When the Attorney-General certifies under s 36A of the AAT Act that answering questions would be contrary to the public interest for reasons of national security, defence or international relations (s 36(1)(a) or (b)), the Federal Court on appeal under s 44 must decide the public interest question on the merits by reaching its own opinion, not merely review the Attorney-General's opinion for legal error. The Court's task is analogous to assessing a claim for public interest immunity at common law, weighing the effective performance of Tribunal functions against the stated reason for non-disclosure.
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