Section 27-929. Retroactive requirements

The provisions of this subchapter
  shall apply retroactively for  the  specific  occupancies  indicated  in
  subdivisions  (j)  and  (s)  of  section  27-954  and  paragraph  ten of
  subdivision (a) of section 27-968 of  this  subchapter.  An  application
  noting  compliance  shall  be  required  to  be filed on or before April
  thirteenth, nineteen hundred seventy-nine;  and  installation  shall  be
  required  on  or  before  January  thirteenth,  nineteen hundred eighty,
  except as otherwise provided in this code.
    (a) The provisions of this article shall apply retroactively  for  the
  specific  occupancies  and spaces indicated in subdivisions (v), (w) and
  (y)  of  section  27-954  and  subdivision  (j)   of   section   27-972.
  Installation  of  all  systems  required  by  these  sections  shall  be
  completed on or before April first, nineteen hundred eighty-seven.
    (b) Notwithstanding the provisions in subdivision a of  this  section,
  an  application  for a permit and approval of plans for the installation
  of fire alarm and signal systems as required  under  the  provisions  of
  article  five  of  this  subchapter in buildings classified in occupancy
  group J-l shall be filed with department on or  before  June  thirtieth,
  nineteen hundrd eighty-seven and such installation shall be completed on
  or before December thirty-first, nineteen hundred eighty-seven.
    (c)  Notwithstanding  any  other  provision  of  this  subchapter, the
  requirement to install a system  of  automatic  sprinklers  shall  apply
  retroactively to any space in a basement, cellar or other location below
  grade  subject  to the provisions of subdivision aa of section 27-954 of
  this code. Installation of such system of automatic sprinklers shall  be
  completed on or before April thirtieth, two thousand four.