There are a number of reasons that situation could occur.
Again, under both the current and the new act, our responsibility in approving pesticides in Canada is that we've addressed human health from a number of different perspectives. We have to look at occupational health and safety. We have to be reasonably certain that there will not be harm to the farmers or workers who are using the products, or to bystanders, or of course, the people who might be exposed through consumption of food or water.
We also have to look at the environment. If we have a concern that it's inappropriate to approve the pesticide because of environmental effects, we'll say no. We can then say that the U.S. has approved a product that we might have said no to because of concerns about occupational health or about the environment, but that it doesn't present a food safety concern. We might have set an import MRL under those conditions.
The other thing is this general default that I mentioned, which we have already proposed revoking. If they use a product that isn't approved and the residue on the product is below 0.1 parts per million, at the moment it can come in legally--any residue can come in if it's below the 0.1 parts per million.