OWN-INITIATIVE OPINION OF THE ECONOMIC AND SOCIAL COMMITTEE ON THE COMMUNICATION FROM THE COMMISSION TO THE COUNCIL ON THE PROGRESS ACHIEVED IN THE FIRST STAGE OF ECONOMIC AND MONETARY UNION, ON THE ALLOCATION OF POWERS AND RESPONSIBILITIES AMONG THE COMMUNITY INSTITUTIONS AND THE MEMBER STATES ESSENTIAL TO THE PROPER FUNCTIONING OF ECONOMIC AND MONETARY UNION, AND ON THE MEASURES TO BE TAKEN IN THE SECOND STAGE OF ECONOMIC AND MONETARY UNION