(a) The contract may provide for the issuance of bonds by the contributor and for direct payment from the proceeds of the bonds to contractors on the estimates of the engineer for the contributor.
(b) Before issuing bonds, a contributing political subdivision shall submit the contract for contribution to its electors for approval and for authority to issue the bonds, fix a lien to secure the bonds, and levy, assess, and collect taxes to retire the bonds. The procedure by a contributing political subdivision of the state shall conform to the applicable law under which the political subdivision was organized and authorized to create bonded indebtedness.
(c) The disposition of the proceeds of the bonds shall conform to the approved contract of contribution.