Sorry if this is a re-post but FYI, ICBC is issuing new L and N signs specifically for motorcycles.
The signs are slightly smaller than the current ones for vehicles. The signs are more reflective and the actual L and N is "white" instead of "black" to be more reflective. The signs are speciffically designed to be attached under the licence plate with a zap strap.
I have no idea if they are acceptable for vehicle but I have already seen motorists using them on their cars.
Just the heads up for L or N riders, that with these new signs, police will probably not accept any excuses for not having a sign or telling them that an insurance agent said I don't need one.