S.C. Code Ann. § 40-37-30
The members of the board shall qualify by taking the oath of office before a notary public or other officer empowered to administer oaths in the county in which each one, respectively, resides. At the first meeting of the board, after each annual appointment, the board shall elect a president, vice-president and secretary-treasurer. A majority of members of the board shall constitute a quorum. Regular meetings shall be held at least once a year, at such time and place as shall be deemed most convenient. Special meetings may be held upon the call of the president.
If a board member is disqualified and his absence results in the lack of a quorum or an adequate number of board members to perform official functions, then the Governor is authorized to deputize an individual to replace the disqualified board member during the period of disqualification. The individual deputized must take the same oath as required of other members of the board.