(2) In the case of an aerodrome (other than a Government aerodrome) in respect of which there is equipment for providing holding aid, let-down aid or approach aid by radio or radar the person in charge of the aerodrome shall; (a) inform the Authority in advance of the periods during and times at which any such equipment is to be in operation for the purpose of providing such aid as is specified by the person; and (b) during any period and at such times as are notified, cause an air traffic control service to be provided for any aircraft which is flying in, or in the vicinity of, the aerodrome traffic zone whether or not it is flying by visual reference to the surface. (3) The Authority may direct that there shall be provided in respect of any aerodrome (other than a Government aerodrome) such air traffic control service, aerodrome flight information service or a means of two-way radio communication as the Authority considers appropriate in respect thereof. (4) The Authority may specify in the direction the periods during and the times at which such service or such means shall be provided and the person in charge of the aerodrome shall cause such a service or such means to be provided in accordance with the direction. (5) Obligations to cause an air traffic control service to be provided arising under sub-regulation (2) or (3) are without prejudice to each other.