1 . INTERNAL TAXATION - PRODUCTS OF OTHER MEMBER STATES - TAXATION - SYSTEM - DIFFERENCE COMPARED WITH THE ONE USED FOR THE TAXATION OF SIMILAR DOMESTIC PRODUCTS - DISCRIMINATION AGAINST IMPORTED PRODUCTS - PROHIBITION ( EEC TREATY , FIRST PARAGRAPH OF ARTICLE 95 ) 2 . INTERNAL TAXATION - PRODUCTS OF OTHER MEMBER STATES - TAXATION - SYSTEM - CHOICE - COMPETENCE OF THE MEMBER STATES - RESTRICTION THEREOF BY THE PROHIBITION OF DISCRIMINATION WITHIN THE MEANING OF THE FIRST PARAGRAPH OF ARTICLE 95 - ABSENCE 3 . INTERNAL TAXATION - PRODUCTS OF OTHER MEMBER STATES - TAXATION - SYSTEM - CHOICE - GRADUATED TAX - APPLICATION TO PRODUCTION - PERIOD OF REFERENCE FIXED - LIMITS OF THE FIRST PARAGRAPH OF ARTICLE 95