A.R.S. § 26-310

During a state of war emergency or a state of emergency, any person holding any license, certificate or other permit issued by any state evidencing the meeting of the qualifications of such state for professional, mechanical or other skills may render aid involving such skill to meet the emergency as fully as if such license, certificate or other permit had been issued in this state, if any substantially similar license, certificate or other permit is issued in this state to applicants possessing the same professional, mechanical or other skills.