To prove possession of a prohibited drug under s 6(1)(a) of the Misuse of Drugs Act 1981 (WA), the prosecution must prove: (1) control, dominion, order or disposition of the drug; (2) knowledge that the substance is, or is likely to be, a prohibited drug (without needing to prove knowledge of the specific type of drug); and (3) on current authority (Davis v The Queen), intention to possess, though proof of knowledge will normally suffice for this element. The correctness of the requirement to prove intention to possess as a separate element was doubted but not decided. Where inadmissible hearsay evidence is admitted that is relevant to an issue on which the accused bears the onus of proof (such as intent to sell or supply), the proviso cannot be applied if the effect of the evidence on the jury cannot be assessed.
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