G'day mic310,
From the Oz AIP
Regards,
BH.
8. WAKE TURBULENCE SEPARATION STANDARDS
8.1 Categories
8.1.1 For the purpose of wake turbulence separation, aircraft are divided
into the following weight categories:
a. SUPER (J) - A380 Aircraft;
b. HEAVY (H) - All other aircraft types of 136,000 KG maximum
take-off weight or more;
c. MEDIUM (M) - Aircraft types of less than 136,000KG maximum
take‐off weight but more than 7,000KG maximum take‐off
weight;
d. LIGHT (L) - Aircraft types of 7,000KG maximum take‐off
weight or less.
Note: B757 and H47 (Chinook) are categorised Heavy (H) when
the following aircraft is categorised either Medium (M) or Light (L)
and categorised Medium(M) when the preceding aircraft is categorised
Heavy (H).