Changes to Council Directive of 20 March 1970 on the approximation of the laws of the Member States on measures to be taken against air pollution by emissions from motor vehicles (70/220/EEC)
EU Directive 1970/220
Made by Commission Directive 2003/76/EC of 11 August 2003 amending Council Directive 70/220/EEC relating to measures to be taken against air pollution by emissions from motor vehicles
From legislation.gov.uk's record of changes, the official one: see it there.