Tex. Water Code § 55.656: DISTRICTS ADOPTING BENEFIT PLAN OF TAXATION.

In any district other than a district operating under a contract with the United States which is operating under the provisions of Article XVI, Section 59, of the Texas Constitution, and which adopted the assessment of benefit plan of taxation, tax values shall be fixed, levied, assessed, equalized, and collected in the manner provided in Sections 55.657-55.669 of this code.

Acts 1971, 62nd Leg., p. 484, ch. 58, Sec. 1, eff. Aug. 30, 1971.