Background
The appellant was convicted in the District Court of supplying a prohibited drug — psilocybin — in an amount not less than the commercial quantity, contrary to s 25(2) of the Drug Misuse and Trafficking Act 1985 (NSW) (DMT Act). The charge arose from police finding 98 grams of dried magic mushrooms in resealable bags in the appellant's car during a lawful search.
Before trial, a voir dire resolved a threshold question of construction: when calculating the weight of psilocybin for the commercial quantity threshold, does the weight include the mushroom material in which psilocybin naturally occurs — or only the extracted psilocybin compound? The trial judge held the mushroom weight counted in full. The appellant was convicted and appealed.
Legal Issues
- Does the phrase "preparation, admixture, extract or other substance containing any proportion of the prohibited drug" in s 4 of the DMT Act extend to natural organic material (mushrooms) in which a prohibited drug naturally occurs?
- Does s 4 require deliberate human involvement in mixing or preparation, or does it apply to any substance — artificial or natural — that contains the drug?
Decision
The Court of Criminal Appeal (Mitchelmore JA and Wilson J, Rothman J agreeing in the result) dismissed the appeal.
Mitchelmore JA (Wilson J agreeing) held that the phrase "other substance containing any proportion of the prohibited drug" captures any material that contains a prohibited drug alongside other material — without requiring human involvement in the mixing or preparation. The focus of s 4 is on the fact of mixed contents, not on how they came to be mixed. A mushroom containing psilocybin is plainly a substance that contains the prohibited drug; the total dried weight therefore counts toward the Schedule 1 quantity threshold.
Her Honour rejected the argument that the surrounding words ("preparation, admixture, extract") implied a requirement of deliberate human mixing. The provision's purpose is to prevent offenders from pointing to low active-ingredient concentrations to fall below quantity thresholds — a purpose served equally whether the dilution is artificial or naturally occurring.
Rothman J took a broader approach: in ordinary usage, a magic mushroom is itself a consumable form of the drug. The Schedule 1 reference to psilocybin and psilocin extends to the mushrooms in which they are found, and the weight of the drug is the weight of the drug in that mushroom form.
Orders Made
- Appeal against conviction: dismissed
Key Takeaways
- The Court of Criminal Appeal held that the entire dried weight of magic mushrooms counts toward the psilocybin commercial quantity threshold under s 4 of the DMT Act, not just the extracted active compound.
- Under s 4 of the DMT Act, no human involvement in mixing or preparation is required: the provision applies equally to naturally occurring substances in which a prohibited drug is found.
- A low concentration of psilocybin within the mushroom material does not bring the total weight below the commercial quantity threshold, as the statutory focus is on the fact of mixed contents rather than potency.
- In dismissing the appeal, the Court confirmed that its reasoning was consistent with prior authority on LSD in liquid and cardboard (Finch v R [2016] NSWCCA 133), reinforcing the broad construction of s 4 in favour of counting total substance weight.
- The quantity threshold was genuinely contested at trial through a voir dire on the admixtures question, making the construction of s 4 the central issue on appeal.
Legislation and Cases Referenced
Legislation
- Drug Misuse and Trafficking Act 1985 (NSW), ss 4, 25(2), Sch 1
Key cases
- El Kheir v R [2019] NSWCCA 288 — admixtures construction
- Finch v R [2016] NSWCCA 133 — LSD admixtures (consistent approach)
- Alcan (NT) Alumina Pty Ltd v Commissioner of Territory Revenue (2009) 239 CLR 27 — statutory construction
- CIC Insurance Ltd v Bankstown Football Club Ltd (1997) 187 CLR 384 — purposive construction