| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Antilles | Extension | 07/09/1984 | 07/10/1984 |
| Aruba | Extension | 01/01/1986 | |
| AUSTRALIA | Accession | 26/01/1968 | |
| AUSTRIA | Signature | 18/04/1961 | |
| AUSTRIA | Ratification | 28/04/1966 | |
| BAHAMAS | Accession | 17/03/1977 | 16/04/1977 |
| BELGIUM | Signature | 23/10/1961 | |
| BELGIUM | Ratification | 02/05/1968 | |
| CAMBODIA | Accession | 31/08/1965 | |
| CENTRAL AFRICAN REPUBLIC | Signature | 28/03/1962 | |
| CENTRAL AFRICAN REPUBLIC | Ratification | 19/03/1973 | |
| COLOMBIA | Signature | 18/04/1961 | |
| COSTA RICA | Accession | 09/11/1964 | |
| DENMARK | Signature | 18/04/1961 | |
| DENMARK | Ratification | 02/10/1968 | |
| DOMINICA, COMMONWEALTH OF | Accession | 24/03/2006 | 23/04/2006 |
| DOMINICAN REPUBLIC | Signature | 30/03/1962 | |
| DOMINICAN REPUBLIC | Ratification | 13/02/1964 | |
| ECUADOR | Signature | 18/04/1961 | |
| ECUADOR | Ratification | 21/09/1964 | |
| FIJI | Succession | 21/06/1971 | 21/07/1971 |
| FINLAND | Signature | 20/10/1961 | |
| FINLAND | Ratification | 09/12/1969 | 08/01/1970 |
| FRANCE | Signature | 30/03/1962 | |
| FRANCE | Ratification | 31/12/1970 | |
| GABON | Accession | 02/04/1964 | |
| GERMANY FEDERAL REPUBLIC | Signature | 18/04/1961 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 11/11/1964 | |
| GHANA | Signature | 18/04/1961 | |
| GUINEA | Accession | 10/01/1968 | |
| ICELAND | Accession | 18/05/1971 | |
| INDIA | Accession | 15/10/1965 | |
| IRAN | Signature | 27/05/1961 | |
| IRAN | Ratification | 03/02/1965 | |
| IRAQ | Signature | 20/02/1962 | |
| IRAQ | Ratification | 15/10/1963 | |
| IRELAND, REPUBLIC OF | Signature | 18/04/1961 | |
| ISRAEL | Signature | 18/04/1961 | |
| ITALY | Signature | 13/03/1962 | |
| ITALY | Ratification | 25/06/1969 | |
| JAPAN | Signature | 26/03/1962 | |
| JAPAN | Ratification | 08/06/1964 | |
| KENYA | Accession | 01/07/1965 | |
| KOREA REPUBLIC OF | Signature | 30/03/1962 | |
| KOREA REPUBLIC OF | Ratification | 25/01/1977 | 24/02/1977 |
| Land Berlin | Extension | 11/11/1964 | |
| LAOS | Accession | 03/12/1962 | |
| LEBANON | Signature | 18/04/1961 | |
| LIBERIA | Accession | 16/09/2005 | 16/10/2005 |
| LIECHTENSTEIN | Signature | 18/04/1961 | |
| LIECHTENSTEIN | Ratification | 08/05/1964 | |
| LITHUANIA | Accession | 26/09/2012 | 26/10/2012 |
| LUXEMBOURG | Signature | 02/02/1962 | |
| LUXEMBOURG | Ratification | 17/08/1966 | |
| MADAGASCAR | Accession | 31/07/1963 | |
| MALAWI | Accession | 29/04/1980 | 29/05/1980 |
| MALAYSIA | Accession | 09/11/1965 | |
| MALTA | Succession | 07/03/1967 | 01/10/1964 |
| MAURITIUS | Succession | 18/07/1969 | 12/03/1968 |
| NEPAL | Accession | 28/09/1965 | |
| NETHERLANDS THE | Accession | 07/09/1984 | 07/10/1984 |
| NEW ZEALAND | Signature | 28/03/1962 | |
| NEW ZEALAND | Ratification | 23/09/1970 | |
| NIGER | Accession | 26/04/1966 | |
| NORWAY | Signature | 18/04/1961 | |
| NORWAY | Ratification | 24/10/1967 | |
| OMAN | Accession | 31/05/1974 | 30/06/1974 |
| PAKISTAN | Accession | 29/03/1976 | 28/04/1976 |
| PANAMA | Accession | 04/12/1963 | |
| PARAGUAY | Accession | 23/12/1969 | |
| PHILIPPINES | Signature | 20/10/1961 | |
| PHILIPPINES | Ratification | 15/11/1965 | |
| ROMANIA | Accession | 19/09/2007 | 19/10/2007 |
| SEYCHELLES | Accession | 29/05/1979 | 28/05/1979 |
| SPAIN | Accession | 21/09/2011 | 21/10/2011 |
| SRI LANKA | Accession | 31/07/1978 | 30/08/1978 |
| SWEDEN | Signature | 18/04/1961 | |
| SWEDEN | Ratification | 21/03/1967 | |
| SWITZERLAND | Signature | 18/04/1961 | |
| SWITZERLAND | Ratification | 22/11/1963 | |
| TAIWAN | Signature | 18/04/1961 | |
| TANZANIA | Signature | 27/02/1962 | |
| TANZANIA | Ratification | 05/11/1962 | |
| TUVALU | Declaration | 15/09/1982 | |
| UNITED KINGDOM | Signature | 11/12/1961 | |
| UNITED KINGDOM | Ratification | 01/09/1964 | |
| UNITED KINGDOM | Notification | 10/06/1997 | |
| UNITED STATES OF AMERICA | Signature | 29/06/1961 | |
| UNITED STATES OF AMERICA | Ratification | 13/11/1972 | 13/12/1972 |
| YUGOSLAVIA | Signature | 18/04/1961 | |
| YUGOSLAVIA | Ratification | 01/04/1963 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Succession | 12/03/2001 | 27/04/1992 |
| ZAMBIA | Accession | 19/07/1965 |