Northern Territory Consolidated Acts Northern Territory Consolidated Acts38. Proof of speed
(1) A person shall not be found guilty of an offence of or relating to exceeding a prescribed speed limit solely on the evidence of one witness to the effect that, in the opinion of the witness, the person was driving the vehicle at a speed faster than that permitted for that vehicle.
(2) A complaint for an offence of or relating to driving a vehicle at a speed exceeding a prescribed speed limit shall specify the speed at which, or faster than which, it is alleged the defendant drove the vehicle.
(3) Evidence may be given in any proceedings in a court for the purpose of showing the speed at which a vehicle was travelling at a particular time by reference to the calculation of the speed of that vehicle as shown on a traffic infringement detection device and, where evidence is so given, it shall be prima facie evidence that the vehicle was travelling at the speed so calculated at that time.