Hawaii Revised Statutes Division 1. Government § 291C-130

(a) Any vehicle, or combination of vehicles, designed to operate at a speed of twenty-five miles per hour or less, including a neighborhood electric vehicle, and traveling on a public highway, except when guarded by a flagperson or a flare, or unless provided by ordinance, shall display a triangular slow moving vehicle emblem meeting ASAE Standard S276.2 as developed by the American Society of Agricultural Engineers, mounted on the rear of the vehicle, or combination of vehicles, base down and at a height of not less than three nor more than five feet from the ground to base.

(b) The use of the emblem on any vehicle, other than a vehicle designed to operate at a speed of twenty-five miles per hour or less, or on a stationary object on a public highway is prohibited.

(c) Any person who violates this section shall be fined not more than $500.