1 . TAX PROVISIONS - HARMONIZATION OF LAWS - TURNOVER TAX - COMMON SYSTEM OF VALUE-ADDED TAX - DUTY LEVIED ON THE IMPORTATION OF VEHICLES - INTERNAL TAXATION - PROVISIONS RELATING TO CUSTOMS DUTIES AND CHARGES HAVING AN EQUIVALENT EFFECT - INAPPLICABILITY ( EEC TREATY , ARTS 12 , 13 AND 95 ) 2 . TAXATION PROVISIONS - HARMONIZATION OF LAWS - TURNOVER TAX - COMMON SYSTEM OF VALUE-ADDED TAX - EXEMPTIONS PROVIDED FOR BY THE SIXTH DIRECTIVE - EXEMPTION FOR THE TEMPORARY IMPORTATION OF GOODS - TEMPORARY IMPORTATION OF VEHICLES BY STUDENTS RESIDENT IN OTHER MEMBER STATES - LEVYING OF TAX - UNLAWFULNESS ( COUNCIL DIRECTIVE 77/388/EEC , ART . 14 )