OPINION OF THE ECONOMIC AND SOCIAL COMMITTEE ON THE COMMISSION PROPOSALS ON THE FIXING OF PRICES FOR AGRICULTURAL PRODUCTS AND RELATED MEASURES ( 1986/1987 ) AND ON THE PROPOSAL FOR A COUNCIL REGULATION ( EEC ) NO OF AMENDING REGULATIONS ( EEC ) NO 2759/75, NO 2771/75 AND NO 2777/75 ON THE COMMON ORGANIZATION OF THE MARKETS IN PIGMEAT, EGGS AND POULTRYMEAT AND REGULATIONS ( EEC ) NO 2764/75, NO 2773/75 AND NO 2778/75 AS REGARDS A COMPONENT FOR CALCULATING THE IMPORT LEVY