According to the Court of Justice, in its judgment of 9 September 2003, in Case C-151/02, Jaeger, the Directive concerning certain aspects of the organisation of working time must be interpreted as meaning that on-call duty performed by a doctor where he is required to be physically present in the hospital must be regarded as constituting in its totality working time for the purposes of that Directive even where the person concerned is permitted to rest at his place of work during the periods when his services are not required, with the result that that Directive precludes legislation of a Member State which classifies as rest periods an employee’s periods of inactivity in the context of such on-call duty.