Hi 2G.
CASA publishes all the relevant rules here:
http://www.casa.gov.au/rules/index.htm
Read sections 9, 10 and 11 of the
Civil Aviation Act 1988, twice, and you'll have the answer.
If you're really interested and have the time, the Convention and all of the subsequent amendments are Schedules to the
Air Navigation Act 1920, copy here:
http://scaleplus.law.gov.au/html/pasteact/0/82/top.htm
Good luck!
(Over to you, Gaunty)