I found details of a letter from Michael Haines of Civil Air to Minister Anthony Albanese dated 30 November 2007, which states:
"The current system of airspace promulgation is an ill defined half way system. The main problem from an Air Traffic Control perspective is that the service to be provided in some classes of airspace are ill or under defined. Air Traffic Controller and Pilots must be clearly aware of the service that is provided in a particular class of airspace."
I wonder if Civil Air has changed its position?