Ariz. Rev. Stat. § 38-843
E. The amount contributed by a member who was hired before July 1, 2017 pursuant to subsection C of this section is:
H. For members hired on or after July 1, 2017, the employer and member contributions are determined as follows:
1. For employers and members in the public safety employer risk pool:
2. For employers and members that are not in the public safety employer risk pool:
I. In any fiscal year, an employer's contribution to the system 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 system unless both of the following apply:
J. An employer may request that the board transfer excess assets of an employer's account that has no liabilities or beneficiaries to another account of the employer that is managed by the board. The board may authorize the transfer of assets if all of the following apply:
K. For the purposes of requesting a transfer of assets pursuant to this section, an employer must meet both of the following requirements:
M. For the purposes of calculating unfunded liability amortization payments pursuant to subsection B of this section, an employer may make a onetime election to request that the board use a closed period of not more than thirty years if the employer meets both of the following requirements: