Tex. Tax Code § 11.422
(a) If the chief appraiser denies a timely filed application for an exemption under Section 11.21 for a school that otherwise qualified for the exemption on January 1 of the year but that did not satisfy the requirements of Subsection (d)(5) of that section on that date, the school is eligible for the exemption for the tax year if the school:
(1) satisfies the requirements of Section 11.21(d)(5) before the later of:
(b) If the chief appraiser cancels an exemption for a school under Section 11.21 that was erroneously allowed in a tax year because the appraiser determines that the school did not satisfy the requirements of Section 11.21(d)(5) on January 1 of that year, the school is eligible for the exemption for that tax year if the school:
Added by Acts 1991, 72nd Leg., ch. 836, Sec. 6.2, eff. Sept. 1, 1991.
Amended by Acts 1997, 75th Leg., ch. 1039, Sec. 17, eff. Jan. 1, 1998;
Acts 1997, 75th Leg., ch. 1411, Sec. 5, eff. June 20, 1997.