Depends on your state... Fed's require it on under 20, but NMMA requires a plate on all boats under 26' when leaving the factory. My state recently slipped in this language into code, previously it wasn't required. NMMA is a standards body so it would be required. In any case, that is a 15' boat.
The state game and fish department may require the display of seals, labels, plates,insignia, or other devices for the purpose of certifying or evidencing compliance with state orfederal safety rules and standards for boats and associated equipment.
