| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AFGHANISTAN | Accession | 21/07/1960 | |
| ALGERIA | Succession | 21/02/1969 | 05/07/1962 |
| ARGENTINE REPUBLIC | Signature | 25/01/1924 | |
| ARGENTINE REPUBLIC | Ratification | 20/10/1933 | |
| Australia | Extension | 09/02/1925 | |
| AUSTRIA | Accession | 30/06/1928 | |
| AZERBAIJAN | Accession | 28/02/1995 | |
| BAHRAIN | Accession | 27/08/1993 | |
| BELARUS | Accession | 25/02/1994 | |
| BELGIUM | Signature | 25/01/1924 | |
| BELGIUM | Ratification | 02/03/1928 | |
| BOSNIA AND HERZEGOVINA | Accession | 08/08/1994 | |
| BOTSWANA | Accession | 20/06/1968 | |
| BRAZIL | Signature | 25/01/1924 | |
| BRAZIL | Ratification | 14/12/1928 | |
| BULGARIA | Signature | 25/01/1924 | |
| BULGARIA | Ratification | 11/01/1927 | |
| CAMBODIA | Accession | 03/04/1951 | |
| CAMEROON | Succession | 01/01/1960 | |
| CENTRAL AFRICAN REPUBLIC | Accession | 04/08/1959 | |
| CHAD | Accession | 21/09/1959 | |
| CHILE | Accession | 02/04/1962 | |
| CHINA | Accession | 18/02/1992 | |
| CHINA | Declaration | 18/02/1992 | |
| COMOROS | Accession | 22/09/1993 | |
| COSTA RICA | Accession | 28/06/1993 | |
| CROATIA | Accession | 13/01/1992 | |
| CUBA | Accession | 04/09/1972 | |
| Cyprus | Extension | 13/07/1927 | |
| Cyprus | Withdrawal | 24/01/1938 | |
| CYPRUS | Accession | 13/11/1961 | |
| CZECH REPUBLIC | Succession | 15/03/1993 | |
| CZECHOSLOVAKIA | Signature | 25/01/1924 | |
| CZECHOSLOVAKIA | Ratification | 20/06/1925 | |
| DAHOMEY | Accession | 14/03/1975 | |
| DENMARK | Signature | 25/01/1924 | |
| DENMARK | Ratification | 21/01/1925 | |
| ECUADOR | Accession | 08/03/1963 | |
| ECUADOR | Withdrawal | 09/12/1992 | 21/01/1994 |
| ECUADOR | Accession | 09/06/1993 | |
| EGYPT | Signature | 25/01/1924 | |
| EGYPT | Ratification | 06/01/1927 | |
| ERITREA | Accession | 12/09/1994 | |
| ESTONIA | Accession | 13/01/1992 | |
| ETHIOPIA | Accession | 02/11/1977 | |
| Falkland Islands | Extension | 13/07/1927 | |
| Falkland Islands | Withdrawal | 13/07/1934 | |
| FINLAND | Signature | 25/01/1924 | |
| FINLAND | Ratification | 12/01/1925 | |
| FRANCE | Signature | 25/01/1924 | |
| FRANCE | Ratification | 11/06/1926 | |
| GABON | Accession | 27/07/1959 | |
| GAMBIA THE | Accession | 20/03/1965 | |
| GAMBIA THE | Succession | 23/01/1970 | |
| GERMAN DEMOCRATIC REPUBLIC | Re-Application | 31/01/1974 | 25/02/1956 |
| GERMANY | Accession | 16/02/1928 | |
| GERMANY FEDERAL REPUBLIC | Re-Application | 01/01/1951 | |
| GERMANY FEDERAL REPUBLIC | Notification | 05/11/1975 | |
| Gold Coast | Withdrawal | 13/07/1934 | |
| Gold Coast | Extension | 13/07/1927 | |
| GREECE | Signature | 25/01/1924 | |
| GREECE | Ratification | 29/07/1929 | |
| GUATEMALA | Signature | 25/01/1924 | |
| HONDURAS | Accession | 12/04/1994 | |
| HUNGARY | Signature | 25/01/1924 | |
| HUNGARY | Ratification | 02/03/1929 | |
| India | Extension | 26/05/1924 | |
| IRAN | Accession | 24/02/1959 | |
| IRAQ | Accession | 16/04/1928 | |
| Irish Free State | Extension | 30/05/1924 | |
| ITALY | Signature | 25/01/1924 | |
| ITALY | Ratification | 23/05/1927 | |
| IVORY COAST | Accession | 19/03/1962 | |
| JAPAN | Accession | 27/01/1930 | |
| KAZAKHSTAN | Accession | 23/04/1993 | |
| KENYA | Accession | 28/08/1964 | |
| KOREA REPUBLIC OF | Accession | 21/11/1953 | |
| LAOS | Accession | 06/02/1951 | |
| LIBYA | Accession | 07/04/1982 | |
| LITHUANIA | Accession | 21/10/1931 | |
| LUXEMBOURG | Signature | 25/01/1924 | |
| LUXEMBOURG | Ratification | 24/03/1928 | |
| MACEDONIA THE FYR OF | Accession | 10/09/1993 | |
| MALAGASY REPUBLIC | Succession | 29/09/1969 | |
| Malay States, Federated | Withdrawal | 24/01/1938 | |
| Malay States, Federated | Extension | 13/07/1927 | |
| MALI | Accession | 25/01/1961 | |
| Malta | Withdrawal | 13/07/1934 | |
| Malta | Extension | 13/07/1927 | |
| MAURITANIA | Accession | 21/08/1959 | |
| Mauritius | Withdrawal | 13/07/1934 | |
| Mauritius | Extension | 13/07/1927 | |
| MEXICO | Signature | 25/01/1924 | |
| MEXICO | Ratification | 07/12/1949 | |
| MOLDOVA REPUBLIC OF | Accession | 23/01/1995 | |
| MONACO | Signature | 25/01/1924 | |
| MONACO | Ratification | 03/03/1925 | |
| MOROCCO | Signature | 25/01/1924 | |
| MOROCCO | Ratification | 17/01/1925 | |
| MYANMAR | Succession | 24/08/1989 | |
| NETHERLANDS THE | Signature | 25/01/1924 | |
| NETHERLANDS THE | Ratification | 26/08/1926 | |
| NETHERLANDS THE | Re-Application | 01/01/1951 | |
| New Zealand | Extension | 19/08/1924 | |
| NIGER | Accession | 07/07/1959 | |
| NORWAY | Accession | 09/06/1947 | |
| PAKISTAN | Accession | 21/03/1949 | |
| Palestine | Extension | 13/07/1927 | |
| PANAMA | Accession | 28/12/1977 | |
| PARAGUAY | Accession | 12/12/1967 | |
| PERU | Signature | 25/01/1924 | |
| POLAND | Signature | 25/01/1924 | |
| POLAND | Ratification | 18/02/1925 | |
| PORTUGAL | Signature | 25/01/1924 | |
| PORTUGAL | Ratification | 17/06/1926 | |
| QATAR | Accession | 06/05/1994 | |
| Rhodesia And Nyasaland | Extension | 07/05/1962 | |
| ROUMANIA | Signature | 25/01/1924 | |
| ROUMANIA | Ratification | 16/07/1927 | |
| SAUDI ARABIA | Accession | 22/02/1971 | |
| SENEGAL | Accession | 22/02/1961 | |
| SIAM | Signature | 25/01/1924 | |
| SIAM | Ratification | 06/05/1927 | |
| SIERRA LEONE | Accession | 13/04/1970 | |
| SINGAPORE | Accession | 02/11/1993 | |
| SLOVAK REPUBLIC | Succession | 03/05/1993 | |
| SLOVENIA | Accession | 30/12/1991 | |
| SOMALIA | Accession | 10/05/1974 | |
| Somaliland | Extension | 13/07/1927 | |
| South Africa | Extension | 04/11/1936 | |
| SOVIET UNION | Accession | 20/10/1927 | |
| SPAIN | Signature | 25/01/1924 | |
| SPAIN | Ratification | 11/02/1927 | |
| SUDAN | Accession | 10/10/1959 | |
| SWEDEN | Signature | 25/01/1924 | |
| SWEDEN | Ratification | 17/09/1925 | |
| SWITZERLAND | Signature | 25/01/1924 | |
| SWITZERLAND | Ratification | 06/07/1926 | |
| Trinidad | Extension | 13/07/1927 | |
| TUNIS | Signature | 25/01/1924 | |
| TUNIS | Ratification | 13/02/1925 | |
| UKRAINE | Accession | 16/06/1993 | |
| UNITED ARAB EMIRATES | Accession | 14/04/1980 | |
| UNITED KINGDOM | Declaration | 25/01/1924 | |
| UNITED KINGDOM | Signature | 25/01/1924 | |
| UNITED KINGDOM | Ratification | 11/07/1925 | |
| UNITED KINGDOM | Re-Application | 01/01/1951 | |
| UNITED STATES OF AMERICA | Accession | 29/07/1975 | |
| UPPER VOLTA | Accession | 05/12/1961 | |
| VANUATU | Accession | 29/06/1981 | |
| VIETNAM | Accession | 22/02/1951 |