Tex. Occ. Code § 2051.453
(a) A person who is the subject of a preliminary report issued under Section 2051.452 shall, not later than the 20th day after the date the report is sent:
(2) request in writing from the secretary a hearing relating to:
Acts 1999, 76th Leg., ch. 388, Sec. 1, eff. Sept. 1, 1999.