S.C. Code § 38-75-40
No insurer or agency licensed to do business in this State may issue any policy or contract of insurance covering property in this State which contains any clause or provision requiring the insured to take or maintain a larger amount of insurance than that expressed in the policy or in any way provides that the insured is liable as a coinsurer with the insurer issuing the policy for any part of the loss or damage to the property described in the policy. Any such clause or provision is void. However, such a clause or provision may be used if there is stamped on the filing face of the policy or printed in bold type at the top of the clause the words "coinsurance clause". If there is a difference in the rate for insurance with and without the coinsurance clause, the rates for each must be furnished the insured upon request.
S.C. Code § 38-75-40