It's actually defined in the act, Senator Cameron. I am advised that if there are to be further sites, then that would require another bill to come before the parliament. It is protecting the parliamentary oversight, but it's a higher protection, if I can put it that way. Rather than being done by delegated legislation, where it would be a disallowable instrument, this is a situation where we would have to come back to the parliament, because it's actually legislated. We would have to come back to parliament if we wanted to go to further sites. Of course, that affords parliament the opportunity of scrutiny.