(a) Bonds issued under this subchapter may be secured by all or part of the net revenue to be received from a contract for the sale of water by the district to the United States for use at military camps or bases and from all renewals, extensions, or substitutions of the contract.
(b) In addition, the bonds may be secured by a deed of trust lien on the equipment, facilities, and property acquired or constructed with the funds from the sale of the bonds.