Artikel 16

16.1. If either of the Contracting Parties considers it desirable to modify any provision of the present Agreement, or its Annex, it may request consultation with the other Contracting Party; such consultations, which may be between the respective aeronautical authorities and which may be through discussion or by correspondence, shall begin within a period of sixty days from the date of the request.
16.2. Any modification of this Agreement decided upon during the consultations referred to in paragraph 16.1 of this Article shall be agreed upon in writing between the Contracting Parties and shall take effect on the date on which the Contracting Parties have informed each other in an exchange of diplomatic notes that the formalities constitutionally required therefor in their respective countries have been complied with.
16.3. The respective aeronautical authorities are entitled to agree in writing upon any modifications of the Annex to the present Agreement decided by them during the consultations referred to in paragraph 16.1 of this Article. Such modifications shall take effect on a date to be determined by agreement between the said authorities.
16.4. If a multilateral agreement concerning air transport comes into force in respect of both Contracting Parties, this Agreement shall be amended so as to conform with that Agreement.