Ariz. Admin. Code § 12-5-518
If the rental is changed, the Commissioner shall notify the lessees and permittees at their last known address in the Commissioner's records; lessees and permittees shall be notified by the Commissioner of a change in rental, by sending a notice thereof by mail at least 30 days prior to the date upon which said rental is fixed by the Commissioner to be due, and any such notice shall be presumptively deemed to have been received on the day following which such notice is deposited in the U.S. Mail by the Commissioner.
In all other cases, the Commissioner shall mail out rental notices which rents shall be paid within 30 days or on the due date whichever is the later; the Commissioner shall assume no responsibility if the notices are not acted upon.
Ariz. Admin. Code § R12-5-518