Feel free to step in, if you want.
The situation we have now in Canada is that we, as an industry, have made a decision to voluntarily remove the use of ractopamine as an additive in our country as a whole. It doesn't matter if it's the domestic, foreign, or export market, we do not use the product in our pork-producing systems.
“Exposed” is the chance that we are subject to, say, some levels of cross-contamination when that product is being used in a feed mill that's manufacturing a product for a different use and that can somehow possibly cause cross-contamination and a risk of us being exposed.
What we have with our export nations is a ractopamine-free certification program. That means we're letting them know that our pork has not been exposed to this product, so our acceptable residue level is essentially zero.