Section 27-956. Standard for installation of sprinklers

(a) Except as herein
  provided   in   subdivision  (b)  of  this  section,  the  installation,
  components, sizing, spacing, location, clearances, position, and type of
  systems shall be in accordance with reference standard RS  17-2,  except
  that  sprinkler  systems  in  one  and  two  family dwellings may in the
  alternative be in accordance  with  reference  standard  RS  17-2B,  and
  sprinkler  systems  in  other  residential  buildings  not exceeding six
  stories or seventy-five feet in height and in other  residential  spaces
  in  buildings  not  exceeding six stories or seventy-five feet in height
  may in the alternative be  in  accordance  with  reference  standard  RS
  17-2A.
    (b)  Notwithstanding  any  provision  to  the  contrary  contained  in
  reference standards RS 17-2, RS 17-2A or  RS  17-2B  sprinklers  may  be
  omitted  from  clothes  closets, linen closets, pantries, water closets,
  water closet compartments, bathrooms, general toilet  rooms  and  shower
  rooms in buildings and spaces classified in occupancy group J-2 and J-3.