Ariz. Rev. Stat. § 42-5063
A. The utilities classification is comprised of the business of:
B. The utilities classification does not include:
6. The leasing or renting of space to make attachments to utility poles as follows:
C. The tax base for the utilities classification is the gross proceeds of sales or gross income derived from the business, but the following shall be deducted from the tax base:
3. Gross proceeds of sales or gross income derived from sales to:
6. Gross proceeds of sales or gross income derived from sales of electricity, natural gas or liquefied petroleum gas to a qualified manufacturing or smelting business. A utility that claims this deduction shall report each month, on a form prescribed by the department, the name and address of each qualified manufacturing or smelting business for which this deduction is taken. This paragraph applies to gas transportation services. For the purposes of this paragraph:
(c) "Qualified manufacturing or smelting business" means one of the following:
D. For the purposes of this section: