Anybody bother to read the
AIP these days, anyone? Try reading section ENR 1.4 Para 9.2.7:
For aircraft in the heavy wake turbulence category, the word "HEAVY" shall be included immediately after the aircraft callsign in the initial radiotelephony contact between such aircraft and the aerodrome control tower or the approach control unit.
This is a new requirement that was introduced by
AIR SERVICES AUSTRALIA in AIP amendment 45 dated 24 Nov 05.