Section 18-D. Duty of street vendors to keep the sidewalk and street clean

Notwithstanding any other provision of law, any city which has  a  local
  law  or  ordinance  in  relation  to  responsibility  for maintenance of
  sidewalk and street cleanliness shall apply such  law  or  ordinance  or
  provisions  similar  thereto to any licensed or unlicensed street vendor
  using areas of sidewalks and streets subject to such law or ordinance.