The Australian government has a policy and practice of detaining in immigration detention facilities non-citizens not holding a valid visa, suspected of visa violations, illegal entry or unauthorised arrival, and those subject to deportation and removal in immigration detention until a decision is made by the immigration authorities to grant a visa and release them into the community, or to repatriate them to their country of origin/passport. Persons in immigration detention may at any time opt to voluntarily leave Australia for their country of origin, or they may be deported or given a bridging or temporary visa.