| Country | Action | Action Date | Effective Date |
|---|
| Aden Colony | Extension | 24/02/1964 | |
| Anguilla | Extension | 29/05/1963 | |
| Antigua | Extension | 04/06/1962 | |
| Antilles | Extension | 05/08/1957 | |
| ARGENTINA | Ratification | 30/11/1933 | |
| Aruba | Extension | 01/01/1986 | 01/01/1986 |
| AUSTRALIA | Ratification | 28/06/1935 | |
| Bahamas | Extension | 04/06/1962 | |
| Barbados | Extension | 26/06/1962 | |
| Basutoland | Extension | 26/11/1962 | |
| Bechuanaland | Extension | 04/06/1962 | |
| BELGIUM | Ratification | 04/02/1925 | |
| BELIZE | Ratification | 15/12/1983 | 15/12/1983 |
| Bermuda | Extension | 03/03/1964 | |
| BOSNIA AND HERZEGOVINA | Succession | 02/06/1993 | 02/06/1993 |
| British Guiana | Extension | 16/06/1965 | |
| British Honduras | Extension | 12/06/1964 | |
| British Virgin Islands | Extension | 05/10/1962 | |
| Brunei | Extension | 26/04/1965 | |
| BULGARIA | Ratification | 16/03/1923 | |
| CANADA | Ratification | 31/03/1926 | |
| CEYLON | Ratification | 25/04/1951 | |
| CHILE | Ratification | 18/10/1935 | |
| COLOMBIA | Ratification | 20/06/1933 | |
| COSTA RICA | Ratification | 23/07/1991 | |
| CROATIA | Succession | 08/10/1991 | 08/10/1991 |
| CUBA | Extension | 06/08/1928 | |
| DENMARK | Ratification | 15/02/1938 | |
| Dominica | Extension | 04/06/1962 | |
| DOMINICA, COMMONWEALTH OF | Ratification | 28/02/1983 | |
| ESTONIA | Ratification | 03/03/1923 | 03/03/1923 |
| Falkland Islands | Extension | 04/06/1962 | |
| Fiji | Extension | 26/06/1962 | |
| FIJI | Ratification | 19/04/1974 | |
| FINLAND | Ratification | 20/01/1950 | |
| FRANCE | Ratification | 21/03/1929 | |
| French Overseas Departments | Extension | 27/11/1974 | |
| GERMANY | Ratification | 04/03/1930 | |
| GHANA | Ratification | 18/03/1965 | 18/03/1965 |
| Gibraltar | Extension | 04/06/1962 | |
| Gilbert And Ellice Islands | Extension | 15/10/1963 | |
| GREECE | Ratification | 16/12/1925 | |
| Grenada | Extension | 27/06/1963 | |
| GRENADA | Succession | 09/07/1979 | |
| Guernsey | Extension | 12/03/1926 | |
| Hong Kong | Extension | 20/08/1963 | |
| IRAQ | Ratification | 19/04/1966 | |
| IRELAND, REPUBLIC OF | Ratification | 05/07/1930 | |
| Isle of Man | Extension | 12/03/1926 | |
| ITALY | Ratification | 08/09/1924 | |
| JAMAICA | Ratification | 08/07/1963 | |
| JAPAN | Ratification | 22/08/1955 | |
| Jersey | Extension | 12/03/1926 | |
| Kenya | Extension | 04/06/1962 | |
| LATVIA | Ratification | 29/08/1930 | 29/08/1993 |
| LEBANON | Ratification | 06/12/1993 | 06/12/1993 |
| LUXEMBOURG | Ratification | 16/04/1928 | |
| Malta | Extension | 26/06/1962 | |
| MALTA | Ratification | 04/01/1965 | |
| Mauritius | Extension | 23/08/1962 | |
| MAURITIUS | Ratification | 02/12/1969 | |
| MEXICO | Ratification | 20/05/1937 | |
| Montserrat | Extension | 04/06/1962 | |
| NETHERLANDS THE | Ratification | 15/12/1937 | |
| NEW ZEALAND | Ratification | 11/01/1980 | |
| NEW ZEALAND | Declaration | 11/01/1980 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| NIGERIA | Ratification | 16/06/1961 | |
| Northern Rhodesia | Extension | 15/01/1963 | |
| NORWAY | Ratification | 21/07/1936 | |
| Nyasaland | Extension | 07/12/1962 | |
| PANAMA | Ratification | 19/06/1970 | |
| PAPUA NEW GUINEA | Succession | 01/05/1976 | |
| PERU | Ratification | 04/04/1962 | |
| POLAND | Ratification | 21/06/1924 | |
| PORTUGAL | Ratification | 19/05/1981 | |
| PORTUGAL | Declaration | 18/11/1999 | |
| ROMANIA | Ratification | 10/11/1930 | |
| SAINT LUCIA | Succession | 14/05/1980 | 14/05/1980 |
| Seychelles | Extension | 04/06/1962 | |
| SEYCHELLES | Succession | 06/02/1978 | 06/02/1978 |
| SIERRA LEONE | Ratification | 15/06/1961 | |
| Singapore | Extension | 05/07/1962 | |
| SINGAPORE | Succession | 25/10/1965 | |
| SLOVENIA | Ratification | 29/05/1992 | |
| Solomon Islands | Extension | 04/06/1962 | |
| SOLOMON ISLANDS | Succession | 06/08/1985 | 06/08/1985 |
| Southern Rhodesia | Extension | 15/10/1963 | |
| SPAIN | Ratification | 20/06/1924 | |
| St Helena | Extension | 05/10/1962 | |
| St Kitts | Extension | 29/05/1963 | |
| St Lucia | Extension | 04/06/1962 | |
| St Vincent | Extension | 04/06/1962 | |
| Swaziland | Extension | 04/06/1962 | |
| SWEDEN | Ratification | 01/01/1935 | |
| SWITZERLAND | Ratification | 21/04/1960 | |
| The Gambia | Extension | 05/10/1962 | |
| TUNISIA | Ratification | 14/04/1970 | |
| Uganda | Extension | 04/06/1962 | |
| UNITED KINGDOM | Ratification | 12/03/1926 | |
| URUGUAY | Ratification | 06/06/1933 | |
| URUGUAY | Denunciation | 17/10/1955 | |
| YUGOSLAVIA | Ratification | 30/09/1929 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Ratification | 24/11/2000 | 24/11/2000 |
| Zanzibar | Extension | 23/08/1962 | |