In Palmer & Anor v The State of Western Australia & Anor  HCATrans 180 the High Court was asked whether the Quarantine (Closing the Border) Directions (WA) and/or the authorising Emergency Management Act 2005 (WA) were invalid because they impermissibly infringe section 92 of the Constitution. The court responded that on their proper construction, ss 56 and 67 of the Emergency Management Act 2005 (WA) in their application to an emergency constituted by the occurrence of a hazard in the nature of a plague or epidemic comply with the constitutional limitation of section 92 of the Constitution in each of its limbs.
The detailed reasons were later published in Palmer v Western Australia  HCA 5.
- https://jade.io/article/774754 https://freemandelusion.com/wp-content/uploads/2022/03/Palmer-Anor-v-The-State-of-Western-Australia-Anor-2020-HCATrans-180.pdf
- https://jade.io/article/788038 https://freemandelusion.com/wp-content/uploads/2018/07/palmer-v-the-state-of-western-australia-2021-hca-5.pdf