Again, with these types of things I think people will always try to do things that are close to the line. Just looking at the amount coming in and the amount going out may not be sufficient because there may be ways of altering those goods in the meantime so that what goes back out looks the same as what came in. There are those types of things that could happen.
I think that they need to look at the data that's available to them, and they need to try to use that to identify ways that people might be getting around this system. I think that they need to be a bit creative in trying to think about how they can use the data to identify signs that people are not respecting the system.