| Country | Action | Action Date | Effective Date |
|---|
| ANTIGUA AND BARBUDA | Signature | 11/10/1983 | |
| ANTIGUA AND BARBUDA | Ratification | 11/10/1983 | |
| ARGENTINA | Signature | 27/06/1967 | |
| ARGENTINA | Ratification | 18/01/1994 | |
| ARGENTINA | Declaration | 18/01/1994 | |
| BAHAMAS | Declaration | 01/01/1905 | |
| BAHAMAS | Signature | 29/11/1976 | |
| BAHAMAS | Ratification | 26/04/1977 | |
| BARBADOS | Signature | 18/10/1968 | |
| BARBADOS | Ratification | 25/04/1969 | |
| BELIZE | Statement | 01/01/1905 | |
| BELIZE | Signature | 14/02/1992 | |
| BELIZE | Ratification | 09/11/1994 | |
| BOLIVIA | Signature | 14/02/1967 | |
| BOLIVIA | Ratification | 18/02/1969 | |
| BOLIVIA | Declaration | 18/02/1969 | |
| BRAZIL | Signature | 09/05/1967 | |
| BRAZIL | Ratification | 29/01/1968 | |
| BRAZIL | Declaration | 19/12/1983 | |
| BRAZIL | Statement | 30/05/1994 | |
| CHILE | Signature | 14/02/1967 | |
| CHILE | Ratification | 09/10/1974 | |
| CHILE | Statement | 18/01/1994 | |
| COLOMBIA | Signature | 14/02/1967 | |
| COLOMBIA | Ratification | 04/08/1972 | 06/09/1972 |
| COLOMBIA | Notification | 04/08/1972 | |
| COLOMBIA | Ratification | 18/01/1999 | |
| COSTA RICA | Signature | 14/02/1967 | |
| COSTA RICA | Ratification | 25/08/1969 | |
| COSTA RICA | Ratification | 15/02/1999 | |
| CUBA | Signature | 25/03/1995 | |
| CUBA | Declaration | 25/03/1995 | |
| CUBA | Ratification | 25/03/1995 | |
| DOMINICA, COMMONWEALTH OF | Signature | 02/05/1959 | |
| DOMINICA, COMMONWEALTH OF | Ratification | 04/06/1993 | |
| DOMINICA, COMMONWEALTH OF | Statement | 25/08/1993 | |
| DOMINICAN REPUBLIC | Signature | 28/07/1967 | |
| DOMINICAN REPUBLIC | Ratification | 14/06/1968 | |
| ECUADOR | Signature | 14/02/1967 | |
| ECUADOR | Ratification | 11/02/1969 | |
| ECUADOR | Approval | 30/08/2000 | |
| EL SALVADOR | Signature | 14/02/1967 | |
| EL SALVADOR | Ratification | 22/04/1968 | |
| GRENADA | Signature | 29/04/1975 | |
| GRENADA | Ratification | 20/06/1975 | |
| GUATEMALA | Signature | 14/02/1967 | |
| GUATEMALA | Ratification | 06/02/1970 | |
| GUYANA | Statement | 01/01/1905 | |
| GUYANA | Signature | 16/01/1995 | |
| GUYANA | Ratification | 16/01/1995 | |
| HAITI | Signature | 14/02/1967 | |
| HAITI | Ratification | 23/05/1969 | |
| HONDURAS | Signature | 14/02/1967 | |
| HONDURAS | Ratification | 23/09/1968 | |
| JAMAICA | Signature | 26/10/1967 | |
| JAMAICA | Ratification | 26/10/1967 | |
| MEXICO | Signature | 14/02/1967 | |
| MEXICO | Ratification | 20/09/1967 | |
| MEXICO | Notification | 26/03/1984 | |
| MEXICO | Notification | 17/12/1984 | |
| NICARAGUA | Signature | 15/02/1967 | |
| NICARAGUA | Ratification | 24/10/1968 | |
| PANAMA | Declaration | 01/01/1905 | |
| PANAMA | Signature | 14/02/1967 | |
| PANAMA | Ratification | 11/06/1971 | |
| PARAGUAY | Signature | 26/04/1967 | |
| PARAGUAY | Ratification | 19/03/1969 | |
| PERU | Signature | 14/02/1967 | |
| PERU | Ratification | 04/03/1969 | |
| SAINT LUCIA | Signature | 25/08/1992 | |
| SAINT LUCIA | Ratification | 10/04/2014 | |
| ST KITTS AND NEVIS | Signature | 18/02/1994 | |
| SURINAME | Signature | 13/02/1976 | |
| SURINAME | Ratification | 10/06/1977 | |
| TRINIDAD AND TOBAGO | Signature | 27/06/1967 | 03/12/1970 |
| TRINIDAD AND TOBAGO | Ratification | 03/12/1970 | |
| URUGUAY | Signature | 14/02/1967 | |
| URUGUAY | Ratification | 20/08/1968 | |
| VENEZUELA | Signature | 14/02/1967 | |
| VENEZUELA | Ratification | 23/03/1970 | |