(a) The authority is composed of the territory described by Section 2.02(a), Chapter 427, Acts of the 44th Legislature, 1st Called Session, 1935, as that territory may have been modified under:
(1) Subsection (c) or its predecessor statute, Section 2.02(c), Chapter 427, Acts of the 44th Legislature, 1st Called Session, 1935;
(2) Subchapter J, Chapter 49, Water Code; or
(3) other law.
(b) The board shall record in the authority’s minutes the written description of the boundaries in Section 2.02(a), Chapter 427, Acts of the 44th Legislature, 1st Called Session, 1935.

(c) If the directors find any land included in the field notes, other than land in San Patricio, Nueces, and Jim Wells Counties, that is not actually included in the watershed of the Nueces River, the board shall exclude the land from the authority and file a certificate of exclusion with the county clerk of the county in which the land is located. The certificate of exclusion must describe the boundaries of the land excluded so that the land remaining in the authority may be adequately identified.
(d) The boundaries and field notes of the authority form a closure. A mistake in the field notes or in copying the field notes in the legislative process does not affect:
(1) the authority’s organization, existence, or validity;
(2) the authority’s right to issue any type of bond for a purpose for which the authority is created or to pay the principal of or interest on the bond;
(3) the right to impose a tax; or
(4) the legality or operation of the authority or its governing body.