64In that regard, where EU law does not lay down any specific penalties in the event that instances of abuse are nevertheless established, it is incumbent on the national authorities to adopt measures that are not only proportionate, but also sufficiently effective and a sufficient deterrent to ensure that the provisions adopted pursuant to the Framework Agreement are fully effective (judgments of 26 November 2014, Mascolo and Others, C‑22/13, C‑61/13 to C‑63/13 and C‑418/13, EU:C:2014:2401, paragraph 77 and the case-law cited, and of 7 March 2018, Santoro, C‑494/16, EU:C:2018:166, paragraph 29).
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