aerodrome traffic zone

"aerodrome traffic zone" means, in relation to any aerodrome, the airspace extending from the aerodrome to a height of 600 metres above its level and within a distance of 1.5 nautical miles of its boundaries except any part of that airspace which is within the aerodrome traffic zone of another aerodrome which, for the purposes of these Regulations, is notified as being the controlling aerodrome;
PU(A) 139/1996 - CIVIL AVIATION REGULATIONS 1996
2. Interpretation.