Ariz. Rev. Stat. § 48-5705
A. A board of at least three directors shall govern the district. Board members shall be elected or appointed as provided in this subsection. The petition for establishment of the district shall specify the number of directors and the dates of elections and of expiration of terms of the directors. For any district, membership on the board shall include the following:
D. A person who is qualified to vote pursuant to subsection A, paragraph 4 of this section is a person who is all of the following: