2006 New York Code - Requirements For Below-grade Storage In Mercantile Occupancies.

 
    §   27-4070.   Requirements  for  below-grade  storage  in  mercantile
  occupancies. A system of automatic sprinklers shall be provided in  each
  basement,  cellar or other location below grade, regardless of the floor
  area of such  space,  in  any  mercantile  establishment  in  which  the
  commissioner  permits  the storage of combustible mixtures, except that,
  where combustible mixtures are stored in such basement, cellar or  other
  location  below  grade,  in  a  room  or  other area that is segregated,
  vertically  and  horizontally,  from  surrounding  spaces  by   a   fire
  separation  of  not  less  than  a two-hour fire-resistance rating, such
  system of automatic sprinklers shall be required only within  such  room
  or  other area. Such system of automatic sprinklers shall conform to the
  requirements for automatic sprinklers for spaces classified  in  storage
  occupancy  group  B-1 pursuant to subdivision d of section 27-954 of the
  building code.