102Thus, it results from both the Commission’s diligent and impartial examination of the complaints filed with it and from the scheme of Article 10(1) and (2) of Regulation No 659/1999, reproduced in essence in Article 12(1) and (2) of Regulation 2015/1589, that it is for the Commission, when it has received a complaint alleging infringement of Article 107(1) TFEU and identifying in an unequivocal and reasoned manner the measures giving rise to that infringement, to examine carefully whether those measures may be categorised as State aid, if necessary by seeking out the cooperation of the Member State concerned and taking into consideration elements that were not expressly put forward by the complainant. This is especially necessary where, as the applicant itself observed in essence in the complaint, a complainant does not have the powers of investigation conferred on the Commission by Article 108 TFEU nor, in principle, its investigatory capabilities.