And it has been that way for months now. Both Queensland and WA have had that requirement of crew from Sydney since at least June or July. There was a respite for just over a week in both from about December 7 but it’s back on again now. I suspect Victoria will implement it soon if it hasn’t done so already.
Without going into specifics about where crew stay, in BNE and PER the normal crew accommodation also happened to be quarantine hotels.