Changes to Council Directive 92/24/EEC of 31 March 1992 relating to speed limitation devices or similar speed limitation on-board systems of certain categories of motor vehicles
EU Directive 1992/24
Made by Directive 2004/11/EC of the European Parliament and of the Council of 11 February 2004 amending Council Directive 92/24/EEC relating to speed limitation devices or similar speed limitation on-board systems of certain categories of motor vehicles
From legislation.gov.uk's record of changes, the official one: see it there.