The zero alcohol rule does not prohibit anyone from partying or drinking, but rather from driving after drinking. Do not replace alcohol by drugs: Just like drinking and driving, driving while high is a criminal offence. If you drink, smoke a joint or take any other drug, choose an alternative to driving.
Holders of a learner's licence or a probationary licence are also subject to the zero alcohol rule.
If your faculties are impaired by alcohol or drugs, the law doesn’t just prohibit you from driving a vehicle, but also from having care or control of a vehicle. Here are some examples of acts that may result in the same consequences as driving while impaired: