| Country | Action | Action Date | Effective Date |
|---|
| Akrotiri & Dhekelia | Extension | 05/07/1984 | |
| Anguilla | Extension | 05/07/1984 | |
| ARGENTINA | Signature | 14/03/1990 | |
| ARGENTINA | Ratification | 14/03/1990 | |
| ARGENTINA | Declaration | 14/03/1990 | |
| AUSTRALIA | Signature | 24/04/1991 | |
| BARBADOS | Signature | 25/09/1975 | |
| BELGIUM | Signature | 25/09/1975 | |
| Bermuda | Extension | 05/07/1984 | |
| BRAZIL | Signature | 25/09/1975 | |
| BRAZIL | Ratification | 27/07/1979 | |
| BRAZIL | Reservation | 27/07/1979 | |
| British Antarctic Territory | Extension | 05/07/1984 | |
| British Indian Ocean Territory | Extension | 05/07/1984 | |
| British Virgin Islands | Extension | 05/07/1984 | |
| CANADA | Signature | 31/12/1975 | |
| Cayman Islands | Extension | 05/07/1984 | |
| CHILE | Signature | 23/11/1984 | |
| COLOMBIA | Signature | 20/05/1982 | |
| COLOMBIA | Ratification | 20/05/1982 | |
| CYPRUS | Signature | 10/11/1992 | 10/11/1992 |
| DENMARK | Signature | 01/12/1976 | |
| ESTONIA | Signature | 25/11/1997 | |
| ESTONIA | Ratification | 16/03/1998 | 14/06/1998 |
| ETHIOPIA | Signature | 14/07/1987 | |
| ETHIOPIA | Ratification | 14/07/1987 | |
| Falkland Island Dependencies | Extension | 05/07/1984 | |
| Falkland Islands | Extension | 05/07/1984 | |
| FINLAND | Signature | 02/05/1978 | |
| FRANCE | Signature | 30/12/1975 | |
| GHANA | Signature | 25/09/1975 | |
| GHANA | Ratification | 11/08/1997 | 09/11/1997 |
| Gibraltar | Extension | 05/07/1984 | |
| GREECE | Signature | 10/11/1988 | 12/11/1988 |
| GUATEMALA | Signature | 25/09/1975 | |
| Guernsey | Extension | 05/07/1984 | |
| Hong Kong | Extension | 05/07/1984 | |
| HUNGARY | Signature | 29/06/1987 | |
| HUNGARY | Ratification | 30/06/1987 | |
| IRELAND, REPUBLIC OF | Signature | 27/06/1989 | 27/06/1989 |
| Isle of Man | Extension | 05/07/1984 | |
| ISRAEL | Signature | 27/11/1987 | |
| ISRAEL | Ratification | 16/02/1988 | |
| ITALY | Signature | 15/05/1978 | |
| ITALY | Ratification | 02/04/1985 | |
| Jersey | Extension | 05/07/1984 | |
| KUWAIT | Signature | 21/03/1995 | |
| KUWAIT | Ratification | 08/11/1996 | |
| LEBANON | Accession | 04/08/2000 | |
| MEXICO | Signature | 21/12/1983 | 18/05/1984 |
| Montserrat | Extension | 05/07/1984 | |
| MOROCCO | Signature | 18/10/1984 | |
| Netherlands Antilles | Extension | 07/01/1983 | |
| NETHERLANDS THE | Signature | 19/05/1982 | |
| NETHERLANDS THE | Ratification | 07/01/1983 | |
| NORWAY | Signature | 21/10/1977 | |
| Pitcairn Islands | Extension | 05/07/1984 | |
| PORTUGAL | Signature | 25/09/1975 | |
| PORTUGAL | Ratification | 07/04/1982 | |
| Sovereign Base Areas | Extension | 05/07/1984 | |
| SPAIN | Signature | 19/11/1987 | |
| SPAIN | Ratification | 20/07/1989 | |
| St Helena | Extension | 05/07/1984 | |
| St Helena And Dependencies | Extension | 05/07/1984 | |
| SWEDEN | Signature | 12/12/1977 | |
| SWEDEN | Ratification | 04/05/1988 | |
| SWITZERLAND | Signature | 25/09/1975 | |
| SWITZERLAND | Ratification | 09/12/1987 | |
| TOGO | Signature | 21/08/1985 | |
| TOGO | Ratification | 05/05/1987 | |
| Turks And Caicos Islands | Extension | 05/07/1984 | |
| UNITED KINGDOM | Signature | 25/09/1975 | |
| UNITED KINGDOM | Ratification | 05/07/1984 | |
| UNITED STATES OF AMERICA | Signature | 25/09/1975 | |
| VENEZUELA | Signature | 25/09/1975 | |