Artikel 4

1. The following security classifications of the Parties are equivalent and correspond to the security classification levels specified in their national legislation:
[tabel]
1 For the purpose of this agreement, this English equivalent for classification is used. The official classifications to be used for the marking of classified information are in Finnish/Swedish and Dutch.
2. The Parties shall take all appropriate measures to ensure that the Receiving Party shall mark all the Classified Information under this Agreement that it has received from the Providing Party with the security classification that corresponds to the security classification given by the Originating Party in accordance with the scheme contained in paragraph 1 of this Article.
3. The Parties shall take all appropriate measures to ensure that the Receiving Party shall not modify or revoke the security classification of received Classified Information under this Agreement without the written approval of the Originating Party.
4. The Originating Party shall ensure that the Receiving Party will be informed of any change in the security classification level of the Classified Information provided.