During years when a scarcity of water exists, owners of lands shall have preference to the water for irrigation according to the dates of their appropriation or their occupation of the lands, either by themselves or their grantors. The oldest titles shall have precedence.
A.R.S. § 45-175
Chronological preference to water in times of scarcity
Official source: Arizona State Legislature. Reproduced from public-domain Arizona statutes; confirm against the official source for the current text. Not legal advice.