GM1 130. Air traffic control clearance or ATC clearance

GENERAL Throughout the text, the term ‘air traffic control clearance’ is frequently abbreviated to ‘clearance’ when used in appropriate contexts. In this context, the abbreviated term ‘clearance’ may be prefixed by the words ‘taxi’, ‘take-off’, ‘departure’, ‘en-route’, ‘approach’ or ‘landing’ to indicate the particular portion of flight to which the ATC clearance relates.