The Australian Government has regulations around distilling and the ownership of stills, particularly those over 5L.

It’s not illegal to own a still in Australia but you do need permission from the ATO, it’s completely free and fairly easy to do online here It’s only when you are distilling spirits that you need to pay tax on the spirits. Please follow the link to know more about excise https://www.ato.gov.au/law/view/document?docid=SAV/ALCOHOL/00012