Ariz. Rev. Stat. § 36-2232
A. The director shall adopt rules to regulate the operation of ambulances and ambulance services in this state. Each rule shall identify all sections and subsections of this chapter under which the rule was formulated. The rules shall provide for the department to do the following:
C. An ambulance service shall:
D. At any time, the director or the director's agents may:
H. The department shall incorporate all of the following factors when calculating the proposed mileage rate: