S.C. Code § 38-81-330
After the initial year of operation, rates, rating plans, and rating rules, and any provision for recoupment through policyholder assessment or premium rate increase must be based upon the association's loss and expense experience and investment income, together with any other information based upon this experience and income as the director or his designee considers appropriate. The resultant premium rates must be on an actuarially sound basis and must be calculated to be self-supporting.
If sufficient funds are not available for the sound financial operation of the association, pending recoupment as provided in Section 38-81-320, all members, on a temporary basis, shall contribute to the financial requirements of the association in the manner provided for in Section 38-81-340. Any such contribution must be reimbursed to the members following recoupment as provided in Section 38-81-320.
S.C. Code § 38-81-330