150As the General Court pointed out, in essence, in paragraph 215 of the judgment under appeal, the breach of the principle of observance of a reasonable period is capable of justifying the annulment of a decision taken following an administrative procedure based on Article 101 or 102 TFEU only if it also constitutes an infringement of the rights of the defence of the undertaking concerned (see, to that effect, judgment of 9 June 2016, PROAS v Commission, C‑616/13 P, EU:C:2016:415, paragraphs 74 to 76 and the case-law cited).