Core phraseology positively reinforcing that the lateral, vertical and speed requirements embedded in a SID or STAR continue to apply, unless explicitly cancelled or amended;
Additional phraseology that enables ATCO to cancel any level or speed restrictions; and
Harmonized phraseology to bypass waypoints or amend the lateral profile of SID or STAR.
And what doesn't change?
The requirement for the highest standard of discipline to be applied to all communications;
The need to comply with limits associated with airspace classifications (ICAO Annex 11 — Air Traffic Services Chapter 2 and Appendix 4);
Requirements related to transmitting QNH altimeter settings (PANS-ATM 4.10.4.5 refers);
The terrain clearance responsibilities prescribed in ICAO Doc 4444 (PANS-ATM) 8.6.5.2;
In unusual or unforeseen circumstances, where using standard phraseology may not be adequate or possible, controllers and pilots are expected to use clear and concise plain language.