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(詳細は''Criminal Code'' to describe a portable measuring instrument that a police officer can use to gather evidence related to blood alcohol content and the detection of the drunk driving offence of driving "over 80." If the police officer believes that a motorist has consumed alcohol prior to driving, the officer can make a demand for a breath sample to be tested by the approved screening device at the roadside. The results of the screening device test are not admissible in court as proof of blood alcohol level. However, if the driver fails the screening device test, the officer can make a demand for a further test using an "approved instrument" at a police detachment which can be used to gather evidence that is admissible in a criminal prosecution. Where the driver displays significant signs of impairment such as bad driving behaviour or physical signs of intoxication, the officer does not need to use the screening device, but can immediately serve a demand for a breath sample for testing by the approved instrument. ==Criminal offence of driving "over 80" == Canada's criminal law creates two offences of drunk driving: driving while impaired by alcohol or a drug, and driving with a blood alcohol content greater than "eighty milligrams of alcohol in one hundred millilitres of blood," colloquially referred to as "over 80" or ".08" (i.e. "point-zero-eight").〔(''Criminal Code'', RSC 1985, c C-46, s 253(1). )〕 To gather evidence for the .08 offence, the ''Criminal Code'' provides for roadside screening, using an "approved screening device", and further testing if needed at a police detachment, using an "approved instrument", such as a breathalyzer. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Approved screening device」の詳細全文を読む スポンサード リンク
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