HomeNATO Status Lists ...35. Protocol to the North Atlantic Treaty on the Accession of the Republic of Croatia, done at Brussels July 9, 2008 hide 35. Protocol to the North Atlantic Treaty on the Accession of the Republic of Croatia, done at Brussels July 9, 2008 Depositary – Treaty Affairs Office of Treaty Affairs Entered into force March 30, 2009. In accordance with Article II, the Protocol entered into force when each of the Parties to the North Atlantic Treaty had notified the Government of the United States of America of its acceptance of the Protocol. Download Status List [95 KB] Tags Multilateral North Atlantic Treaty Organization Treaties