Section 27-455. Sprinklers

(a) Automatic sprinkler protection complying with
  the  construction  provisions  of  article  four of subchapter seventeen
  shall  be  provided  as  required  for  occupancy  group  B-1   or   B-2
  respectively,  except  that  in  existing buildings lawfully occupied as
  garages prior to December sixth, nineteen hundred  sixty-eight,  storage
  of  forty-five  thousand gallons or less of product having a flash point
  over one hundred degrees F (tag open cup) in the  cargo  space  of  tank
  truck   or  other  vehicles  approved  for  such  storage  by  the  fire
  commissioner, pending delivery, shall not be deemed to require sprinkler
  protection.
    (b)  Smoke  detection  or  thermostatic  alarm  with  central   office
  connection.  A  thermostatic  alarm  system  or  smoke  detection system
  equipped with a central  office  connection  complying  with  subchapter
  seventeen  of  this code, and reference standard RS-17-3 of the appendix
  to this code may be provided in lieu of the  sprinkler  system  required
  under  the preceding subdivision in existing buildings lawfully occupied
  as garages prior to December sixth, nineteen hundred  sixty-eight,  when
  the storage of fuel oils or other products having a flash point over one
  hundred  degrees  F  (tag  open cup) is twenty-two thousand five hundred
  gallons or more but not exceeding forty-five  thousand  gallons  in  the
  cargo  space  of tank trucks or other vehicles approved for such storage
  by the fire commissioner, pending delivery.
    (c) Portable fire fighting appliances, as the  fire  commissioner  may
  direct,  shall  be  provided  in existing buildings lawfully occupied as
  garages prior to December sixth, nineteen hundred sixty-eight, when  the
  storage  of  fuel  oils or other products, having a flash point over one
  hundred degrees F (tag open cup), in the cargo space of tank  trucks  or
  other  vehicles  approved  for  such  storage  by the fire commissioner,
  pending delivery, is less than twenty-two thousand five hundred gallons.