242It must however be pointed out that no legislative provision required the Commission to draw up an official report of refusal to submit to the investigation decision within a specific time, or to send that document to the undertaking concerned within a particular time. The Courts of the Union take the view that the principle of proper administration cannot transform into an obligation that which the legislature did not view as being one (see, to that effect, Case C-255/90 P Burban v Parliament [1992] ECR I-2253, paragraph 20).
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