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Without prejudice and in addition to the treatment to which each Contracting Party is under obligation to accord under Article 24 of the Convention fuel, lubricating oils, and aircraft stores introduced into the territory of one Contracting Party or taken on board aircraft in that territory by or on behalf of the other Contracting Party or its designated airline or airlines and intended solely for use by or in the aircraft of those airlines shall be accorded treatment not less favourable than that accorded to similar supplies introduced into the said territory or taken on board aircraft in that territory and intended for use by or in the aircraft of a national airline of the first Contracting Party, or of the most favoured foreign airline engaged in international air services.