HomeNATO Status Lists ...21. Agreement Between the Parties to the North Atlantic Treaty for the Security of Information, done at Brussels March 6, 1997 hide 21. Agreement Between the Parties to the North Atlantic Treaty for the Security of Information, done at Brussels March 6, 1997 Depositary – Treaty Affairs Office of Treaty Affairs Entered into force August 16, 1998. In accordance with Article 6, paragraph (b), the Agreement entered into force thirty days after the date of deposit by two signatory States of their instruments of ratification, acceptance or approval. It shall enter into force for each other signatory State thirty days after the deposit of its instrument of ratification, acceptance or approval. Download Status List [132 KB] Tags Multilateral Relations and Cooperation NATO