NASB v Minister for Immigration and Multicultural and Indigenous Affairs

The case of NASB v Minister for Immigration and Multicultural and Indigenous Affairs involved an appellant seeking orders in the nature of mandamus and certiorari against the Minister for Immigration and Multicultural and Indigenous Affairs. The appellant, who had applied for a protection visa, challenged the Refugee Review Tribunal's (RRT) decision which dismissed his application. The primary judge dismissed the appellant's application, and the appellant appealed to the Court of Appeal.

The central legal issue was whether the discovery of fresh evidence, which could not have been found with due diligence before the trial, was a ground for granting certiorari. The appellant argued that the fresh evidence could have influenced the outcome of the RRT's decision. The court had to determine if the RRT's decision was vitiated by a mistake, as suggested by the appellant, or if it fell within the established limits of certiorari, which do not extend beyond defects or irregularities at the trial.

The Court of Appeal, while acknowledging the appellant's claims of fresh evidence, held that the scope of certiorari does not encompass the discovery of new evidence that could have influenced the outcome of the decision. The majority opinion, supported by Orr and Lawton LJJ, emphasised that certiorari is not concerned with the miscarriage of justice arising from the evidence but rather with the jurisdiction and regularity of the proceedings. The court concluded that the RRT's decision, being a privative clause decision, was not subject to the appellant's ability to present fresh evidence unless the Minister exercised specific powers under the Migration Act.

In conclusion, the Court of Appeal dismissed the appeal and the motion, affirming the primary judge's decision. The appellant was ordered to pay the respondent's costs of the appeal and the costs of the motion.