REASONING ON REFERRED QUESTION
28 There is a well established distinction between the administrative functions of the Commissioner, on the one hand, and assessment functions on the other - see Meredith v Federal Commissioner of Taxation (2002) 125 FCR 308 at pars [36]-[37]. The Commissioner contends that approval of another method under s 8(5)(b) of the Surcharge Act is an administrative function and not part of the assessment function of the Commissioner. The exercise of a function that may either afford or deny a taxpayer the opportunity of altering the factual basis upon which that taxpayer's assessment to tax is to be made is not, for that reason, part of an assessment (Hadfield Finance Pty Ltd v Federal Commissioner of Taxation (1988) 79 ALR 249 at 256 - 257).
29 Ultimately, the question turns upon the proper construction of s 43 of the AAT Act. Section 43 empowers the Tribunal to exercise all the powers and discretions conferred upon the original decision maker, provided it does so for the purpose of reviewing a decision. Provided the necessary purpose is present, the power conferred upon the Tribunal is not otherwise limited. It is neither necessary nor permissible to put a gloss upon s 43 that would permit the Tribunal to exercise the decision maker's powers and discretions only when those powers or discretions are necessarily interdependent with the decision under review, or where the power or discretion to be exercised by the Tribunal is necessarily involved in the making of the decision under review - see Secretary, Department of Social Security v Hodgson (1992) 37 FCR 32 at 39 - 40.
30 Thus, so long as the exercise of powers and discretions by the Tribunal is for the purpose of reviewing a decision, all of the powers and discretions conferred by any relevant enactment on the decision maker who made the decision, can be exercised by the Tribunal. Clearly, the Surcharge Act is a relevant enactment. Section 8(5)(b) of the Surcharge Act confers a discretion on the Commissioner to give or withhold approval of another method. The decision that is to be reviewed by the Tribunal is the Commissioner's objection decision of 26 August 2004 in respect of the assessment of the surcharge liability relating to Mr Cocks. The unequivocal words of s 43(1) are that, for the purpose of reviewing that decision, the Tribunal may exercise all the powers and discretions that are conferred by the Surcharge Act, as a relevant enactment, on the Commissioner.
31 In theory, it would be open to the Commissioner to make a different decision as to approval of another method in relation to each member of the Fund for each relevant financial year. Realistically, of course, one would expect the Commissioner to make consistent decisions. In particular, one would expect that the Commissioner would approve the same method for all members of a particular defined benefits superannuation scheme and, ordinarily, one would expect that the same method would be used for successive years. That might suggest that the function of approving another method is an administrative function rather than an aspect of the assessment function in respect of a particular member for a particular financial year.
32 However, the power to give approval under s 8(5)(b) is a power to be exercised in relation to the member for the financial year. The power must be exercised in relation to each individual member and the approval affects or alters that member's substantive liability to tax. The grant of approval in relation to a member for a financial year has no operation that is independent of the assessment of that member under s 15.
33 The Trustee contends that an assessment under s 15 is not, in any material respect, different from an assessment under s 166 of the Income Tax Assessment Act 1936 (Cth) ('the 1936 Act'). An assessment under the 1936 Act means the completion of the process by which the provisions of the 1936 Act relating to liability to tax are given concrete application in a particular case, with the consequence that a specified amount of money will become due and payable as the proper tax in that case - see Batagol v FCT (1963) 109 CLR 243 at 252. Where the Commissioner is required to form an opinion or make a determination in the course of an assessment, the formation of that opinion and the making of such a determination are within the powers of the Tribunal in reviewing an objection decision in respect of such an assessment. The Trustee contends that the exercise of a discretion to adopt one method of calculation of an integer in the assessment process, rather than another, is as integral to the assessment as the formation of an opinion or the making of a determination.
34 If the objection and subsequent review process described above proceeded to finality, the Tribunal, if it were not empowered to reconsider the method by which relevant amounts are to be worked out, would be bound by the Commissioner's decision of 29 June 2001. If the Tribunal dismissed the Trustee's application for review and the Court subsequently quashed the decision of 29 June 2001 under the ADJR Act, the Commissioner would then need to reconsider the exercise of discretion under s 8(5)(b) of the Surcharge Act. If the Commissioner then approved another method, there would be real questions as to the standing of the intermediate steps, consisting of the Commissioner's objection decision refusing the Trustee's objection and the Tribunal's decision dismissing the application for review.
35 The process of objection and review could not be undertaken again unless the earlier process were set aside in some way. On the other hand, there would be no entitlement of the Trustee or Mr Cocks to have the earlier process set at nought. On that view, the Trustee's victory under the ADJR Act would be Pyrrhic indeed, since it would be too late for the Trustee and Mr Cocks to enjoy any fruits from that victory. The Tribunal's decision would stand, based though it was on a wrong decision of the Commissioner that had in the meantime been quashed. On that view, the Court's quashing of the decision of 29 June 2001 would be an exercise in futility because that decision is no longer operative.
36 Section 19(1)(a)(ii) of the Surcharge Act relevantly provides that s 19 applies if, after the making of an assessment of surcharge on a member's surchargeable contributions for a financial year, the amount of the contributions is greater or less than the amount that was taken to be the amount of the contributions for the purposes of the assessment. Section 19(3) provides that the Commissioner may amend the assessment to take account of such a matter. Under s 19(5) if, as a result of the amendment of the assessment, the amount of surcharge is reduced, the Commissioner must refund the amount of any surcharge overpaid. However, s 19 is subject to s 17A.
37 Section 17A(1) of the Surcharge Act relevantly provides that, subject to the section, the Commissioner may, at any time, amend an assessment of surcharge on a member's surchargeable contributions by making such alterations or additions as the Commissioner thinks necessary. Such an amendment may be made on the Commissioner's own initiative or at the request of the member or the relevant superannuation provider. However, under s 17A(4), an amendment effecting a reduction in the amount of surcharge payable under an assessment is not to be made after the end of four years from the date upon which the surcharge became due and payable under the assessment.
38 The Commissioner contends that if, consequent upon a successful application under the ADJR Act for review of the decision under s 8(5)(b) after the making of an assessment, the Commissioner exercised his discretion to approve another method, the Commissioner would be under a duty under s 19(3), after receiving from the Trustee revised surchargeable contributions information, to recalculate the liability and to amend the assessment, if time limits permitted.
39 The Commissioner also contends that, if the decision under s 8(5)(b) were quashed under the ADJR Act subsequent to the making of an objection decision and after an application had been made to the Tribunal, while s 26 of the AAT Act would prevent the Commissioner from amending the assessment unilaterally, the Trustee would be entitled to rely on the other method before the Tribunal, since the correct or preferable assessment decision in relation to the objection against the assessment would then be calculated by reference to the altered liability resulting from the other method.
40 However, the Commissioner does not suggest that, if the successful application under the ADJR Act were determined after dismissal by the Tribunal of the review of the objection decision, the Trustee or Mr Cox would have any remedy. That is to say, in those circumstances, the Commissioner appears to have accepted that the Trustee's victory under the ADJR Act would be a Pyrrhic one.
41 That consequence indicates the answer that must be given to the question posed by the Tribunal. That is to say, the consideration of the method to be adopted for working out the relevant amounts is an essential part of the process of making an assessment under s 15 of the Surcharge Act. Section 8(5) of the Surcharge Act, in its form, requires the Commissioner to work out an amount using either the method set out in the Regulations or another method. In substance, it has the effect that the amount may be worked out using a method determined by the Commissioner as being appropriate in relation to the member for the financial year in question.
42 The only significance of the form of s 8(5) is that the method set out in the Regulations is to be used unless the Commissioner approves another method in writing as being appropriate. Nevertheless, the process of making an assessment under the Surcharge Act in respect of an individual member in respect of a particular year involves the consideration of the appropriate method for working out relevant amounts. Approving a method as being appropriate in relation to a particular member for a particular financial year has no consequence except in relation to that member for that year. That, coupled with the consequence of there otherwise being no effective review of the exercise of discretion, indicates that the discretion under s 8(5)(b) of the Surcharge Act is a discretion that may be exercised by the Tribunal in dealing with an application under s 14ZZ of the Administration Act.