The ((WP Australia)) project banner template should be added (not subst:ed) to the talk page of every article within the scope of the project. While the template does not require any additional parameters, it has a number of optional ones that add various extra features to the banner. The full syntax is as follows:
((WP Australia <!-- WikiProject topic specific tags --> |sports= |afl= |aleague= |baseball= |football= |nbl= |nrl= |motorsport= ))
WikiProject specific parameters Australian sports
To avoid needlessly cluttering up talk pages, it is usually appropriate to remove any unused parameters from the template.