(a) The district is composed of the territory described by Section 3, Chapter 780, Acts of the 78th Legislature, Regular Session, 2003, as that territory may have been modified under:
(1) Subchapter J, Chapter 49, Water Code;
(2) Subchapter H, Chapter 65, 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 refunding bonds or to pay the principal of and interest on the bonds; or
(3) the legality or operation of the district or the board.