Minister for Immigration and Border Protection v Singh & Anor

The applicant, the Minister for Immigration and Border Protection, sought special leave to appeal to the High Court of Australia from a decision of the Full Court of the Federal Court of Australia. The dispute concerned the extent of procedural fairness obligations owed by the Administrative Appeals Tribunal (AAT) when dealing with a certificate issued under section 375A of the *Migration Act 1958* (Cth). The Minister contended that the Full Court had erred in its interpretation of section 357A of the Act and the principles of procedural fairness.

The High Court was required to determine the scope of section 357A(1) and (2) of the *Migration Act*, specifically whether these provisions exhaustively defined the hearing rules in relation to certain matters, thereby limiting any implied procedural fairness obligations. A further issue was whether the Full Court had placed undue emphasis on the need for the Tribunal to assess the effectiveness of a section 375A certificate and provide applicants with an opportunity to challenge its validity, and whether this created an overly broad procedural fairness obligation. The Court also considered the interaction between section 357A and other provisions, such as section 362A, which grants applicants a right to access written material before the Tribunal.

The Minister argued that section 357A(1) made specific provisions within Division 5 of the Act exhaustive regarding the subject matters they addressed, including the provision of information and documents to applicants. This, it was submitted, excluded any further implied obligations of procedural fairness. Regarding section 357A(2), the Minister contended that it operated to narrow existing procedural fairness obligations, meaning an applicant would not have a right to a hearing about a certificate or the Tribunal's handling of it unless specifically provided for in the referenced sections, such as section 375A. The Minister further argued that procedural fairness obligations only qualify grants of decision-making power and do not extend to a decision-maker's internal contemplation of procedures, particularly when those procedures are dictated by the Act itself, as was the case with the section 375A certificate.

The respondent, Mr. Singh, argued that the Full Court's decision correctly applied principles of procedural fairness to the facts, and that no question of public importance arose. The respondent contended that section 375A itself did not deal with the disclosure of a certificate's existence, but rather with the protection of confidential material. Furthermore, the specific sections in Division 5, such as section 359A, dealt only with limited disclosures of adverse information, not all occasions on which the Tribunal might disclose information. The respondent submitted that the Full Court's emphasis on the Tribunal's obligation to allow applicants to query the validity of a certificate was a correct application of procedural fairness principles.