In a way, it's a challenge in Canadian-American relations, rather than a challenge for strictly Canadian border enforcement provisions. I think this is particularly true with regard to the legalization of marijuana. How that would be treated across the border is an issue that remains to be seen.
Again, I don't see in Bill C-21 measures that are going to make the export of goods or the movement of people more difficult. It's a question of how exit is going to be handled by the United States, particularly across the land border.
Obviously, we need to work very closely with the United States and try to convince them of the Canadian interests in this regard, but ultimately that will depend on their approaches.