Medicinal cannabis and workplace testing in Western Australia
WHS Act 2020 (WA) — WorkSafe WA published medicinal cannabis guidance Jan 2025 Last verified:
Unfair dismissal is federal law — the Fair Work Act and the case database apply the same in every state. What changes in Western Australia is the layer around it: the safety statute, the discrimination statute, the roadside rules, and where to get help.
How the layers stack in WA
- Dismissal and general protections: federal — Fair Work Act 2009, the 21-day deadline, and everything in the case database applies here unchanged.
- Work health and safety: Work Health and Safety Act 2020 (WA) - WA's recent adoption of the model law, administered by WorkSafe WA, with mining-specific fitness-for-work obligations continuing for that sector. This is the statute that grounds your employer’s duty to manage impairment risk — and their obligation to consult the workforce on the policy.
- Discrimination: Equal Opportunity Act 1984 (WA), alongside federal disability discrimination law. State and federal routes have different processes and deadlines — one reason early advice matters.
- Roadside: No general prescription defence for detectable THC while driving as at our last review. Roadside law is its own minefield — our companion driving-law hub covers WA in detail.
What’s distinctive about WA
WorkSafe WA published dedicated guidance on medicinal cannabis in the workplace in January 2025 - regulator-level confirmation that pre-cannabis policies need updating. FIFO mining dominates the risk landscape here: frequent random testing, zero-tolerance site standards, and rosters that compress the gap between dosing and shift.
Getting help in Western Australia
For individual advice: Legal Aid WA, community legal centres, and the Fair Work Commission. Free first consultations are common at employment firms — the Dismissal Response Kit’s lawyer briefing pack is designed to make those first calls count.