Tex. Health & Safety Code § 401.390
(a) On the date the court's judgment that an administrative penalty against a person should be reduced or not assessed becomes final, the court shall order that:
(b) Accrued interest on amounts remitted by the department shall be paid:
Acts 1989, 71st Leg., ch. 678, Sec. 1, eff. Sept. 1, 1989.
Amended by Acts 1995, 74th Leg., ch. 76, Sec. 11.241, eff. Sept. 1, 1995;
Acts 1997, 75th Leg., ch. 1072, Sec. 58, eff. Sept. 1, 1997.
Acts 2015, 84th Leg., R.S., Ch. 1 (S.B. 219), Sec. 3.0928, eff. April 2, 2015.