Tex. Prop. Code § 208.009
An owner may not assert as a defense to the enforcement of a restrictive covenant that is part of a common scheme for preservation of historic property that the owner or a predecessor in title signed a blank signature page or similar procedural defect if the signature page was attached to a dedicatory instrument adopted by a historic neighborhood preservation association and:
Added by Acts 1999, 76th Leg., ch. 871, Sec. 2, eff. June 18, 1999. Renumbered from Sec. 207.009 by Acts 2001, 77th Leg., ch. 1420, Sec. 21.001(98), eff. Sept. 1, 2001.