The occupant of any building or portion thereof, or the owner of an unoccupied building or vacant lot, which abuts on any sidewalk shall have the right to put flowers or lawn grass in any unpaved portion of the sidewalk on which the building or lot abuts, and it shall be unlawful for any person to willfully or wantonly destroy or remove such flowers or lawn grass so planted, provided, that such flowers or lawn grass shall not be so planted or maintained as to interfere with or restrict the ordinary and customary use of the sidewalk by pedestrians.
('81 Code, § 97.04)  Penalty, see § 10.99