S.C. Code Ann. § 39-22-180

It is lawful for a warehouseman licensed by the commissioner to operate a state warehouse to execute and enter into an agreement or contract required by the Commodity Credit Corporation or other agency of the United States government when the agreement or contract is necessary to secure the support price for certain stored commodities. Whenever the contract or agreement conflicts with the provisions of the state warehouse system or the Uniform Commercial Code - Documents of Title the conflicting provisions are suspended, but only to the extent that the suspension of the conflicting provisions is a minimum requirement of the agency of the United States government.