Limits on Non-Statutory Executive Power: Davis v MICMSMA; Davis v Secretary of Department of Home Affairs [2023] HCA 10 

Maria O’Sullivan

The recent High Court decision in Davis v Minister for Immigration; DCM20 v Secretary of Department of Home Affairs contains some important statements on the reviewability of non-statutory ministerial guidelines. The key questions before the High Court were whether the Court could determine whether non-statutory executive action by federal departmental officers was unlawful on the ground of legal unreasonableness, and whether the guidelines used by officers to ‘screen’ visa applications to be presented to the Minister were valid.