Ariz. Rev. Stat. § 42-6010
D. This section does not apply with respect to:
G. For the purposes of this section:
2. "Retail business facility" means a store, warehouse or other improvement to real estate where at least one-half of the business conducted on the premises consists of retail sales of tangible personal property to the ultimate consumer, measured by either the number of employees assigned to retail sales or the square footage of the facility used for retail sales. For the purposes of this paragraph, retail sales do not include: