| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ANGOLA | Succession | 04/06/1976 | |
| Anguilla | Decision Resvd. | 27/03/1950 | |
| ARGENTINA | Ratification | 14/03/1950 | |
| AUSTRALIA | Ratification | 09/03/1931 | |
| AUSTRALIA | Declaration | 21/06/1973 | |
| AUSTRIA | Ratification | 16/08/1935 | |
| AZERBAIJAN | Ratification | 19/05/1992 | 19/05/1992 |
| BANGLADESH | Declaration | 22/06/1972 | |
| Belgian Congo | Extension | 08/10/1954 | |
| BELGIUM | Ratification | 06/06/1934 | |
| BELGIUM | Declaration | 08/10/1954 | |
| Bermuda | Decision Resvd. | 27/03/1950 | |
| BOSNIA AND HERZEGOVINA | Ratification | 02/06/1993 | 02/06/1993 |
| British Virgin Islands | Decision Resvd. | 27/03/1950 | |
| BULGARIA | Ratification | 04/06/1935 | |
| BURMA | Ratification | 07/09/1931 | |
| BURUNDI | Ratification | 11/03/1963 | |
| BYELORUSSIA S S R | Ratification | 11/03/1970 | |
| CANADA | Ratification | 30/06/1938 | |
| CHILE | Ratification | 31/05/1933 | |
| CHINA | Ratification | 24/06/1931 | |
| CHINA | Declaration | 20/10/1999 | |
| CROATIA | Ratification | 08/10/1991 | |
| CUBA | Ratification | 19/07/1954 | |
| CZECH REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Ratification | 26/03/1934 | |
| DENMARK | Provisional application | 18/01/1933 | |
| DENMARK | Ratification | 01/10/1981 | |
| ESTONIA | Ratification | 18/01/1932 | |
| Falkland Islands | Decision Resvd. | 27/03/1950 | |
| Faroe Islands | App without mod | 01/10/1981 | |
| FINLAND | Ratification | 08/08/1932 | |
| FRANCE | Ratification | 29/07/1935 | |
| FRANCE | Declaration | 27/11/1974 | |
| GERMAN DEMOCRATIC REPUBLIC | Ratification | 01/01/1974 | |
| GERMANY | Ratification | 05/07/1933 | |
| Gibraltar | Decision Resvd. | 27/03/1950 | |
| GREECE | Ratification | 30/05/1936 | |
| GUINEA BISSAU | Succession | 21/02/1977 | |
| HONDURAS | Ratification | 09/06/1980 | 09/06/1981 |
| Hong Kong | Decision Resvd. | 27/03/1950 | |
| HUNGARY | Ratification | 06/12/1937 | |
| INDIA | Ratification | 07/09/1931 | |
| INDONESIA | Ratification | 12/06/1950 | |
| IRAQ | Ratification | 21/11/1966 | |
| IRELAND, REPUBLIC OF | Ratification | 05/07/1930 | |
| ITALY | Ratification | 18/07/1933 | |
| JAPAN | Ratification | 16/03/1931 | |
| KENYA | Ratification | 09/02/1971 | |
| KYRGYZSTAN | Succession | 31/03/1992 | 31/03/1992 |
| LITHUANIA | Ratification | 28/09/1934 | |
| LUXEMBOURG | Ratification | 01/04/1931 | |
| MEXICO | Ratification | 12/05/1934 | |
| Montserrat | Decision Resvd. | 27/03/1950 | |
| MOROCCO | Ratification | 20/09/1956 | |
| NETHERLANDS THE | Ratification | 04/01/1933 | |
| NETHERLANDS THE | Declaration | 05/08/1957 | |
| New Guinea | Extension | 21/06/1973 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| Norfolk Island | App without mod | 21/06/1973 | |
| NORWAY | Ratification | 01/07/1932 | |
| PAKISTAN | Ratification | 07/09/1931 | |
| PANAMA | Ratification | 19/06/1970 | |
| Papua | Extension | 15/06/1973 | |
| Papua | App without mod | 21/06/1973 | |
| PAPUA NEW GUINEA | Succession | 01/05/1976 | |
| PERU | Ratification | 04/04/1962 | |
| POLAND | Ratification | 18/06/1932 | |
| PORTUGAL | Ratification | 01/03/1932 | |
| PORTUGAL | Declaration | 04/10/1999 | |
| ROUMANIA | Ratification | 07/12/1932 | |
| Ruanda Urundi | Ratification | 08/10/1954 | |
| SLOVAK REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| SLOVENIA | Ratification | 09/06/1992 | 09/06/1992 |
| SOUTH AFRICA | Ratification | 21/02/1933 | |
| SOVIET UNION | Ratification | 04/11/1969 | |
| SPAIN | Ratification | 29/08/1932 | |
| St Helena | Decision Resvd. | 27/03/1950 | |
| Surinam | Extension | 05/08/1957 | |
| SURINAME | Succession | 15/06/1976 | |
| SWEDEN | Ratification | 11/04/1932 | |
| SWITZERLAND | Ratification | 08/11/1934 | |
| TAJIKISTAN | Succession | 26/11/1993 | 26/11/1993 |
| UKRAINE | Ratification | 17/06/1970 | |
| UNITED KINGDOM | |||
| URUGUAY | Ratification | 06/06/1933 | |
| VENEZUELA | Ratification | 17/12/1932 | |
| VIETNAM | Ratification | 03/10/1994 | 03/10/1995 |
| YUGOSLAVIA | Ratification | 22/04/1933 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Ratification | 24/11/2000 | 24/11/2000 |
| ZAIRE | Ratification | 20/09/1960 |