High Court of Australia

Plaintiff M96A/2016 v Commonwealth of Australia [2017] HCA 16

3 May 2017

Case Number: M96/2016

Before

Kiefel CJ, Bell, Gageler, Keane, Nettle, Gordon, Edelman JJ

Catchwords

Migration – Unlawful non-citizens – Power to detain – Where plaintiffs unauthorised maritime arrivals – Where plaintiffs brought to Australia from regional processing country for temporary purpose of medical treatment – Where plaintiffs detained under ss 189 and 196 of Migration Act 1958 (Cth) until removal from Australia – Whether ss 189 and 196 validly authorise detention while in Australia for temporary purpose – Whether plaintiffs detained for lawful purpose – Whether duration of detention capable of objective determination.

Words and phrases – "detention of non-citizen", "duration of detention", "opinion, satisfaction or belief of officer", "purpose of detention", "temporary purpose", "transitory person", "unauthorised maritime arrival", "unlawful non-citizen".

Constitution – s 51(xix).

Migration Act 1958 (Cth) – ss 189, 196, 198, 198AD, 198AH, 198B.
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