A/RES/55/153 nationality, has the right to the nationality of at least one of the States concerned, in accordance with the present articles. Article 2 Use of terms For the purposes of the present articles: (a) “Succession of States” means the replacement of one State by another in the responsibility for the international relations of territory; (b) “Predecessor State” means the State which has been replaced by another State on the occurrence of a succession of States; (c) “Successor State” means the State which has replaced another State on the occurrence of a succession of States; (d) “State concerned” means the predecessor State or the successor State, as the case may be; (e) “Third State” means any State other than the predecessor State or the successor State; (f) “Person concerned” means every individual who, on the date of the succession of States, had the nationality of the predecessor State and whose nationality may be affected by such succession; (g) “Date of the succession of States” means the date upon which the successor State replaced the predecessor State in the responsibility for the international relations of the territory to which the succession of States relates. Article 3 Cases of succession of States covered by the present articles The present articles apply only to the effects of a succession of States occurring in conformity with international law and, in particular, with the principles of international law embodied in the Charter of the United Nations. Article 4 Prevention of statelessness States concerned shall take all appropriate measures to prevent persons who, on the date of the succession of States, had the nationality of the predecessor State from becoming stateless as a result of such succession. Article 5 Presumption of nationality Subject to the provisions of the present articles, persons concerned having their habitual residence in the territory affected by the succession of States are presumed to acquire the nationality of the successor State on the date of such succession. 3