(a) Class I and Class II flammable liquids shall be transferred from underground tanks by means of fixed pumps so designed and equipped as to allow control of the flow and to prevent leakage or accidental discharge. Supplemental means shall be provided outside of the dispensing device whereby the source of power may be readily disconnected in the event of fire or other accident. Dispensing devices for Class I or Class II flammable liquids shall be of approved type. Devices meeting the standards of the Underwriters' Laboratories, Inc., shall be deemed to be in compliance with the section. Class I or Class II flammable liquids shall not be dispensed by pressure or gravity from drums, barrels, and similar containers. Gear pumps or similar positive displacement devices taking suction through the top of the container shall be used. Class I and Class II flammable liquids shall not be dispensed by a device that operates through pressure within a storage tank, unless the tank has been approved as a pressure vessel for the use to which it is subjected. In no case shall air or gas pressure be used for this purpose.
Automatic dispensing devices
(b)
(1) The installation and use of coin-operated dispensing devices for Class I flammable liquids is prohibited. The dispensing of Class I flammable liquids into the fuel tank of a vehicle or into a container shall at all times be under the control of a competent person. The use of any device which permits the dispensing of Class I flammable liquids when the hand of the operator of the discharging nozzle is removed from the nozzle control lever is hereby forbidden except when using an automatic nozzle as provided in paragraph (2) of this subsection.
(2) Automatic Hose Nozzle Valves with Latch-Open Devices. In lieu of being held open by hand, an approved automatic nozzle may be used for dispensing Class I flammable liquid into the fuel tank of a vehicle. Such a nozzle shall have the latch-open device as an integral part of the assembly and shall shut-off the liquid reliably and positively when the gasoline tank is filled, when it falls from the filling neck of an automobile tank, when it is subject to rough usage such as dropping or lack of proper lubrication, or when an automobile is driven away while the nozzle is still in the tank. A competent attendant shall be in the immediate vicinity of the vehicle being filled by such an approved nozzle.
Location
(c) Dispensing devices at automotive service stations shall be so located that all parts of the vehicle being served will be on private property.