Ariz. Admin. Code § 17-5-401
In addition to the definitions in A.R.S. §§ 28-4301 and 28-4410, the following definitions apply to this Article unless otherwise specified:
"Dealer" or "motor vehicle dealer" has the same meaning as "motor vehicle dealer" in A.R.S. § 28-4301.
"Director" has the same meaning as in A.R.S. § 28-101.
"Owner" means a person who holds the legal title of a motor vehicle.
"Principal place of business" means a licensed place of business from which a wholesale motor vehicle dealer or a broker conducts business and keeps the records of the business.
"State" means the state of Arizona and all its agencies and political subdivisions, their officers and agents.
"Taxpayer identification number" means a number used for tax purposes that is assigned by the Social Security Administration or the Internal Revenue Service.
"VIN" or "Vehicle Identification Number" means the unique code, including serial number, used by an automobile manufacturer to identify a specific motor vehicle.
Ariz. Admin. Code § R17-5-401