Done at Vienna on 23 August 1978
become Parties to the present Convention of the communication to him of that notification and of its terms.
Article 8
Agreements for the devolution of treaty obligations or
rights from a predecessor State to a successor State
1. The obligations or rights of a predecessor State under treaties in force in respect of a territory at the date of a succession of States do not become the obligations or rights of the successor State towards other States Parties to those treaties by reason only of the fact that the predecessor State and the successor State have concluded an agreement providing that such obligations or rights shall devolve upon the successor State.
2. Notwithstanding the conclusion of such an agreement, the effects of a succession of States on treaties which, at the date of that succession of States, were in force in respect of the territory in question are governed by the present Convention.
Article 9
Unilateral declaration by a successor State regarding
treaties of the predecessor State
1. Obligations or rights under treaties in force in respect of a territory at the date of a succession of States do not become the obligations or rights of the successor State or of other States Parties to those treaties by reason only of the fact that the successor State has made a unilateral declaration providing for the continuance in force of the treaties in respect of its territory.
2. In such a case, the effects of the succession of States on treaties which, at the date of that succession of States, were in force in respect of the territory in question are governed by the present Convention.
Article 10
Treaties providing for the participation
of a successor State
1. When a treaty provides that, on the occurrence of a succession of States, a successor State shall have the option to consider itself a party to the treaty, it may notify its succession in respect of the treaty in conformity with the provisions of the treaty or, failing any such provisions, in conformity with the provisions of the present Convention.
2. If a treaty provides that, on the occurrence of a succession of States, a successor State shall be considered as a party to the treaty, that provision takes effect as such only if the successor State expressly accepts in writing to be so considered.
3. In cases falling under paragraph 1 or 2, a successor State which establishes its consent to be a party to the treaty is considered as a party from the date of the succession of States unless the treaty otherwise provides or it is otherwise agreed.
