The officer did not turn his mind as to whether the test should have been delayed due to the presence of residual mouth alcohol. (bestimpaireddefence.ca)
The effect of having mouth alcohol present in the subject during breath testing on an approved screening device is that the reliability of the sample given is thought to be questionable. (yourlegalbutler.com)
The topic of residual mouth alcohol is a common one in any discussion about drinking driving laws. (vancouvercriminallaw.com)