Once users have an approved EVUS registration or enrollment, they can update most of their information except for Passport number and Passport issuing country. After the EVUS enrollment has been submitted, users can update and change the following information:
A Successful EVUS enrollment is generally valid for multiple trips over a period of two years (starting the date that you enrolled) or until your Passport expires or your Visa expires, whichever comes first. This means that as long as your EVUS is Successful for travel, you do not have to enroll again during the validity period. It is possible for a Successful EVUS enrollment to change status to Unsuccessful. This means your EVUS is no longer valid and you are not eligible to travel with your current visitor Visa. The EVUS Successful Enrollment screen displays your EVUS enrollment expiration date.
Your EVUS must be valid at the time of arrival only. If your EVUS expires after you are admitted and while you are present in the United States it will not affect your departure. Receiving a Successful EVUS enrollment does not mean you may stay in the U.S. for two years. It only allows you to travel to the U.S. under the terms of your visitor Visa, which generally allows you to stay in the U.S. approximately for 6 months or less.
If you obtain a new Passport or change your name, gender or country of citizenship, you will be required to enroll again in EVUS. This is also required if one of your answers to any of the EVUS questions changes.