(a) The principal of, premiums, if any, interest on, and trustees' and paying agents' fees in connection with the bonds shall be secured by a lien on and pledge of, and shall be payable from, the pledged revenues defined in § 14-95-608.
(b) The authorizing resolution or trust indenture shall set forth details of the nature and extent of the lien and pledge, including provisions for the use of surplus revenues, if any, for any other lawful purposes.