(a) The ground of failure to take into account a relevant consideration can only be made out if a decision-maker fails to take into account a consideration which he is bound to take into account in making that decision (Sean Investments Pty Ltd v. MacKellar (1981) 38 ALR 363, at p 375; CREEDNZ Inc. v. Governor-General (1981) 1 NZLR 172, at pp 183, 196-197; Ashby v. Minister of Immigration (1981) 1 NZLR 222, at pp 225, 230, 232-233). The statement of Lord Greene M.R. in Associated Provincial Picture Houses Ltd v. Wednesbury Corporation [1947] EWCA Civ 1; (1948) 1 KB 223, at p 228, that a decision-maker must take into account those matters which he 'ought to have regard to' should not be understood in any different sense in view of his Lordship's statement on the following page that a person entrusted with a discretion 'must call his own attention to the matters which he is bound to consider'."
21 At 45 his Honour continued:
"It would be a strange result indeed to hold that the Minister is entitled to ignore material of which he has actual or constructive knowledge and which may have a direct bearing on the justice of making the land grant, and to proceed instead on the basis of material that may be incomplete, inaccurate or misleading. In one sense this conclusion may be seen as an application of the general principle that an administrative decision-maker is required to make his decision on the basis of material available to him at the time the decision is made. But that principle is itself a reflection of the fact that there may be found in the subject matter, scope and purpose of nearly every statute conferring power to make an administrative decision an implication that the decision is to be made on the basis of the most current material available to the decision-maker."
22 The plaintiff submitted that in determining whether the Appeal Panel was bound, in the particular circumstances of this case, to take the racial or ethnic idiosyncrasies or characteristics of the plaintiff into account, it is necessary to have regard to its functions under the Act. The Appeal Panel exercises a function that is judicial in nature. Its determination has potentially significant consequences for the parties. The Appeal Panel has the power to confirm the certificate of assessment given in connection with the medical assessment from which the appeal is brought or to revoke it and issue a new certificate. Any new certificate is presumed to be conclusively correct: s 326.
23 In Riverina Wines Pty Ltd v Registrar of the Workers Compensation Commission of NSW [2007] NSWCA 149 at [86], Campbell JA said this:
"[86] To presume an MAC conclusively to be correct concerning the extent of impairment of a worker, advances the objectives that the system be affordable, financially viable and efficient. But if an AMS reaches a conclusion that, notwithstanding that presumption, is in fact incorrect, and if the MAC has the effect that the worker would be undercompensated if that MAC were to remain the conclusive determinant of the extent of impairment of a worker, the objectives of providing injured workers with payment for permanent impairment, and being fair, would be undermined. The procedural means by which the Act seeks to accommodate the different objectives of affordability, financial viability, efficiency, payment of benefits for permanent impairment, and fairness, in the context of the conclusiveness of an MAC, is by establishing the regime for appeals in limited circumstances and on limited grounds that section 327 sets up. The submission of Riverina Wines that I am here considering is one that concentrates on some of the objectives of the Act, but leaves others out of account. When section 327 provides a means of reconciling differing objectives of the Act, I do not find that a consideration of only some of those objectives is a useful aid to its construction."
24 The plaintiff submitted therefore that the Appeal Panel was bound to take particular matters into consideration. She argued that the Appeal Panel gave no consideration to the scientific matters raised by Dr Gardiner, concerning the need to make an allowance on testing for the differences that might apply to lung function and capacity in people of South Indian ethnic or racial background. Because the Appeal Panel proceeded to devise an approach to the assessment of the plaintiff's whole person impairment, by utilising clause 1.59 of the WorkCover Guides, the Appeal Panel was bound to take it into account and by implication also to set it out or describe it in the decision. A refusal to do so was, according to the plaintiff's submission, evidence of a constructive failure to exercise jurisdiction.
25 In Applicant WAEE v Minister for Immigration and Multicultural and Indigenous Affairs [2003] FCAFC 184; (2003) 75 ALD 630 at [46] and [47] the Full Court said this:
"[46] It is plainly not necessary for the Tribunal to refer to every piece of evidence and every contention made by an applicant in its written reasons. It may be that some evidence is irrelevant to the criteria and some contentions misconceived. Moreover, there is a distinction between the Tribunal failing to advert to evidence which, if accepted, might have led it to make a different finding of fact (cf Minister for Immigration and Multicultural Affairs v Yusuf [2001] HCA 30; (2001) 206 CLR 323 at [87]- [97]) and a failure by the Tribunal to address a contention which, if accepted, might establish that the applicant had a well-founded fear of persecution for a Convention reason. The Tribunal is not a court. It is an administrative body operating in an environment which requires the expeditious determination of a high volume of applications. Each of the applications it decides is, of course, of great importance. Some of its decisions may literally be life and death decisions for the applicant. Nevertheless, it is an administrative body and not a court and its reasons are not to be scrutinised `with an eye keenly attuned to error'. Nor is it necessarily required to provide reasons of the kind that might be expected of a court of law.