Ariz. Admin. Code § 15-2D-804
Example: The taxpayer, with inventory in State A, sells $100,000 of its products to a purchaser with branch stores in several states, including this state. The order for the purchase is placed by the purchaser's central purchasing department, located in State B. The taxpayer ships $25,000 of the purchase order directly to purchaser's branch store in this state. The branch store in this state is the "purchaser within this state" with respect to $25,000 of the taxpayer's sales.
Example: The taxpayer makes a sale to a purchaser who maintains a central warehouse in this state at which all merchandise purchases are received. The purchaser reships the goods to its branch stores in other states for sale. All of the taxpayer's products shipped to the purchaser's warehouse in this state constitute property delivered or shipped to a purchaser within this state.
Example: A taxpayer in this state sells merchandise to a purchaser in State A. The taxpayer directs the manufacturer or supplier of the merchandise in State B to ship the merchandise to the purchaser's customer in this state according to purchaser's instructions. The sale by the taxpayer is "in this state."
Example: The taxpayer, a produce grower in State A, begins shipment of perishable produce to the purchaser's place of business in State B. While en route, the produce is diverted to the purchaser's place of business in this state in which the taxpayer is subject to tax. The sale by the taxpayer is in this state.
Ariz. Admin. Code § R15-2D-804