Tex. Water Code § 15.212

(a) On receipt by the executive administrator from the paying agent for any insured bond of a written notice by registered or certified mail that a payment on the bond is due but has not been made to the paying agent by the issuer and that the issuer's reserves are insufficient to cover the payment, the executive administrator shall have a deposit of funds made with the paying agent sufficient to cover the payment due on the bond less any amount already held by the paying agent to pay the principal of and interest on the bond.

(b) On transfer of the payment to the paying agent under Subsection (a) of this section and on receipt of the uncanceled bond or coupon, the state becomes the owner of the bond or coupon and is subrogated to the rights of the bondholder with respect to the amount paid by the state.

(c) After making payment on the bonds under Subsection (a) of this section, the board shall attempt to collect from the issuer the amount paid by the state. The board may enter into agreements for the issuer to pay those claims, may enforce any provisions of the bonds relating to actions that may be taken by bondholders on default, or may sue the issuer to collect amounts paid by the state. The attorney general, at the request of the board, shall take all necessary legal action to assist the board in carrying out this subsection.

(d) Money collected under Subsection (c) of this section shall be deposited in the special reserve fund up to the amount used from that fund to pay the defaulted bonds. Any remaining money collected and not deposited in that fund shall be deposited in the general revenue fund.