Tex. Water Code § 13.343
(a) The owner of a utility that supplies retail water service may not contract to purchase from an affiliated supplier wholesale water service for any of that owner's systems unless:
(b) The utility may not purchase groundwater from any provider if:
Added by Acts 2001, 77th Leg., ch. 966, Sec. 10.07, eff. Sept. 1, 2001.
Acts 2013, 83rd Leg., R.S., Ch. 170 (H.B. 1600), Sec. 2.65, eff. September 1, 2013.
Acts 2013, 83rd Leg., R.S., Ch. 171 (S.B. 567), Sec. 65, eff. September 1, 2013.