2006 New York Code - Natural Ventilation Sources.

 
    §  27-749  Natural  ventilation  sources.  Natural  ventilation,  when
  required, shall be provided  by  windows,  skylights,  monitors,  doors,
  louvers,   jalousies,   or  other  similar  ventilating  openings.  Such
  ventilating openings shall open to the sky or a  public  street,  space,
  alley,  park, highway, or right of way, or upon a yard, court, plaza, or
  space above a setback, where such yard, court, plaza, or space  above  a
  setback  is located on the same lot and is of the dimensions required by
  the applicable provisions of the zoning resolution.