S.C. Code Ann. § 11-35-1524
(B) As used in this section, unless the context indicates otherwise, the terms below have the following meanings:
(5) "Unreasonable Cost" means:
(6) "Resident vendor" means a vendor who is considered to be a resident of this State if the vendor:
(C) Application. Competitive procurements made by governmental bodies shall be made from vendors resident to South Carolina or vendors who bid end-products made, manufactured, or grown in South Carolina or in the United States if available, provided that (1) the bidder has certified in writing in the bid that he or she is resident to the State, or (2) the bidder has certified in writing in the bid that the end-product was made, manufactured, or grown in South Carolina or in the United States, (3) the end-product is available, and (4) the cost of the end-product is not unreasonable. In order to receive the award the vendor must be a responsible and responsive bidder, and the bid must otherwise comply with the Procurement Code and Regulations.
In the case of a request for resident vendor status, this requirement shall apply to the entire solicitation. In the case of a request for end-product status, this requirement shall apply to each line item or each lot in a solicitation to which a separate, responsive bid may be made.
(D) Exceptions. This section shall not apply:
(E) Enforcement. A bidder shall be suspended or debarred from doing business with the State in accordance with Section 11-35-4220 of the South Carolina Consolidated Procurement Code if the chief procurement officer determines that the certification made by the bidder as to the resident vendor request or the origin of the end-product was filed under false pretenses and is not valid. In addition, if the bidder with the invalid certification of origin was awarded the contract, he shall also pay the State of South Carolina the amount by which the bid based on the invalid certification exceeded the lowest responsible and responsive bid that would have been selected but for the invalid certification.
If a bidder has not requested the preference, he will neither be entitled to claim any preference against another bidder nor will he be protected from application of another bidder's claim to a preference against his bid in determining contract award.