“Authors, creators and copyright owners have the right to protect their work against possible infringement and prevent others from using their work without their permission.
In Australia, copyright material is subject to copyright as soon as it is created. The author or creator does not have to do anything to gain copyright and protection for their work. You do not need to include the copyright symbol – © – on your work (although it is recommended) or register your work. For information on what your rights are, see Rights of Copyright Owners.
There are several practical steps that you can take to protect and effectively manage your rights…”
Read more via Protecting Your Work : Copyright Office.