Changes to Council Directive 92/109/EEC of 14 December 1992 on the manufacture and the placing on the market of certain substances used in the illicit manufacture of narcotic drugs and psychotropic substances
EU Directive 1992/109
Made by Commission Directive 2003/101/EC of 3 November 2003 amending Council Directive 92/109/EEC on the manufacture and placing on the market of certain substances used in the illicit manufacture of narcotic drugs and psychotropic substances
From legislation.gov.uk's record of changes, the official one: see it there.