S.C. Code Ann. § 38-79-180

The association shall submit, for the approval of the director or his designee, all policy forms, classifications, rates, rating plans, or rules applicable to its insurance product offerings to customers in this State. Such filings must be submitted for approval to the director no less than sixty days prior to their intended effective date. The director may extend the time for his review by an additional sixty days to allow the department sufficient time to evaluate the proposed form, classification, rate, rating plan, or rule to be used by the association. Rates must be actuarially sound, self supporting, and may not be excessive, inadequate, or unfairly discriminatory.