Changes to Directive 98/8/EC of the European Parliament and of the Council of 16 February 1998 concerning the placing of biocidal products on the market
EU Directive 1998/8
Made by Commission Directive 2013/44/EU of 30 July 2013 amending Directive 98/8/EC of the European Parliament and of the Council to include powdered corn cob as an active substance in Annexes I and IA thereto
From legislation.gov.uk's record of changes, the official one: see it there.