This article discusses the foundational concepts of law making, executive powers and oversight in Government and Public Law. It explores the Biosecurity Act 2015 and the Human Biosecurity (Stay at Home) Order 2020 in Australia, and how they reflect the nature of constitutionalism in the country. The article also covers the role of the Parliamentary Joint Committee for Human Rights in reviewing the Human Biosecurity (Stay at Home) Requirements Order 2020 (Cth), and the challenges it faces in effectively performing this role. Additionally, it discusses the key challenges faced by the government in controlling the spread of diseases in the country, and the provisions of the Australian constitution that support the government's efforts.