Drink or Drug Driving Charge? Protect Your Licence and Your Future

Most Australian states categorise drink driving offences by blood alcohol concentration (BAC): low-range (0.05–0.079), mid-range (0.08–0.149), and high-range (0.15 and above). In NSW, low-range first offences attract automatic disqualification of 3 months; mid-range first offences attract 6 months; high-range first offences attract 12 months minimum. Victoria, Queensland, Western Australia, South Australia, and other states have comparable tiered structures with similar principles. Penalties for second and subsequent offences are significantly higher and typically include mandatory minimum terms of imprisonment for high-range repeat offending.

Alcohol interlock orders are mandatory in most states for mid-range and high-range drink driving offences, and for repeat offenders regardless of BAC category. The interlock period applies after the disqualification period ends — you must install the device in your vehicle and demonstrate a period of alcohol-free driving before your full licence is reinstated. Interlock exemptions are available in limited circumstances, such as financial hardship (inability to afford the device) or medical grounds. A lawyer can advise on whether an exemption application is viable in your state.

Courts have discretion to impose periods of disqualification above the mandatory minimum but can also, in some jurisdictions, impose the minimum. In NSW, for example, courts can impose automatic or minimum disqualification depending on the offence and whether an interlock order is attached. Strong mitigation — demonstrating remorse, early guilty plea, good traffic history, rehabilitation steps such as completing a traffic offender program, and the impact of the penalty on employment — can influence the court to impose the minimum period. A lawyer experienced in drink driving matters knows what evidence resonates in your local court.

Technical defences exist but are limited. For drink driving, defences may include: the breath analysis or blood test procedure was not followed correctly; the reading was affected by a residual mouth alcohol (recent ingestion defence); the device was not properly calibrated or maintained; or the person was not driving (control of the vehicle was not established). For drug driving, defences include procedural errors in collection, storage, or analysis of samples. Where technical defences are available, they can result in the charge being dismissed. A lawyer can review the prosecution brief and identify any arguable grounds.

Interlock exemptions are available in some states on grounds including financial hardship (inability to meet the cost of installation and monthly fees), medical reasons (conditions incompatible with using the device), or where the applicant does not own or have access to a vehicle. In NSW, exemption applications are made at the time of sentencing. The court or Roads and Maritime Services authority considers the application. Exemptions are not commonly granted and require strong supporting evidence — a lawyer can advise whether your circumstances are likely to succeed and prepare the application.

A drink driving conviction recorded on your licence may affect your commercial vehicle entitlement (heavy vehicle, bus, or dangerous goods licence) under the Heavy Vehicle National Law and state equivalents. Professional registration bodies — including AHPRA (health practitioners), the Law Society, and teacher registration boards — may also require disclosure of traffic convictions and have their own disciplinary processes. The consequences vary significantly by profession and registration scheme. Understanding these secondary implications before you enter a plea can make a material difference to how you manage the matter.