At Jonathan Lapid, we believe that clear, practical information helps people stay calm and make smart decisions. This page explains the DUI code of conduct in Toronto in plain language: what the law expects from drivers, what police must follow, and what happens after a charge.
Strict federal and provincial laws govern a DUI (driving under the influence), legally referred to as impaired operation in Canada. Police enforce these laws actively across Toronto and the GTA.
What is considered a DUI in Toronto?
Before you can understand your responsibilities, you need to know what legally qualifies as impaired driving. Many drivers assume DUI only applies when someone is clearly intoxicated. In reality, the legal definition is much broader.
In Toronto and across Ontario, you can face DUI charges or penalties if you:
- Drive with a blood alcohol concentration (BAC) of 80 mg of alcohol per 100 mL of blood or more
- Drive while impaired to any degree by alcohol, drugs or cannabis
- Refuse to provide a breath test when lawfully demanded
- Drive while over the legal drug concentration limits
- Register a BAC between 50 and 79 mg (the "warn range," which brings provincial penalties rather than a criminal charge)
These rules apply whether you were stopped at a RIDE checkpoint, during a traffic stop, or after an accident. Even first-time offenders face serious consequences. Our article on what happens at a RIDE checkpoint explains a typical check stop.
The DUI code of conduct: what the law requires from drivers
When you hold a valid Ontario driver's licence, you agree to follow certain legal obligations. These obligations form part of what we call the DUI code of conduct. They are not optional. Failing to follow them can lead to immediate penalties and criminal charges.
You must provide a breath sample
Under the Criminal Code, police can demand a roadside breath sample from a lawfully stopped driver without prior suspicion. If an officer lawfully demands a sample:
- You must comply
- You must provide the sample immediately
- You cannot delay the test to speak with a lawyer before roadside screening
- You must follow instructions regarding additional testing at the station
The law treats refusing to comply just as seriously as failing the test. A refusal can result in:
- Immediate licence suspension
- Vehicle impoundment
- Criminal charges
- Penalties at least as severe as a DUI conviction, including a minimum fine of $2,000 on a first offence
Many people make the mistake of thinking refusal protects them. In reality, it often makes the situation worse. Complying while protecting your legal rights is critical, and our article on refusing a breathalyzer in Ontario explains what counts as a refusal.
You must remain at the scene
If police stop you for suspected impaired driving, the law requires you to remain at the scene. This applies whether the stop happens during routine patrol, at a RIDE checkpoint, or after a collision.
You must:
- Stay in your vehicle unless instructed otherwise
- Provide your driver's licence, registration and proof of insurance
- Follow lawful instructions from police
Attempting to leave the scene or refusing to cooperate can lead to additional criminal charges. These added charges can complicate your case and increase potential penalties. Remaining calm and cooperative helps prevent unnecessary escalation.
You must not drive while suspended
If you receive a licence suspension, whether administrative or court-ordered, you must not drive under any circumstances. Many drivers underestimate how strict this rule is. Suspensions may include:
- A 24-hour suspension
- A 3-day, 7-day or 30-day roadside suspension
- A 90-day Administrative Driver's Licence Suspension (ADLS)
- A court-ordered driving prohibition after conviction
Driving while suspended can result in:
- Heavy fines
- Extended suspension periods
- Possible jail time
- Vehicle impoundment
Even driving a short distance can trigger new charges, and driving during a court-ordered prohibition is a criminal offence in itself; our article on driving while disqualified explains the difference. Respecting the suspension terms protects you from compounding the problem. For the full list of what a conviction can bring, see our guide to fines and prohibitions for impaired driving.
What police must follow under the DUI code of conduct
The DUI code of conduct does not apply only to drivers. Police officers must also follow strict legal procedures. If they fail to follow proper steps, you may be able to challenge the evidence against you in court. This is one of the most important parts of DUI defence.
Lawful traffic stop
Police must have legal authority to stop your vehicle. In Toronto, this can include:
- Random roadside stops
- RIDE (Reduce Impaired Driving Everywhere) programs
- Stops related to traffic violations
- Investigations following accidents
However, the stop must still comply with the Charter of Rights and Freedoms. If police violated your rights, it may affect the case against you.
Proper testing procedures
In many cases, the Crown's entire case depends on the accuracy and reliability of test results. Breath and blood testing must follow strict technical rules. Officers must:
- Use approved screening devices and approved instruments
- Conduct tests within required time limits
- Follow proper calibration procedures
- Maintain accurate records
- Inform you of your rights
At Jonathan Lapid, we review every detail carefully. Even small mistakes in procedure can affect the outcome of a case. Our DUI defence guide explains how we examine breath evidence and police procedure.
Your rights after a DUI arrest in Toronto
While the law imposes obligations, it also protects you. Understanding your rights is just as important as understanding your responsibilities. After arrest, you have the right to:
- Be informed of the reason for your detention or arrest
- Speak to a lawyer without delay (after roadside screening)
- Be informed of your Charter rights
- Challenge the evidence in court
- Receive full disclosure of the Crown's case
Exercising these rights properly can change the direction of your case. Saying too much or making assumptions can harm your defence. Early legal guidance matters, so seek legal help as quickly as you can, and read what to do in the first 72 hours.