Tex. Spec. Dist. Code § 1035.153
(a) If the board finds that annexation of territory into the district is in the district's best interest, the board shall, not later than the 90th day after the date the finding is made:
Added by Acts 2009, 81st Leg., R.S., Ch. 1139 (H.B. 2619), Sec. 1.01, eff. April 1, 2011.