1 . FREE MOVEMENT OF GOODS - QUANTITATIVE RESTRICTIONS - MEASURES HAVING EQUIVALENT EFFECT - MARKETING OF PRODUCTS - DISPARITIES BETWEEN NATIONAL RULES - OBSTACLES TO INTRA-COMMUNITY TRADE - WHEN PERMISSIBLE ( EEC TREATY , ART . 30 ) 2 . FREE MOVEMENT OF GOODS - QUANTITATIVE RESTRICTIONS - MEASURES HAVING EQUIVALENT EFFECT - MARKETING IN ONE MEMBER STATE OF GOODS LAWFULLY PRODUCED AND MARKETED IN ANOTHER MEMBER STATE - REQUIREMENT OF A PARTICULAR FORM OF PACKAGING FOR MARGARINE AND EDIBLE FATS - NON-ESSENTIAL CONDITION FOR PROTECTING AND INFORMING THE CONSUMER - NOT PERMISSIBLE ( EEC TREATY , ART . 30 )