Unlawful failure to remove extends lawful detention: A critique of the decision in AJL20

Stephen McDonald

In this post, I offer a critique of one aspect of the reasoning of the majority judges in the Commonwealth v AJL20 (‘AJL20’), where it was held that AJL20’s detention was, at all times, lawfully permitted and required by the Migration Act, notwithstanding the failure of Commonwealth officers to comply with the duty to remove him as soon as reasonably practicable.

Essentially, the majority reasoning permits and requires detention by the executive to continue, even though the purposes for which detention can occur are constitutionally limited, and even though the detention exceeds what is reasonably necessary to give effect to the permissible purposes established by the Migration Act. I argue that, in construing the Migration Act in this way, the majority in AJL20 have implicitly given it an operation that authorises and requires continuing executive detention in excess of constitutional limits if officers of the executive have failed to comply with other duties imposed on them by the Act.