Under the Tariff Act of 1930, every article of foreign origin (or its container) imported into the U.S., unless exempted, must be marked in a manner that will indicate to the ultimate purchaser the article's country of origin. Some, but not all foods, are exempted. Among the food products exempted from COO marking requirements are: vegetables, fruits, nuts, berries, live or dead animals, fish, and birds in their natural state. For more information on this topic, see the PackagingLaw.com article: Country of Origin Marking Requirements.