Texas Local Government Code - LOC GOV'T § 320.075. Approval and Registration

(a) After any bonds have been authorized by the commissioners court, the bonds and the records relating to their issuance shall be submitted to the attorney general for examination and approval. The attorney general shall approve the bonds if issued in accordance with this subchapter.

(b) After the bonds have been approved by the attorney general, they shall be registered by the comptroller of public accounts.

(c) When the bonds have been approved by the attorney general, registered by the comptroller, and delivered to the purchasers, they are incontestable.

(d) If the bonds recite that they are secured partially or otherwise by a pledge of the proceeds of or income from any contract, including a lease or other agreement, a copy of the contract and of the records of the proceedings authorizing the contract may be submitted to the attorney general with the bond record. In that event, the approval of the bonds by the attorney general constitutes an approval of the contract, and the contract is incontestable except for forgery or fraud.