"There is no government registration system for copyright protection in Australia. You do not need to publish your work, put a copyright notice on it, or to do anything else to be covered by copyright - the protection is free and automatic. There are no forms to fill in, and there are no fees to be paid. You do not have to lodge your work with a government agency or anwhere else.
http://www.copyright.org.au/information/registercopyright.htm/view