| State | Signature | Instrument of accession | Date of deposit | Entry into force |
| Belgium | 21 May 2003 | Ratification | 5 August 2005 | 4 September 2005 |
| Denmark | 21 May 2003 | Approval | 16 December 2003 | 14 April 2004 |
| Finland | 21 May 2003 | Acceptance | 10 December 2004 | 9 January 2005 |
| France | 21 May 2003 | Approval | 23 November 2004 | 23 December 2004 |
| Germany | 21 May 2003 | Ratification | 15 April 2005 | 15 May 2005 |
| Netherlands | 21 May 2003 | Acceptance | 2 February 2005 | 4 March 2005 |
| Norway | 21 May 2003 | Approval | 16 October 2003 | 14 April 2004 |
| Russian Federation | 21 May 2003 | Ratification | 15 March 2004 | 14 April 2004 |
| Sweden | 21 May 2003 | Ratification | 11 July 2003 | 14 April 2004 |
| United Kingdom | 21 May 2003 | Ratification | 6 April 2006 | 6 May 2006 |
| United States* | 21 May 2003 | Acceptance | 15 May 2013 | 14 June 2013 |
| European Atomic Energy Community | 21 May 2003 | Conclusion | 22 February 2008 | 23 March 2008 |
| European Community | 21 May 2003 | Conclusion | 26 June 2007 | 26 July 2007 |
| European Bank for Reconstruction and Development (EBRD) | Accession | 4 March 2004 | 14 April 2004 | |
| Nordic Environment Finance Corporation (NEFCO) | Accession | 19 January 2005 | 12 January 2006 |
* The United States only signed the Framework Agreement on a Multilateral Nuclear Environmental Programme in the Russian Federation and not the Protocol.
Last updated: 5 May 2014
