just got this from regent
Dear Valued Guest and Travel Partner,
We have an important update for you regarding your upcoming cruise and the required Australian Electronic Travel Authorization (ETA).
The Australian government has changed their process for issuing ETAs. At this time, they are only issued through the government’s Department of Home Affairs’ Smart Phone Australian ETA app. You can download the Australian ETA app for free from the Apple Store or Google Play Store (Andriod). A step by step guide can be found here.
Unfortunately, Regent Seven Seas Cruises and third-party visa service providers are currently unable to secure the ETA on behalf of guests.
If you have pre-purchased the Australian ETA through Regent, we will be removing the extension from your reservation and issuing a refund, if applicable, shortly.
It is imperative that all guests obtain the necessary documents in advance of sailing. Failure to produce the correct documentation at embarkation will result in denial of boarding. Please ensure your passport is valid at least 6 months after your return date.
Citizens and residents of other countries should check with their local consulate for individual visa requirements. VisaCentral has also provided us with the following link to assist our international guests with visa requirements: http://rssc.visacentral.com.
A list of Australian ETA eligible nationalities can be found here.
Thank you for your attention to this matter.