Tex. Est. Code § 355.052
The failure of a personal representative to timely allow or reject a claim under Section 355.051 constitutes a rejection of the claim. If the claim is established by suit after that rejection:
Added by Acts 2009, 81st Leg., R.S., Ch. 680 (H.B. 2502), Sec. 1, eff. January 1, 2014.