Ariz. Rev. Stat. § 15-121
B. Upon election by an employee to participate through salary reduction contributions if permitted under federal law or by election of the governing board to make nonelective employer contributions, the governing board of a school district, the county school superintendent, the community college district governing board, the Arizona board of regents or other governing body or employer of the employee shall:
D. State, county, district or other public monies shall not be used in the purchase of any annuity or payment of any deferred compensation authorized by this article, except for monies authorized for the following purposes: