2006 New York Code - Sprinkler Alarm System.

 
    § 27-957 Sprinkler alarm system. (a) A sprinkler alarm system shall be
  provided  in  accordance  with  the  applicable  provisions of reference
  standards RS 17-2, RS 17-2A, RS 17-2B and RS 17-3. Where the building is
  provided with a class E or modified class E fire  alarm  signal  system,
  compliance with the applicable provisions of reference standard RS 17-3A
  or  RS  17-3B  shall  be  acceptable  in  lieu  of  compliance  with the
  provisions of reference standard RS 17-3.
    (b) A  sprinkler  alarm  system  shall  be  required  when  more  than
  thirty-six  heads  are  installed in any fire area or section. See table
  17-2 for general requirements.