Ariz. Rev. Stat. § 48-1713
A. Persons qualified to vote at an election held under this chapter, except as otherwise specially provided, shall be either:
B. The bona fide owners of real property in the district that is or may be beneficially served by the district may petition the board of directors to adopt an acreage system of voting in the district. The petition must be dated and signed personally by the petitioners, representing the acreage in the district that each petitioner owns, and filed with the secretary of the board of directors. If the board determines that the petitioners own at least fifty-one per cent of the total acreage in the district that is or may be beneficially served by the district, the board may adopt a resolution changing the manner of voting in the district to an acreage system of voting. Thereafter, all district elections shall be held and conducted on the acreage system. Under an acreage system of voting:
C. For the purposes of this section, "ownership" includes: