77 In Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs v FAK19[99], one of the two appeals heard by the Full Court of the Federal Court involved the circumstance, like that in the plaintiff's case now before this Court, of mandatory cancellation of the visa of the appellant, FAK19, under s 501(3A). Upon review by the Administrative Appeals Tribunal, constituted by two members who disagreed, with the decision of the presiding member therefore prevailing**[100], the Tribunal affirmed a decision not to revoke the cancellation. In the Federal Court, the primary judge, and the unanimous Full Court (Kerr and Mortimer JJ, with whom Allsop CJ agreed), held that the Tribunal had made a jurisdictional error by excluding from its consideration the effect of the cancellation of the plaintiff's visa on Australia's international non‑refoulement obligations[101]. This issue had been the subject of "a lengthy discussion between the Tribunal and counsel for both FAK19 and the Minister"[102]. Although the nature of this jurisdictional error was characterised in various ways by Kerr and Mortimer JJ, it is relevant that their Honours endorsed a statement that there is "a statutory obligation on the Minister to engage, in an active intellectual sense with the representations"[103]**.