S.C. Code Ann. § 59-131-100: Sales of bonds.

The bonds shall be disposed of in such manner as the trustees shall determine, except that no sale shall be made unless the approval of the State Board shall be obtained. If the trustees shall elect to sell the bonds at public sale, at least one advertisement thereof shall appear in some newspaper of general circulation in South Carolina not less than ten days prior to the occasion fixed for the opening of bids.