1 . TAX PROVISIONS - INTERNAL TAXATION - PROVISIONS OF THE TREATY - OBJECTIVE ( EEC TREATY , ART . 95 ) 2 . TAX PROVISIONS - INTERNAL TAXATION - PROVISIONS WHOSE EFFECT IS TO PROTECT DOMESTIC PRODUCTION - SIMILAR DOMESTIC AND IMPORTED PRODUCTS - CONCEPT OF ' ' SIMILAR PRODUCTS ' ' - FLEXIBLE INTERPRETATION ( EEC TREATY , FIRST PARAGRAPH OF ART . 95 ) 3 . TAX PROVISIONS - NATIONAL TAXATION - PROVISIONS WHOSE EFFECT IS TO PROTECT DOMESTIC PRODUCTION - COMPETING DOMESTIC AND IMPORTED PRODUCTS - CONCEPT OF COMPETING PRODUCTS - CRITERIA FOR APPRAISAL ( EEC TREATY , SECOND PARAGRAPH OF ART . 95 )