NSW Government to Set Legal THC Limit for Medicinal Cannabis Drivers

The New South Wales Labor government announced on June 4, 2026, that it will introduce a legal THC blood-concentration limit for medicinal cannabis drivers [1, 2].

This reform aims to resolve a long-standing legal ambiguity for patients who rely on prescribed cannabis for health reasons. Under current frameworks, the presence of THC in a driver's system can lead to prosecution regardless of whether the drug was legally prescribed, creating a barrier to mobility for thousands of residents.

The proposed changes will specifically target drivers who hold a valid medicinal cannabis prescription [1, 2]. By establishing a defined legal limit for the concentration of THC in the blood, the government intends to provide a clear standard for law enforcement and the judiciary. This shift is designed to ensure that patients can operate vehicles without the constant fear of prosecution, provided they remain under the specified limit [1, 2].

Road safety remains a primary concern in the drafting of these reforms. The government said the goal is to provide freedom to users while maintaining strict safety standards to protect other road users [1, 2]. The move acknowledges that THC can remain detectable in the body long after the impairing effects have worn off, a factor that has previously complicated roadside testing.

Officials said the reforms will be introduced to parliament to codify these limits into law ^[1]. This legislative step is expected to align New South Wales with evolving medical standards and patient rights across Australia. The government intends for the new limits to be based on a balance of clinical evidence and public safety requirements ^[2].