The division of responsibility
| Stage | Who decides | What they decide |
|---|---|---|
| Define offences and defences | Parliament and, where applicable, common law | What conduct is criminal and what can justify or excuse it |
| Interpret legal requirements | Courts, applying binding appellate precedent | What the legal rules mean |
| Present the case | Prosecution and defence | Which evidence and arguments to put forward, subject to disclosure and procedural obligations |
| Resolve legal disputes | Trial judge | Admissibility and whether a proposed defence has a sufficient legal and evidential foundation |
| Reach the verdict | Jury | What facts are proved and whether applying the directed law establishes guilt |
Wang explains that jurors find facts and apply the law as directed by the judge. The table is a simplified map of that division, not a claim that every issue fits neatly into a factual or legal box. Admissibility hearings can themselves require a judge to resolve factual disputes; that is different from taking over the jury’s decision on guilt.
[1] paras 8, 12–13 · [2] s 40(1)The institutional case for this division is consistency, protection against unfair evidence, and reviewable legal rulings. The objection is equally important: controlling the inputs can shape the outcome. Jurors cannot assess evidence they never receive. Whether that control is justified depends on the particular legal rule, the evidence and the reasons given—not simply on calling the excluded material irrelevant.
[3] s 78(1) · [4] s 2 · [1] paras 12–13