Been in TAS and SA in the last few weeks. Both have respectable contact tracing systems. You cant get out of the arrival hall in Hobart without "checking in", SA requires pre approval from Police and a border check. Both are serious about QR codes everywhere to the point where retailers wont serve you unless you have checked in.
Victoria? La! La! La! No border checks and a broken and unenforced QR system. Dan Andrews is an idiot.
Suggestion now is that seven days won't be enough.