Section 51.537 - Municipality's Authority Regarding Defined Area(a) This section applies only to a municipality any portion of which is located in a county with a population of more than 1.2 million and less than 1.5 million. (b) A municipality may not annex a part of a defined area in a district that has adopted a plan for the defined area under this subchapter unless:(1) 90 percent or more of all facilities and infrastructure described by the plan has been installed and completed; and(2) the municipality: (A) annexes all of the defined area that is within the municipality's extraterritorial jurisdiction; and(B) assumes the pro rata share of the bonded indebtedness of the annexed area.(c) After the annexation occurs: (1) the annexed area is not eligible to be a defined area under this subchapter; and(2) the district may not impose in the annexed area a tax authorized for a defined area under this subchapter.Amended by Acts 2023, Texas Acts of the 88th Leg.- Regular Session, ch. 644,Sec. 281, eff. 9/1/2023.Amended By Acts 2011, 82nd Leg., R.S., Ch. 1163, Sec. 182, eff. 9/1/2011.Added by Acts 2005, 79th Leg., Ch. 962, Sec. 3, eff. 6/18/2005.