http://www.windsurfing.org/files/info/AWA_Cull_Names_2012.pdf
If you have not been a member of a state organisation or affiliated club for the past 2 years but have had an AUS sail number in the past those sail numbers are being reissued. The link above shows the numbers available in white.
If you want to retain a number on the list you need to renew your membership asap.
If you are a current member and you wish to transfer to an available number you need to apply to This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
Those numbers shaded in red will become available on 1/7/13 if the person has not renewed by then.
Full details
http://www.windsurfing.org/sailnumber_cull_2012.htm