All vessels, except seaplanes, constructed after November 1, 1972, and manufactured in or used on the waters of this state and under twenty (20) feet in length, except sailboats, canoes, kayaks and inflatable boats, shall have a certification and capacity plate permanently affixed to the vessel at a location so as to be clearly visible and legible from the position designed or normally intended to be occupied by the operator of the vessel when it is underway in the water.
Idaho Code § 67-7005