Changes to Council Directive 88/379/EEC of 7 June 1988 on the approximation of the laws, regulations and administrative provisions of the Member States relating to the classification, packaging and labelling of dangerous preparations
EU Directive 1988/379
Made by Commission Directive 93/18/EEC of 5 April 1993 adapting for the third time to technical progress Council Directive 88/379/EEC on the approximation of the laws, regulations and administrative provisions of the Member States relating to the classification, packaging and labelling of dangerous preparations
From legislation.gov.uk's record of changes, the official one: see it there.