Ariz. Admin. Code § 15-5-1601
The following definitions apply for purposes of the rules in this Article, unless the context requires otherwise or unless otherwise defined.
1. "Agricultural property" means land or structures which are used for the purposes of growing crops or raising animals including agronomy, horticulture, viticulture, or animal husbandry.
2. "Economic unit of agricultural property" means agricultural property which is rented to the same lessee under one lease or rental agreement but may include more than one parcel or location which is functionally integrated.
3. "Real property used for commercial purposes" means land or structures, including parking lots but not including agricultural property or land or structures used for residential purposes.
4. "Rental" means renting or leasing
5. "Unit" means a single real property location rented or leased to a single tenant under one lease or rental agreement.
Ariz. Admin. Code § R15-5-1601