S.C. Code Ann. § 59-53-161

All bonds shall be disposed of in such manner as the board shall determine, except that no sale, privately negotiated without public advertisement, shall be made unless the approval of the State Fiscal Accountability Authority shall be obtained. If the board shall elect to sell the bonds at public sale, at lease one advertisement thereof shall appear either in a financial paper published in New York City, or some newspaper of general circulation in South Carolina, not less than seven days prior to the occasion fixed for the opening of bids.