If you are an ordinary Aussie (or a partner of a stockperson missing after the sinking of a live export ship) coming into Oz from overseas, you have to isolate in a hotel for 2 weeks, but not, it seems, if one is off a live ex ship. The stockperson and the veterinarian from the Al Messilah were allowed to leave the ship to self isolate. The West Australian reported that the stockperson duly drove themself home in their own car to do just that. The vet however was allowed to go from the Port to the Airport and hop on a plane to Sydney....Federal rules apparently state that a 2 weeks ship's journey is fine if no Covid onboard.....(oops.. there was). Interestingly, the Editorial states that the WA rules differ in that that 72h of self-isolation off ships required regardless of the 14 day Federal rule....so clearly Federal trumps State in the case of live ex! Fortunately, both stock personnel have tested negative but some serious questions here.
See also: https://www.abc.net.au/news/2020-10-20/two-australians-allowed-to-disembark-covid-ship-fremantle/12785898
See also: https://thewest.com.au/news/coronavirus/coronavirus-two-australian-al-messilah-crew-members-allowed-to-leave-covid-ship-before-outbreak-known-ng-b881697901z