ELECTRONIC TRAVEL AUTHORITY
This visa lets you visit Australia:
1. to visit or for business visitor purposes
2. as many times as you want, for up to a year
3. and stay up to three months for each visit.
Only certain passport holders can apply for this visa online. You may need to use a travel agent to apply for this visa. An ETA is an electronically stored authority for travel to Australia. You must be outside Australia when you apply and when the ETA is decided.
WHAT AN ELECTRONIC TRAVEL AUTHORITY LETS YOU DO
Your ETA lets you enter Australia for up to three months at a time as a tourist or for business visitor purposes. You are also permitted to study in Australia for up to 3 months in some circumstances.