New York Multiple Residence Law Section 31 - Inside cellar stairs.

  31.  Inside cellar stairs. Every stair leading from a cellar to the
  floor above in  all  old  multiple  dwellings  shall  be  enclosed  with
  fire-retarded  partitions  and  shall  be  equipped with a fire-retarded
  self-closing door located as the department may approve.

Last modified: February 3, 2019