Vessels exempt from entry.
It shall not be necessary for the master of any vessel of war, or of any vessel employed by any prince, or state, as a public packet for the conveyance of letters and dispatches, and not permitted by the laws of such prince or state to be employed in the transportation of merchandise, in the way of trade, to make report and entry. (R. S., 2791.)
Any passenger vessel engaged triweekly or oftener in trade between ports of the United States and foreign ports shall be exempt from entrance and clearance fees and tonnage taxes while such service triweekly or oftener is maintained. (May 28, 1908.)