http://www.legislation.gov.uk/eudr/1979/489Commission Directive 79/489/EEC of 18 April 1979 adapting to technical progress Council Directive 71/320/EEC on the approximation of the laws of the Member States relating to the braking devices of certain categories of motor vehicles and their trailersCommission Directive 79/489/EECenQueen's Printer of Acts of Parliament2019-09-09