Artikel 9

In the event either of the Contracting Parties considers it desirable to modify the routes or conditions set forth in the attached Annex, it may request consultation between the competent authorities of both Contracting Parties, such consultation to begin within a period of sixty days from the date of request. When these authorities mutually agree on new or revised routes or conditions affecting the Annex; their recommendations on the matter will come into effect after they have been confirmed by an exchange of diplomatic notes.