Ariz. Rev. Stat. § 40-1128
Whenever the board of directors of an authority, by resolution, determines that the purposes for which the authority was formed have been substantially complied with, that the need for the authority has terminated, and that all obligations incurred by the authority have been fully paid, the members of the board of directors of the authority shall, upon concurrence by resolution of the governing body creating the authority, thereupon dissolve the authority in accordance with provisions of title 10. A certificate of dissolution of the authority shall be filed for record with the secretary of state. Upon dissolution all property and funds of the authority shall revert to and be the property of the creating political subdivision or subdivisions in the proportion that the population of each contracting political subdivision bears to the total population of the area of the authority.
A.R.S. § 40-1128