HomeNATO Status Lists ...36. Protocol to the North Atlantic Treaty on the Accession of Montenegro, done at Brussels May 19, 2016 hide 36. Protocol to the North Atlantic Treaty on the Accession of Montenegro, done at Brussels May 19, 2016 Depositary – Treaty Affairs Office of Treaty Affairs Entered into force June 1, 2017. In accordance with Article II, the Protocol enters into force when each of the Parties to the North Atlantic Treaty has notified the Government of the United States of America of its acceptance of the Protocol. Download Status List [120 KB] Tags Multilateral North Atlantic Treaty Organization Treaties