Double taxation avoidance for international airline income: treaty exempts aircraft operation income from tax in the other Contracting State. The treaty exempts income derived from the operation of aircraft in international traffic by an enterprise of one Contracting State from tax in the other Contracting State, extends that exemption to participations in pools, defines applicable taxes and enterprises, preserves domestic assessment rules except where the treaty provides otherwise, and includes provisions on entry into force, duration, termination, and an integral Protocol recording reciprocal non-imposition on specified pre-1962 incomes.