33As the Court has previously held, competent national authorities may authorise an activity subject to an assessment only if they have made certain that it will not adversely affect the integrity of the protected site. This is so when there is no reasonable doubt from a scientific point of view as to the absence of such adverse effects (see, to that effect, judgment of 8 November 2016, Lesoochranárske zoskupenie VLK, C‑243/15, EU:C:2016:838, paragraph 42 and the case-law cited).
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