| Party | Signature | Provisional application |
RatificationS=Signature without reservation or requirement of ratification R=Ratification, Acceptance, Approval or Notification A=Accession Su=Succession NK=Not Known | Entry into force | Renunciation | Termination |
|---|---|---|---|---|---|---|
| Austria | 20-10-1955 | 06-02-1961 (R) | 06-02-1961 | |||
| Belgium | 20-10-1955 | 22-02-1960 (R) | 22-02-1960 | |||
| Bosnia and Herzegovina | 19-09-1996 (A) | 19-09-1996 | ||||
| Bulgaria | 02-04-1998 (A) | 02-04-1998 | ||||
| Croatia | 10-03-1993 (A) | 10-03-1993 | ||||
| Czech Republic | 26-07-2002 (A) | 26-07-2002 | ||||
| Denmark | 20-10-1955 | 29-06-1956 (R) | 29-06-1956 | |||
| France | 20-10-1955 | 06-04-1959 (R) | 06-04-1959 | |||
| Germany | 20-10-1955 | 16-11-1956 (R) | 16-11-1956 | |||
| Greece | 16-08-1957 (A) | 16-08-1957 | ||||
| Hungary | 12-03-1991 (A) | 22-05-1991 | ||||
| Italy | 20-10-1955 | 22-06-1959 (R) | 22-06-1959 | |||
| Luxembourg | 20-10-1955 | 29-01-1957 (R) | 29-01-1957 | |||
| Montenegro | 01-09-2006 (A) | 17-10-2006 | ||||
| Netherlands, the Kingdom of the | 20-10-1955 | 28-05-1956 (R) | 28-05-1956 | |||
| North Macedonia | 27-11-1996 (A) | 27-11-1996 | ||||
| Norway | 20-10-1955 | 07-05-1956 (R) | 07-05-1956 | |||
| Portugal | 20-10-1955 | 25-07-1956 (R) | 25-07-1956 | |||
| Serbia | 12-03-2001 (Su) | 27-04-1992 | ||||
| Slovakia | 21-11-2000 (A) | 21-11-2000 | ||||
| Slovenia | 06-05-1993 (A) | 06-05-1993 | ||||
| Spain | 20-10-1955 | 18-03-1957 (R) | 18-03-1957 | |||
| Sweden | 20-10-1955 | 21-02-1956 (R) | 30-03-1956 | |||
| Switzerland | 20-10-1955 | 30-03-1956 (R) | 30-03-1956 | |||
| Türkiye | 18-03-1957 (A) | 18-03-1957 | ||||
| Yugoslavia (< 25-06-1991) | 20-10-1955 | 18-09-1956 (R) | 18-09-1956 |