++++ 1 . MEASURES ADOPTED BY AN INSTITUTION - DECISION - DIRECT EFFECTS - RIGHT OF INDIVIDUALS TO INVOKE BEFORE COURTS OF LAW ( EEC TREATY, ARTICLE 189 ) 2 . TURNOVER TAXES - APPLICATION OF COMMON SYSTEM OF TURNOVER TAX CONCURRENTLY WITH SPECIFIC TAXES LEVIED INSTEAD OF TURNOVER TAX - PROHIBITION DIRECTED TO MEMBER STATES - DIRECT EFFECTS AS REGARDS INDIVIDUALS ( COUNCIL DECISION OF 12 MAY 1965, ARTICLE 4, COUNCIL DIRECTIVES OF 11 APRIL 1967 AND 9 DECEMBER 1969 ) 3 . TURNOVER TAXES - APPLICATION OF COMMON SYSTEM OF TURNOVER TAX CONCURRENTLY WITH SPECIFIC TAXES LEVIED INSTEAD OF TURNOVER TAX - PROHIBITION - DATE OF ENTRY INTO FORCE ( COUNCIL DECISION OF 13 MAY 1965, ARTICLE 4, COUNCIL DIRECTIVES OF 11 APRIL 1967 AND 9 DECEMBER 1969 ) 4 . TURNOVER TAXES - APPLICATION OF COMMON SYSTEM OF TURNOVER TAX CONCURRENTLY WITH SPECIFIC TAXES LEVIED INSTEAD OF TURNOVER TAX - PROHIBITION - SCOPE OF APPLICATION ( COUNCIL DECISION OF 13 MAY 1965, ARTICLE 4, COUNCIL DIRECTIVES OF 11 APRIL 1967 AND 9 DECEMBER 1969 ) 5 . PROCEDURE - QUESTIONS REFERRED FOR PRELIMINARY RULING - JURISDICTION OF THE COURT - LIMITS ( EEC TREATY, ARTICLE 177 )