| Member State | Entry into force | Declaration/Reservation | Observations |
 Austria | 23 Aug 2005 | Declaration | |
 Belgium | 23 Aug 2005 | Declaration | |
 Bulgaria | 1 Dec 2007 | Declaration | Adhésion/Accession |
 Croatia | | | |
 Cyprus | 1 Feb 2006 | Declaration | Adhésion/Accession |
 Czech Republic | 12 Jun 2006 | Declaration | Adhésion/Accession |
 Denmark | 23 Aug 2005 | Declaration | |
 Estonia | 23 Aug 2005 | Declaration | Adhésion/Accession |
 Finland | 23 Aug 2005 | Declaration | |
 France | 23 Aug 2005 | Declaration | |
 Germany | 2 Feb 2006 | Declaration | |
 Greece | | | |
 Hungary | 23 Nov 2005 | Declaration | Adhésion/Accession |
 Ireland | 23 Aug 2020 | Declaration | |
 Italy | 22 Feb 2018 | Declaration / Reservation | |
 Latvia | 23 Aug 2005 | Declaration | Adhésion/Accession |
 Lithuania | 23 Aug 2005 | Declaration | Adhésion/Accession |
 Luxembourg | 6 Mar 2011 | Declaration | |
 Malta | 3 Jul 2008 | Declaration | Adhésion/Accession |
 Netherlands | 23 Aug 2005 | Declaration | |
 Poland | 26 Oct 2005 | Declaration/Reservation | Adhésion/Accession |
 Portugal | 23 Aug 2005 | Declaration | |
 Romania | 1 Dec 2007 | Declaration | Adhésion/Accession |
 Slovakia | 1 Oct 2006 | Declaration | Adhésion/Accession |
 Slovenia | 26 Sep 2005 | Declaration | Adhésion/Accession |
 Spain | 23 Aug 2005 | Declaration | |
 Sweden | 5 Oct 2005 | Declaration | |
 United Kingdom | 21 Dec 2005 | Declaration | |