S.C. Code Ann. § 59-109-90
(B) The bonds and notes of every issue shall be payable solely out of revenues derived by the authority pursuant to the financing agreement or agreements with respect to the project or projects which such bonds or notes are issued to finance.
Notwithstanding that bonds and notes may be payable from a special fund, they shall be and be deemed to be, for all purposes, negotiable instruments, subject only to the provisions of the bonds and notes for registration.