NDP deputy public safety critic Don Davies agrees there should be more transparency and more opportunity to appeal.
"Trusted travellers who have had their NEXUS cards revoked need to know that they were revoked for a good reason," he said. "And I think they are owed an explanation as to why their passes were revoked, and there needs to be some sort of timely and fair process for challenging that where there may be a valid reason for thinking that the revocation wasn't valid."