has continued an obsession with using the US as a model for Airspace architecture.
Gary,
Could the "obsession" with the US model perhaps be because it forms the very basis of all ICAO CNS/ATM. There is not a more thoroughly proven system.
Why does Australia always remind me of the "Little Old Lady", watching her darling offspring in the march past: " Ooohh look, Freddie's the only soldier in the Battalion in step".
We have a great record for trying to re-invent the wheel, and it ends up with corners.
Tootle pip!!