Commission Regulation (EEC) No 1846/87 of 30 June 1987 establishing ceilings and Community surveillance for imports of iceberg lettuce (Lactuca sativa L., var. capitata) and walnuts falling within subheadings ex 07.01 D II and 08.05 B of the Common Customs Tariff and originating in the African, Caribbean and Pacific States and the overseas countries and territories (1987)