Formal validity of dispositions of property upon death made in writing
Article 27
1. A disposition of property upon death made in writing shall be valid as regards form if its form complies with the law: (a) of the State in which the disposition was made or the agreement as to succession concluded; (b) of a State whose nationality the testator or at least one of the persons whose succession is concerned by an agreement as to succession possessed, either at the time when the disposition was made or the agreement concluded, or at the time of death; (c) of a State in which the testator or at least one of the persons whose succession is concerned by an agreement as to succession had his domicile, either at the time when the disposition was made or the agreement concluded, or at the time of death; (d) of the State in which the testator or at least one of the persons whose succession is concerned by an agreement as to succession had his habitual residence, either at the time when the disposition was made or the agreement concluded, or at the time of death; or (e) in so far as immovable property is concerned, of the State in which that property is located. The determination of the question whether or not the testator or any person whose succession is concerned by the agreement as to succession had his domicile in a particular State shall be governed by the law of that State. 2. Paragraph 1 shall also apply to dispositions of property upon death modifying or revoking an earlier disposition. The modification or revocation shall also be valid as regards form if it complies with any one of the laws according to the terms of which, under paragraph 1, the disposition of property upon death which has been modified or revoked was valid. 3. For the purposes of this Article, any provision of law which limits the permitted forms of dispositions of property upon death by reference to the age, nationality or other personal conditions of the testator or of the persons whose succession is concerned by an agreement as to succession shall be deemed to pertain to matters of form. The same rule shall apply to the qualifications to be possessed by any witnesses required for the validity of a disposition of property upon death.