It does. In the seed industry, that's where all of those very rigorous international standards and guidelines come into play, the OECD seed schemes or those of the Association of Official Seed Analysts, AOSA. There are very rigid requirements for different classes of seed pedigree that say, for example, in a 25-gram lot of clover you could have one canola seed, or you could have one piece of dirt, or you could have one other foreign seed. You could have one weed seed, for example. Those aren't the exact standards, so don't quote those, but those are examples.
So seed has always traded that way. All of the members of the OECD seed schemes, for example, which include Europe, accept, acknowledge, and support those standards. Those are recognized. They are accepted, and seed has been traded for decades under those standards.