Commission Directive of 13 April 1981 adapting to technical progress Council Directive 70/157/EEC on the approximation of the laws of the Member States relating to the permissible sound level and the exhaust system of motor vehicles
Direktiva Komisije z dne 13. aprila 1981, ki tehničnemu napredku prilagaja Direktivo Sveta 70/157/EGS o približevanju zakonodaje držav članic o dovoljeni ravni hrupa in izpušnem sistemu motornih vozil