The city manager may designate parking spaces on a public street for back-in parking
by placing signs giving notice of such designation.
(b)
It is unlawful for any person to back a vehicle, other than a motorcycle, into a parking
space on a public street that is not designated by the city manager for back-in parking
or to park head-in into a parking space on a public street designated by the city
manager for back-in parking.