Where a party concerned has two or more nationalities, the party's national law is the law of the country of their nationality where they have habitual residence, or, the law of the country with which the party is most closely connected if there is no such country of their nationality where the party has habitual residence; provided, however, that if one of those nationalities is Japanese, Japanese law is the party's national law.
当事者が二以上の国籍を有する場合には、その国籍を有する国のうちに当事者が常居所を有する国があるときはその国の法を、その国籍を有する国のうちに当事者が常居所を有する国がないときは当事者に最も密接な関係がある国の法を当事者の本国法とする。ただし、その国籍のうちのいずれかが日本の国籍であるときは、日本法を当事者の本国法とする。
In cases where the national law of a party concerned governs, if the party has no nationality, the law of their habitual residence governs; provided, however, that this does not apply with regard to the application of Article 25 (including cases where it is applied mutatis mutandis pursuant to Article 26, paragraph (1) and Article 27) and Article 32.
Where a party concerned has nationality in a country where different laws are applied in different regions, their national law is the law designated in accordance with the rules of the country (in the absence of the rules, the law of the region with which the party is most closely connected).
当事者が地域により法を異にする国の国籍を有する場合には、その国の規則に従い指定される法（そのような規則がない場合にあっては、当事者に最も密接な関係がある地域の法）を当事者の本国法とする。