Division 9 If the CAA converts frequency assignments to 8,33 kHz channel spacing in any part of the airspace under the responsibility of the United Kingdom it must:F1

ensure that operators of aircraft operating in such airspace are informed that these aircraft must be equipped with radios having the 8,33 kHz channel spacing capability;

ensure that appropriate training is provided to flight crew members that use 25 kHz radios in airspace where the carriage of radios having the 8,33 kHz channel spacing capability is required, as specified in Article 2(5);

perform a local safety assessment prior to the conversion that takes into account all the traffic expected to cross that airspace and the potential issues arising from the voice communication system in operation in all surrounding airspace.