(a) A county may submit bonds that have been authorized by the commissioners court and any record relating to their issuance to the attorney general for examination as to their validity. If the bonds state that they are secured by a pledge of proceeds of a contract between the county and a public agency, the county may submit to the attorney general a copy of the contract and the proceedings of the public agency authorizing the contract.
(b) If the attorney general finds that the bonds have been authorized and any contract has been made in accordance with state law, the attorney general shall approve the bonds and contract and the comptroller shall register the bonds.
(c) Following approval and registration, the bonds and the contract are incontestable.