| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Antigua | Extension | 16/04/1964 | |
| Aruba | Extension | 01/01/1986 | 01/04/1986 |
| AUSTRALIA | Accession | 18/04/1973 | 17/07/1973 |
| BELGIUM | Signature | 23/11/1957 | |
| BELGIUM | Ratification | 16/05/1960 | |
| BOSNIA AND HERZEGOVINA | Succession | 01/10/1993 | |
| British Guiana | Extension | 16/04/1964 | |
| British Honduras | Extension | 21/07/1961 | 27/12/1961 |
| British Solomon Islands | Extension | 21/07/1961 | 27/12/1961 |
| British Virgin Islands | Extension | 03/07/1964 | 06/10/1964 |
| Brunei | Extension | 16/04/1964 | |
| CANADA | Accession | 30/05/1969 | |
| Caribbean part of the Netherlands | Extension | 10/10/2010 | 10/10/2010 |
| DENMARK | Signature | 23/11/1957 | 02/09/1959 |
| Dominica | Extension | 21/07/1961 | 27/12/1961 |
| Falkland Islands | Extension | 21/07/1961 | 27/12/1961 |
| Fiji | Extension | 21/07/1961 | 27/12/1961 |
| FIJI | Succession | 20/03/1972 | |
| FIJI | Denunciation | 20/03/1972 | 20/03/1973 |
| FRANCE | Signature | 23/11/1957 | |
| FRANCE | Ratification | 20/06/1958 | |
| GERMANY FEDERAL REPUBLIC | Signature | 23/11/1957 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 28/09/1961 | |
| Gilbert And Ellice Islands | Extension | 21/07/1961 | 27/12/1961 |
| Grenada | Extension | 21/07/1961 | 27/12/1961 |
| Guernsey | Extension | 14/10/1959 | 27/12/1961 |
| IRELAND, REPUBLIC OF | Accession | 21/04/1964 | |
| Isle of Man | Extension | 14/10/1959 | 27/12/1961 |
| ITALY | Accession | 31/10/1966 | |
| ITALY | Statement | 31/10/1966 | |
| Jamaica | Extension | 21/07/1961 | 27/12/1961 |
| Jersey | Extension | 14/10/1959 | 27/12/1961 |
| Land Berlin | Extension | 28/09/1961 | |
| Mauritius | Extension | 21/07/1961 | 27/12/1961 |
| MAURITIUS | Succession | 24/08/1970 | |
| MONACO | Accession | 11/04/1960 | |
| Montserrat | Extension | 16/04/1964 | |
| MOROCCO | Accession | 20/05/1959 | |
| NETHERLANDS THE | Signature | 23/11/1957 | |
| NETHERLANDS THE | Ratification | 27/08/1959 | |
| New Guinea | Extension | 18/04/1973 | 17/07/1973 |
| NEW ZEALAND | Accession | 21/10/1974 | |
| NEW ZEALAND | Declaration | 21/10/1974 | |
| Norfolk Island | Extension | 18/04/1973 | 17/07/1973 |
| NORWAY | Signature | 23/11/1957 | |
| NORWAY | Ratification | 28/05/1959 | |
| Papua | Extension | 18/04/1973 | 17/07/1973 |
| PORTUGAL | Accession | 03/03/1965 | |
| PORTUGAL | Statement | 03/03/1965 | |
| Seychelles | Extension | 21/07/1961 | 27/12/1961 |
| SLOVENIA | Succession | 16/06/1993 | |
| St Helena | Extension | 21/07/1961 | 27/12/1961 |
| St Kitts Nevis Anguilla | Extension | 16/04/1964 | |
| St Lucia | Extension | 16/04/1964 | |
| St Vincent | Extension | 21/07/1961 | 27/12/1961 |
| SWEDEN | Signature | 23/11/1957 | |
| SWEDEN | Ratification | 28/05/1959 | |
| SWITZERLAND | Accession | 12/12/1962 | |
| The Gambia | Extension | 21/07/1961 | 27/12/1961 |
| UNITED KINGDOM | Signature | 23/11/1957 | |
| UNITED KINGDOM | Ratification | 09/08/1958 | |
| YUGOSLAVIA | Accession | 04/12/1963 |