1 . FREE MOVEMENT OF GOODS - CUSTOMS DUTIES - CHARGES HAVING EQUIVALENT EFFECT - CONCEPT - CONSIDERATION FOR SERVICE RENDERED - CRITERIA ( EEC TREATY , ARTS 9 , 12 , 13 AND 16 ) 2 . FREE MOVEMENT OF GOODS - CUSTOMS DUTIES - CHARGES HAVING EQUIVALENT EFFECT - STORAGE CHARGES LEVIED ON GOODS PRESENTED AT PUBLIC WAREHOUSES IN THE INTERIOR OF A MEMBER STATE - PERMISSIBILITY - LIMITS ( EEC TREATY , ARTS 9 AND 12 )