1 . ACTION AGAINST A MEMBER STATE FOR FAILURE TO FULFIL ITS OBLIGATIONS - PRE-LITIGATION PROCEDURE - REASONED OPINION - TIME-LIMIT FOR COMPLIANCE BY THE MEMBER STATE - SUSPENSION - CONDITIONS ( EEC TREATY , ART . 169 ) 2 . TAX PROVISIONS - HARMONIZATION OF LAWS - TURNOVER TAXES - COMMON SYSTEM OF VALUE-ADDED TAX - TAXABLE AMOUNT - TRADE-IN OF SECOND-HAND GOODS BY WAY OF PART-PAYMENT - NATIONAL RULES PROVIDING THAT THE VALUE OF THE GOODS TRADED IN IS NOT PART OF THE TAXABLE AMOUNT - PERMISSIBILITY - CONDITIONS ( COUNCIL DIRECTIVE NO 77/388 , ARTS 11 A 1 ( A ) AND 32 )