| Austria |
|
Accession : January 1, 1995 |
January 1, 1995 |
|
| Belgium |
March 25, 1957 |
Ratification : December 2, 1957 |
January 1, 1958 |
|
| Bulgaria |
|
Accession : January 1, 2007 |
January 1, 2007 |
|
| Croatia |
|
Accession : January 1, 2013 |
January 1, 2013 |
|
| Cyprus |
|
Accession : May 1, 2004 |
May 1, 2004 |
|
| Czech Republic |
|
Accession : May 1, 2004 |
May 1, 2004 |
|
| Denmark |
|
Accession : January 1, 1973 |
January 1, 1973 |
|
| Estonia |
|
Accession : May 1, 2004 |
May 1, 2004 |
|
| Finland |
|
Accession : January 1, 1995 |
January 1, 1995 |
|
| France |
March 25, 1957 |
Ratification : August 2, 1957 |
January 1, 1958 |
|
| Germany |
March 25, 1957 |
Ratification : July 27, 1957 |
January 1, 1958 |
|
| Greece |
|
Accession : January 1, 1981 |
January 1, 1981 |
|
| Hungary |
|
Accession : May 1, 2004 |
May 1, 2004 |
|
| Ireland |
|
Accession : January 1, 1973 |
January 1, 1973 |
|
| Italy |
March 25, 1957 |
Ratification : October 14, 1957 |
January 1, 1958 |
|
| Latvia |
|
Accession : May 1, 2004 |
May 1, 2004 |
|
| Lithuania |
|
Accession : May 1, 2004 |
May 1, 2004 |
|
| Luxembourg |
March 25, 1957 |
Ratification : November 30, 1957 |
January 1, 1958 |
|
| Malta |
|
Accession : May 1, 2004 |
May 1, 2004 |
|
| Netherlands (Kingdom of the) |
March 25, 1957 |
Ratification : December 5, 1957 |
January 1, 1958 |
|
| Poland |
|
Accession : May 1, 2004 |
May 1, 2004 |
|
| Portugal |
|
Accession : January 1, 1986 |
January 1, 1986 |
|
| Romania |
|
Accession : January 1, 2007 |
January 1, 2007 |
|
| Slovakia |
|
Accession : May 1, 2004 |
May 1, 2004 |
|
| Slovenia |
|
Accession : May 1, 2004 |
May 1, 2004 |
|
| Spain |
|
Accession : January 1, 1986 |
January 1, 1986 |
|
| Sweden |
|
Accession : January 1, 1995 |
January 1, 1995 |
|