Ariz. Rev. Stat. § 28-6392
B. The jurisdiction receiving the revenues may use the revenues only for street and highway purposes or for transportation projects included in the regional transportation plan of the county as prepared by the county regional planning agency. If the auditor general reports to the state treasurer after conducting a performance audit pursuant to section 41-1279.03, subsection A, paragraph 6 that a jurisdiction has not used revenues as provided in this subsection: