Changes made by Council Directive 2006/104/EC of 20 November 2006 adapting certain Directives in the field of agriculture (veterinary and phytosanitary legislation), by reason of the accession of Bulgaria and Romania
EU Directive 2006/104
Made to Council Directive of 15 July 1991 concerning the placing of plant protection products on the market (91/414/EEC)
From legislation.gov.uk's record of changes, the official one: see it there.