(a) The authority is composed of the territory described by Subsection (b) as that territory may have been modified under:(1) Subchapter J, Chapter 49, Water Code;(2) Subchapter O, Chapter 51, Water Code;(3) Subchapter H, Chapter 62, Water Code; or(4) other law.(b) The authority is composed of:(1) the whole of each county in this state located wholly or partly in the watershed of the Red River and its tributaries in this state whose confluences with the Red River are upstream from the northeast corner of Bowie County, as shown by contour maps on file with the Texas Water Development Board; and(2) the whole of Hartley, Hutchinson, Lamar, Lipscomb, and Red River Counties.(c) A defect or irregularity in the boundary or an overlap or conflict of the boundary with another authority or district does not affect the authority's validity. Added by Acts 2021, 87th Leg., R.S., Ch. 914 (H.B. 3530), Sec. 1.03, eff. April 1, 2023.