http://www.legislation.gov.uk/eudr/1978/1015/adoptedCouncil Directive 78/1015/EEC of 23 November 1978 on the approximation of the laws of the Member States on the permissible sound level and exhaust system of motorcyclesCouncil Directive 78/1015/EECenQueen's Printer of Acts of Parliament2019-09-12