2006 New York Code - Power To Mark Boundaries And To Make Surveys.

 
    §  2-203 Power to mark boundaries and to make surveys. The mayor shall
  have the power to direct the  president  of  any  borough  to  mark  any
  boundary line or lines of the city, as such boundary line or lines is or
  are  determined  in and by the code, so as to distinguish and define the
  boundaries of the city, the boundaries of the boroughs,  and  any  other
  boundary  line or lines determined in and by the code, by such monuments
  as may be authorized by the mayor.