80According to the case-law, where such a complaint has been submitted, the Commission may, in certain circumstances, be required to investigate a complaint by going beyond merely examining the matters of fact and law brought to its knowledge by the complainant. The Commission is required, in the interests of sound administration of the fundamental rules of the Treaty relating to State aid, to conduct a diligent and impartial examination of the complaint which may make it necessary for the Commission to examine elements that were not expressly put forward by the complainant (see judgment of 15 March 2018, Naviera Armas v Commission, T‑108/16, EU:T:2018:145, paragraph 101 and the case-law cited).