S.C. Code Ann. § 31-10-120
(a) The commission has the power to issue bonds from time to time for any of its corporate purposes including the payment of principal and interest upon any advances for surveys and plans for redevelopment projects. The commission also has the power to issue refunding bonds for the purpose of paying or retiring or in exchange for bonds previously issued by it. The commission may issue bonds on which the principal and interest are payable: