1 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - EXPORT REFUNDS - APPLICATION OF THE COMMUNITY RULES - POWERS OF NATIONAL AUTHORITIES - INTERPRETATION BY THE COMMISSION - NOT BINDING ON THE NATIONAL AUTHORITIES 2.ACTION FOR DAMAGES - ACTION BROUGHT AGAINST NATIONAL MEASURES IMPLEMENTING COMMUNITY LAW - INADMISSIBLE ( EEC TREATY , ART . 178 AND PARAGRAPH OF ART . 215 )