1 . FREE MOVEMENT OF GOODS - CUSTOMS DUTIES - CHARGES HAVING EQUIVALENT EFFECT - INTERNAL TAXATION - PAYMENT FOR SERVICE RENDERED - CONCEPTS - DISTINGUISHING CRITERIA ( EEC TREATY , ARTS 12 , 13 ( 2 ) AND 95 ) 2 . TAX PROVISIONS - HARMONIZATION OF LEGISLATION - TURNOVER TAXES - COMMON SYSTEM OF VALUE-ADDED TAX - VALUE-ADDED TAX LEVIED WHEN GOODS ARE IMPORTED FROM ANOTHER MEMBER STATE - NATURE OF INTERNAL TAXATION ( EEC TREATY , ARTS 12 , 13 ( 2 ) AND 95 ) 3 . FREE MOVEMENT OF GOODS - CUSTOMS DUTIES - CHARGES HAVING EQUIVALENT EFFECT - CONCEPT - POSTAL CHARGE FOR THE PRESENTATION FOR CUSTOMS CLEARANCE OF POSTAL PARCELS - INCLUSION - CONDITIONS ( EEC TREATY , ARTS 12 AND 13 ( 2 ))