For conviction of slavery offences under s 270.3(1)(a), the prosecution must prove not only that the accused knew the victim was in the condition of slavery, but also that the accused intentionally exercised power over the victim in the knowledge or belief that she was treating the victim as mere property — it is not sufficient that the accused exercised control in the belief she was acting as employer or contractor. The slavery provisions are constitutionally valid under the external affairs power as implementing the 1926 Slavery Convention. The offences are not confined to persons who could be characterised as slave 'owners'.
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