If an IFR aircraft is assigned a sight and follow with a preceding Medium or Heavy it is the PIC who is responsible for Wake Turb.
As top Drop states no Wake turb provided to VFR arrivals. ie ABC (C150)on downwind report sighting the B767 2 mile final 'ABC Traffic sighted' 'ABC turn base to follow caution wake turbulence'.
AIP Sup out this week I am told as it did make it in time for the AIP publication
2 flying schools that I have talked to who operate in Class C airspace were unaware of the pending changes!!!
Yet CASA are claiming the industry has been appropriately briefed......