Following Gaunty's link led me to this info on another page:
You have a photo-licence, including AVID, issued after 10 March 2005
These Photo IDs include the words ''Aviation Identification". No action required unless you wish to apply for an ASIC. A new security check will not be required but your security check report will be reassessed. The ASIC will be issued for a two year period from the date the last background check was conducted. You can apply to CASA for an ASIC using the application form 639.
http://www.casa.gov.au/fcl/licence/index.htm
Does this shed some light on the reason for the varying validity dates others have reported?
Still don't have mine - tried ringing CLARC but get a recorded message sayng "All lines are busy, please try later.. click...."
Woomera I don't think Perth CASA office have been trying to call me - no hang-ups or missed calls or messages on either answering machine or mobile.