By way of derogation from Article 215a, those who hold or transport the cultural goods or national treasures referred to in Article 38 (4) must, at the first request of the customs officers, produce either documents certifying that these goods may leave the customs territory in accordance with the provisions prohibiting export, or any document proving that these goods have been imported temporarily from another Member State of the European Community, or any proof of origin issued by persons or companies duly established within the Community customs territory.