section 430: the principles
15 The principles are comprehensively stated in the reasons of the majority in Singh at pars 44‑60. In summary, s 430(1)(b) requires the Tribunal to state the actual reasons for its decision so that, for example, a statement of reasons which the Court might consider unsatisfactory is not, of itself, a failure to comply with s 430; there is no specific requirement that the Tribunal give reasons for rejecting, or attaching no weight to, evidence or other material which would tend to undermine any finding it has made, subject to the qualification that, if one of the reasons which actually induced the Tribunal to come to its decision was that it decided to reject or place no weight on particular material, then s 430(1)(b) would require disclosure of that element of the actual reasoning process; the requirement, under s 430(1)(c), to set out findings on material questions of fact imposes a duty to make, and to set out, findings on all matters of fact that are objectively material to the decision which the Tribunal is required to make; for that purpose the material facts are not limited to those which the statute requires to be decided but extend to all of the material questions of fact raised by the material and evidence before the Tribunal (Addo v Minister for Immigration and Multicultural Affairs [1999] FCA 940 at par 19).
16 The majority judgment in Singh explains that latter requirement at pars 55 to 57, as follows:
"55. The reasoning process a Tribunal adopts may require a decision on a question of fact in order to complete the logical chain the Tribunal has adopted as the basis for its decision. Failure by a Tribunal to set out its findings in relation to that fact would involve a contravention of s 430(1)(c), as the process of reasoning adopted by the Tribunal has made that fact a material fact, since the decision is dependent upon it. Conversely an applicant may propose facts as material, but if the ultimate conclusion reached by the Tribunal is not dependent upon and does not require a finding on those facts, then they will not be material questions of fact, because the decision does not turn upon them. As Burchett J said in Dodds v Comcare Australia (1993) 31 ALD 690 at 691, in the context of s 43 of the AAT Act:
'Section 43 is not to be construed in a pedantic spirit, but sensibly. If the Tribunal's reasons expose the logic of its decision, and contain findings on matters of fact which are essential to that logic, it will not be easy to demonstrate a failure of compliance with a requirement to include 'findings on material questions of fact'.'
56. Accordingly if a decision, one way or the other, turns upon whether a particular fact does or does not exist, having regard to the process of reasoning the Tribunal has employed as the basis for its decision, then the fact is a material one. But a requirement to set out findings on material questions of fact, and refer to the material on which the findings are based, is not to be translated into a requirement that all pieces of conflicting evidence relating to a material fact be dealt with: see Durairajasingham [Re Minister for Immigration and Multicultural Affairs; ex parte Durairajasingham (2000) 74 ALJR 405] at pars [65] and [67].
57. Thus whilst materiality will not necessarily depend upon how an applicant chooses to present the issues, we do not agree that the only material facts are those on which the Tribunal is legally required to make findings: contrast Xu at pars [49] and [51]. A fact is material if the decision in the practical circumstances of the particular case turns upon whether that fact exists."
17 The passage from the judgment in Durairajasingham, to which their Honours refer, played a significant part in the argument before us. There, McHugh J pointed out that, in some circumstances, the obligation to set out the reasons for a decision of the Tribunal will require the Tribunal to state whether it has rejected or failed to accept particular evidence. We quote the passage in par 22 below.