More generally it deals with the citizens' rights of free movement, which form the basis of the European Project.

The Polish government replied to the committee clarifying and reiterating its position on the registration of right hand drive vehicles.

The letter indicated that the commission would wait two months for a remedy of the deficiencies in Polish law after which it would refer the matter to the European Court of Justice in Luxembourg.

"The Commission considers that if a motor vehicle meets EU type-approval, it can be safe to drive in all Member States, irrespective of the adjustment to the right or left-hand traffic.

"[6] On 8 June 2012 the President of the Court of Justice of the European Union granted leave to intervene to the Republic of Lithuania.

[13] Initially the Polish Government gave indications to the Commission that they would comply with the court's judgement by the end of 2014.