1 . CONVENTION OF 27 SEPTEMBER 1968 ON JURISDICTION AND THE ENFORCEMENT OF JUDGMENTS IN CIVIL AND COMMERCIAL MATTERS - AGREEMENT CONFERRING JURISDICTION - MUTUAL ASSENT TO THE JURISDICTION OF THE COURTS OF THE STATE OF DOMICILE OF THE DEFENDANT - LAWFULNESS ( CONVENTION OF 27 SEPTEMBER 1968 , FIRST PARAGRAPH OF ARTICLE 17 ) 2 . CONVENTION OF 27 SEPTEMBER 1968 ON JURISDICTION AND THE ENFORCEMENT OF JUDGMENTS IN CIVIL AND COMMERCIAL MATTERS - AGREEMENT CONFERRING JURISDICTION - MUTUAL ASSENT TO THE JURISDICTION OF THE COURTS OF THE STATE OF DOMICILE OF THE DEFENDANT - POWER OF SUCH COURTS TO TAKE INTO ACCOUNT A SET-OFF CONNECTED WITH THE LEGAL RELATIONSHIP IN DISPUTE - CONDITIONS ( CONVENTION OF 27 SEPTEMBER 1968 , FIRST PARAGRAPH OF ARTICLE 17 )