Ariz. Rev. Stat. § 45-2641
A. Except as provided in subsection B of this section, a person shall not use water withdrawn or diverted within the Gila river maintenance area impact zone to irrigate land within the Gila river maintenance area unless the land was irrigated with water from any source at any time from January 1, 2000 through the effective date of this section. For the purposes of this section, water is withdrawn or diverted within the Gila river maintenance area impact zone if one of the following applies:
B. This section does not apply to: