2006 New York Code - Existing Projections.

 
    §  27-312  Existing  projections. Any part of a building that projects
  beyond a street line on January first, nineteen hundred thirty-eight may
  be maintained as constructed  until  its  removal  is  directed  by  the
  council or the board of estimate.
    (a) Alterations. Alterations to existing projections beyond the street
  line  may  be  permitted  in  whole  or  in  part,  provided  that  such
  alterations conform with the requirements of this subchapter.