1 . QUESTIONS REFERRED FOR A PRELIMINARY RULING - JUDGMENT - OPERATIVE PART - INTERPRETATION - REFERENCE TO THE GROUNDS OF JUDGMENT ( EEC TREATY , ART . 177 ) 2 . COMMON CUSTOMS TARIFF - VALUATION OF GOODS FOR CUSTOMS PURPOSES - DETERMINATION - NORMAL PRICE OF GOODS - VALUE OF A PATENT FOR A PROCESS - INCLUSION - CONDITIONS ( REGULATION NO 803/68 OF THE COUNCIL , ART . 3 )