Texas Civil Practice and Remedies Code - CIV PRAC & REM § 147.044. Notice

(a) A claimant may not commence an action unless the claimant gave notice to the defendant before the 60th day preceding the date the action commences.

(b) If the 60-day notice requirement under Subsection (a) would prevent commencing the action before the expiration of the period of limitation or repose, the claimant must give notice to the defendant before the 31st day after the date the action commences.

(c) If the action is a counterclaim, cross-claim, or third-party action, the claimant must give notice to the defendant before the 31st day after the date of service on the defendant.

(d) The notice must: