| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BELGIUM | Signature | 13/12/1960 | |
| BELGIUM | Ratification | 14/03/1961 | |
| FRANCE | Definitive Signature | 13/12/1960 | |
| GERMANY | Definitive Signature | 13/12/1960 | |
| LUXEMBOURG | Definitive Signature | 13/12/1960 | |
| NETHERLANDS THE | Signature | 13/12/1960 | |
| NETHERLANDS THE | Ratification | 10/10/1962 | |
| UNITED KINGDOM | Signature | 13/12/1960 | |
| UNITED KINGDOM | Definitive Signature | 13/12/1960 |