It’s done 
Article 6
Examination of the notification and initiation of proceedings
- The Commission shall examine the notification as soon as it is received.
(a) Where it concludes that the concentration notified does not fall within the scope of this Regulation, it shall record that finding by means of a decision.
(b) Where it finds that the concentration notified, although falling within the scope of this Regulation, does not raise serious doubts as to its compatibility with the common market, it shall decide not to oppose it and shall declare that it is compatible with the common market