Released by the AUSTRALIAN Department of Home Affairs
The Australian Department of Home Affairs advises eligible clients to apply for an Electronic Travel Authority )ETA) two weeks before intended travel.
While most ETAs are decide on application, ETAs required further assessment by an Australian visa office. This does not necessarily mean the client will not receive an ETA. Travel agents and check-in staff encourage their clients to aplly early for their ETA to avoid disruption to travel plans.
For more information please see the website : https://www.homeaffairs.gov.au/trav/visa-1/601-#tab-content-1