Tax treaty definitions delimit territorial scope, resident persons, enterprises, nationals and competent authorities under the treaty. The treaty defines key terms for its operation: each State's territory includes territorial seas, airspace and maritime zones; 'person', 'company', 'enterprise' and 'national' cover individuals, corporate and other taxable entities under domestic law; 'international traffic' excludes wholly domestic carriage in the other State; and 'competent authority' designates each State's responsible tax ministry. A residual provision provides that undefined terms bear the meaning given by the domestic law of the Contracting State applying the Convention, unless context dictates otherwise.