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| Albania (October 8th, 1921) |
| Austria (November 15th, 1923) |
| British Empire 2 , including Newfoundland (August 2nd, 1922) Subject to the declaration inserted in the Procès- verbal of the meeting of April 19th, 1921, as to the British Dominions which have not been represented at the Barcelona Conference. Federated Malay States: Perak, Selangor, Negri Sembilan and Pahang(August 22nd, 1923 a) Non-Federated Malay States: Brunei, Johore, Kedah, Perlis, Kelantan and Trengganu(August 22nd, 1923 a) Palestine (January 28th, 1924 a) |
| New Zealand (August 2nd, 1922) |
| India 3 [August 2nd, 1922] |
| Bulgaria (July 11th, 1922) |
| Chile (March 19th, 1928) |
| Czechoslovakia 4 (September 8th, 1924) |
| Denmark (November 13th, 1922) |
| Finland (January 29th, 1923) |
| France (December 31st, 1926) |
| Greece (January 3rd, 1928) |
| Hungary (May 18th, 1928 a) |
| Italy (August 5th, 1922) |
| Luxembourg (March 19th, 1930) |
| Norway (September 4th, 1923) |
| Romania (May 9th, 1924 a) In so far as its provisions are not in conflict with the principles of the new Danube Statute drawn up by the International Commission which was appointed in accordance with Articles 349 of the Treaty of Versailles, 304 of the Treaty of Saint-Germain, 232 of the Treaty of Neuilly and 288 of the Treaty of Trianon. |
| Sweden (September 15th, 1927) |
| Thailand (November 29th, 1922 a) |
| Turkey (June 27th, 1933 a) |