That is a good question.
In fact, the United States has said that they could perhaps consider it as a non-tariff barrier. However, according to the legislation, Canada has the right to use whatever labelling it wishes.
But it has to respect the international norms and the standards and the laws. We respect our international obligations, but we have every right to have labelling to inform Canadian consumers and to ensure that consumers are healthy. Any time any country changes a label or the rules of import, other countries get nervous.
It works both ways, for Canada and for other countries too.
At the same time, as long as our policies are based on and respect our international trade obligations, I'm quite confident that we can move forward, but it doesn't mean other people are going to like everything we do.