HomeNATO Status Lists ...04. Protocol to the North Atlantic Treaty on the Accession of Greece and Turkey, done at London October 17, 1951 hide 04. Protocol to the North Atlantic Treaty on the Accession of Greece and Turkey, done at London October 17, 1951 Depositary – Treaty Affairs Office of Treaty Affairs Entered into force February 15, 1952. In accordance with Article III, the Protocol entered into force when each of the Parties to the North Atlantic Treaty notified the Government of the United States of America of its acceptance of the Protocol. Download Status List [111 KB] Tags Multilateral North Atlantic Treaty Organization Treaties