54In the present case, it should be noted that the GDPR does not contain any provision intended to define the rules on the assessment of the damages to which a data subject, within the meaning of Article 4(1) of that regulation, may be entitled under Article 82 thereof, where an infringement of that regulation has caused him or her harm. Therefore, in the absence of rules of EU law governing the matter, it is for the legal system of each Member State to prescribe the detailed rules governing actions for safeguarding rights which individuals derive from Article 82 and, in particular, the criteria for determining the extent of the compensation payable in that context, subject to compliance with those principles of equivalence and effectiveness (see, by analogy, judgment of 13 July 2006, Manfredi and Others, C‑295/04 to C‑298/04, EU:C:2006:461, paragraphs 92 and 98).
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