Article 6

(a) fuel, lubricating oils, spare parts, regular aircraft equipment, and aircraft stores introduced into the territory of one Contracting Party, or taken on board aircraft in that territory, by the airline designated by the other Contracting Party, and intended solely for use by or in the aircraft of that airline in the operation of the agreed services;

(b) aircraft used on the agreed services;

(c) fuel, lubricating oils, spare parts, regular aircraft equipment, and aircraft stores which are on board any such aircraft of the airline designated by one Contracting Party on arrival in the territory of the other Contracting Party and are retained on board on leaving the territory of that Party or consumed during flight over that territory on the agreed services.