Administrative law — Judicial review — Habeas corpus — Certiorari — Validity of Orders in Council — Improper or extraneous purpose — Failure to take into account relevant considerations — Power to establish centres for detention of young persons — Use of power to establish remand centre and youth justice centre within adult jail for the purpose of ‘emergency accommodation’ — Children, Youth and Families Act 2005 (Vic) ss 478, 482, 484

Human rights — Charter of Human Rights and Responsibilities — Children — Protection from cruel, inhuman or degrading treatment — Protection of child in their best interests – Humane treatment when deprived of liberty — Public authorities — Obligation to give proper consideration to human rights — Effect of failure to give proper consideration — Declarations — Charter of Human Rights and Responsibilities Act 2006 (Vic) ss 10(b), 17(1), (2), 22(1), 38(1)

Administrative law — Judicial review — Habeas corpus — Jurisdictional error — Validity of Orders in Council — Jurisdictional fact — Power to establish centres for detention of young persons — Children, Youth and Families Act 2005 (Vic), ss 1, 3, 8, 9, 10, 11, 478, 482, 484, 487, 488

Administrative law — Judicial review — Jurisdictional fact — Power to exempt class of persons from prohibitions on possession and use of controlled weapons — Control of Weapons Act 1990 (Vic), ss 5A, 8B

Human rights — Charter of Human Rights and Responsibilities — Children — Protection of child in their best interests — Humane treatment when deprived of liberty — Public authorities — Obligation to act compatibly with human rights — Obligation to give proper consideration to human rights — Effect of failure to act compatibly with human rights or give proper consideration to human rights — Declarations — Injunctions — Charter of Human Rights and Responsibilities Act 2006 (Vic), ss 10(b), 17(1), 17(2), 22(1), 38(1), 39(1)