Following a saliva drug screening test, a blood test may be required when a driver has been involved in a crash or an incident (resulting in injury or death) involving a motor vehicle and has two positive drug screening tests.

A driver may also be required to provide a blood sample if they are unable to provide sufficient saliva for a test or sample.

A blood test can also be taken when a compulsory impairment test (CIT) is not satisfactorily completed or following hospitalisation where a driver has been involved in a crash or an incident involving a motor vehicle.

If drugs are detected in a blood test, it could result in an infringement or criminal charge depending on the drug-blood concentration found by laboratory analysis.