++++ 1 . OBLIGATIONS OF MEMBER STATES - FAILURE TO FULFIL SUCH OBLIGATIONS - MEASURES ADOPTED BY THE COMMISSION - SUBJECT-MATTER - GROUNDS ( EEC TREATY, ARTICLE 169 ) 2 . POLICY OF THE EEC - TAX PROVISIONS - EXPORT OF PRODUCTS TO ANOTHER MEMBER STATE - INTERNAL TAXATION - TAXATION IMPOSED DIRECTLY OR INDIRECTLY ON THE PRODUCTS - CONCEPT - REPAYMENT - LEGALITY ( EEC TREATY, ARTICLE 96 ) 3 . POLICY OF THE EEC - TAX PROVISIONS - EXPORT OF PRODUCTS TO ANOTHER MEMBER STATE - INTERNAL TAXATION - REPAYMENT - FLAT RATE SYSTEM - LEGALITY - PROOF - ONUS OF PROOF