If the notice is given as provided in Section 8.20.030, and the person upon whom such notice demand is made fails to remove as required by the notice such vehicle or vehicles, as the case may be, or fails to cause the same to be placed in an enclosure where it will not be visible from the street, then such person shall be in violation of this chapter and, upon conviction thereof, shall be punished by a fine not exceeding two hundred dollars, or by imprisonment in the city jail for a term not exceeding sixty days, or by both such fine and imprisonment.