Tex. Loc. Gov't Code § 61.001
The following municipalities may consolidate under one government in the manner provided by this chapter:
(2) two noncontiguous municipalities located in the same county if:
Acts 1987, 70th Leg., ch. 149, Sec. 1, eff. Sept. 1, 1987.
Acts 2007, 80th Leg., R.S., Ch. 473 (H.B. 2212), Sec. 1, eff. June 16, 2007.