A/RES/55/153 Section 2. Unification of States Article 21 Attribution of the nationality of the successor State Subject to the provisions of article 8, when two or more States unite and so form one successor State, irrespective of whether the successor State is a new State or whether its personality is identical to that of one of the States which have united, the successor State shall attribute its nationality to all persons who, on the date of the succession of States, had the nationality of a predecessor State. Section 3. Dissolution of a State Article 22 Attribution of the nationality of the successor States When a State dissolves and ceases to exist and the various parts of the territory of the predecessor State form two or more successor States, each successor State shall, unless otherwise indicated by the exercise of a right of option, attribute its nationality to: (a) Persons concerned having their habitual residence in its territory; and (b) Subject to the provisions of article 8: (i) Persons concerned not covered by subparagraph (a) having an appropriate legal connection with a constituent unit of the predecessor State that has become part of that successor State; (ii) Persons concerned not entitled to a nationality of any State concerned under subparagraphs (a) and (b) (i) having their habitual residence in a third State, who were born in or, before leaving the predecessor State, had their last habitual residence in what has become the territory of that successor State or having any other appropriate connection with that successor State. Article 23 Granting of the right of option by the successor States 1. Successor States shall grant a right of option to persons concerned covered by the provisions of article 22 who are qualified to acquire the nationality of two or more successor States. 2. Each successor State shall grant a right to opt for its nationality to persons concerned who are not covered by the provisions of article 22. 7