Tex. Gov't Code § 2306.451
(a) The state pledges to and agrees with the holders of bonds issued under this chapter that it will not limit or alter the rights vested in the department under this chapter to fulfill the terms of an agreement made with a bondholder or impair the rights and remedies of a bondholder until the following obligations are fully discharged:
Added by Acts 1993, 73rd Leg., ch. 268, Sec. 1, eff. Sept. 1, 1993.