46In the first place, it is settled case-law that on-call duty performed by a worker where he is required to be physically present on the employer's premises must be regarded in its entirety as working time within the meaning of Directive 93/104, regardless of the work actually done by the person concerned during that on-call duty (see Simap, paragraph 52; Jaeger, paragraphs 71, 75 and 103; Pfeiffer and Others, paragraph 93; and the order in Case C-241/99 CIG [2001] ECR I-5139, paragraph 34).
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