The U.S. did not enact any legislation. They're using something called title 19, which is about customs. That's how the officers in Windsor get the authority to carry a firearm into the U.S.
But the one point I want to make is that we engaged with Public Safety in consultations back in 2008. One of the most important things to come out of that was the fact that those consulted—the Attorneys General, the lawyers, and others—all wanted the Americans to be subject to our law—not only to enforce our law but to be subject to it as well.