Valid passport required by all. All other nationals must obtain a transit visa before travel, irrespective of the period of transit in Australia.
Transit visas are free of charge.
An ETA is invisible and therefore will not show up in your passport. Please note, the Australian High Commission, London, no longer offers an automatic ETA service. Free of charge. Some travel agents and airlines issuing ETAs also charge a processing fee. Long-term Business Visit ETAs are valid for the life of the passport, and permit multiple entries for a stay of up to 3 months for each visit.