Protocol amending the Ancillary Agreement between the European Union and its Member States, of the first part, Iceland, of the second part, and the Kingdom of Norway, of the third part, on the application of the Air Transport Agreement between the United States of America, of the first part, the European Union and its Member States, of the second part, Iceland, of the third part, and the Kingdom of Norway, of the fourth part, signed on 16 and 21 June 2011, to take account of the accession to the European Union of the Republic of Croatia