I know Michael however over christmas/new year there was staff shortages there with alot of the atc taking holiday breaks and this CAGRO system was set up. Irrespective of it being RAAF or ASA- there is clearly still a requirement for ATC in Australia with large airspace closures.
See this regarding specific situation at Williamtown
http://www.theherald.com.au/news/loc...t/1509009.aspx
General airspace closures and other info on ATC unions website Civil Air
http://www.civilair.asn.au/joomla/