Tex. Occ. Code § 604.304
(a) Not later than the 20th day after the date the person receives the notice under Section 604.303, the person may:
Acts 1999, 76th Leg., ch. 388, Sec. 1, eff. Sept. 1, 1999.
Acts 2015, 84th Leg., R.S., Ch. 1 (S.B. 219), Sec. 5.204, eff. April 2, 2015.
Acts 2015, 84th Leg., R.S., Ch. 838 (S.B. 202), Sec. 2.189, eff. September 1, 2015.