(a) The district is composed of the territory described by Section 1, Chapter 1017 , Acts of the 76th Legislature, Regular Session, 1999, enacting former Section 376.304, Local Government Code, as that territory may have been modified under:
(1) Section 3809.107 or its predecessor statutes, former Section 376.316, Local Government Code, as added by Chapter 1017 , Acts of the 76th Legislature, Regular Session, 1999, and former Section 376.366, Local Government Code;
(2) Subchapter J , Chapter 49 , Water Code; or
(3) other law.
(b) The boundaries and field notes of the district contained in Section 1, Chapter 1017 , Acts of the 76th Legislature, Regular Session, 1999, enacting former Section 376.304, Local Government Code, form a closure. A mistake in the field notes or in copying the field notes in the legislative process does not affect the district's:
(1) organization, existence, or validity;
(2) right to issue any type of bond for a purpose for which the district is created or to pay the principal of and interest on a bond;
(3) right to impose or collect an assessment; or
(4) legality or operation.