For purposes of valuation and taxation of airline companies under A.R.S. Title 42, Chapter 14, Article 6, the following definitions apply:
1. "Flight property" as defined in A.R.S. § 42-14251 includes both owned and leased aircraft.
2. "Permanently removed from operations" means aircraft that are entirely terminated from regularly scheduled operations by an airline company.
3. "Regularly scheduled" means the operation of aircraft that completed at least 120 landings or takeoffs within Arizona during the preceding calendar year, according to a plan of dates or times for landings and takeoffs, regardless of whether the plan is published for customer use.
Ariz. Admin. Code § R15-4-302