(a) The district is composed of the territory described by Section 3, Chapter 1026, Acts of the 70th Legislature, Regular Session, 1987, as that territory may have been modified under:(1) Section 3818.106, or its predecessor, Section 13, Chapter 1026, Acts of the 70th Legislature, Regular Session, 1987;(2) Subchapter J, Chapter 49, Water Code; or(3) other law.(b) The boundaries and field notes of the district contained in Section 3, Chapter 1026, Acts of the 70th Legislature, Regular Session, 1987, form a closure. A mistake made in the field notes or in copying the field notes in the legislative process does not affect:(1) the organization, existence, or validity of the district;(2) the right of the district to issue any type of bond, including a refunding bond, for a purpose for which the district is created or to pay the principal of and interest on a bond;(3) the right of the district to impose an assessment or a tax; or(4) the legality or operation of the district or the board. Added by Acts 2005, 79th Leg., Ch. 729 (H.B. 2019), Sec. 1.03, eff. April 1, 2007.