Prime Minister Scott Morrison announced the decision on Friday afternoon, saying the arrangement would ensure returned travellers complied with the self-quarantine requirements and limit the risk of them passing on COVID-19 to family members.
"If their home is in South Australia or in Perth or in Tasmania and they have arrived in Melbourne, they will be quarantining in Melbourne. If it's in Sydney, it will be if Sydney. If it's Brisbane, and so on," Mr Morrison said.