S.C. Code Ann. § 38-73-510: Nonpartisan rating bureau for workers' compensation.

Every workers' compensation insurer, including the parties to any mutual insurance association, must be a member of a nonpartisan rating bureau. The stock and nonstock insurers which are members of the bureau must be represented in the bureau management and on all committees of the bureau. One-half of the members of each committee must be chosen by the stock companies and one-half by the nonstock companies. In a case of a tie vote on any committee the director or his designee shall cast the deciding vote.