Ariz. Rev. Stat. § 11-862
A. Any code adopted pursuant to this article shall contain a provision for an advisory board consisting of at least five members in order to determine the suitability of alternative materials and construction and to permit interpretations of the provisions of such code. The advisory board shall consist of at least five but not more than seven members and shall include at least members from the following categories, to the extent the persons meeting the qualifications are available within the county and are residents of such county: