No person shall spit, expectorate or deposit
any sputum, saliva, mucus or any form thereof upon the floor or upon
any part of the interior, steps or platform of any public conveyance,
or upon the floor, staircase or any part of the interior of any public
building or upon the steps giving access thereto, or upon the sidewalk
or crosswalk of any street, alley, park or other public place within
the City.