Statutory scheme
4 Under the Act, provision is made for the installation and operation of two devices designed to detect speeding offences. The first is "an approved speed measuring device" (s 44(1) of the Act) and the second is "an approved camera recording device" (s 45(1)). Where the speed measuring device detects a vehicle exceeding the speed limit, the approved camera recording device takes a photograph of the vehicle, recording on the photograph the following information (as set out in s45(1)):
"(a) The speed at which any such vehicle is travelling (as measured by the approved speed measuring device), and
(b) the date on which the photograph is taken, and
(c) the time and location at which the photograph is taken, and
(d) the speed limit that, in accordance with the regulations, is applicable to the length of road or road related area at which the photograph is taken, and
(e) the direction in which the vehicle is travelling (that is towards or away from the device)."
5 The legislation recognises the obvious need for such devices to be accurate. It therefore requires that they be periodically checked. In the case of the approved speed measuring devices, that check must take place every 12 months, as prescribed by the Road Transport (Safety and Traffic Management) (Road Rules) Regulations 1999, regulation 156(c). The camera recording devices, on the other hand, must be checked and certified as accurate within 30 days before the day recorded on the photograph relied upon in the particular prosecution (s 47(5)(b) of the Act).
6 The Act makes provision for certificates to be admitted into evidence, where signed by authorised officers, certifying that each device has been tested and found to be accurate.
7 Section 46 of the Act dealing with approved speed measuring devices is in these terms:
"46(1) In proceedings for any offence in which evidence is given of a measurement of speed obtained by the use of an approved speed measuring device, a certificate purporting to be signed by an appropriate officer certifying that:
(a) The device is an approved speed measuring device within the meaning of this Act, and
(b) on a day specified in the certificate (being within the time prescribed by the regulations before the alleged time of the offence) the device was tested in accordance with the regulations and sealed by an appropriate officer, and
(c) on that day the device was accurate and operating properly, is admissible and is evidence (unless evidence to the contrary is adduced) of the particulars certified in and by the certificate.
46(2) If any such certificate is tendered in proceedings for an offence, evidence of the accuracy or reliability of the approved speed measuring device is not required in those proceedings unless evidence that the device was not accurate or not reliable has been adduced.
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8 In respect of approved camera recording devices, s 47 of the Act is expressed in these terms:
"47(1) In proceedings for an offence of driving at a speed in excess of a speed limit imposed by or under this Act or the Regulations evidence may be given of a measurement of speed obtained by the use of an approved speed measuring device and recorded by an approved camera recording device.
(2) In proceedings in which such evidence is given:
(a) the provisions of section 46 relating to the accuracy or reliability of the approved speed measuring device apply, and
(b) subsections (3)-(5) apply in relation to the approved camera recording device, and
(c) evidence that a photograph taken by an approved digital camera recording device bears a security indicator of a kind prescribed by the regulations is evidence (unless evidence to the contrary is adduced) that the photograph has not been altered since it was taken.
(3) A photograph tendered in evidence as a photograph taken by an approved camera recording device on a specified day at a specified location:
(a) is to be accepted as having been so taken (unless evidence to the contrary is adduced), and
(b) is evidence (unless evidence to the contrary is adduced) of the matters shown or recorded on the photograph.
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