2006 New York Code - Single Room Occupancy.

 
    §  27-2079  Single  room  occupancy. Every building containing rooming
  units, and each individual apartment used  for  single  room  occupancy,
  shall  contain  at  least one water closet, washbasin and bath or shower
  for each six persons lawfully occupying rooming units therein,  and  for
  any  remainder of less than six persons. At least one water closet shall
  be located on any floor containing a rooming unit. If there are not more
  than two rooms on the first story above the basement in a rooming house,
  no water closet is required on such floor but the occupants of the  room
  shall be counted in determining the required number of facilities.