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in the territory of the other contracting party from customs duties, inspection fees, or similar duties or charges, even though such supplies be used by such aircraft on flights in that territory. (4) Each designated airline shall have the right to use, on the routes specified in the Annex to this Agreement, all airports, airways and other facilities provided by the contracting parties for use by international air services. (5) Each contracting party shall grant to the designated airline of the other contracting party treatment in the application of its customs, immigration, quarantine, and similar regulations equal to that granted to its own designated airline. Article VI Certificates of airworthiness and certificates of competency, dnd licenses issued or rendered valid by one contracting party and still in force, shall be recognised as valid by the other contracting party for the purpose of operating the services specified in the Annex. Each contracting party reserves the right, however, to refuse to recognise for the purpose of flight above its own territory, certificates of competency and licenses granted to any of its own nationals, by any authority other than its own. Article VII (1) The laws and regulations of a contracting party relating to entry into, or departure from, its territory of aircraft engaged in international air navigation or to the operation and navigation of such aircraft while within its territory, shall apply to aircraft of a designated airline of the other contracting party. (2) The laws and regulations of a contracting party relating to the entry into, sojourn in and departure from, its territory of passengers, crew or cargo of aircraft (such as regulations relating to entry, clearance, immigration, passports, customs and quarantine) shall be applicable to the passengers, crew and cargo of aircraft of a designated airline of the other contracting party, while in the territory of the former contracting party. Article VIII (1) Notwithstanding the other provisions of this Agreement, if either contracting party is not satisfied that substantial ownership and effective control of an airline designated under