6. Regulations

Directive 2005/55/EC of the European Parliament and of the Council of September 28, 2005 on the approximation of the laws of the Member States relating to the measures to be taken against the emission of gaseous and particulate pollutants from compression-ignition engines for use in vehicles, and the emission of gaseous pollutants from positive-ignition engines fuelled with natural gas or liquefied petroleum gas for use in vehicles (OJ L 275, October 20, 2005, pp. 1-163).