| 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 | 20-09-1951 | 18-02-1955 (R) | 18-02-1955 | |||
| Bulgaria | 12-07-2004 | 22-10-2004 (R) | 22-10-2004 | |||
| Canada | 20-09-1951 | 01-09-1954 (R) | 01-09-1954 | |||
| Czech Republic | 26-04-1999 | 18-11-1999 (R) | 18-11-1999 | |||
| Denmark | 20-09-1951 | 07-05-1952 (R) | 18-05-1954 | |||
| Estonia | 07-09-2004 | 26-11-2004 (R) | 26-11-2004 | |||
| France | 20-09-1951 | 20-01-1955 (R) | 20-01-1955 | |||
| Germany | 29-05-1956 | 25-07-1958 (R) | 25-07-1958 | |||
| Greece | 06-05-1955 | 10-12-1956 (R) | 10-12-1956 | |||
| Hungary | 21-01-2000 | 15-05-2000 (R) | 15-05-2000 | |||
| Iceland | 20-09-1951 | 11-05-1953 (R) | 18-05-1954 | |||
| Italy | 20-09-1951 | 09-03-1955 (R) | 09-03-1955 | |||
| Latvia | 10-08-2004 | 17-02-2005 (R) | 17-02-2005 | |||
| Lithuania | 08-09-2004 | 03-01-2005 (R) | 03-01-2005 | |||
| Luxembourg | 20-09-1951 | 23-07-1954 (R) | 23-07-1954 | |||
| Montenegro | 27-09-2017 | |||||
| Netherlands, the Republic of the Seven United | 20-09-1951 | 14-07-1952 (R) | 18-05-1954 | |||
| Norway | 20-09-1951 | 24-02-1953 (R) | 18-05-1954 | |||
| Poland | 21-09-1999 | 21-09-1999 (R) | 21-09-1999 | |||
| Portugal | 20-09-1951 | 22-11-1955 (R) | 22-11-1955 | |||
| Romania | 30-06-2004 | 05-01-2005 (R) | 05-01-2005 | |||
| Slovakia | 13-08-2004 | 16-12-2004 (R) | 16-12-2004 | |||
| Slovenia | 14-06-2004 | 28-09-2004 (R) | 28-09-2004 | |||
| Spain | 04-03-1987 | 10-08-1987 (R) | 10-08-1987 | |||
| Turkey | 02-10-1953 | 18-05-1954 (R) | 18-05-1954 | |||
| United Kingdom | 20-09-1951 | 10-12-1954 (R) | 10-12-1954 | |||
| United States of America | 20-09-1951 | 24-07-1953 (R) | 18-05-1954 |
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