Refugees detained on Manus Island and Nauru considered to be of "adverse character" will be sent to Christmas Island if they try to come to Australia under new medical evacuation laws.
The Australian government has identified 57 individuals held in offshore detention that it alleges are accused of crimes including murder, child sexual assault, drug trafficking and terror activity.
The government has budgeted $US1 billion over four years to reopen the detention centre on Christmas Island, an Australian territory in the Indian Ocean.
Nobody has been brought to Australia under the new laws, which came into effect on Saturday.
Refugee advocates expect a handful of applications in the coming fortnight and argue there's no need for Christmas Island to be reopened.
Under the current government, about 900 patients and family members have been evacuated to Australia from offshore detention for health reasons.