Ariz. Rev. Stat. § 40-842
When an employee files a complaint with the commission charging violation of regulations of the commission, or the commission upon its own initiative issues a complaint, the person complained of shall be served with a copy thereof and shall, within twenty days, file a written answer with the commission. Within ten days after the answer is filed the commission shall set a date for hearing the complaint at a place convenient to both the complainant and the person complained of. The commission may, in its discretion, permit any interested person or organization to intervene. A party to the hearing may appear and be heard in person or by his representative, and may examine or cross-examine witnesses or present other evidence. On motion of a party, the commission may allow a continuance of not to exceed thirty days.
A.R.S. § 40-842