Artikel 17

If either of the Contracting Parties considers it desirable to modify the terms of the present Agreement and the Annex thereto it may request a consultation between the aeronautical authorities of both Contracting Parties in relation to the proposed modification. Consultations shall begin within a period of sixty (60) days from the date of the request unless the aeronautical authorities of the Contracting Parties agree upon the prolongation of that period. Any modification of the Agreement agreed by the Contracting Parties shall come into effect on a date to be determined in an exchange of diplomatic notes and be dependent upon the completion of nationally required legal procedures. Any modification of the Annex may be made by an agreement between the aeronautical authorities of the Contracting Parties.