Phraseology on first contact - calling departures
Several questions on the required or desired phraseology.
ICAO. Doc4444 - 4.11.3 is the guiding document.
Frequency Change
designation of the station being called;
call sign (and “Heavy”);
level, including passing and cleared level if not maintaining;
speed (if assigned by ATC);
additional elements required by the regional authority. (If HK CAD has approved the inclusion of SSR code when entering from China – then that is clearly a regional authority element).
The Hong Kong AIP supersedes ICAO in HK for frequency change and ENR 1.1 2. requires:
callsign,
level,
assigned level.
CALLING DEPARTURES
From the detail above, on first contact with Departures, the SID identifier is not required.