39In that regard, it should be borne in mind that the contracting authorities must, throughout the procedure, observe the principles of procurement set out in Article 18 of Directive 2014/24, which include, inter alia, the principles of equal treatment, transparency and proportionality (judgment of 20 September 2018, Montte, C‑546/16, EU:C:2018:752, paragraph 38).
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