Memorandum of Understanding concerning Conservation Measures for the Aquatic Warbler (Acrocephalus paludicola) (April 30, 2003) Countries/Territories Entry into force Simple signature Belgium Nov 24, 2005 Nov 24, 2005 Belarus Apr 30, 2003 Apr 30, 2003 Bulgaria Apr 30, 2003 Apr 30, 2003 United Kingdom Apr 30, 2003 Apr 30, 2003 Germany Apr 30, 2003 Apr 30, 2003 Hungary Apr 30, 2003 Apr 30, 2003 Latvia Apr 30, 2003 Apr 30, 2003 Lithuania Apr 30, 2003 Apr 30, 2003 Poland Jul 13, 2004 Jul 13, 2004 Senegal Apr 30, 2003 Apr 30, 2003 Spain Apr 30, 2003 Apr 30, 2003 Ukraine May 21, 2003 May 21, 2003 France May 14, 2010 May 14, 2010 Mali May 14, 2010 May 14, 2010 Switzerland Nov 22, 2011 Nov 22, 2011 Luxembourg Jul 19, 2010 Jul 19, 2010