83The Explanations relating to the Charter of Fundamental Rights refer in particular to the case-law according to which, where a Union institution has a wide discretion, the review of observance of guarantees conferred by the Union legal order in administrative procedures is of fundamental importance. Those guarantees include respect for the principle of diligence, that is to say, for the competent institution, the obligation to examine carefully and impartially all the relevant elements of the individual case (see, to this effect, judgments of 21 November 1991 in Technische Universität München, C‑269/90, ECR, EU:C:1991:438, paragraph 14; 6 November 2008 Netherlands v Commission, C‑405/07 P, ECR, EU:C:2008:613, paragraph 56; and 9 September 2011 Dow AgroSciences and Others v Commission, T‑475/07, ECR, EU:T:2011:445, paragraph 154).
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