Changes made by Regulation (EU) No 1251/2011 amending Directives 2004/17/EC, 2004/18/EC and 2009/81/EC of the European…
EU Regulation No 1251/2011
Made to Directive 2004/17/EC of the European Parliament and of the Council of 31 March 2004 coordinating the procurement procedures of entities operating in the water, energy, transport and postal services sectors
From legislation.gov.uk's record of changes, the official one: see it there.