HomeNATO Status Lists ...14. Protocol to the North Atlantic Treaty on the Accession of Spain, done at Brussels December 10, 1981 hide 14. Protocol to the North Atlantic Treaty on the Accession of Spain, done at Brussels December 10, 1981 Depositary – Treaty Affairs Office of Treaty Affairs Entered into force May 29, 1982. In accordance with Article II, 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 [95 KB] Tags Multilateral North Atlantic Treaty Organization Treaties