Article 16 2.

At the request of one or more Member States that consider that the principles and rules referred to in Articles 14 and 15 have not been properly applied, or on its own initiative, the Commission shall carry out an investigation into any allegation of non-compliance or non-application of the principles and/or rules concerned. Without prejudice to Article 18(1), the Commission shall share the results of the investigation with the Member States, Eurocontrol and the airspace users’ representatives. Within two months of receipt of a request, after having heard the Member State concerned and after consulting the Single Sky Committee in accordance with the advisory procedure referred to in Article 5(2) of the framework Regulation, the Commission shall take a decision on the application of Articles 14 and 15 of this Regulation and as to whether the practice concerned may continue.