S.C. Code Ann. § 11-40-90
(A) The authority has the power and is authorized from time to time to issue bonds, including refunding bonds, in the principal amounts it determines to be necessary or convenient to provide amounts necessary for any corporate purposes, and to use the proceeds thereof for the purpose of:
(B) At or before the delivery of bonds by the authority, the authority, by resolution of the authority, certificate of an officer or employee of the authority, or other manner as the authority determines, shall establish with respect to all bonds of the authority then outstanding and then proposed to be delivered that, following the period during which interest on bonds or loan obligations is capitalized, either: