Changes made by Council Directive 84/538/EEC of 17 September 1984 on the approximation of the laws of the Member States relating to the permissible sound power level of lawnmowers
EU Directive 1984/538
No changes made by Council Directive 84/538/EEC of 17 September 1984 on the approximation of the laws of the Member States relating to the permissible sound power level of lawnmowers are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.