39In accordance with established case-law, the right to be heard guarantees every person the opportunity to make known his views effectively during an administrative procedure and before the adoption of any decision liable to affect his interests adversely (see M, EU:C:2012:744, paragraph 87 and the case-law cited). As indicated in paragraph 31 above, that right is required even where the applicable legislation does not expressly provide for such a procedural requirement (see G and R, EU:C:2013:533, paragraph 32 and the case-law cited).
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