Section 59. Bakeries and fat boiling

1. It shall be unlawful to construct
  or maintain a bakery or a place of business where fat is boiled  in  any
  non-fireproof  multiple  dwelling or upon the lot on which such dwelling
  is situated, unless the ceiling, side walls  and  all  exposed  iron  or
  wooden  beams,  girders  and  columns within the said bakery or business
  place where fat is boiled, are covered with fireproof materials.
    2. There shall be no door, window, dumbwaiter shaft or  other  opening
  between  such  a  bakery  or  business place where fat is boiled and any
  other part of the dwelling, except that:
    a. There may be access to the public parts of the  dwelling  from  any
  bakery  maintained  therein  if  the  product of such bakery is consumed
  exclusively within such dwelling.
    b. In a fireproof hotel where a retail bakery is  maintained  therein,
  there  may be access to the public parts of the hotel, provided the door
  openings leading thereto from such bakery and the  door  assemblies  are
  fireproof  with the doors self-closing, and provided the public parts of
  such bakery premises are protected by one or more sprinkler heads.
    c. In bakeries in which no fat is boiled and on the premises of  which
  there  is  no  apparatus  for  fat  boiling,  a dumbwaiter communicating
  between the place where the baking is done and a bakery store above  may
  be  maintained  if  entirely  enclosed in a brick shaft with walls eight
  inches or more in thickness, without any openings  whatever  except  one
  door opening into the bakeshop and one into the bakery store. Every such
  opening shall be provided with a fireproof door and assembly so arranged
  that when one door is open, the other is entirely closed.
    3. Every part of a bakery, its plumbing, and the yards and open spaces
  adjoining  shall  be kept in good repair, in sanitary condition and free
  from rodents and vermin.