Ariz. Rev. Stat. § 38-890 – Pensions; commencement and duration

A. A normal retirement pension, an accidental disability pension, a total and permanent disability pension or an ordinary disability pension commences on the first day of the calendar month next following the member's date of retirement. A survivor pension commences on the first day of the calendar month next following the month in which the death causing payment of the pension occurs.
B. Termination of payment of a pension occurs at the end of the calendar month in which the event causing the termination occurred. The payment shall be made for the full month of termination.
C. A change in the amount of a pension occurs on the first day of the calendar month next following the date of the event causing the change.
D. The plan shall make payments pursuant to section 401(a)(9) of the internal revenue code and the regulations that are issued under that section. Notwithstanding any other provision of the plan, beginning January 1, 1987 payment of benefits to a member shall commence not later than April 1 of the calendar year following the later of:
1. 1. The calendar year in which the member attains seventy-two years of age.
2. 2. The date the member terminates employment.