Article 4

1. If the defendant is not domiciled in a Member State, the jurisdiction of the courts of each Member State shall, subject to Articles 22 and 23, be determined by the law of that Member State.

2. As against such a defendant, any person domiciled in a Member State may, whatever his nationality, avail himself in that State of the rules of jurisdiction there in force, and in particular those specified in Annex I, in the same way as the nationals of that State.