Judgment_paragraph 77 · Raffaella Mascolo and Others v Ministero dell’Istruzione, dell’Università e della Ricerca and Comune di Napoli (C-22/13, C-61/13, C-62/13, C-63/13, C-418/13)

77Furthermore, where, as in the present instance, 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 (see, inter alia, judgment in Fiamingo and Others, EU:C:2014:2044, paragraph 62 and the case-law cited).