Mitchell Jacka v Australian Capital Territory and Chief Executive of the Department of Justice and Community Safety of the Australian Capital Territory

Mitchell Jacka brought proceedings against the Australian Capital Territory and the Chief Executive of the Department of Justice and Community Safety of the Australian Capital Territory. The dispute centred on the validity of certain sections of the Crimes (Sentence Administration) Act 2005 (ACT). Specifically, Jacka challenged sections 68(2)(f), 69, 79, and 82 of the Act, contending that they were unconstitutional and beyond the legislative powers of the ACT. The case was heard in the Supreme Court of the Australian Capital Territory.

The court was required to decide whether the challenged sections of the Act were valid. This involved examining the legislative power of the ACT and the implications of the decisions in Lewis v Chief Executive of the Department of Justice and Community Safety [2013] ACTSC 198. The court had to determine whether the Sentence Administration Board's decisions constituted an exercise of judicial power, and whether there was any interference with or impairment of the institutional integrity of the ACT Courts by vesting power in the Board.

The court found that the decisions in Lewis were decisive and that the Sentence Administration Board's decisions did not constitute an exercise of judicial power. It held that there was no doctrine of separation of powers in the ACT that prevented the vesting of judicial power in the Board. Additionally, the court concluded that there was no interference with or impairment of the institutional integrity of the ACT Courts by investing power in the Board. Consequently, the court held that the challenged sections of the Crimes (Sentence Administration) Act 2005 (ACT) were valid. The proceedings were dismissed.