Judgment of the Court; 7 March 1985; Hannelore Spitzley v Sommer Exploitation SA; in Case 48/84

The court of a Contracting State before which the applicant, without raising any objection as to the court's jurisdiction, enters an appearance in proceedings relating to a claim for a set-off which is not based on the same contract or subject-matter as the claims in his application and in respect of which there is a valid agreement conferring exclusive jurisdiction on the courts of another Contracting State within the meaning of Article 17 of the Convention of 27 September 1968 on Jurisdiction and the Enforcement of Judgments in Civil and Commercial Matters has jurisdiction by virtue of Article 18 of that Convention.