This subpart and part shall be deemed to provide an additional and alternative method for the doing of the things authorized thereby, shall be regarded as supplemental and additional to any powers conferred by other laws upon the authority, and shall not be regarded as in derogation of any such powers; provided, however, that the issuance of bonds or notes under this subpart need not comply with the requirements of any other law applicable to the issuance of bonds or notes.
OCGA § 20-3-358