| Country | Action | Action Date | Effective Date |
|---|
| Anguilla | Extension | 20/08/1963 | |
| Antilles And Suriname | Extension | 13/07/1951 | |
| ARGENTINA | Ratification | 30/11/1933 | |
| Aruba | Extension | 01/01/1986 | 01/01/1986 |
| Aruba | Declaration | 01/01/1986 | 01/01/1986 |
| AUSTRALIA | Ratification | 15/06/1972 | |
| AUSTRALIA | Declaration | 21/06/1973 | |
| AUSTRIA | Ratification | 12/06/1924 | |
| Bahamas | Extension | 03/04/1963 | |
| Basutoland | Extension | 07/07/1964 | |
| Bechuanaland | Decision Resvd. | 18/02/1963 | |
| BELGIUM | Ratification | 25/08/1930 | |
| Bermuda | Decision Resvd. | 04/02/1963 | |
| BOSNIA AND HERZEGOVINA | Succession | 02/06/1993 | 02/06/1993 |
| British Guiana | Extension | 24/11/1964 | |
| British Virgin Islands | Extension | 22/08/1963 | |
| Brunei | Extension | 03/08/1964 | |
| BULGARIA | Ratification | 14/02/1922 | |
| BULGARIA | Denunciation | 20/07/1960 | |
| BURMA | Ratification | 14/07/1921 | |
| CENTRAL AFRICAN REPUBLIC | Ratification | 09/06/1964 | |
| CHILE | Ratification | 31/05/1933 | |
| COLOMBIA | Ratification | 20/06/1933 | |
| CYPRUS | Succession | 08/10/1965 | 08/10/1965 |
| DENMARK | Ratification | 13/10/1921 | |
| DJIBOUTI | Succession | 03/08/1978 | 03/08/1978 |
| ECUADOR | Ratification | 05/02/1962 | |
| EGYPT | Ratification | 03/07/1954 | |
| ESTONIA | Ratification | 20/12/1922 | |
| ESTONIA | Declaration | 20/12/1922 | |
| ETHIOPIA | Ratification | 11/06/1966 | |
| Falkland Islands | Extension | 08/05/1963 | |
| Fiji | Decision Resvd. | 18/02/1963 | |
| FINLAND | Ratification | 19/10/1921 | |
| FRANCE | Ratification | 25/08/1925 | |
| FRANCE | Declaration | 27/11/1974 | |
| GERMANY | | | |
| Gibraltar | Extension | 07/03/1963 | |
| Gilbert & Ellice Colony | Decision Resvd. | 18/02/1963 | |
| GREECE | Ratification | 19/11/1920 | |
| Grenada | Extension | 27/06/1963 | |
| Guernsey | Extension | 14/07/1921 | |
| GUYANA | Ratification | 08/06/1966 | |
| Hong Kong | Declaration | 04/02/1963 | |
| Hong Kong | Application | 11/01/1977 | |
| HUNGARY | Ratification | 01/03/1928 | |
| ICELAND | Ratification | 17/02/1958 | |
| INDIA | Ratification | 14/07/1921 | |
| INDIA | Denunciation | 16/04/1938 | |
| IRELAND, REPUBLIC OF | Ratification | 04/09/1925 | |
| Isle of Man | Extension | 14/07/1921 | |
| ITALY | Ratification | 10/04/1923 | |
| JAPAN | Ratification | 23/11/1922 | |
| Jersey | Extension | 14/07/1921 | |
| Kenya | Extension | 09/09/1963 | |
| KENYA | Ratification | 13/01/1964 | |
| LUXEMBOURG | Ratification | 16/04/1928 | |
| Malta | Extension | 21/05/1964 | |
| MALTA | Succession | 04/01/1965 | |
| Mauritius | Extension | 09/09/1963 | |
| MAURITIUS | Ratification | 02/12/1969 | |
| Montserrat | Decision Resvd. | 04/02/1963 | |
| MOROCCO | Ratification | 14/10/1960 | |
| NETHERLANDS THE | Ratification | 06/02/1932 | |
| NETHERLANDS THE | Declaration | 13/07/1951 | |
| NETHERLANDS THE | Declaration | 01/01/1986 | |
| New Guinea | Extension | 21/06/1973 | |
| NEW ZEALAND | Ratification | 29/03/1938 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| Northern Rhodesia | Extension | 20/08/1963 | |
| NORWAY | Ratification | 23/11/1921 | |
| Papua | Extension | 21/06/1973 | |
| PAPUA NEW GUINEA | Succession | 01/05/1976 | |
| PARAGUAY | Ratification | 21/03/1966 | |
| POLAND | Ratification | 21/06/1924 | |
| ROMANIA | Ratification | 13/06/1921 | |
| Seychelles | Extension | 16/10/1964 | |
| Seychelles | Extension | 10/03/1965 | |
| SEYCHELLES | Succession | 06/02/1978 | 06/02/1978 |
| Singapore | Extension | 03/04/1963 | |
| SLOVENIA | Succession | 09/06/1992 | 09/06/1992 |
| Solomon Islands | Decision Resvd. | 15/01/1963 | |
| SOUTH AFRICA | Ratification | 20/02/1924 | |
| SPAIN | Ratification | 04/07/1923 | |
| St Helena | Extension | 08/02/1965 | |
| St Lucia | Decision Resvd. | 04/02/1963 | |
| SUDAN | Ratification | 18/06/1957 | |
| Swaziland | Decision Resvd. | 18/02/1963 | |
| Swaziland | Extension | 05/09/1966 | |
| SWAZILAND | Ratification | 05/09/1966 | |
| SWEDEN | Ratification | 27/09/1921 | |
| SWITZERLAND | Ratification | 09/10/1922 | |
| SYRIA | Ratification | 30/10/1961 | |
| The Gambia | Extension | 21/05/1964 | |
| TURKEY | Ratification | 14/07/1950 | |
| UKRAINE | Ratification | 16/05/1994 | 16/05/1994 |
| UNITED KINGDOM | Ratification | 14/07/1921 | |
| UNITED KINGDOM | Declaration | 14/07/1921 | |
| UNITED KINGDOM | Declaration | 15/01/1963 | |
| UNITED KINGDOM | Declaration | 04/02/1963 | |
| UNITED KINGDOM | Declaration | 18/02/1963 | |
| UNITED KINGDOM | Declaration | 07/03/1963 | |
| UNITED KINGDOM | Declaration | 03/04/1963 | |
| UNITED KINGDOM | Declaration | 08/05/1963 | |
| UNITED KINGDOM | Declaration | 27/06/1963 | |
| UNITED KINGDOM | Declaration | 20/08/1963 | |
| UNITED KINGDOM | Declaration | 22/08/1963 | |
| UNITED KINGDOM | Declaration | 09/09/1963 | |
| UNITED KINGDOM | Declaration | 21/05/1964 | |
| UNITED KINGDOM | Declaration | 07/07/1964 | |
| UNITED KINGDOM | Declaration | 03/08/1964 | |
| UNITED KINGDOM | Declaration | 16/10/1964 | |
| UNITED KINGDOM | Declaration | 24/11/1964 | |
| UNITED KINGDOM | Declaration | 08/02/1965 | |
| UNITED KINGDOM | Declaration | 10/03/1965 | |
| UNITED KINGDOM | Declaration | 05/09/1966 | |
| UNITED KINGDOM | Declaration | 11/01/1977 | |
| URUGUAY | Ratification | 06/06/1933 | |
| URUGUAY | Denunciation | 31/12/1982 | |
| VENEZUELA | Ratification | 20/11/1944 | |
| YUGOSLAVIA | Ratification | 01/04/1927 | |