CONVENTION ON JURISDICTION AND THE ENFORCEMENT OF JUDGMENTS IN CIVIL AND COMMERCIAL MATTERS - PROTOCOL ON THE INTERPRETATION BY THE COURT OF JUSTICE OF THE CONVENTION - NATIONAL COURTS WHICH MAY REQUEST THE COURT OF JUSTICE TO GIVE A PRELIMINARY RULING - COURTS SITTING ' ' IN AN APPELLATE CAPACITY ' ' - CONCEPT - ITALIAN COURT SITTING IN PROCEEDINGS AT FIRST INSTANCE BROUGHT AGAINST A PAYMENT ORDER MADE UNDER A SUMMARY PROCEDURE - EXCLUSION ( PROTOCOL OF 3 JUNE 1971 , ART . 2 ( 2 ))