Communication from the Commission to the European Parliament pursuant to the second subparagraph of Article 251 (2) of the EC-Treaty concerning the Common Position adopted by the Council on 21.5.1999 with a view to the adoption of a European Parliament and Council Directive on the approximation of the laws of the Member States relating to insurance against civil liability in respect of the use of motor vehicles and amending Directives 73/239/EEC and 88/357/EEC (Fourth Motor Insurance Directive)