Decision on the appeal
48 As a result of the hearing before the Tribunal the tenants had valuable rights, namely the orders for compensation in their favour and the dismissal of Mr Griffiths' claim for compensation against them. An order under s 63 of the Residential Tribunal Act would deprive them of those rights: the hearing concluding on 1 December 1999 would be for naught, and there would be a hearing de novo in which they would be exposed to failure of their claims for compensation and to success of Mr Griffiths' claim for compensation. The Chairperson's decision was clearly one which would affect the tenants' rights; moreover, a decision to direct a rehearing would take away rights which had been achieved in a process in which the entitlement of both the tenants and Mr Griffiths to be heard was established.
49 Whether or not the Chairperson was acting administratively, in exercising her power under s 63 she was exercising a power to affect the rights of the tenants and, subject to a contrary statutory intention, was bound to hear the tenants before exercising the power: Twist v Randwick Municipal Council (1976) 136 CLR 106 at 109; FAI Insurance Ltd v Winneke (1982) 151 CLR 342 at 360, 376-7; Kioa v West at 563, 582, 628.
50 Is there a contrary statutory intention? Such an intention must be clear: the principles stated by Mason CJ and Deane and McHugh JJ in Annetts v McCann (1990) 170 CLR 596 at 598 apply -
"It can now be taken as settled that, when a statute confers power upon a public official to destroy, defeat or prejudice a person's rights, interests or legitimate expectations, the rules of natural justice regulate the exercise of that power unless they are excluded by plain words of necessary intendment: Commissioner of Police v Tanos [(1958) 98 CLR 383, at pp 395-396]; Twist v Randwick Municipal Council [(1976) 136 CLR 106, at pp 109-110]; Heatley v Tasmanian Racing and Gaming Commission [(1977) 137 CLR 487, at pp 496, 500]; J v Lieschke [(1987) 162 CLR 447, at p 456]; Haoucher v Minister for Immigration and Ethnic Affairs [(1990) 169 CLR 648, at p 680]. In Tanos [(1958) 98 CLR, at p 396], Dixon CJ and Webb J said that an intention on the part of the legislature to exclude the rules of natural justice was not to be assumed nor spelled out from 'indirect references, uncertain inferences or equivocal considerations'. Nor is such an intention to be inferred from the presence in the statute of rights which are commensurate with some of the rules of natural justice: Baba v Parole Board of New South Wales [(1986) 5 NSWLR 338, at pp 344-345, 347, 349]. In Kioa v West [(1985) 159 CLR 550, at p 584], Mason J said that the law in relation to administrative decisions 'has now developed to a point where it may be accepted that there is a common law duty to act fairly, in the sense of according procedural fairness, in the making of administrative decisions which affect rights, interests and legitimate expectations, subject only to the clear manifestation of a contrary statutory intention'. In Haoucher [(1990) 169 CLR, at p 653], Deane J said that the law seemed to him 'to be moving towards a conceptually more satisfying position where common law requirements of procedural fairness will, in the absence of a clear contrary legislative intent, be recognised as applying generally to governmental executive decision-making'.
51 The Master found the contrary statutory intention principally in s 63(2) of the Residential Tribunal Act. With respect, I do not think that the words "on the face of the application" limit the inquiry to be made by the Chairperson to the application alone. Section 63(2) states a threshold requirement, that it appear from what has been put forward by the applicant in the application that the applicant may have suffered a substantial injustice, so that an application which on its face is hopeless need not be further investigated and can be refused without troubling the other parties to the matter already heard. But if the threshold is passed the Chairperson may, and in many cases will have to, go beyond what is apparent on the face of the application. How can the Chairperson finally determine that there may have been substantial injustice because the decision of the Tribunal was against the weight of evidence without considering the evidence, the necessary extent and significance of which is most unlikely to be sufficiently apparent on the face of the application for a properly informed decision? How can the Chairperson finally decide in a properly informed manner whether the evidence now available is such that the applicant may have suffered a substantial injustice, without consideration of that evidence and the evidence given in the hearing of the matter when again, the necessary extent and significance of the evidence is most unlikely to be sufficiently apparent on the face of the application? And whether the applicant may have suffered a substantial injustice in one or more of the three situations described in s 63(1) involves questions on which the Chairperson is likely to receive assistance from hearing both sides to the questions - the questions are broad and the answers will not necessarily be clear.
52 That s 63(2) states a threshold requirement is further indicated by its initial words. They do not say that in determining whether the applicant may have suffered a substantial injustice in one or more of the three situations the Chairperson shall have regard only to what appears on the face of the application. Nor do they say that the Chairperson shall grant the application if it appears on the face of the application that the applicant may have suffered a substantial injustice. They deny to the Chairperson the grant of the application unless a particular conclusion is evident on the face of the application, and do no more.
53 The Master found support for her conclusion in the reference to the requirements of natural justice in s 63(3) of the Residential Tribunal Act, a reference absent from s 63(2). This invocation of something akin to the expressio unius exclusio alterius principle, usually a principle of suspect utility, was in my opinion unwarranted. The sub-sections deal with quite different subjects. A reference to the requirements of natural justice in the context of the constitution of the Tribunal for a rehearing, when the appropriateness of a rehearing by the Member of the Tribunal who had previously heard the matter would readily arise for consideration, is explicable. It carries no implications for absence of such a reference in the different context of whether a direction should be given that a matter be reheard.
54 In my opinion there is not a clear statutory intention inconsistent with the regulation of the power in s 63 of the Residential Tribunal Act by the requirements of procedural fairness, specifically that the other parties to the hearing be given the opportunity to be heard before the power is exercised. The Chairperson denied procedural fairness to the tenants, and her order made on 21 December 1999 should be quashed.
55 This appeal was heard on 24 May 2001. After these reasons had been prepared we were referred to a decision of Master Malpass in Constable v Anvic Holdings Pty Ltd (2001) NSWSC 444, a case heard on 23 May 2001 and decided on 30 May 2001. Amongst other matters, it was concerned with an application for a rehearing pursuant to s 63 of the Fair Trading Tribunal Act 1998, a provision identical to s 63 of the Residential Tribunal Act. The Master held that s 63(2) "was not intended to oust the requirements of procedural fairness" (at [34]), and "should be seen in the nature of a prohibition or threshold requirement" (at [35]). It is not necessary further to describe the reasoning. The decision of Master Harrison in the present case was referred to, but then politely passed over.