For the offence of attempted possession of unlawfully imported border controlled drugs where the real drugs have been substituted after importation, the 'substance' throughout s 307.5(1) refers to the real drug, not the dummy substance. A question trail that separately addresses the defendant's conduct regarding the actual contents and the original imported substance is not a misdirection where the oral directions correctly stated the elements. The defence under s 307.5(4) need not be left to the jury where the defendant has not adduced evidence meeting the legal burden of proving lack of knowledge that the drug was unlawfully imported. The practice of one firm acting for multiple co-defendants in criminal matters is strongly discouraged by the Queensland Court of Appeal.
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