If police stop you, they can do a preliminary assessment of physical factors such as your behaviour, balance and coordination. If this assessment shows that you may be impaired by an illicit drug, you will need to give blood and/or urine samples.
You will be given a penalty if you are found guilty of Driving While Impaired. There are different penalties depending on whether it is your first offence or if you have had any drug offence before. The following table explains the different penalties that may apply when caught with illicit drugs in your system.