redistricting, any person elected or appointed to serve, or serving, as a member of any board, commission, or committee to represent a congressional district, whose residency is transferred to another district by a change in the composition of the district, may serve, or continue to serve, the term of office for which he was elected or appointed; however, the appointing or electing authority shall appoint or elect an additional member on that board, commission, or committee from the district which loses a resident member as a result of the transfer to serve until the term of the transferred member expires. When a vacancy occurs in the district to which a member has been transferred, the vacancy must not be filled until the full term of the transferred member expires. Further, the inability to hold an election or to make an appointment due to judicial review of the congressional districts does not constitute a vacancy."