| Contracting Parties | Signature | Ratification (Instrument deposited on) |
Entry into force |
| GERMANY | 10.09.1970 | / | / |
| AUSTRIA | 10.09.1970 | 28.04.1975 | 08.02.1976 |
| BELGIUM | 10.09.1970 | / | / |
| FRANCE | 10.09.1970 | 09.01.1976 | 08.02.1976 |
| GREECE | 10.09.1970 | 22.01.1987 | 21.02.1987 |
| ITALY | 10.09.1970 | 06.07.1978 | 05.08.1978 |
| LUXEMBOURG | 10.09.1970 | 11.07.1983 | 10.08.1983 |
| NETHERLANDS | 10.09.1970 | 01.07.1977 | 31.07.1977 |
| SWITZERLAND | 10.09.1970 | / | / |
| TURKEY | 10.09.1970 | 02.04.1976 | 31.07.1976 |