Changes made by Commission Directive 85/406/EEC of 11 July 1985 adapting to technical progress Council Directive 84/533/EEC on the approximation of the laws of the Member States relating to the permissible sound power level of compressors
EU Directive 1985/406
Made to Council Directive 84/533/EEC of 17 September 1984 on the approximation of the laws of the Member States relating to the permissible sound power level of compressors
From legislation.gov.uk's record of changes, the official one: see it there.