84It follows that, where the improper use of successive fixed-term employment contracts or relationships has taken place, a measure offering effective and equivalent safeguards for the protection of workers must be capable of being applied in order duly to penalise that abuse and to nullify the consequences of the breach of EU law. According to the very wording of the first paragraph of Article 2 of Directive 1999/70, Member States must ‘take any necessary measures to enable them at any time to be in a position to guarantee the results imposed by [that] Directive’ (judgment of 24 June 2021, Obras y Servicios Públicos and Acciona Agua, C‑550/19, EU:C:2021:514, paragraph 49 and the case-law cited).
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