(a) The district is composed of the territory described by Section 23.04(b), Chapter 165, Acts of the 75th Legislature, Regular Session, 1997, enacting former § 376.004, Local Government Code, and by Section 1, Chapter 360, Acts of the 76th Legislature, Regular Session, 1999, as that territory may have been modified under:
(1) Subchapter J, Chapter 49, Water Code; or
(2) other law.
(b) The boundaries and field notes of the district contained in Section 23.04(b), Chapter 165, Acts of the 75th Legislature, Regular Session, 1997, enacting former § 376.004, Local Government Code, and in Section 1, Chapter 360, Acts of the 76th Legislature, Regular Session, 1999, form a closure. A mistake in the field notes or in copying the field notes in the legislative process does not in any way affect:
(1) the district’s organization, existence, and validity;
(2) the district’s right 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 the bond;
(3) the district’s right to impose and collect an assessment or tax;
(4) the validity of the enlargement of the district under Section 1, Chapter 360, Acts of the 76th Legislature, Regular Session, 1999; or
(5) the legality or operation of the district or the board.