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| Portugal | March 2010 |
| Spain | March 2010 |
| Sweden | March 2010 |
| United Kingdom | March 2010 |
The following nineteen trading partners became parties to the WCT during June 2009-March 2010. Currently the WCT has 88 contracting parties.
| Country | Date of Entry Into Force |
| Austria | March 2010 |
| Bosnia and Herzegovina | November 2009 |
| Denmark | March 2010 |
| Estonia | March 2010 |
| European Union | March 2010 |
| Finland | March 2010 |
| France | March 2010 |
| Germany | March 2010 |
| Greece | March 2010 |
| Ireland | March 2010 |
| Italy | March 2010 |
| Luxembourg | March 2010 |
| Malta | March 2010 |
| Netherlands | March 2010 |
| Portugal | March 2010 |
| Spain | March 2010 |
| Sweden | March 2010 |
| United Kingdom | March 2010 |
| Uruguay | June 2009 |
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