The ATO Excise division have a lot of information that you will have to know and comply with.
If you start there and follow all the links (should keep you entertained for a couple of days). There was a guide to starting a Micro on the ATO website but I cant find it now, there are also several businesses that offer courses in opening a brewery i.e. http://www.beverageandbrewingconsulting.com/starting-a-microbrewery-course
But like I said try the ATO first, even ring them and ask what they have available. ATO
Mark
If you start there and follow all the links (should keep you entertained for a couple of days). There was a guide to starting a Micro on the ATO website but I cant find it now, there are also several businesses that offer courses in opening a brewery i.e. http://www.beverageandbrewingconsulting.com/starting-a-microbrewery-course
But like I said try the ATO first, even ring them and ask what they have available. ATO
Mark