| Country | Action | Action Date | Effective Date |
|---|
| Anguilla | Extension | 11/06/1987 | 01/01/1900 |
| ARGENTINA | Ratification | 14/03/1950 | |
| Aruba | Extension | 01/01/1986 | 01/01/1986 |
| Aruba | Declaration | 01/01/1986 | 01/01/1986 |
| AZERBAIJAN | Ratification | 19/05/1992 | 19/05/1992 |
| BELGIUM | Ratification | 03/10/1927 | |
| Bermuda | Extension | 11/06/1987 | 01/01/1900 |
| BOSNIA AND HERZEGOVINA | Ratification | 02/06/1993 | 02/06/1993 |
| British Virgin Islands | Extension | 11/06/1987 | 01/01/1900 |
| BULGARIA | Ratification | 29/11/1929 | |
| CHINA | Ratification | 02/12/1936 | |
| COLOMBIA | Ratification | 20/06/1933 | |
| CROATIA | Ratification | 08/10/1991 | |
| CUBA | Ratification | 07/07/1928 | |
| DJIBOUTI | Ratification | 03/08/1978 | |
| EGYPT | Ratification | 04/08/1982 | |
| ESTONIA | Ratification | 09/07/1928 | |
| Falkland Islands | Extension | 11/06/1987 | 01/01/1900 |
| FRANCE | Ratification | 04/03/1929 | |
| FRANCE | Declaration | 27/11/1974 | |
| FRANCE | Declaration | 18/06/1990 | 18/06/1990 |
| GERMAN DEMOCRATIC REPUBLIC | Ratification | 01/01/1974 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 14/03/1930 | |
| GHANA | Ratification | 18/03/1965 | |
| Gibraltar | Extension | 20/05/1988 | |
| GREECE | Ratification | 06/05/1981 | |
| Hong Kong | Declaration | 06/03/1992 | 06/03/1992 |
| IRAQ | Ratification | 23/09/1976 | |
| Irish Free State | Ratification | 05/07/1930 | |
| Isle of Man | Extension | 11/06/1987 | 01/01/1900 |
| ITALY | Ratification | 10/10/1929 | |
| KYRGYZSTAN | Ratification | 31/03/1992 | 31/03/1992 |
| LIBERIA | Ratification | 21/06/1977 | |
| LUXEMBOURG | Ratification | 16/04/1928 | |
| MAURITANIA | Ratification | 08/11/1963 | |
| MEXICO | Ratification | 12/05/1934 | |
| MEXICO | Denunciation | 15/03/2002 | 15/03/2003 |
| Netherlands Antilles | Extension | 05/08/1957 | |
| NETHERLANDS THE | Ratification | 05/05/1948 | |
| NEW ZEALAND | Ratification | 11/01/1980 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| PANAMA | Ratification | 19/06/1970 | |
| PERU | Ratification | 04/04/1962 | |
| PHILIPPINES | Ratification | 17/11/1960 | |
| POLAND | Ratification | 08/08/1931 | |
| PORTUGAL | Ratification | 23/05/1983 | |
| PORTUGAL | Declaration | 19/11/1999 | |
| SLOVENIA | Ratification | 09/06/1992 | 09/06/1992 |
| SOMALI DEMOCRATIC REPUBLIC | Succession | 11/06/1975 | |
| SOMALIA | Ratification | 18/11/1960 | |
| SOVIET UNION | Ratification | 04/11/1969 | |
| SPAIN | Ratification | 23/02/1931 | |
| SWITZERLAND | Ratification | 21/04/1960 | |
| TAJIKISTAN | Ratification | 26/11/1993 | 26/11/1993 |
| TUNISIA | Ratification | 14/04/1970 | |
| UKRAINE S S R | Ratification | 17/06/1970 | |
| UNITED KINGDOM | Signature | 23/06/1926 | |
| UNITED KINGDOM | Ratification | 03/06/1985 | |
| UNITED KINGDOM | Reservation | 03/06/1985 | |
| UNITED KINGDOM | Declaration | 25/05/1988 | |
| UNITED KINGDOM | Declaration | 06/03/1992 | 06/03/1992 |
| URUGUAY | Ratification | 06/06/1933 | |
| YUGOSLAVIA | Ratification | 30/09/1929 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Ratification | 24/11/2000 | 24/11/2000 |