Duh, and you might be exact on that.. might not be able to get back to the US. We generally carried one even when not required just in case... never had to produce it though.

Ours are unmarked even after flying in and out of BC a few times years ago to visit relatives

We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....