S.C. Code Ann. § 11-51-120: Maturity, payment, and interest rates.

The general obligation debt must bear the date and mature at the time that the state board resolution provides, except that the general obligation debt may not mature more than thirty years from its date of issue. The general obligation debt may be in the denominations, be payable in the medium of payment, be payable at the place and at the time, and be subject to redemption or repurchase and contain other provisions determined by the state board before its issue. The general obligation debt may bear interest payable at the times and at the rates determined by the state board.