Tex. Loc. Gov't Code § 89.0041
(a) A person filing suit against a county or against a county official in the official's capacity as a county official shall deliver written notice to:
(b) The written notice must be delivered by certified or registered mail by the 30th business day after suit is filed and contain:
Added by Acts 2003, 78th Leg., ch. 1203, Sec. 3, eff. Sept. 1, 2003.
Acts 2005, 79th Leg., Ch. 1094 (H.B. 2120), Sec. 21, eff. September 1, 2005.