All references to “Radio Regulations” are to the Radio Regulations published by the International
Telecommunication Union (ITU). Radio Regulations are amended from time to time by the decisions embodied in the Final
Acts of World Radiocommunication Conferences held normally every two to three years. Further information on the ITU
processes as they relate to aeronautical radio system frequency use is contained in the Handbook on Radio Frequency
Spectrum Requirements for Civil Aviation including statement of approved ICAO policies