| 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 |
|---|---|---|---|---|---|---|
| Belgium | 05-12-1956 | 03-05-1968 (R) | 01-07-1968 | |||
| France | 09-10-1956 | 10-04-1959 (R) | 01-06-1959 | |||
| Germany | 25-10-1956 | |||||
| Hungary | 31-10-1956 | |||||
| Italy | 01-11-1956 | 30-03-1966 (R) | 01-05-1966 | |||
| Luxembourg | 01-11-1956 | 27-10-1960 (R) | 01-12-1960 | |||
| Netherlands, the Kingdom of the | 12-10-1956 | 04-08-1958 (R) | 01-10-1958 | |||
| Poland | 26-10-1956 | 24-01-1958 (R) | 01-10-1958 | |||
| Spain | 01-05-1958 | |||||
| Switzerland | 29-10-1956 | |||||
| Türkiye | 30-10-1956 | 28-07-1961 (R) | 01-09-1961 | |||
| Yugoslavia (< 25-06-1991) | 28-11-1956 |
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