(a) The district is composed of the territory described by Section 2, Chapter 598, Acts of the 59th Legislature, Regular Session, 1965, as that territory may have been modified under:
(1) Subchapter O, Chapter 51, Water Code;
(2) Subchapter J, Chapter 49, Water Code;
(3) Section 9033.005 of this chapter or its predecessor statute, former Section 16, Chapter 598, Acts of the 59th Legislature, Regular Session, 1965; or
(4) other law.
(b) The boundaries and field notes of the district form a closure. A mistake in the field notes or in copying the field notes in the legislative process does not affect:
(1) the district's organization, existence, or validity;
(2) the district's right to issue any type of bond or to pay the principal of and interest on the bond;
(3) the district's right to impose a tax; or
(4) the legality or operation of the district or the board.