S.C. Code § 59-123-50
The present members of the board of trustees shall continue to serve until July 1, 1966, at which time their terms shall terminate and the members of the board to succeed the present members, and to fill the additional membership provided in Section 59-123-40, must be elected at a joint session of the General Assembly on the following dates: On the first Wednesday in February 1966, members representing the medical profession (medical doctor, dentist, registered nurse, or licensed pharmacist) and on the second Wednesday in February 1966, lay members or nonmedical members. One member of the medical profession from each congressional district and one layman or member of a nonmedical profession from each congressional district must be elected. The terms of all members elected commence on July 1, 1966. Of those first elected, the member who represents the medical profession from the first, second, and third congressional districts and lay members or members of a nonmedical profession from the fourth, fifth, and sixth congressional districts must be elected for terms of four years or until their successors are elected and qualify. The member of the board of trustees who represents the medical profession from the fourth, fifth, and sixth congressional districts and the members who are laymen or members of nonmedical professions from the first, second, and third congressional districts must be elected for terms of two years or until their successors are elected and qualify. Effective July 1, 2012, the member who represents the medical profession from the seventh congressional district must be elected to a term of four years and the lay member or member of a nonmedical profession from the seventh congressional district must be elected for an initial term of two years. Their successors must be elected for terms of four years or until their successors are elected and qualify. After its 1984 session, the General Assembly shall elect successors to those members it elects not earlier than the first day of April for a term to begin the following July first. Elections to fill vacancies on the board which are caused by the death, resignation, or removal of an elective trustee may be held earlier than the first day of April of the year in which the unexpired term terminates, but the term of the person elected to succeed the member expires on the last day of June of the year in which the term of the former member would have expired. In electing members of the board, the General Assembly shall elect members based on merit regardless of race, color, creed, or gender and shall strive to assure that the membership of the board is representative of all citizens of the State of South Carolina.
The term of the at-large trustee appointed by the Governor is effective upon certification to the Secretary of State and is four years. Any vacancy in the office of the member appointed by the Governor must be filled by appointment for the unexpired term in the same manner of original appointment. If the Governor chooses to designate a member to serve in his stead, as permitted by Section 59-123-40, the appointment is effective upon certification to the Secretary of State and shall continue, at the pleasure of the Governor making the appointment, so long as he continues to hold the specified office.
S.C. Code § 59-123-50