1. Charges are payable, in accordance with this Schedule, by the registered owners of aircraft registered under the Air Navigation Regulations, not being persons who are the holders of airline licences (including international airline licences), under those Regulations.

2. A charge is payable under this Schedule in respect of an aircraft registered under the Air Navigation Regulations on or after the first day of July, One thousand nine hundred and fifty-two.

3. The amount of the charge payable under this Schedule is

(a) in respect of a private aircraft, as defined by the Air Navigation Regulations-twice the unit charge for that aircraft in respect of each week or part of a week comprised in the period of registration of the aircraft;

(b) in respect of an aerial work aircraft, as so defined-four times the unit charge for that aircraft in respect of each week or part of a week comprised in the period of registration of the aircraft; and

(c) in respect of a charter aircraft, as so defined-six times the unit charge for that aircraft in respect of each week or part of a week comprised in the period of registration of the aircraft.