Whenever it appears that, with respect to the allocation and use of slots at its airports, a third country:
(a)
does not grant Community air carriers treatment comparable to that granted by this Regulation to air carriers from that country, or
(b)
does not grant Community air carriers de facto national treatment, or
(c)
grants air carriers from other third countries more favourable treatment than Community air carriers,
the Commission may, in accordance with the procedure referred to in Article 13(2), decide that a Member State or Member States shall take measures, including the suspension in whole or in part of the application of this Regulation in respect of an air carrier or air carriers of that third country with a view to remedying the discriminatory behaviour of the third country concerned.