European Union – Road transport. The Court of Justice of the European Union gave a preliminary ruling, deciding that Regulation (EC) No 561/2006 of the European Parliament and of the Council had to be interpreted as precluding national legislation which authorised, as a precautionary measure, the immobilisation of a vehicle owned by a transport undertaking in a situation where, first, the driver of that vehicle, employed by that undertaking, had driven it in breach of the provisions of Council Regulation (EEC) No 3821/85 and, second, the national competent authority had not established that that undertaking had been liable, since such a precautionary measure did not meet the requirements of the principle of proportionality.