I just put in an expresssion of interest and addressed the 2 criteria they asked for, ie HSC and Australian residency status, with a note that full details would be available if actual applications are called for. I got a response in under 2 days.
My experience with adverts like this in other industries from both sides of the fence,is that you address ONLY what is asked.It demonstrates that you can follow instructions. Cover any more than is asked,particularly with irrelevant info, and you run the risk of being further down the list than you would like, or your application placed in the round holding file.
Just my thoughts anyway.
Cheers!