Ariz. Rev. Stat. § 48-6802
A. If the public convenience and necessity require, and on presentation of a petition signed by the owners of at least fifty-one per cent of the net assessed value of the property proposed to be included in the district and a petition signed by at least fifty-one per cent of the property owners in the area proposed to be included in the district, the governing body of one or more municipalities may adopt a resolution declaring its intention to form a district to include property within the corporate boundaries of the district. The resolution shall state the following:
C. The district shall be governed by an initial district board appointed by the governing body of each participating entity as follows: