AKQ16 v Minister for Immigration

The applicant, AKQ16, sought judicial review of a decision made by the Immigration Assessment Authority (IAA) concerning their application for a protection visa. The Minister for Immigration was the respondent. The core of the dispute revolved around the validity of a certificate issued under section 473GB of the *Migration Act 1958* (Cth) and its impact on the IAA's review process.

The primary legal issue before the court was whether the IAA's decision was legally unreasonable, thereby constituting a jurisdictional error. This question necessitated an examination of the consequences of an invalid section 473GB certificate on the IAA's power to conduct its review and make a binding decision.

Judge Smith reasoned that a certificate issued under section 473GB is a prerequisite for the IAA to exercise its review jurisdiction. If such a certificate is found to be invalid, the IAA lacks the legal authority to proceed with the review. Consequently, any decision made by the IAA in the absence of a valid certificate is a nullity, amounting to a jurisdictional error. The court applied the principle that a tribunal or authority must act within the scope of its statutory powers, and exceeding those powers renders its decision invalid.

The court found that the section 473GB certificate in this instance was invalid. Accordingly, the IAA had no jurisdiction to review the applicant's protection visa application. The court ordered that the IAA's decision be quashed.