(a) The district is composed of the territory described by Section 2, Chapter 246, Acts of the 58th Legislature, Regular Session, 1963, as amended by Sections 1 and 3, Chapter 611, Acts of the 60th Legislature, Regular Session, 1967, as that territory may have been modified under:
(1) Subchapter O, Chapter 51, Water Code;
(2) Subchapter J, Chapter 49, Water Code; or
(3) 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 bonds or to pay the principal of and interest on the bonds;
(3) the district's right to impose a tax; or
(4) the legality or operation of the district or the board.