| Country | Action | Action Date | Effective Date |
|---|
| ALGERIA | Ratification | 19/10/1962 | |
| American Samoa | Extension | 07/06/1961 | |
| ANGOLA | Succession | 04/06/1976 | |
| Anguilla | Decision Resvd. | 08/03/1961 | |
| Antilles | Extension | 14/07/1950 | |
| Aruba | App without mod | 01/01/1986 | 01/01/1986 |
| BARBADOS | Ratification | 08/05/1967 | |
| BELGIUM | Ratification | 05/12/1951 | |
| Bermuda | Decision Resvd. | 08/03/1961 | |
| BOSNIA AND HERZEGOVINA | Ratification | 02/06/1993 | 02/06/1993 |
| British Virgin Islands | Decision Resvd. | 08/03/1961 | |
| CANADA | Signature | 29/06/1946 | |
| CANADA | Ratification | 19/03/1951 | |
| Canal Zone | Extension | 07/06/1961 | |
| CHINA | Declaration | 20/10/1999 | |
| CROATIA | Ratification | 08/10/1991 | 08/10/1991 |
| Falkland Islands | Decision Resvd. | 08/03/1961 | |
| FRANCE | Signature | 29/06/1946 | |
| FRANCE | Ratification | 09/12/1948 | |
| GHANA | Ratification | 18/03/1965 | 18/03/1966 |
| Gibraltar | Decision Resvd. | 08/03/1961 | |
| Guernsey | Extension | 03/12/1956 | |
| GUINEA BISSAU | Succession | 21/02/1977 | |
| Hong Kong | Extension | 02/02/1979 | |
| IRELAND, REPUBLIC OF | Ratification | 21/06/1957 | |
| Isle of Man | Extension | 03/12/1956 | |
| ITALY | Ratification | 23/06/1981 | 23/06/1982 |
| Jersey | Extension | 03/12/1956 | |
| LEBANON | Ratification | 06/12/1993 | 06/12/1994 |
| LUXEMBOURG | Ratification | 15/02/1991 | 15/02/1992 |
| MALTA | Ratification | 19/09/2002 | 19/09/2003 |
| MAURITIUS | Ratification | 02/12/1969 | |
| Montserrat | Decision Resvd. | 08/03/1961 | |
| NETHERLANDS THE | Signature | 29/06/1946 | |
| NETHERLANDS THE | Ratification | 14/07/1950 | |
| NEW ZEALAND | Ratification | 05/12/1961 | |
| PANAMA | Ratification | 04/06/1971 | |
| POLAND | Ratification | 13/04/1954 | |
| PORTUGAL | Ratification | 13/06/1952 | |
| PORTUGAL | Declaration | 04/10/1999 | |
| SLOVENIA | Ratification | 09/06/1992 | 09/06/1992 |
| Southern And Antarctic Territories | App without mod | 01/01/1900 | |
| SPAIN | Ratification | 05/05/1971 | |
| St Helena | Decision Resvd. | 08/03/1961 | |
| Trust Territories Of The Pacific Islands | Extension | 07/06/1961 | 01/01/1900 |
| UNITED ARAB REPUBLIC | Ratification | 30/03/1967 | |
| UNITED KINGDOM | Signature | 29/06/1946 | |
| UNITED KINGDOM | Ratification | 13/05/1952 | |
| UNITED STATES OF AMERICA | Signature | 29/06/1946 | |
| UNITED STATES OF AMERICA | Ratification | 09/04/1953 | |
| YUGOSLAVIA | Ratification | 22/12/1961 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Ratification | 24/11/2000 | 24/11/2000 |