S.C. Code Ann. § 7-5-20: Deputy members of boards.

The board of voter registration and elections of each county may appoint deputy members of the board, in numbers as may be necessary, whose terms shall be for a period of time as determined by the boards. The deputy members shall have the same powers and duties as regular members of the board. The clerk to each board may be made a deputy member of the board for the purpose of taking applications.