76/257/EEC: Commission Opinion of 17 February 1976 addressed to the Government of the Kingdom of Belgium on two ministerial decrees of 29 October 1975, one governing cross-frontier transport to France and the Netherlands by inland waterway, the other amending the conditions under which vessels engaged in the carriage of goods for own account are freed from the control of the freighting rota offices of the Office régulateur de la Navigation intérieure (Central Office for Inland Waterway Transport)