Stationair, Avalon and the other airports you mention should be subject to the proven FAA Class D establishment and dis-establishment formula. This takes into account traffic, pax and other issues to come up with an objective, scientific result.
CASA no longer uses this formula as it can't easily be manipulated to appease stakeholders.
Their Avalon study utilises subjective "guesses" to come up with the result they want- ie one that doesn't offend the powerful.
Last edited by Dick Smith; 31st Jan 2009 at 20:05.