Tex. Health & Safety Code § 285.025
(a) Bonds issued under this subchapter must mature serially or otherwise not more than 40 years after they are issued. The bonds may:
Acts 1989, 71st Leg., ch. 678, Sec. 1, eff. Sept. 1, 1989.
Amended by Acts 2001, 77th Leg., ch. 1420, Sec. 8.263, eff. Sept. 1, 2001.