Section 27-981. General requirements for smoke detecting devices

a. All
  smoke detecting devices required to be provided and  installed  pursuant
  to  this  article  shall  either  be  accepted  pursuant  to  rules  and
  regulations promulgated by the commissioner or be listed by a nationally
  recognized independent laboratory that maintains periodic inspections of
  production of  listed  equipment  and  whose  listing  states  that  the
  equipment   meets   nationally   recognized   standards.   To  meet  the
  requirements of  this  article,  such  laboratory  shall  be  one  which
  maintains  a  periodic  follow-up  service  of  the  devices  to  ensure
  compliance with the original listing.
    b. No device shall be deemed to be in compliance with  the  provisions
  of  this  article  unless  it  is  of  either  the ionization chamber or
  photo-electric type. Such  devices  shall  be  in  compliance  with  the
  requirements  of reference standard RS 17-11 and shall be installed in a
  manner consistent with the requirements of reference standard  RS  17-12
  except  that  devices  within  occupancy  group  J-1  shall be installed
  pursuant to rules and regulations promulgated by the commissioner.