| Country | Action | Action Date | Effective Date |
|---|
| ANGOLA | Ratification | 04/06/1976 | |
| Anguilla | Extension | 29/05/1963 | |
| Antigua | Extension | 04/06/1962 | |
| ANTIGUA AND BARBUDA | Succession | 02/02/1983 | |
| ARGENTINA | Ratification | 26/05/1936 | |
| Aruba | Extension | 01/01/1986 | 01/01/1986 |
| AUSTRALIA | Ratification | 07/06/1960 | |
| AUSTRIA | Ratification | 14/06/1954 | |
| Bahamas | Extension | 02/05/1967 | |
| BAHAMAS | Succession | 25/05/1976 | |
| BARBADOS | Ratification | 08/05/1967 | |
| BELGIUM | Ratification | 26/10/1932 | |
| BELIZE | Ratification | 15/12/1983 | 15/12/1984 |
| Bermuda | Extension | 02/05/1967 | |
| BOSNIA AND HERZEGOVINA | Ratification | 02/06/1993 | 02/06/1993 |
| BRAZIL | Ratification | 25/04/1957 | |
| British Honduras | Extension | 04/06/1962 | |
| British Virgin Islands | Extension | 05/10/1962 | |
| Brunei | Extension | 26/04/1965 | |
| BULGARIA | Ratification | 06/03/1925 | |
| BURUNDI | Ratification | 11/03/1963 | |
| CHILE | Ratification | 15/09/1925 | |
| COLOMBIA | Ratification | 20/06/1933 | |
| COMOROS | Ratification | 23/10/1978 | 23/10/1978 |
| CONGO, DEMOCRATIC REPUBLIC OF | Ratification | 20/09/1960 | |
| CROATIA | Ratification | 08/10/1991 | |
| CUBA | Ratification | 22/08/1935 | |
| CZECH REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| DENMARK | Ratification | 26/02/1923 | |
| DJIBOUTI | Ratification | 03/08/1978 | 03/08/1978 |
| Dominica | Extension | 04/06/1962 | |
| DOMINICA, COMMONWEALTH OF | Ratification | 28/02/1983 | |
| EL SALVADOR | Ratification | 11/10/1955 | |
| ESTONIA | Ratification | 08/09/1922 | 08/09/1922 |
| ETHIOPIA | Ratification | 04/06/1963 | |
| Falkland Islands | Extension | 04/06/1962 | |
| Faroe Islands | Extension | 28/11/1960 | |
| Fiji | Extension | 26/06/1962 | |
| FIJI | Succession | 19/04/1974 | |
| FINLAND | Ratification | 20/01/1950 | |
| FRANCE | Ratification | 04/04/1928 | |
| French Overseas Departments | Extension | 27/11/1974 | |
| French Overseas Territories | Extension | 27/11/1974 | |
| GABON | Ratification | 13/06/1961 | |
| GERMANY | Ratification | 06/06/1925 | |
| Gibraltar | Extension | 04/06/1962 | |
| Gilbert And Ellice Islands | Extension | 04/06/1962 | |
| Grenada | Extension | 27/06/1963 | |
| GRENADA | Succession | 09/07/1979 | |
| Guernsey | Extension | 06/08/1923 | |
| GUINEA BISSAU | Succession | 21/02/1977 | |
| GUYANA | Ratification | 08/06/1966 | |
| HAITI | Ratification | 19/04/1955 | |
| Hong Kong | Decision Resvd. | 20/08/1963 | |
| Hong Kong | Extension | 23/11/1973 | |
| HUNGARY | Ratification | 08/06/1956 | |
| IRELAND, REPUBLIC OF | Ratification | 17/06/1924 | |
| Isle of Man | Extension | 06/08/1923 | |
| ITALY | Ratification | 01/09/1930 | |
| Jersey | Extension | 06/08/1923 | |
| KENYA | Ratification | 13/01/1964 | |
| LATVIA | Ratification | 29/11/1929 | 29/11/1929 |
| LUXEMBOURG | Ratification | 16/04/1928 | |
| MADAGASCAR | Ratification | 10/08/1962 | |
| MALAWI | Succession | 22/03/1965 | |
| MALAYA | Ratification | 05/06/1961 | |
| MALAYSIA | Ratification | 03/03/1964 | |
| Malta | Extension | 26/06/1962 | |
| MALTA | Ratification | 04/01/1965 | |
| Mauritius | Extension | 04/06/1962 | |
| MAURITIUS | Ratification | 02/12/1969 | |
| MEXICO | Ratification | 01/11/1937 | |
| Montserrat | Extension | 04/06/1962 | |
| MOROCCO | Ratification | 20/09/1956 | |
| NETHERLANDS THE | Ratification | 20/08/1926 | |
| NEW ZEALAND | Ratification | 29/03/1938 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| Northern Rhodesia | Extension | 15/12/1962 | |
| NORWAY | Ratification | 22/01/1963 | |
| Nyasaland | Extension | 07/12/1962 | |
| PANAMA | Ratification | 03/06/1958 | |
| Papua New Guinea | Extension | 31/01/1966 | |
| PAPUA NEW GUINEA | Succession | 01/05/1976 | |
| PERU | Ratification | 04/04/1962 | |
| POLAND | Ratification | 21/06/1924 | |
| PORTUGAL | Ratification | 16/05/1960 | |
| RWANDA | Ratification | 18/09/1962 | |
| SAINT LUCIA | Ratification | 14/05/1980 | 14/05/1980 |
| Sarawak | Extension | 23/08/1962 | |
| SENEGAL | Ratification | 22/10/1962 | |
| Singapore | Extension | 05/07/1962 | |
| SINGAPORE | Succession | 25/10/1965 | |
| SLOVAK REPUBLIC | Ratification | 01/01/1993 | 01/01/1993 |
| SLOVENIA | Ratification | 29/05/1992 | |
| Solomon Islands | Extension | 04/06/1962 | |
| SOLOMON ISLANDS | Succession | 06/08/1985 | 06/08/1985 |
| SPAIN | Ratification | 01/10/1931 | |
| St Christopher, Nevis and Anguilla | Extension | 29/05/1963 | |
| St Helena | Extension | 05/10/1962 | |
| St Kitts | Extension | 29/05/1963 | |
| St Lucia | Extension | 04/06/1962 | |
| St Vincent | Extension | 04/06/1962 | |
| ST VINCENT AND THE GRENADINES | Ratification | 21/10/1998 | 31/05/1995 |
| Swaziland | Extension | 15/10/1963 | |
| SWAZILAND | Succession | 26/04/1978 | |
| SWEDEN | Ratification | 27/11/1923 | |
| TANGANYIKA | Ratification | 19/11/1962 | |
| TANGANYIKA AND ZANZIBAR | Ratification | 22/06/1964 | |
| The Gambia | Extension | 05/10/1962 | |
| TUNISIA | Ratification | 15/05/1957 | |
| UGANDA | Succession | 04/06/1963 | |
| UNITED KINGDOM | Ratification | 06/08/1923 | |
| URUGUAY | Ratification | 06/06/1933 | |
| YUGOSLAVIA | Ratification | 27/01/1958 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Ratification | 24/11/2000 | 24/11/2000 |
| ZAMBIA | Ratification | 02/12/1964 | |
| ZAMBIA | Confirmation | 04/01/1965 | |