“Article 27 1. Where proceedings involving the same cause of action and between the same parties are brought in the courts of different Member States, any court other than the court first seised shall of its own motion stay its proceedings until such time as the jurisdiction of the court first seised is established. 2. Where the jurisdiction of the court first seised is established, any court other than the court first seised shall decline jurisdiction in favour of that court. Article 28 1. Where related actions are pending in the courts of different Member States, any court other than the court first seised may stay its proceedings. . . . 3. For the purposes of this Article, actions are deemed to be related where they are so closely connected that it is expedient to hear and determine them together to avoid the risk of irreconcilable judgments resulting from separate proceedings.”
“30. . . . adopts a simple method to determine, at the outset of proceedings, which of the courts seised will ultimately hear and determine the dispute. The court second seised is required, of its own motion, to stay its proceedings until the jurisdiction of the court first seised is established. Once that has been established, it must decline jurisdiction in favour of the court first seised. The purpose ofArticle 21 of the Convention would be frustrated if the content and nature of the claims could be modified by arguments necessarily submitted at a later date by the defendant. Apart from delays and expense, such a solution could have the result that a court initially designated as having jurisdiction under that article would subsequently have to decline to hear the case.”
“Article 30 For the purposes of this Section, a court shall be deemed to be seised: 1. at the time when the document instituting the proceedings or an equivalent document is lodged with the court, . . . , or 2. if the document has to be served before being lodged with the court, at the time when it is received by the authority responsible for service . . . .”
“83. . . . there have been authorities which discuss what is said to be the connected issue of how one identifies the court first seised of two actions involving “the same cause of action and between the same parties” within article 27. It is established that the “same cause of action” involves the double concept of “cause” and “objet”
“As it is difficult to see how a court can be said to be seised of a claim which has not been made and does not appear in the claim form, it cannot be correct that as long as a claim form has been issued and served, the court already has temporal priority over an issue which may later be added by amendment.”