(23)The inclusion within the insurance cover of any passenger in the vehicle is a major achievement of the existing legislation. This objective would be placed in jeopardy if national legislation or any contractual clause contained in an insurance policy excluded passengers from insurance cover because they knew or should have known that the driver of the vehicle was under the influence of alcohol or of any other intoxicating agent at the time of the accident. The passenger is not usually in a position to assess properly the level of intoxication of the driver. The objective of discouraging persons from driving while under the influence of intoxicating agents is not achieved by reducing the insurance cover for passengers who are victims of motor vehicle accidents. Cover of such passengers under the vehicle’s compulsory motor insurance does not prejudge any liability they might incur pursuant to the applicable national legislation, nor the level of any award of damages in a specific accident.