| 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 | |||||
| Belgium | 20-10-1955 | |||||
| Denmark | 20-10-1955 | |||||
| France | 20-10-1955 | |||||
| Germany | 20-10-1955 | |||||
| Italy | 20-10-1955 | |||||
| Luxembourg | 20-10-1955 | |||||
| Netherlands, the Kingdom of the | 20-10-1955 | |||||
| Norway | 20-10-1955 | |||||
| Portugal | 20-10-1955 | |||||
| Spain | 20-10-1955 | |||||
| Sweden | 20-10-1955 | |||||
| Switzerland | 20-10-1955 | |||||
| Yugoslavia (< 25-06-1991) | 20-10-1955 |