++++ 1 . EUROPEAN ECONOMIC COMMUNITY - COMMUNITY LEGAL ORDER - FAILURE TO OBSERVE THE TREATY - OBLIGATION ON ALL THOSE CONCERNED TO OBSERVE PROCEDURES LAID DOWN IN THE TREATY 2 . CUSTOMS DUTIES - CHARGES HAVING EQUIVALENT EFFECT - PROHIBITION ON NEW DUTIES - SCOPE - NEED FOR EVERY EXCEPTION TO BE EXPLICITLY LAID DOWN ( EEC TREATY, ARTICLE 12 ) 3 . CUSTOMS DUTIES - CHARGES HAVING EQUIVALENT EFFECT - PROHIBITION ON NEW DUTIES - APPLICATION TO AGRICULTURAL PRODUCTS ( EEC TREATY, ARTICLES 12 AND 39 TO 46 ) 4 . CUSTOMS DUTIES - CHARGES HAVING EQUIVALENT EFFECT - PROHIBITION ON NEW DUTIES - APPLICATION AS REGARDS A NATIONAL MARKET ORGANIZATION ( EEC TREATY, ARTICLE 12 ) 5 . NATIONAL MARKET ORGANIZATION - CONCEPT