S.C. Code Ann. § 11-35-4210
(1) Right to Protest; Exclusive Remedy. Any prospective bidder, offeror, contractor, or subcontractor who is aggrieved in connection with the solicitation of a contract shall protest to the appropriate chief procurement officer in the manner stated in subsection (2) below within fifteen days of the date of issuance of the Invitation For Bids or Requests for Proposals or other solicitation documents, whichever is applicable, or any amendment thereto, if the amendment is at issue.
Any actual bidder, offeror, contractor, or subcontractor who is aggrieved in connection with the intended award or award of a contract shall protest to the appropriate chief procurement officer in the manner stated in subsection (2) below within fifteen days of the date notification of award is posted in accordance with this code.
The rights and remedies granted in this article to a disappointed bidder, offeror, contractor, or subcontractor are to the exclusion of all other rights and remedies of such disappointed bidder, offeror, contractor, or subcontractor against the State at common law or otherwise for the loss or potential loss of an award of a contract under the South Carolina Consolidated Procurement Code.