34 In the exercise of those powers, natural justice must be afforded to those whose "rights, interests and legitimate expectations" are affected by the decision. See Kioa v West [1985] HCA 81; (1985) 159 CLR 550 at 584. In a case where the exercise of the powers conferred by ss40(1) and (2), 41 and 42, are all exercised by the same body or person(s), the exercise of the hearing power in accordance with the rules of procedural fairness will satisfy the requirements of natural justice upon the exercise of the determinative power. However, whether the rules of natural justice are satisfied in a case where the exercise of those powers are split between one or more persons will depend upon what information about the hearing is conveyed to the decision-maker in each case. The nature and complexity of the hearing and the accuracy and completeness of the information contained in the report will no doubt be significant factors in ascertaining whether the decision-making powers have been exercised in accordance with the rules of natural justice. Whether the separation of the hearing power from the determinative power will result in procedural unfairness will depend upon the circumstances of each case. It is easy to envisage a hearing, even a contested hearing, where there is a single simple issue, the evidence with respect to which is quite clear. In such a case a comprehensive report to the Commission would no doubt satisfy the natural justice rule. On the other hand, in a case where there are many witnesses involving substantial issues of credit, cross-examination and the use of documents, it may be very difficult to comply with the procedural fairness rule by way of report from the person who exercised the power, pursuant to the Land Use Act, s40(2) to the person(s) exercising the power conferred by ss41 or 42. Mr Casey's affidavit, par13, which I have set out, refers in a general way, to the contents of past reports from the person(s) conducting the hearing to the decision maker, but whether the report of the respondents will satisfy the requirements of natural justice in this case cannot now be determined. It cannot be determined until after the hearing has been conducted and the report has been prepared and delivered.