One of the key challenges with that is around the handling of goods that come across the border, because not everybody who handles goods that come across the border—and there are many, many, many thousands of people in that category—is going to be at risk, but there are still some who could be at risk. So making sure that we're narrowing that down so that we're dealing with the risk but not capturing people who we hadn't intended to capture has been one of the challenges.