23The referring court does not share that view. It points out that in the light of the Court of Justice's decision on Article 7 of Directive 93/104 in Case C-173/99 BECTU [2001] ECR I-4881, its decision on Article 8 of Directive 92/85 in Case C-411/96 Boyle and Others [1998] ECR I-6401 and its decision on Directive 76/207 in Case C-136/95 Thibault [1998] ECR I-2011, the principle of equality of treatment for and nondiscrimination of women who are pregnant or breastfeeding means that a worker must be able to take her annual leave during a period other than the period of her maternity leave, if the dates of annual leave, fixed in advance by a collective agreement between the undertaking and the workers' representatives, coincide with those of her maternity leave. Allowing the two periods of leave to overlap would entail one of them being lost, in this case the annual holiday.
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