Tex. Utilities Code § 104.374

(a) Customer rate relief bonds issued under this subchapter and any related ancillary agreements or credit agreements are not a debt or pledge of the faith and credit of this state or a state agency or political subdivision of this state. A customer rate relief bond, ancillary agreement, or credit agreement is payable solely from customer rate relief charges as provided by this subchapter.

(b) Notwithstanding Subsection (a), this state, including the railroad commission and the authority, pledges for the benefit and protection of the financing parties and the gas utility that this state will not take or permit any action that would impair the value of customer rate relief property, or, except as permitted by Section 104.370, reduce, alter, or impair the customer rate relief charges to be imposed, collected, and remitted to financing parties until the principal, interest and premium, and contracts to be performed in connection with the related customer rate relief bonds and financing costs have been paid and performed in full. Each issuing financing entity shall include this pledge in any documentation relating to customer rate relief bonds.

(c) Before the date that is two years and one day after the date that an issuing financing entity no longer has any payment obligation with respect to customer rate relief bonds, the issuing financing entity may not wind up or dissolve the financing entity's operations, may not file a voluntary petition under federal bankruptcy law, and neither the board of the issuing financing entity nor any public official nor any organization, entity, or other person may authorize the issuing financing entity to be or to become a debtor under federal bankruptcy law during that period. The state covenants that it will not limit or alter the denial of authority under this subsection, and the provisions of this subsection are hereby made a part of the contractual obligation that is subject to the state pledge made in this section.