You may not spit on the sidewalk.

6-1D-2: EXPECTORATING ON SIDEWALKS OR IN PUBLIC BUILDINGS: It is unlawful for any person to spit or expectorate upon any of the public sidewalks, crosswalks, passes, byways or paths in the city, or upon the floor or steps of the public building, store, hotel, church, opera house, office room, schoolhouse or any other building in…