31Lastly, as regards whether, for the purpose of calculating the thresholds laid down in Article 1(1)(a) (i) and (ii) of Directive 98/59, such workers may be regarded as ‘normally’ employed at the establishment concerned within the meaning of that provision, it should be noted that that directive cannot be interpreted as meaning that the methods of calculating those thresholds, and therefore the thresholds themselves, are within the discretion of the Member States, as such an interpretation would allow the latter to alter the scope of that directive and thus to deprive it of its full effect (judgment in Confédération générale du travail and Others, C‑385/05, EU:C:2007:37, paragraph 47).
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