The Ontario Building Code | Portable Fire Extinguishers
220.127.116.11. Portable Fire Extinguishers
(1) Portable fire extinguishers shall be installed in all buildings, except within dwelling units, in conformance with the provisions of Part 6 of Division B of the Fire Code made under the Fire Protection and Prevention Act, 1997.
(2) In a Group B, Division 1 major occupancy, portable fire extinguishers are permitted to be located in secure areas, or in lockable cabinets provided,
(a) identical keys for all cabinets are located at all supervisory or security stations, or
(b) electrical remote release devices are provided and are connected to an emergency power supply.