There are national standards. In the case of the European Union, there is an international standard that is particular to that jurisdiction. Governments negotiate equivalency agreements. We have an equivalency agreement with the European Union. We have one with the United States. We also have one with Japan.
That's how an international standard is enforced. Negotiators get together and decide on the essential elements of each of the national standards, and they don't allow trade unless those standards are deemed to be equivalent.