For around a decade, medicinal cannabis has been a legally prescribed medicine in New South Wales—yet patients who take it have faced a difficult problem on the road. Under current drug-driving laws, simply having THC present in your system while driving can be an offence, even if you are not impaired and even if the cannabis was lawfully prescribed by your doctor. The NSW Government has now introduced legislation to change that. This article explains the current law, the reform, and what it would mean for prescribed cannabis patients who drive.
NSW drug-driving law works differently from drink-driving law. Random breath testing for alcohol measures concentration—how much is in your system. Roadside drug testing, by contrast, simply detects whether certain drugs are present at all. Police have roadside-tested for four substances since the regime began, including THC, the active component of cannabis.
Because the offence is based on presence rather than impairment, a prescribed patient can test positive—and be charged—long after any effect of the medicine has worn off. A first offence for driving with an illicit drug present currently carries an on-the-spot fine and an immediate three-month licence disqualification. This has created a genuine anomaly: patients prescribed other psychoactive medicines, such as opioids or benzodiazepines, are not tested for traces of their medication in the same way.
The NSW Government has introduced the Road Transport Amendment (Medical Cannabis and Driving Offences) Bill 2026. At its heart, the reform means that eligible medicinal cannabis patients would no longer be automatically penalised under the drug-presence offence simply because THC is detected—provided they are not impaired and meet strict conditions. The Government has described it as a cautious, carefully safeguarded change rather than a free pass.
The change responds to a recommendation of the 2024 NSW Drug Summit, and to years of campaigning. With an estimated 300,000-plus medicinal cannabis users in NSW, it affects a large and growing group of people who rely on their prescriptions to work, care for family and go about daily life.
The exemption is not automatic—a patient must opt in by registering with Transport for NSW. To register, a driver would need to:
Once registered, the driver’s status is recorded on their licence record and digital driver licence. Registration is voluntary, but it is the only way a patient could access the new protections.
Importantly, the reform does not change what happens at the roadside. Registered patients would still be subject to roadside drug testing like everyone else, and a positive roadside test would still result in an immediate 24-hour driving ban while the sample is sent for laboratory analysis. The new approach applies after the laboratory result, when a decision is made about whether the driver is exempt, or whether a new registered-user offence applies.
For registered patients, the Government has proposed a graduated, warning-based system rather than immediate penalties. A first and second detection would result in a warning letter—giving the driver an opportunity to review and discuss their medication and driving with their doctor—with no other penalty. A third positive detection within a two-year period would become an offence, attracting penalties including loss of licence. This is the “two strikes” structure that has been widely reported.
The protection is deliberately narrow. It would not apply—and standard drug-driving offences would continue—where:
A registered patient who drives while genuinely impaired can still be charged with serious driving-under-the-influence offences. Patients would also remain subject to blood and urine testing following serious or fatal crashes. The scheme is to be reviewed twelve months after it begins.
The reform has its critics on both sides. Some road-safety bodies have argued that any softening risks complicating enforcement and undermining the road toll. Reform advocates, meanwhile, have welcomed the defence but raised concerns about practicalities—particularly that a register of medical cannabis drivers would be accessible to police, and how that information might be used. As with any bill before parliament, the detail may change before it becomes law.
Until the bill is passed and commences, the current law still applies: it remains an offence to drive with THC present in your system, including for prescribed patients. If you have been charged with a drug-driving offence involving medicinal cannabis, the outcome can turn on fine details—whether you were impaired, what the laboratory result showed, and how the evolving law applies to your situation.
Our experienced traffic lawyers can advise you on drug-driving charges, represent you in court, and help you understand your rights. Contact NS Criminal Lawyers for a confidential discussion about your matter.
This article provides general information only and is not legal advice. It describes a Bill before the NSW Parliament that had not commenced as law at the date of publication; the current drug-driving laws continue to apply until any reform takes effect. For advice about your circumstances, please contact a qualified lawyer.
