Travelling to US from Canada
Just off the phone with CATSA
Underage minors are never exempt from random selection.
Should they be selected, an underage minor can choose to opt-out of the NoS
Should said minor opt-out, they will be subjected to the same pat down and process as any adult would be
Adults are permitted to accompany their minor children at all times
ps - I was told that as part of the enhanced process, CATSA has upped the "random selection" to 50%. So, you now have a 50/50 chance of random NoS or opt-out groping.