retain the right to bring proceedings in any other court which has jurisdiction by virtue of this Convention.
 Article 18
 Apart from jurisdiction derived from other provisions of this Convention, a court of a Contracting State before whom a defendant enters an appearance shall have jurisdiction. This rule shall not apply where appearance was entered solely to contest the jurisdiction, or where another court has exclusive jurisdiction by virtue of Article 16.
 Section 7
 Examination as to jurisdiction and admissibility
 Article 19
 Where a court of a Contracting State is seised of a claim which is principally concerned with a matter over which the courts of another Contracting State have exclusive jurisdiction by virtue of Article 16, it shall declare of its own motion that it has no jurisdiction.
 Article 20
 Where a defendant domiciled in one Contracting State is sued in a court of another Contracting State and does not enter an appearance, the court shall declare of its own motion that it has no jurisdiction unless its jurisdiction is derived from the provisions of this Convention.
 The court shall stay the proceedings so long as it is not shown that the defendant has been able to receive the document instituting the proceedings in sufficient time to enable him to arrange for his defence, or that all necessary steps have been taken to this end.
 The provisions of the foregoing paragraph shall be replaced by those of Article 15 of the Hague Convention of 15 November 1965 on the service abroad of judicial and extrajudicial documents in civil or commercial matters, if the document instituting the proceedings or notice thereof had to be transmitted abroad in accordance with that Convention.
 Section 8
 Lis Pendens — related actions
 Article 21
 Where proceedings involving the same cause of action and between the same parties are brought in the courts of different Contracting States, any court other than the court first seised shall of its own motion decline jurisdiction in favour of that court.
 A court which would be required to decline jurisdiction may stay its proceedings if the jurisdiction of the other court is contested.
 Article 22
 Where related actions are brought in the courts of different Contracting States, any court other than the court first seised may, while the actions are pending at first instance, stay its proceedings.
 A court other than the court first seised may also, on the application of one of the parties, decline jurisdiction if the law of that court permits the consolidation of related actions and the court first seised has jurisdiction over both actions.
 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.
 Article 23
 Where actions come within the exclusive jurisdiction of several courts, any court other than the court first seised shall decline jurisdiction in favour of that court.
 Section 9
 Provisional,