Originally Posted by
FAIPDXFlyer
I have never been through YUL, so I'll take your word on that front. As to the domestic travel, NoS are in use at YOW (though only one as of a few weeks ago) and YYZ. I'll check YVR when I transfer between flights in a few weeks
They have NoS at yul domestic security. I thought they were only used as a secondary device. But, some have said that they were randomly selected to use the NoS at domestic.