All service stations or garages providing for the self-service dispensing of flammable liquids by persons other than the owner, lessee, tenant, agent, servant or authorized employees shall comply with the following provisions:
A.
An Underwriters' Laboratories, Inc., approved fixed-pipe dry chemical extinguishing system, provided with both automatic and manual controls, shall be installed at each pump island where self-service is utilized. Such extinguishing system shall be approved by the Fire Prevention Bureau.
B.
The manual control shall be clearly identified, easily accessible and installed at the control console (remote control).
C.
All employees shall be trained as to the location and use of the remote control manual operation of the system.
D.
Each extinguisher head shall be installed in such a manner that the accumulation of ice or snow shall not adversely affect the operation of the system.