Ariz. Admin. Code § R16-4-112
The Board shall allow the withdrawal of an appeal at any time prior to the conclusion of the hearing if there is no objection by a party or by the Board to the request for withdrawal. If there is an objection, the Board may in its discretion allow the withdrawal.
Emergency rule adopted effective February 1, 1996, in effect for a maximum of 180 days (Supp. 96-1).