82It should also be noted that the geographic areas covered by such a targeted retention measure may and, where appropriate, must be amended in accordance with changes in the circumstances that justified their selection, thus making it possible to react to developments in the fight against serious crime. The Court has held that the duration of those targeted retention measures described in paragraphs 76 to 81 of this judgment must not exceed what is strictly necessary in the light of the objective pursued and the circumstances justifying them, without prejudice to the possibility of extending those measures should such retention continue to be necessary (judgment of 6 October 2020, La Quadrature du Net and Others, C‑511/18, C‑512/18 and C‑520/18, EU:C:2020:791, paragraph 151).
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