Police v Hanton

In Police v Hanton, the appellant was convicted of driving offenses and appealed the decision. The central issue before the court was whether the statutory test required by the Road Traffic Act (RTA) s 175(3)(ba) was properly administered to demonstrate the accuracy of the Traffic Signal Analyser (TSA). The court had to determine if the statutory test was correctly performed and whether the prosecution's presumption was applicable. The court found that the statutory test was not properly conducted, as it failed to show the TSA's accuracy to the specified extent indicated in the certificate. This finding meant that the prosecution could not rely on the statutory presumption, and the evidence presented was insufficient to support the charges.

The court's reasoning was based on the statutory requirement for a transparent and proximate test to demonstrate the TSA's accuracy. The internal procedures of the South Australian Police (SAPOL) could not substitute for the statutory test. The court emphasized that the statutory test must be conducted near the time of the driving incident and must clearly show the TSA's accuracy to the extent specified. The calibration check, although permissible, could not replace the statutory test. The court also noted that the prosecution's tactical decisions, such as not calling certain expert witnesses, were relevant to the determination of the appropriate remedy.

In conclusion, the court found that the statutory test was not correctly administered, and thus, the prosecution's presumption did not apply. Given the tactical decisions made by the prosecution, the court determined that a re-trial would not be appropriate. Instead, the complaint should be dismissed with no order for a re-trial. The critical takeaway was that the statutory test must be independently verifiable and distinct from any internal procedures or additional tests conducted by SAPOL.