Automatic nozzles with latch-open devices. In lieu of
being held open by hand, an approved automatic nozzle may be used for dispensing
Class I flammable liquids 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.