Article 2 Prescribed device
The following device is hereby prescribed for the purposes of Article 23 of the Road Traffic Offenders (Northern Ireland) Order 1996, that is to say, a device designed or adapted for recording a measurement of the speed of motor vehicles by –
(a)
capturing by means of unattended cameras images of the motor vehicle at each of two pre-determined positions on the road;
(b)
digitally recording each image and the time at which it is captured; and
(c)
calculating the average speed of the motor vehicle over the distance between the two positions mentioned in paragraph (a) by reference to the times mentioned in paragraph (b).