Opinion of the Economic and Social Committee on the Commission to the Council on the operation of the markets in surface goods transport within the Community ( road, rail and inland waterway ), and on four draft Regulations concerning: a system for observing the markets for the carriage of goods by road, rail and inland waterway; the fixing of rates for international goods transport by rail between Member States; a system of reference tariffs for the carriage of goods by road between Member States; a system of reference tariffs for the carriage of goods by inland waterway between Member States