Originally Posted by
Traffic_Is_Er_Was
Then you don't need E.
Unfortunately, you don't turn airspace classification on and off with the weather.
If it's E, you're getting separated whether in IMC or not. My point is that there is a lot less aircraft in IMC in Aus than in the US.
It's not a change of airspace classification but a change to procedures, a bit like flying a GLS approach vs flying a visual approach, flying an independent visual approach to Sydney vs flying a visual approach, flying PRM approach to Sydney vs flying an ILS approach. They are different procedures in the same airspace classification and are WX / pilot / equipment dependent. Pilot and ATC procedures change to the circumstance.
And, yes, I understood your point regarding the WX in AUS being better than the WX IN USA.