This article discusses the difference between the code of conduct of judges engaged in judicial review and administrative decision-makers. It also explains the basic principles of judicial review and administrative decision making, and the need for judicial review. The article examines the case of Minister for Immigration and Border Protection v Stretton (2016) 237 FCR 1, where the court performed judicial review of the discretionary powers of the Minister on the basis of legal unreasonableness. The article also discusses the principles of proportionality and jurisdictional error in judicial review.