S.C. Code § 7-17-50
The board shall hear the protest or contest on Monday next following the deadline for filing the protest or contest. Testimony at the hearing of the protest shall be limited to the grounds stated in the written protest.
The protestant and each other candidate in the protested race have the right to be present at the hearing, to be represented by counsel, to examine and cross-examine witnesses, and to produce evidence relevant to the grounds of the protest.
The chairman of the board shall provide for and conduct the hearing as nearly as possible in accordance with the procedures and rules of evidence observed by the circuit courts of this State. The chairman shall have authority to administer oaths and subpoena witnesses. Upon the conclusion of the hearing of the protest, the board shall determine all issues by majority vote and forthwith certify the results of the election.
The board shall remain in session until a conclusion has been reached. All candidates in the protested or contested race and the chairman of the State Board of Canvassers shall be immediately notified of the board's decision.
The county board must submit the written transcript of the record of the hearing on the protest to the State Board of Canvassers not later than noon Monday, following the protest hearing before the county board.
S.C. Code § 7-17-50