| Country | Action | Action Date | Effective Date |
|---|
| Aruba | Extension | 02/07/1986 | |
| BELGIUM | Signature | 27/09/1968 | |
| BELGIUM | Ratification | 16/02/1971 | |
| FRANCE | Signature | 27/09/1968 | |
| FRANCE | Ratification | 13/04/1970 | |
| GERMANY FEDERAL REPUBLIC | Signature | 27/09/1968 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 30/10/1972 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 30/10/1972 | |
| ITALY | Signature | 27/09/1968 | |
| ITALY | Ratification | 11/08/1972 | |
| LUXEMBOURG | Signature | 27/09/1968 | |
| LUXEMBOURG | Ratification | 22/11/1972 | |
| NETHERLANDS THE | Signature | 27/09/1968 | |
| NETHERLANDS THE | Ratification | 26/06/1972 | |
| NETHERLANDS THE | Declaration | 02/07/1986 | |