75Thus, the general principles of law, in particular the principles of legal certainty and non-retroactivity, preclude inter alia that obligation to interpret national law in conformity with EU law from leading to the criminal liability of individuals being determined or aggravated, on the basis of a framework decision alone, in the absence of any legislation implementing its provisions, where they committed an infringement (judgments of 8 November 2016, Ognyanov, C‑554/14, EU:C:2016:835, paragraphs 63 to 64 and the case-law cited, and of 29 June 2017, Popławski, C‑579/15, EU:C:2017:503, paragraph 32).
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