$ (d) the Botswana Railways Corporation; and (e) such other person as the Authority may by regulation exempt. (4) A radio licence issued in terms of this section shall specify— (a) the radio frequency allocated to the applicant; (b) the type and characteristics of the antenna and radio transmitter to be used; (c) the geographical area in which any mobile radio transmitter, where applicable, may be used; (d) the place at which the antenna or fixed radio transmitter may be located; H