++++ 1 . COMMON CUSTOMS TARIFF - DESCRIPTION OF GOODS - INTERPRETATION - ABSENCE OF COMMUNITY PROVISIONS - AUTHORITY OF THE EXPLANATORY NOTES AND THE CLASSIFICATION OPINIONS OF THE CONVENTION ON THE BRUSSELS NOMENCLATURE 2 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - CEREALS - PROCESSED PRODUCTS - EXPORTS TO THIRD COUNTRIES - REFUNDS - PEARLED BARLEY - COMMUNITY DEFINITION - POWERS OF THE MEMBER STATES ( REGULATION NO 19 OF THE COUNCIL, ARTICLE 20; REGULATION NO 141/64/EEC OF THE COUNCIL; REGULATION NO 60/66/EEC OF THE COMMISSION )