For a 5th category station, the operator uses the call sign related to his/her operator’s certificate or the authorisation of the operated station.
The call sign is transmitted following a method which is adapted to the type of emission. If this is not possible, the call sign is transmitted vocally or in telegraphy. In telephony mode, the call sign is pronounced clearly and, if necessary, spelled using the international alphabet. In telegraphy mode, the call sign is communicated in Morse code at the transmission speed used during the contact.
The call sign is transmitted at least once at the beginning and the end of each emission. When the emission is made of several short messages, the series of emissions is considered as one emission. In the context of an emission or a series of emissions, the call sign is repeated at least every five minutes.