(a) The district is initially composed of the territory described by Section 2 of the Act creating this chapter.
(b) The boundaries and field notes contained in Section 2 of the Act creating this chapter form a closure. A mistake made in the field notes or in copying the field notes in the legislative process does not affect:
(1) the organization, existence, or validity of the district;
(2) the right of the district to impose taxes; or
(3) the legality or operation of the district or the board.