| Contracting Parties | Signature | Ratification (Instrument deposited on) |
Entry into force |
| GERMANY | 06.09.1989 | 10.10.1994 | 01.01.1995 |
| AUSTRIA | 06.09.1989 | 26.07.1991 | 01.10.1991 |
| BELGIUM | 06.09.1989 | 02.06.1997 | 01.09.1997 |
| + SPAIN | 06.09.1989 | 14.06.1994 | 01.09.1994 |
| FRANCE | 06.09.1989 | 11.12.1990 | 01.03.1991 |
| ITALY | 06.09.1989 | 20.02.1992 | 01.05.1992 |
| LUXEMBOURG | 06.09.1989 | / | / |
| NETHERLANDS | 06.09.1989 | 09.07.1990 | 01.03.1991 |
| PORTUGAL | 06.09.1989 | / | / |
| TURKEY | 06.09.1989 | / | / |
| + accession |