Changes to Council Directive 93/12/EEC of 23 March 1993 relating to the sulphur content of certain liquid fuels
EU Directive 1993/12
Made by Directive 98/70/EC of the European Parliament and of the Council of 13 October 1998 relating to the quality of petrol and diesel fuels and amending Council Directive 93/12/EEC
From legislation.gov.uk's record of changes, the official one: see it there.