As to issue (i)
Per Bell CJ, Payne JA and Sweeney J (Basten AJA and Dhanji J agreeing)
(1) The usage of the phrase "prohibited drug" in s 25(2) of the Drug Act refers to the actual prohibited drug the accused has supplied or has knowingly taken part in the supply of, not to a prohibited drug that an accused has mistakenly identified as being involved: [14].
(2) Any additional mental element, based on a defendant being mistaken as to the identity of the prohibited drug, is inconsistent with prior authorities which have established that an accused simply must know they are supplying "a" prohibited drug, not a "particular" prohibited drug: [20], [26].
Dunn v The Queen (1986) 32 A Crim R 203; Finch v R (2016) 259 A Crim R 407; [2016] NSWCCA 133; Hamzeh v R [2022] NSWCCA 232; Siafakas v R [2016] NSWCCA 100; Tabe v The Queen (2005) 225 CLR 418; [2005] HCA 59 applied. R v Busby [2018] NSWCCA 136 disapproved of.
Per Basten AJA (Bell CJ, Payne JA, Sweeney and Dhanji JJ agreeing)
(3) Section 25(2) is not unique in specifying a relevant amount of a prohibited drug. Section 25(1), at least where s 29 is relied on, depends upon establishing an amount, namely a traffickable quantity: [71].
(4) The mental element of an offence under s 25(2) requires that the accused knows or believes that the substance in their possession is a prohibited drug and also knows, in the accepted sense, that the quantity of the drug is of the order of the quantity defined by the law as either a large commercial quantity or a commercial quantity. As such, the accused does not have to have any knowledge or belief as to the actual drug, nor as to the legal significance of the quantity: [126].
Cheng v The Queen (2000) 203 CLR 248; [2000] HCA 53; He Kaw Teh v The Queen (1985) 157 CLR 523; [1985] HCA 43; Sgarlata v Western Australia (2015) 49 WAR 176; [2015] WASCA 215; Siafakas v R [2016] applied. R v CWW (1993) 32 NSWLR 348 distinguished. R v Busby disapproved of.
Per Dhanji J:
(5) Additional observations about framing of indictment where an aggravating factor exists resulting in a higher maximum penalty: [155]-[166].
Cheng v The Queen (2000) 203 CLR 248; [2000] HCA 53, The Queen v Meaton (1986) 160 CLR 359; [1986] HCA 27 and Kingswell v The Queen (1985) 159 CLR 264; [1985] HCA 72 considered.