Tex. Water Code § 51.506: CHANGE TAX PLAN.

If after a tax plan is adopted the directors find that the best interest of the district and the necessity to maintain adequately and equitably the district's tax requires a change in the tax plan, the board may give notice, hold a hearing, and determine a new plan in the manner provided in Sections 51.502-51.505 of this code.

Acts 1971, 62nd Leg., p. 350, ch. 58, Sec. 1, eff. Aug. 30, 1971.