Extent of liability in respect of goods carried in open wagon.

    Where any goods, which, under ordinary circumstances, would be carried in covered wagon and would be liable to damage, if carried otherwise, are with the consent of the consignor, recorded in the forwarding note, carried in open wagon, the responsibility of railway administration for destruction, damage or deterioration which may arise only by reason of the goods being so carried, shall be one-half of the amount of liability for such destruction, damage or deterioration determined under this Chapter.