1 . CONVENTION ON JURISDICTION AND THE ENFORCEMENT OF JUDGMENTS - SPECIAL JURISDICTION - JURISDICTION IN MATTERS RELATING TO A CONTRACT - INDEPENDENT CONCEPT ( CONVENTION OF 27 SEPTEMBER 1968 , ART . 5 ( 1 )) 2 . CONVENTION ON JURISDICTION AND THE ENFORCEMENT OF JUDGMENTS - SPECIAL JURISDICTION - JURISDICTION IN MATTERS RELATING TO A CONTRACT - CONCEPT OF MATTERS RELATING TO A CONTRACT - OBLIGATIONS TO PAY MONEY HAVING THEIR BASIS IN THE RELATIONSHIP BETWEEN AN ASSOCIATION AND ITS MEMBERS BY VIRTUE OF MEMBERSHIP - INCLUSION ( CONVENTION OF 27 SEPTEMBER 1968 , ART . 5 ( 1 ))