Sec. 121. Amount of tonnage duties. 122. Coasting and fishing vessels. 123. Documented vessels with registry endorsement in trade with Canada. 124. Passenger vessels trading between ports of United States and foreign ports. 125. Vessels making daily trips on interior waters. 128. Light money. 129. Exemption of unregistered vessels owned by citizens. 132. Vessels not entering by sea. 133. Hospital ships in time of war. 134. Designation by President of hospital ships exempted. 135. Rights under treaties preserved.