Tex. Spec. Dist. Code § 8801.115
At least once each year and at any other time the board considers necessary, the board shall have its staff and, if necessary, the staff of the Texas Water Development Board make a complete study of the groundwater in the district and determine:
Acts 2003, 78th Leg., ch. 1277, Sec. 1, eff. April 1, 2005.
Acts 2013, 83rd Leg., R.S., Ch. 1187 (S.B. 1031), Sec. 4, eff. June 14, 2013.