Ariz. Rev. Stat. § 48-716
On or before July 15 each year, the treasurer shall prepare a proposed budget for the ensuing fiscal year to be submitted to the district board for approval. The district board shall indicate its approval of the budget by resolution, which shall provide for a hearing on the budget as approved. Notice of the hearing on the budget shall be provided in the manner prescribed by section 48-715. The municipality or county may review the proposed annual budget and may submit written comments to the district board for its assistance and information in adopting its annual budget. At the conclusion of the budget hearing, the district board, by resolution, shall adopt the budget as finally approved by the district board. The budget shall be adopted before October 1 each year.
A.R.S. § 48-716