Tex. Occ. Code § 801.454
(a) Not later than the 20th day after the date a person receives a notice of alleged violation, the person may in writing:
Acts 1999, 76th Leg., ch. 388, Sec. 1, eff. Sept. 1, 1999.
Acts 2005, 79th Leg., Ch. 27 (S.B. 407), Sec. 24, eff. September 1, 2005.
Acts 2025, 89th Leg., R.S., Ch. 874 (S.B. 2155), Sec. 31, eff. September 1, 2025.