Drivers using prescribed medicinal cannabis in New South Wales could soon avoid automatic drug-driving charges under major new reforms proposed by the state government.

The NSW Labor government plans to introduce a legal THC limit for medicinal cannabis patients, marking one of the biggest changes to drug-driving laws in Australia in recent years.

Under the proposal, prescription cannabis users would no longer face penalties simply for having trace amounts of THC in their system, provided they remain below the new legal threshold.

How The Proposed THC Limit Would Work

The reforms would allow registered medicinal cannabis patients to legally drive if laboratory testing shows less than 50 nanograms per milliliters of THC in their saliva.

Currently, NSW law makes it illegal for drivers to have any detectable amount of THC in their system, regardless of whether the cannabis was legally prescribed.

Roads Minister Jenny Aitchison said roadside procedures would remain largely unchanged, with drivers still subject to immediate temporary driving bans after testing positive.

However, laboratory analysis would later determine whether the THC concentration exceeded the legal limit.

New Warning System Before Charges Apply

Under the proposed system, medicinal cannabis patients who exceed the threshold would receive two warnings before criminal penalties apply.

Those warnings would reset every two years, allowing patients time to better understand how medication timing and dosage affect their driving eligibility.

A third offence would trigger standard NSW drug-driving penalties, including fines and license suspensions.

Patients would also need to register their prescription with Transport for NSW and complete education training about how cannabis can affect driving ability.

Why The Debate Is Dividing Politicians

Supporters of the reform argue current laws unfairly punish people who legally use medicinal cannabis to manage chronic pain, anxiety, PTSD, insomnia, and other health conditions.

Former marine Jason Frost said the current system forces many patients to choose between taking medication or risking losing their license.

Independent MP Alex Greenwich, who has publicly spoken about using medicinal cannabis himself, described the reforms as giving patients “a new level of freedom and opportunity.”

However, critics argue there is still insufficient scientific evidence linking specific THC levels to driver impairment.

Opposition Leader Kellie Sloane called the proposal “reckless,” warning that cannabis affects individuals differently and impairment cannot yet be measured as clearly as alcohol.

Road Safety Concerns Remain

Road safety groups have also raised concerns about the changes.

NRMA spokesperson Peter Khoury argued the policy could create new safety risks despite acknowledging the mobility challenges faced by medicinal cannabis patients.

Government figures showed around 8 percent of fatal crashes in NSW between 2019 and 2023 involved drivers with THC detected in their system, although the data did not determine fault or whether impairment was present.

The NSW government says the new system would be closely monitored and formally reviewed after its first year in operation.

If passed, the reform would apply only to unrestricted license holders and would not exempt drivers from further testing after serious crashes.