No Further Requirements,
You state:
“it is that restricted airspace is Class C and therefore separation as per the rule book apply.”
The point I have been making for over a decade. The Australian procedures in Class C are based on something set in 1950 – probably before radar even existed.
In North America, not just the USA but also in Canada, the procedures in Class C are quite different to what we use here. Of course, it will be claimed that ours are “ICAO”. In that case, the US and Canada provide a different service to that required by ICAO. I once heard that the FAA was quite proud to have more notified differences to ICAO than virtually any other country in the world. Many aviators in the USA see ICAO as some form of system designed for third world countries such as Africa and not an organisation that should be followed where you need to allocate your safety dollars most effectively.