A control lever arm, knob, handle, or other
convenient and effective means shall be provided to set the taximeter
mechanism for the desired operating condition and to clear the taximeter.
The several positions of the control lever shall
be mechanically defined and displacement from any one of these positions
shall be sufficiently obstructed that the accidental or inadvertent
changing of the operating condition of the taximeter is improbable.
Possible movement of this control to an operating position immediately
following its movement to be cleared position shall be automatically
delayed enough to permit the taximeter mechanism to come to a complete
rest in the cleared condition.
If the control for the operating condition is
a lever arm and flag, the flag shall be at its highest position when
the taximeter is cleared, and in this position, the whole of the flag
shall be above the level of the taximeter housing.
The knob, handle or other means provided to
actuate the extras mechanism shall be inoperable whenever the taximeter
is cleared.
The construction of a taximeter shall be such
that there will be no interference between the time and the mileage
portions of the mechanism at any speed of operation corresponding
to a vehicle speed faster than the speed at which the basic rate of
mileage revenue equals the basic waiting-time rate. Specifically,
the registration of a taximeter in the "hired" condition shall agree
with its performance in the "Time not recording" condition within
one percent (1%).
Adequate provision shall be made for affixing
lead-and-wire seals to a taximeter and to other parts required for
service operation of a complete installation on a vehicle, so that
no adjustments, alterations, or replacements affecting in any way
the accuracy or indications of the device or the assembly can be made
without mutilating the seal or seals. The sealing means shall be such
that it is not necessary to disassemble or remove any part of the
device or of the vehicle to apply or inspect the seals.