Texas Health and Safety Code - HEALTH & SAFETY § 362.034. Approval and Registration

(a) An issuer shall submit bonds that have been authorized by its governing body, including refunding bonds and the record relating to the bond 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 lease or contract of sale previously entered into by the issuer, the issuer may submit the contract with the bonds.

(b) If the bonds have been authorized in accordance with state law 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 contract are incontestable.