in connection with differential customs duties: it certifies from which country the goods have come and is usually provided by a chamber of commerce in the country of origin, a specific document identifying the goods, in which the authority or body empowered to issue it certifies expressly that the goods to which the certificate relates originate in a specific country. This certificate may also include a declaration by the manufacturer, producer, supplier, exporter or other competent person (here the word "country" may include a group of countries, a region or part of a country)