Ariz. Rev. Stat. § 38-810
G. An elected official who became a member of the plan before July 20, 2011 shall contribute seven percent of the member's gross salary pursuant to subsection A of this section. The amount contributed pursuant to subsection A of this section by an elected official who became a member of the plan on or after July 20, 2011 is:
J. In any fiscal year, an employer's contribution to the plan in combination with member contributions may not be less than the actuarially determined normal cost for that fiscal year. The board may not suspend contributions to the plan unless both of the following apply: