For some reason, concerned Aussies seem to be a pretty common thing around here. I would suggest looking at
this search for similar topics, read the replies there, and see if that answers your question. I really can't comment on Australian law or third-party distributors, but I can't recall hearing any horror stories.
Again though, don't take my word for it, and other users are more than welcome to chime in if they have any similar experiences to share.