61 Pa. Code § 58.8
(a) Definitions. The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
(iii) Providing flight instruction.
Common carrier—An air carrier who has obtained a Certificate of Convenience from the Civil Aeronautics Board, or its successor, for the purpose of transporting persons or property.
Fair rental value—The rental price which the owner, lessor or other operator of an aircraft normally charges for the rental of the aircraft; or the rental price which would be charged on the open market for the rental of a similar aircraft for a similar period of time under similar circumstances. When the fair rental value is unknown, the Department will recognize 2.0% of the purchase price as a monthly fair rental value of an aircraft provided the purchase price represents the fair market value of such aircraft.
Flight instruction—Instruction provided in connection with obtaining a student license, private rating, commercial rating, instrument rating, instructor rating, transport rating, jet rating, instrument instructor rating or any rating or course approved by the Federal Aviation Administration.
Prevailing market price—The amount which would be charged for an aircraft on the open market at the time and place of transfer; or the amount which would be charged on the open market for a similar aircraft under similar circumstances.
Purchase price—The total value paid or delivered, or promised to be paid or delivered, whether it be money or otherwise in the complete performance of a sale or purchase including delivery charges paid to the seller. The following items may be excluded from purchase price provided they are separately stated:
(ii) Reasonable interest and finance charges in connection with an installment sale.
Rental or lease—The transfer of possession or custody of an aircraft, including an aircraft provided or used in connection with flight instruction, but the term does not include the service of a common carrier.
Rental or lease payment—The total value paid or delivered, or promised to be paid or delivered, whether it be money or otherwise, for any period under a rental or lease arrangement:
(ii) Excluding separately stated charges for aircraft fuel sold by the lessor or purchased by the lessee and reimbursed by the lessor. To qualify for exemption, the charges for fuel shall:
(iii) Excluding separately stated charges for instructor fees if such fees are identified.
Resident—
(iii) An association, fiduciary, partnership or other entity domiciled in this Commonwealth, or authorized to do business or doing business within this Commonwealth, or maintaining a place of business within this Commonwealth.
Use—The exercise of any right or power incidental to the ownership, custody or possession of tangible personal property including but not limited to the transportation, storage and consumption.
Casual sales—A sale of an aircraft by a person not engaged in the business of selling aircraft.
Commercial aircraft operator—A person, excluding scheduled airlines, who is engaged in any of the following activities as a business for compensation:
This section cited in 61 Pa. Code § 33.2 (relating to scope); and 61 Pa. Code § 60.16 (relating to Local Sales, Use and Hotel Occupancy Tax).