Drivers aged 20 or over: you must not drive with more than 250 micrograms of alcohol per litre of breath, or more that 50 milligrams of alcohol per 100 millilitres of blood. Any and all illicit drug use before driving is illegal.
The officer marks your driving skills as you complete these tasks. Several times, the testing officer will ask you to talk about the hazards you see and what you’re doing in response.