Conclusion
27 At first consideration, it appears difficult to accept the Commissioner's submission that Mr Lui's submissions failed to identify a clear construction of s 14U(1)(b) of the Taxation Administration Act. After all, the AAT's reasons identified two competing constructions of the precondition in s 14U(1)(b)(ii) (i.e. "…if the person is unable to give such security, the Commissioner is satisfied that…") both of which the AAT said were open on the language of the provision, namely: - (i) a person has been unable to persuade the Commissioner to accept security of a certain kind or of a particular value (at [20]), or (ii) a person lacks capacity to give security satisfying the Commissioner (at [21]). But closer consideration discloses that it is difficult to articulate the precise meaning of the precondition on the construction which Mr Lui advances. For example, it could be said that the former construction (preferred by Mr Lui) asks whether the Commissioner has been given security to the Commissioner's satisfaction. If not, the person has been unable to give such security. This, indeed, was the extent of Mr Lui's submission to the AAT. The latter construction (preferred by the Commissioner) asks whether the person can give security to the Commissioner's satisfaction. If not, the person has been unable to give such security. As explained below, the former construction tends to yield numerous ambiguities which the AAT recognised in its reasons at [26] in its references to both a refusal to give security and a failed negotiation about security. We return to this point at [34] and following.
28 As the Commissioner acknowledged the words "such security" in s 14U(1)(b)(ii) are a reference back to the text of s 14U(1)(b)(i) and thus mean "security to the satisfaction of the Commissioner for the person's return to Australia". This fact led Buchannan J (correctly, in our view) to accept that the construction advanced by Mr Lui in this appeal is open on the language of the provision. But, for the reasons his Honour gave and as expanded upon below, that fact does not provide support sufficient to accept the construction which Mr Lui advanced.
29 Many of Mr Lui's arguments are answered by an analysis of the scheme as a whole. The imposition of a departure prohibition order under s 14S requires the Commissioner to believe on reasonable grounds that "it is desirable to do so for the purpose of ensuring that the person does not depart from Australia for a foreign country" (s 14S(1)(b)). A departure prohibition order remains in force until revoked under s 14T or set aside by a court (s 14(2)). Revocation under s 14T is required in certain circumstances (s 14T(1)) and possible in others (s 14T(2)). As to the latter, the discretion vested in the Commissioner is wide. The Commissioner may "in the Commissioner's discretion and on application being made to the Commissioner to do so or on the Commissioner's own motion, revoke or vary the departure prohibition order". In other words, the granting of a departure authorisation certificate is not the only means by which a person subject to a departure prohibition order may leave Australia. The Commissioner has discretion to vary or revoke the order. This discretion is confined only by the "the subject matter, scope and purpose" of the Taxation Administration Act (Minister for Aboriginal Affairs v Peko-Wallsend Limited (1986) 162 CLR 24 at 40).
30 Section 14U, which sets out the scheme for departure authorisation certificates, provides three circumstances in which a person may be permitted to leave Australia despite a departure prohibition order. In summary, they are as follows. First, the Commissioner may be satisfied that the person is likely to return, the tax debt is likely to be recovered in full or is completely irrecoverable, and that security for the person's return is unnecessary or undesirable (s 14U(1)(a)). Second, and if not satisfied in accordance with s 14U(1)(a), the person may have given security to the Commissioner's satisfaction (s 14U(1)(b)(i)). Third, "if the person is unable to give such security", the Commissioner is satisfied that a departure authorisation certificate should be issued to the person on humanitarian grounds or refusal to so issue a certificate would be detrimental to the interests of Australia.
31 The scheme is to be considered as a whole and its provisions construed in that context. Section 14U(1)(b)(ii) thus is to be construed "on the prima facie basis that its provisions are intended to give effect to harmonious goals" and in such a way as "to give meaning to every word of the provision …" (Project Blue Sky Inc v Australian Broadcasting Authority (1998) 194 CLR 355; [1998] HCA 28 at [70]-[71]).
32 The words "if the person is unable to give such security" qualify the availability of the discretion to issue a departure authorisation certificate on humanitarian or public interest grounds. Those words must be given work to do. The cases to which Mr Lui referred (Poletti, Puglisi, Winter, Leeder and IRG Technical Services) concern either cases turning on their own facts or general principles of construction. They do not answer the specific question in issue in the appeal.
33 Insofar as Mr Lui relied on the final example in Leeder to support his construction (that is, inability as involving "an act …which in existing circumstances this person could do if he directed his mind to nothing else, but which, having regard to other circumstances, he could not reasonably be expected to do"), there is yet another difficulty. This test depends on a factual assessment of reasonableness in the circumstances. The facts in this case disclose that the Commissioner was not satisfied that Mr Lui had demonstrated that his offer was reasonable in the circumstances. Be that as it may, consideration of the statutory scheme as a whole indicates that, if anything, the precondition involves the penultimate meaning of "unable" as "an act …which this person could not in existing circumstances do", consistent with the approach of Buchanan J.
34 One difficulty for Mr Lui is that his construction of s 14U(1)(b)(ii) would have the same effect if it simply commenced with the words "the Commissioner is satisfied that…". This indicates that the words must mean something more than the mere fact that the Commissioner has not been given security to the Commissioner's satisfaction.
35 This proposition leads to the next difficulty for Mr Lui. Once it is accepted that the words of the precondition "if the person is unable to give such security" cannot simply mean that the Commissioner has not been given security to the Commissioner's satisfaction, a spectrum of possibilities opens up. Whatever else it might mean, "unable" does not mean simply "unwilling", as Mr Lui's submissions acknowledged. Hence, the precondition, on Mr Lui's construction, also requires the person to have offered some security which the Commissioner has rejected as unsatisfactory. If that is so, another question arises. Must the offer be genuine and reasonable or is a mere derisory offer (which the Commissioner inevitably will reject) sufficient to satisfy the precondition? Further, unless the Commissioner knows the person's financial position how can a genuine and reasonable offer be distinguished from a derisory offer? The answers to these questions disclose that the Commissioner's submission, to the effect that Mr Lui's construction invites circumvention, has force. The practical consequence of Mr Lui's construction is to shift the capacity for satisfaction from the Commissioner to the taxpayer. Any "genuine" offer rejected by the Commissioner, irrespective of its relationship to the taxpayer's true assets, would suffice to satisfy the precondition on Mr Lui's approach. As the Commissioner submitted, given the statutory context, this seems unlikely.
36 These problems are avoided by giving the precondition its natural and ordinary meaning, as Buchanan J did. This approach satisfies the fundamental tenets of statutory construction. It gives the precondition work to do. It accords with the overall structure of s 14U in which each option is dependent on the failure to satisfy the preceding option. It also accords with the natural meaning of the language of the precondition by focusing on the person who is unable to give such security, being security to the satisfaction of the Commissioner.
37 We do not find Re Wetzell and Child Support Registrar [2005] AATA 607, to which Mr Lui drew the Court's attention, persuasive to the contrary. The only issue in that case was whether an offer of security funded by a loan involved the person in giving security as required. The facts are different in the present case and raise different questions for consideration.
38 The results of the construction adopted by Buchanan J are not surprising. The departure authorisation certificate scheme is only relevant to a person whom the Commissioner thinks should still be subject to such an order (recognising the Commissioner's power to revoke such an order on application to a court or the Commissioner's own motion). As noted, the option in question is only reached where the Commissioner, in effect, thinks the tax debt is not irrecoverable but is not likely to be discharged soon and that the tax debtor should return to Australia but is unlikely to do so. In those circumstances it is not surprising that the legislature required the tax debtor to be unable to provide security to satisfy the Commissioner before they could avail themselves of the ameliorating provisions relating to humanitarian grounds or the public interest. The persuasive force of Mr Lui's argument based on the public interest is lost once it is recognised that the Commissioner has a very broad discretion to vary or revoke a departure prohibition order. As Buchanan J held, in the context of the statutory scheme as a whole, what would be surprising is if "departure in the absence of satisfactory security would be contemplated in a case of refusal to provide security or an unsuccessful negotiation about what would constitute satisfactory security" (at [26]). Yet this is the practical result of Mr Lui's interpretation.
39 Nor does the extrinsic material suggest that a contrary construction is appropriate. The AAT's reasons set out the relevant extracts at [11]-[14]. It is true that two of the extracts (at [11] and [14]) omit any reference to the person being unable to give security and speak only of departure being authorised on humanitarian or general policy grounds. But one of the references does include a reference to the precondition that the person must be unable to give security (at [12]). At best, the extrinsic material is itself ambiguous. It by no means "strongly supports" Mr Lui's construction as claimed.
40 For these reasons we consider that the questions of law identified in the notice of appeal should each be answered "no". Accordingly, the appeal must be dismissed with costs.
I certify that the preceding forty (40) numbered paragraphs are a true copy of the Reasons for Judgment herein of the Honourable Justices Stone, Edmonds and Jagot.