1 . TAX PROVISIONS - INTERNAL TAXATION - DISCRIMINATION - PROHIBITION - VALUE-ADDED TAX LEVIED ON THE IMPORTATION OF PRODUCTS FROM OTHER MEMBER STATES BY A NON-TAXABLE PERSON - DISTINCTION BETWEEN TRANSACTIONS EFFECTED FOR VALUABLE CONSIDERATION AND OTHER TRANSACTIONS - IRRELEVANT ( EEC TREATY , ART . 95 ; COUNCIL DIRECTIVE 77/388 ) 2 . TAX PROVISIONS - HARMONIZATION OF LAWS - TURNOVER TAX - COMMON SYSTEM OF VALUE-ADDED TAX - VALUE-ADDED TAX LEVIED ON THE IMPORTATION OF PRODUCTS FROM OTHER MEMBER STATES BY A NON-TAXABLE PERSON - METHOD OF CALCULATION ( EEC TREATY , ART . 95 ; COUNCIL DIRECTIVE 77/388 )