| Country | Action | Action Date | Effective Date |
|---|
| ALGERIA | Ratification | 19/10/1962 | |
| Anguilla | Decision Resvd. | 27/03/1950 | |
| ARGENTINA | Ratification | 30/11/1933 | |
| Bermuda | Decision Resvd. | 27/03/1950 | |
| BOSNIA AND HERZEGOVINA | Succession | 02/06/1993 | 02/06/1993 |
| BRAZIL | Ratification | 26/04/1934 | |
| British Virgin Islands | Decision Resvd. | 27/03/1950 | |
| BULGARIA | Ratification | 14/02/1922 | |
| CAMEROON | Ratification | 25/05/1970 | |
| CENTRAL AFRICAN REPUBLIC | Ratification | 09/06/1964 | |
| CHILE | Ratification | 15/09/1925 | |
| COLOMBIA | Ratification | 20/06/1933 | |
| CROATIA | Ratification | 08/10/1991 | 08/10/1991 |
| CUBA | Ratification | 06/08/1928 | |
| Falkland Islands | Decision Resvd. | 27/03/1950 | |
| FRANCE | Ratification | 16/12/1950 | |
| FRANCE | Declaration | 16/12/1950 | |
| FRANCE | Declaration | 19/03/1954 | |
| FRANCE | Declaration | 07/02/1967 | |
| French Cameroons | Extension | 19/03/1954 | |
| French Equatorial Africa | Extension | 19/03/1954 | |
| French Guiana | Extension | 07/02/1967 | |
| French Settlements In India | Extension | 16/12/1950 | |
| French Settlements In Oceania | Extension | 16/12/1950 | |
| French Somaliland | Extension | 16/12/1950 | |
| French Togoland | Extension | 16/12/1950 | |
| French West Africa | Extension | 16/12/1950 | |
| GABON | Ratification | 13/06/1961 | |
| GERMANY | Ratification | 31/10/1927 | |
| GERMANY FEDERAL REPUBLIC | Bound | 01/01/1905 | |
| Gibraltar | Decision Resvd. | 27/03/1950 | |
| GREECE | Ratification | 19/11/1920 | |
| Guadeloupe | Extension | 07/02/1967 | |
| GUINEA | Ratification | 12/12/1966 | |
| Hong Kong | Extension | 29/06/1982 | |
| Hong Kong | Declaration | 27/04/1984 | 27/04/1984 |
| HUNGARY | Ratification | 19/04/1928 | |
| ITALY | Ratification | 22/10/1952 | |
| ITALY | Declaration | 07/06/1954 | |
| IVORY COAST | Ratification | 05/05/1961 | |
| LATVIA | Ratification | 03/06/1926 | 03/06/1926 |
| LIBYA | Ratification | 27/05/1971 | |
| LUXEMBOURG | Ratification | 16/04/1928 | |
| Madagascar And Dependencies | Extension | 16/12/1950 | |
| Martinique | Extension | 07/02/1967 | |
| MAURITANIA | Ratification | 08/11/1963 | |
| Montserrat | Decision Resvd. | 27/03/1950 | |
| New Caledonia | Extension | 16/12/1950 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| Norfolk Island | Decision Resvd. | 15/06/1973 | |
| PANAMA | Ratification | 03/06/1958 | |
| Papua New Guinea | Decision Resvd. | 15/06/1973 | |
| ROMANIA | Ratification | 13/06/1921 | |
| Solomon Islands | Extension | 27/03/1950 | |
| Somaliland | Application | 07/06/1954 | |
| Southern Rhodesia | Extension | 27/03/1950 | |
| SPAIN | Ratification | 04/07/1923 | |
| St Helena | Decision Resvd. | 27/03/1950 | |
| St Pierre and Miquelon | Extension | 16/12/1950 | |
| UNITED KINGDOM | | | |
| UPPER VOLTA | Ratification | 30/06/1969 | 30/06/1970 |
| URUGUAY | Accession | 06/06/1933 | |
| URUGUAY | Denunciation | 17/10/1955 | |
| VENEZUELA | Ratification | 20/11/1944 | |
| YUGOSLAVIA | Ratification | 01/04/1927 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Ratification | 24/11/2000 | 24/11/2000 |