Fog machines

It may help to point out the OP is in Victoria, and laws may be different there (er, here). I'm not sure whether there is a legal requirement, but I know at uni we put up signage whenever we used the fog machine. It may be worth checking out www.alia.com.au. EDIT: Interestingly, on the Business.gov site, you can do a search for licences. If you put in your business (ie. theatre) and postcode, it comes up with a checklist of questions which you can fill out: http://services.business.vic.gov.au/licences/prod/my-business-2 I didn't see a specific question about fog and other machinery, but it may be worth looking at anyway. Your source for handmade shadow puppets at Puppets in Melbourne