Minister for Immigration, Citizenship and Multicultural Affairs v Lieu, by her Litigation Representative Nguyen

The case involves an appeal by the Minister for Immigration, Citizenship and Multicultural Affairs against a decision of the primary judge, who reviewed the delegate's refusal to give notice of Australian citizenship to Charlotte Lieu, under s 37 of the Australian Citizenship Act 2007. The application for judicial review was made pursuant to s 5(1)(f) of the Administrative Decisions (Judicial Review) Act 1977 (Cth) and s 39B of the Judiciary Act 1903 (Cth). The primary judge found the delegate's decision was legally unreasonable in process and outcome, a conclusion with which the appeal court agreed, dismissing the appeal.

The legal issues before the court were whether the primary judge erred in finding that the delegate misunderstood or failed to appreciate the significance of certain documents as evidence of parentage and whether the primary judge erred in finding the delegate's decision was legally unreasonable in outcome. The court had to consider whether the delegate correctly understood and applied the law regarding the test of parentage as set out in H v Minister for Immigration and Citizenship. The appeal court determined that the delegate's reasoning departed from the statutory task to such an extent that it constituted legal unreasonableness.

In reaching its decision, the court highlighted that the delegate did not understand and apply the law in H correctly, which established that parentage is not just a matter of biology but also intense commitment to another. The delegate's focus on the relationship between the applicant and Mr Lieu, and on the "self-declared" nature of the statements in the documents, was misplaced. The self-declared nature of these documents was precisely what gave them significance once it was understood that a parental relationship need not be biological. The delegate's reasoning, which incorrectly dismissed the evidence based on these factors, led to the conclusion that the decision was legally unreasonable.

The final orders of the court were that the appeal be dismissed, and the appellant pay the respondent's costs of the appeal, to be fixed by an agreed lump sum or, in default of agreement, by a Registrar. This outcome ensures that the delegate's errors in understanding and applying the law are rectified, and the proper process for determining parentage in the context of citizenship applications is adhered to.