Ariz. Rev. Stat. § 48-4503
B. On or before the third Monday in August of each year, beginning in the fourth calendar year in which the district is established, the board of directors shall fix the amount to be raised by ad valorem property taxation and shall certify to the respective county boards of supervisors a tax sufficient to raise that amount. The total tax to be levied for all purposes pursuant to this section for a taxable year shall not exceed a rate of two cents per one hundred dollars of assessed valuation of all taxable property in the district. The board of directors shall approve the amount to be raised by taxation under this section as follows: