The application process will be via a "largely automated IT system," with approval granted "within minutes," for an estimated 95% of applicants, according to a new memo issued by the EU. The maximum time needed for approval could be up to a month in "very exceptional cases." Anyone whose application is denied will have the right to appeal.
ETIAS authorization be valid for an unlimited number of entries over three years. However, holders must abide by immigration and overstay rules. Currently, third-party nationals cannot stay more than 90 days in the bloc in its entirety, for every 180 day period.
The cost: €7 ($7.35) for those aged between 18 and 70. It's not yet clear if others will have a reduced rate or will be able to apply for free. In comparison, the US charges $21 for an ESTA authorization.
The start date for applications has not yet been announced.
https://www.cnn.com/travel/article/etias-eu-visa-waiver/index.html#:~:text=The EU has announced the,United States' scheme%2C ESTA.