| Country | Action | Action Date | Effective Date |
|---|
| ARGENTINA | Signature | 01/07/1981 | |
| ARGENTINA | Ratification | 02/02/1987 | |
| ARGENTINA | Declaration | 02/02/1987 | |
| BAHAMAS | Signature | 01/07/1981 | |
| BELIZE | Signature | 01/07/1981 | |
| BRAZIL | Signature | 01/07/1981 | |
| CANADA | Signature | 01/07/1981 | |
| CHILE | Signature | 01/07/1981 | |
| COLOMBIA | Signature | 01/07/1981 | |
| COSTA RICA | Signature | 01/07/1981 | |
| DENMARK | Signature | 01/07/1981 | |
| ECUADOR | Signature | 01/07/1981 | |
| FRANCE | Signature | 01/07/1981 | |
| GRENADA | Signature | 01/07/1981 | |
| GUYANA | Signature | 01/07/1981 | |
| JAMAICA | Signature | 01/07/1981 | |
| MEXICO | Signature | 01/07/1981 | |
| NETHERLANDS THE | Signature | 01/07/1981 | |
| NICARAGUA | Signature | 01/07/1981 | |
| PANAMA | Signature | 01/07/1981 | |
| PARAGUAY | Signature | 01/07/1981 | |
| PERU | Signature | 01/07/1981 | |
| SURINAME | Accession | 21/10/1985 | |
| TRINIDAD AND TOBAGO | Signature | 01/07/1981 | |
| UNITED KINGDOM | Signature | 01/07/1981 | |
| UNITED KINGDOM | Notification | 09/09/1987 | |
| UNITED STATES OF AMERICA | Signature | 01/07/1981 | |
| URUGUAY | Signature | 01/07/1981 | |
| VENEZUELA | Signature | 01/07/1981 | |