Nexus program rules state:
At all times, a member
must carry his/her membership card, as well as
all required travel and identification documents, including:
- personal ID;
- immigration or citizenship documents; and
- any other documentation that is required to enter Canada (e.g.: a letter of consent from the parent/legal guardian not traveling with the child(ren).
Eligibility following violation:
- May be eligible to (re)apply after one year has elapsed since the violation.
NOTE: The one-year period begins from the date that the violation occurred.
https://www.cbsa-asfc.gc.ca/prog/nexus/term-eng.html