1. (a) "Ground time" for air carriers means all time spent on the ground while loading and unloading passengers, freight, mail, or operating supplies, or during refueling operations, and does not include periods when the aircraft is

   1. (1) not being loaded or unloaded;
   2. (2) not in service; or
   3. (3) idle due to strikes, repairs and maintenance, downshifts, or seasonal reduction of service.
2. (b) For the purposes of computing "ground time," it is presumed that there is one hour of ground time for each departure unless the taxpayer provides evidence acceptable to the department which rebuts that presumption.
3. (c) The "value" of owned real and tangible personal property means its initial federal tax basis, plus the cost of capital improvements to that property. (See AS 43.19.010, Article IV.11, and 15 AAC 19.180.
4. (d) "Average value" of property means the amount determined by averaging the values at the beginning and ending of the income year; however, the commissioner will, in his discretion, require the averaging of monthly values during the income year if that averaging is necessary to reflect properly the average value of the airline's property. (See AS 43.19.010, Article IV.12 and 15 AAC 19.201.
5. (e) The "value" of rented real and tangible personal property means the product of eight times the net annual rental rate. (See AS 43.19.010, Article IV.11, and 15 AAC 19.191.
6. (f) "Net annual rental rate" means the annual rental rate paid by the taxpayer less any annual rental rate received by the taxpayer from subrentals.
7. (g) "Property used during the income year" includes property which is available for use in the taxpayer's trade or business during the income year.
8. (h) "Aircraft ready for flight" means aircraft owned or acquired through rental or lease (but not interchange) which are in the possession of the taxpayer and are available for use on the taxpayer's routes.

(Eff. 3/31/82, Register 81)