XXIII. Numbering of Undocumented Motor Boats
In 1918 a law was passed requiring the numbering of all theretofore undocumented motor boats, except vessels under sixteen feet temporarily equipped with detachable motors. These numbers are awarded by the collectors of customs on application of the owner or master, and are required to be painted, or otherwise attached, to the bow of the vessel, and to be not less than three inches in size. Violation of the act is subject to a penalty of $10.
From the date of the passage of the act on December 7, 1917, up to July 1, 1919, nearly 100,000 such vessels had been numbered, and the experiment had proved highly successful in assisting the enforcement of the navigation laws and the collection of taxes as well as the enforcement of harbor police laws and regulations.