Judgment of the Court; 22 March 1983; Martin Peters Bauunternehmung GmbH v Zuid Nederlandse Aannemers Vereniging; in Case 34/82

1. Obligations in regard to the payment of a sum of money which have their basis in the relationship existing between an association and its members by virtue of membership are "matters relating to a contract" within the meaning of Article 5 (1) of the Convention of 27 September 1968 on Jurisdiction and the Enforcement of Judgments in Civil and Commercial Matters.

2. It makes no difference in that regard whether the obligations in question arise simply from the act of becoming a member or from that act in conjunction with one or more decisions made by organs of the association.