S.C. Code Ann. § 12-60-2530
(C) A conference on the appeal must be conducted by the board within thirty days after the date of receiving a notice of appeal, or as soon thereafter as practical. The board shall:
(D) The intervention by an interested person not a party to the action is allowed where:
(F) At least fifteen days before the date of the conference, the assessor shall file with the board:
(I) The conference must be held as follows:
(J) After the conference, the board shall issue a decision based upon the evidence before it as follows:
(3) The written decision of the board shall: