For years, New South Wales has maintained some of Australia’s strictest drug driving laws. Drivers could be prosecuted simply because THC was detected in their oral fluid or blood, even if they were legally prescribed medicinal cannabis, were not impaired, and had taken their medication exactly as directed by their doctor.
That position may soon change.
On 25 June 2026, the Minns Labor Government introduced the Road Transport Legislation Amendment (Medical Cannabis and Driving Offences) Bill 2026 into the NSW Parliament. If passed, the legislation will represent one of the most significant reforms to NSW drug driving laws in decades.
The Current Law Remains Unchanged
It is important for drivers to understand that the proposed reforms have not yet become law.
At the time of writing, motorists can still be charged with a drug driving offence if THC is detected during roadside testing, even where:
- the cannabis was lawfully prescribed;
- the driver was using the medication for a legitimate medical condition; and
- there is no evidence that the driver was actually impaired.
Until Parliament passes the Bill and the new laws commence, the existing drug driving laws continue to apply.
What Will Change?
The proposed legislation aims to introduce a more balanced approach between road safety and the legitimate medical use of cannabis.
Rather than automatically criminalising every prescribed medicinal cannabis patient who tests positive for THC, the Bill proposes a new framework that recognises lawful medical treatment while maintaining strict safeguards for road safety.
The reforms are intended to ensure that patients who responsibly use prescribed medicinal cannabis are not unfairly penalised solely because traces of THC remain in their system, provided they satisfy the legislative requirements and are not impaired while driving.
Why the Reform Matters
Thousands of Australians are now prescribed medicinal cannabis to manage conditions including chronic pain, cancer-related symptoms, epilepsy, multiple sclerosis, anxiety and other serious medical conditions.
Unlike alcohol, THC can remain detectable long after its impairing effects have worn off. As a result, many patients have found themselves facing criminal charges despite posing no measurable danger to other road users.
The proposed reforms acknowledge this growing medical reality while continuing to prioritise public safety.
A Word of Caution
The announcement of these reforms has understandably generated excitement among medicinal cannabis patients. However, many people mistakenly believe the laws have already changed.
They have not.
Until the legislation is passed and formally commenced, NSW Police retain the power to prosecute drivers under the existing drug presence offences where THC is detected.
Anyone prescribed medicinal cannabis should continue to exercise caution before driving and obtain appropriate legal advice if charged with a drug driving offence.
How Harvard Defence Lawyers Can Help
Drug driving charges can have significant consequences, including licence disqualification, fines, criminal convictions and impacts on employment.
At Harvard Defence Lawyers, we regularly represent clients charged with drug driving offences across New South Wales as well as Australia Wide. We stay at the forefront of legislative developments and are committed to ensuring our clients receive accurate advice based on the law as it currently stands—not as it may become.
If you have been charged with a drug driving offence or wish to understand how the proposed medicinal cannabis reforms may affect you, contact Harvard Defence Lawyers for confidential legal advice tailored to your circumstances.
