(1) If under this Act
an officer may stop a vehicle, whether or not at a roadblock set up under
section 18, the officer may use any means that are reasonably necessary in the
circumstances to do so, including means that hinder or obstruct the passage of
other vehicles.
(2) Subsection (1)
does not authorise the use of means that are intended or are likely to cause
death or grievous bodily harm to any person, whether or not in a vehicle.
(3) An officer who
under this Act stops a vehicle in order to exercise a power in this Act in
respect of the vehicle —
(a) may
detain the vehicle for a reasonable period in order to exercise the power; and
(b) may
move the vehicle to a place suitable to exercise the power.