Validity
14 The issues concerning validity are the same for both letters and attention may be confined to the cancellation letter dated 27 June 2017. It contained two portions which are relevant to the issues in dispute. These are:
(1) The Address: The letter was sent by registered post to the following address (although in these reasons, as required by s 91X of the Act, the First Respondent's name has been redacted so as not to identify him as a person who sought refuge in Australia in the event that he is repatriated to his country of origin):
[Name of First Respondent] MIN [######] MSPC Long Bay Correctional Complex P.O. Box 13 MATRAVILLE NSW 2036
(2) The Time of Receipt Section: The letter explained when it was taken to have been received in these terms:
As this letter was sent by mail from a place in Australia to an address in Australia, you are taken to have received this letter seven (7) working days after the date of the letter.
15 The First Respondent submits, and the trial judge found, that reg 2.55(3)(c) was inconsistent with s 494A(1). It was therefore invalid because the regulation making power in s 504(1) of the Act only authorised the making of regulations which were 'not inconsistent with this Act'.
16 Respectfully, I do not agree although for reasons which were not advanced to the learned trial judge. It is true that the preconditions to the operation of s 494A(1) were met. Both s 107(1) and reg 2.42(1) (which contains the obligation for the Minister to notify a former visa holder of a visa cancellation under s 109) meet the negative requirements of ss 494A(1)(b)(i) and (ii). Neither provision stipulates a method specified by s 494B (so as to bring them within s 494A(1)(b)(i)) and the First Respondent was not in immigration detention so s 494A(1)(b)(ii) had no relevance.
17 Where, as here, its preconditions are met s 494A(1) permits, but does not require, the Minister to give a document to a person by any method thought appropriate. This is because the word 'may' indicates the presence of a discretionary power. Section s 33(2A) of the Acts Interpretation Act 1901 (Cth) provides that where an Act provides 'that a person, court or body may do a particular act or thing, and the word may is used, the act or thing may be done at the discretion of the person, court or body.' Section 33(2A) is subject to the terms of the particular legislation in question exhibiting 'a contrary intention': s 2(2). These provisions reflect the common law position which was generally that, unless the context otherwise requires, the word 'may' means 'may' rather than 'must': Ward v Williams (1955) 92 CLR 496 at 505; Ex parte Gleeson [1907] VLR 368 at 373 per Cussen J; Acting Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs v CWY20 [2021] FCAFC 195; 288 FCR 565 at [94]-[95] per Besanko J ('CWY20'). In any event, the inquiry is the same: the word 'may' is facultative in s 494A(1) unless the terms of the Act indicate a contrary intention.
18 The First Respondent resists this conclusion and contends that the word 'may' means 'must'; that is to say, that the statutory context requires that once the preconditions to the operation of s 494A(1) are established, the word 'may' casts an immediate duty upon the Minister then to select a method of delivery which he or she considers 'appropriate'. The difference between these two positions may seem slight but, as will be seen, it has a distinct impact upon the question of whether reg 2.55(3)(c) can be inconsistent with s 494A(1) in a case where the Minister has not exercised the power in s 494A(1).
19 The First Respondent submits that 'may' is to be read as imposing a duty rather than a discretion for two reasons. First, he submits that if it is not read that way then the provision does nothing which the Act does not already do and, in that sense, is redundant. I would accept that if reading 'may' as conferring a discretion would operate so as to give s 494A(1) a redundant or otiose operation then this would be a compelling reason not to embrace such a construction: Project Blue Sky Inc v Australian Broadcasting Authority [1998] HCA 28; 194 CLR 355 at 382 [71] per McHugh, Gummow, Kirby and Hayne JJ, quoting Commonwealth v Baume (1905) 2 CLR 405 at 414 per Griffith CJ.
20 What then is the suggested redundancy? Where 'may' is construed to confer a discretion the First Respondent accepts, correctly with respect, that s 494A(1) then contains two discretions. The first discretion is whether to utilise s 494A(1) at all whilst the second is a discretion, arising only after the first discretion is affirmatively exercised, to choose any delivery method which the Minister considers appropriate.
21 Section 494A(1) is, of course, a provision which operates by reference to other provisions which, loosely speaking, require or permit the Minister to give a document to a person without at the same time specifying how this is to be done. In this case, the relevant provision was s 107 which permitted the Minister to give a notice to the First Respondent. The First Respondent submits that the meaning of the word 'give' in s 107 is such that the Minister could act within its metes and bounds only by selecting a method of delivery he or she considers appropriate. I have framed this submission by reference to s 107 but the breadth of the submission is such that it applies to any provision that requires or permits the Minister to give a document to a person and, I am prepared to assume, to those which use other similar words such as 'notify' (as in reg 2.42(1)) or 'inform' rather than 'give'.
22 The last and critical step in the submission was to observe that this conclusion had the consequence that the decisional freedom afforded by s 494A(1) and any provision using the word 'give' was the same. It followed that construing 'may' as conferring a discretion made s 494A(1) redundant. For example, in this case it meant that the Minister could decide to use the power in s 494A(1) and then select any method of delivery he or she thought appropriate. But, if the Minister decided not to use s 494A(1), precisely the same choice would then arise under s 107 by reason of the word 'give'. On this view, s 494A(1) added nothing to the Act.
23 I do not accept this submission for three reasons. The first relates to important elements in the scheme of which s 494A(1) is but a part. Section 494A(1) permits, but does not require, the Minister to choose one of the methods specified in s 494B to effect the delivery of the document. That is to say, it is possible for the Minister to decide to exercise the power in s 494A(1) and thereafter to choose a method of delivery which is not one of the methods set out in s 494B.
24 However, where the Minister decides in the exercise of the power under s 494A(1) to utilise one of the methods in s 494B to give a document to a person, s 494C then contains provisions which specify when the document is taken to have been given to the person. For example, where a document is sent by pre-paid post it is taken to have been received seven working days after the date it bears: s 494C(4).
25 No such result can be achieved through a provision such as s 107 which merely uses the word 'give'. If the Minister chooses a method of delivery to give a document to a person relying upon the word 'give' in s 107 that provision lacks any mechanism for determining when the 'giving' took place. Put another way, provisions such as s 107 lack certainty as to timing whereas the machinery of s 494A(1) allows the Minister to determine with certainty when a document is given to a person by utilising the methods set out in s 494B. Thus it is not correct to say that provisions such as s 107 have the same content as s 494A(1). Even if the word 'give' in provisions such as s 107 confers the same decisional freedom as s 494A(1), the latter is not therefore otiose because of the important timing stipulations it permits to be made through s 494B.
26 The second reason I do not accept the submission relates to the different legal principles governing the word 'give' in s 107 and those governing the formation of the state of satisfaction required by s 494A(1). In the case of the former, whether the Minister has 'given' a document to the person will turn on the meaning of the word 'give' and will be a question to be answered by seeking to construe that word. Whether any particular method of delivery constitutes, as a matter of law, the giving of the document to the person within the meaning of s 107 will not in any way be a function of whether the Minister considers the method an appropriate one.
27 On the other hand, s 494A(1) is explicit that any method may be selected by the Minister so long as it is one that he or she considers appropriate. The ambit of s 494A(1) is therefore delimited only by the Minister's consideration of what is appropriate. The formation of that opinion is, of course, not entirely without limit. It may be reviewed where it appears there has been a failure to address the correct question, a material mistake of law, the taking into account of extraneous or irrelevant matters or a failure to take into account relevant considerations or where the decision is illogical, irrational or plainly unreasonable: see the cases collected by Besanko J in CWY20 at [142]. Nevertheless, the critical point is that the ambit of the word 'give' in s 107 is not in any way affected by the Minister's views as to what is appropriate whereas s 494A(1) makes the Minister's state of the mind the central focus of the provision.
28 The third reason is that any redundancy in s 494A(1) is not avoided, even on the Appellant's argument, by the word 'may' being read as 'must'. This is because the purported redundancy arises from the contention that the method selection contemplated by s 494A(1) is the same as the method selection contemplated by a provision such as s 107. Were that observation correct, it would be correct regardless of whether 'may' means 'must' in s 494A(1).
29 For those reasons, I do not accept that s 494A(1) is redundant if construed so that 'may' confers a discretion. Its exercise potentially enlivens significant deeming provisions about timing and its substantive content differs from the word 'give' in s 107 (and other such provisions).
30 The First Respondent's second submission was that reading 'may' as conferring a discretion in s 494A(1) led to the limitation contained in that provision being potentially outflanked. The suggested limitation in s 494A(1) was that the method of delivery had to be one considered by the Minister to be appropriate. As I understood the argument, the point was that if the Minister could decide not to utilise s 494A(1) then a method of delivery might be selected which was not one which the Minister considered to be appropriate.
31 For the reasons I have already given, this submission is correct inasmuch as it correctly identifies that s 494A(1) operates by reference to the formation of an opinion of the Minister. However, I part company with the submission where the First Respondent characterises the formation of that opinion as a limitation which could be outflanked by other provisions if s 494A(1) need not be utilised and is merely facultative. Here the thinking can only be that a provision such as s 107 which uses the word 'give' would, but for s 494A(1), authorise a wider range of delivery methods than might possibly be considered by the Minister under s 494A(1) to be appropriate.
32 I do not think that is the effect of the provision. The meaning of the word 'give' in s 107 takes its meaning from the ordinary meaning of the word informed by the statutory context of s 107. By contrast, the meaning of the word 'give' in s 494A(1) takes its meaning from its statutory context which includes the fact that whatever else it means it includes the meanings in s 494B.
33 Thus, for example, s 494A(1) permits, through s 494B(1A), a document to be given to a minor by providing it to a person who is at least 18 years old who the Minister reasonably believes has the day-to-day care of the minor. It is doubtful that such an outcome can be achieved through the ordinary meaning of the word 'give' in s 107. Further, s 494B(5A) contemplates that a document may be given by making it available on an online account which it may be doubted constitutes the giving of a document in ordinary parlance (although it would probably constitute a communication).
34 These extensions to the ordinary meaning of 'give' and the fact that the available methods of selection under s 494A(1) include but are not exhaustively delimited by these extensions suggest that the word likely has a broader meaning in s 494A(1) than it bears in s 107. They certainly provide no succour for the First Respondent's submission that s 494A(1) is narrower in scope than s 107.
35 Consequently, I do not accept that either of the First Respondent's submissions provide any sufficient reason to read 'may' as not conferring a discretion. In that circumstance, s 494A(1) is merely facultative and the Minister has a discretion whether to exercise it or not. The discretion to exercise this power is, as I have already noted, distinct from the further discretion conferred by this section, which allows the Minister, having decided to exercise the power, to choose a method that he or she considers appropriate. Whether, in any particular case, it has been exercised is a question of fact. The terms of the letter of 27 June 2017 show that the delegate who issued it did not exercise the discretion to rely on s 494A(1) to choose an appropriate method. Rather, it shows that he understood himself to be exercising the power in reg 2.55(3)(c) for it was not possible to achieve the timing stipulations stated in the letter under s 494A(1). Although both parties on appeal accepted that the delegate had acted under reg 2.55(3)(c) rather than s 494A(1) it is worth explaining why this must be so.
36 There are only three possible scenarios concerning the sending of this letter. First, the delegate could have decided that he would exercise the power in s 494A(1) by selecting a method consisting of sending the letter by prepaid post to the post office box address of the prison. There is no doubt that the power in s 494A(1) would have permitted this. However, if this were done the deeming provision in reg 2.55(7) which deemed the letter to have been received seven working days after the date that it bore would not have been enlivened since the letter would have been sent under s 494A(1) and not reg 2.55(3)(c).
37 Consequently, if this is what occurred the letter incorrectly stated that it was deemed to have been received on the seventh working day after the date that it bore.
38 Secondly, the delegate could have decided under s 494A(1) to use one of the methods in s 494B to send the letter by prepaid post. The relevant method is set out in s 494B(4):
494B Methods by which Minister gives documents to a person
…
Dispatch by prepaid post or by other prepaid means
(4) Another method consists of the Minister dating the document, and then dispatching it:
(a) within 3 working days (in the place of dispatch) of the date of the document; and
(b) by prepaid post or by other prepaid means; and
(c) to:
(i) the last address for service provided to the Minister by the recipient for the purposes of receiving documents; or
(ii) the last residential or business address provided to the Minister by the recipient for the purposes of receiving documents; or
(iii) if the recipient is a minor - the last address for a carer of the minor that is known by the Minister.
39 Had this been done, this would have engaged an equivalent deeming provision in s 494C(4). It provides:
494C When a person is taken to have received a document from the Minister
…
Dispatch by prepaid post or by other prepaid means
(4) If the Minister gives a document to a person by the method in subsection 494B(4) (which involves dispatching the document by prepaid post or by other prepaid means), the person is taken to have received the document:
(a) if the document was dispatched from a place in Australia to an address in Australia - 7 working days (in the place of that address) after the date of the document; or
(b) in any other case - 21 days after the date of the document.
40 Thus, if s 494B(4) could have been engaged then s 494C(4) would have authorised the timing stipulations in the letter and, specifically, the statement that it was taken to have been received seven working days after the date that it bore. However, whilst in this scenario the deeming provision would operate, the problem is that s 494B(4) could not apply to the present situation. Unlike reg 2.55(3)(c), s 494B(4) contains no reference to a post office box address and unlike reg 2.55(3)(c) it does not operate on the last address known to the Minister but rather on the last address provided to the Minister. It was not suggested by the Minister that the First Respondent had provided the post office box address of the prison as his address.
41 Thirdly, the delegate could have decided not to exercise the power in s 494A(1). At this point, he was then required to send the letter in accordance with reg 2.55(3) since the terms of that regulation are not optional. He elected to send it by post thereby engaging reg 2.55(3)(c) and amongst the options provided by that subsection he exercised a discretion to choose to use the post office box address of the prison. On this view, the letter is correct in every particular since, being an exercise of power under reg 2.55(3)(c), the deeming provision in reg 2.55(7) was engaged.
42 The terms of the letter are, therefore, only consistent with the power in s 494A(1) not having been engaged. As the parties therefore agreed, the power in s 494A(1) was not, as a matter of fact, exercised.
43 The question which then arises is whether reg 2.55(3)(c), under which the delegate understood himself to be acting, is invalid. If it was invalid, then it will not have authorised the delegate's actions which will, subject to questions of materiality, most likely be invalid too.
44 The First Respondent submits that reg 2.55(3)(c) is invalid because it is inconsistent with s 494A(1). The validity of the regulation turns upon whether it is supported by the regulation making power contained in the Act which is s 504(1). That provision authorises the Governor-General to 'make regulations, not inconsistent with this Act' of various kinds including, relevantly, regulations 'making provision for and in relation to … the giving of documents to … any other person or body, for the purposes of this Act': s 504(e)(i). There is no doubt that reg 2.55(3)(c) answers that description so that the subject matter of the regulation is in principle authorised. The only question then is whether it nevertheless falls outside the regulation making power because it is inconsistent with the Act (i.e., in the language of s 504(1), not 'not inconsistent with this Act'). An important consideration in judging inconsistency is 'the degree to which the legislature has disclosed an intention of dealing with the subject with which the statute is concerned': Morton v Union Steamship Co of New Zealand Ltd (1951) 83 CLR 402 at 410; Plaintiff M47/2012 v Director-General of Security [2012] HCA 46; 251 CLR 1 ('Plaintiff M47/2012') at 41-42 [54] (French CJ), 64-65 [133]-[134] (Gummow J).
45 I would accept that reg 2.55(3)(c) is outside the power conferred by s 504(1)(e)(i) in cases where the Minister decides to exercise the power in s 494A(1). Once the power in s 494A(1) is exercised, there can be no room for the operation of any regulation and it is not necessary to inquire into whether the regulation is inconsistent with the actual method selected by the Minister under s 494A(1). The First Respondent submitted that there was another direct inconsistency between s 494A(1) and reg 2.55(3) even where the power in the former had not been enlivened. Here the argument was that the effect of the regulation was to bind the Minister not to exercise the power in s 494A(1). I am doubtful that, properly construed, reg 2.55(3) purports to bind the Minister not to exercise the power in s 494A(1). It does not address itself to the topic of the exercise by the Minister of other powers he has under the Act. Rather, it simply regulates the giving of documents. As a matter of text, I would not therefore read reg 2.55(3) as purporting to limit the Minister in the exercise of the power in s 494A(1).
46 Even if, however, there were some slight textual hook for the First Respondent's submission, it would be necessary to construe reg 2.55(3) 'subject to the enabling legislation as in force from time to time': Legislation Act 2003 (Cth), s 13(1)(c) ('Legislation Act'). In light of that injunction, I would not construe reg 2.55(3) as purporting to prevent the Minister from exercising the power under s 494A(1) even if it were ambiguous.
47 Even if that were wrong, it would simply give rise to a reading down problem. If the First Respondent's contention were correct, then reg 2.55(3) would be inconsistent with s 494A(1) because it would purport to prevent it from being exercised. Being inconsistent with s 494A(1), it would not therefore be valid for it would lie outside the grant of power in s 504(1). However, s 13(2) of the Legislation Act would then require the regulation to be read down so that it would be 'taken to be a valid instrument to the extent to which it is not in excess of that power'. This would mean that reg 2.55(3) would not be read as purporting to prevent the exercise of the power in s 494A(1).
48 Consequently, the First Respondent's submission does not go anywhere. Regulation 2.55(3) does not, in my view, purport to prevent the power in s 494A(1) being exercised; even if it was ambiguous in that regard, it would not be construed that way because of s 13(1)(c) of the Legislation Act and, even if, properly construed, it did purport to prevent the power in s 494A(1) being exercised it would be invalid and would be read down under s 13(2) so that it did not have that effect. Consequently, I do not accept that reg 2.55(3) prevents the Minister from exercising the power in 494A(1).
49 It will follow from the foregoing discussion that I would accept that there are circumstances in which reg 2.55(3)(c) may be invalid. The issues then become these: first, can reg 2.55(3)(c) be read down in point of principle; secondly, if so, does it have a valid operation; and, thirdly, does the present case fall within the regulation so read down?
50 As to the first issue, s 10(1)(a) of the Legislation Act declares regulations to be legislative instruments. As such, the interpretation of reg 2.55(3) is subject to s 13(2) of that Act which provides:
13 Construction of legislative instruments and notifiable instruments
…
(2) If the making of a legislative instrument or notifiable instrument would, apart from this subsection, be construed as being in excess of the power to make the instrument, it is to be taken to be a valid instrument to the extent to which it is not in excess of that power.
51 Consequently, reg 2.55(3)(c) is to be read down, if possible, to bring it within the power conferred by s 504(1). It therefore becomes necessary to identify whether reg 2.55(3)(c) has a valid operation. If it does, then s 13(2) requires it to be taken as valid to that extent.
52 Combining the language of s 504(1) and s 13(2) of the Legislation Act, it will be seen that a regulation will be invalid to the extent that it is inconsistent with its enabling Act but will be otherwise valid. This may be contrasted with the language of s 109 of the Constitution which deals with the invalidity of state laws which are inconsistent with Commonwealth laws:
109 Inconsistency of laws
When a law of a State is inconsistent with a law of the Commonwealth, the latter shall prevail, and the former shall, to the extent of the inconsistency, be invalid.
53 I do not suggest that the inquiries thrown up in the case of a regulation which is inconsistent with its empowering statute are entirely the same as those which obtain under s 109. For example, a regulation derives its legislative effect from the statute under which it is made. By contrast, a State law does not derive its legislative effect from a law of the Commonwealth with which it is said to be inconsistent but, rather, ultimately from s 106 of the Constitution which continues the constitutions of the States as at the date of Federation. As such, in any inconsistency analysis, there is a relationship between an Act and a regulation which is absent in the s 109 context. There are other differences, too. The principles which govern the interpretation of the two statutes involved in a s 109 context may not necessarily be the same since each is governed by its own interpretation legislation. By contrast, an Act and a regulation made under it are usually interpreted in the same way. Because a regulation is a legislative instrument s 13(1)(a) of the Legislation Act applies the Acts Interpretation Act 1901 (Cth) to the regulation as if it were an Act.
54 There may also be structural features of the relationship between an Act and a regulation which impact on any inconsistency analysis. For example, the scheme of an Act may make evident that the legislature intended that the scheme would be carried into effect by detailed regulations made under very broad statutory powers. In other cases, the fact that regulations were made at the same time as a statute was enacted may make it possible to discern an intention on the part of Parliament that, notwithstanding any inconsistency between the Act and the regulation, the regulation was intended to be valid. In such cases, it may be possible for such contemporaneously prepared regulations to be an interpretative tool where there is ambiguity in the meaning of the statute: Hanlon v Law Society [1981] AC 124 at 193-194 per Lord Lowry; Elazac Pty Ltd v Commissioner of Patents (1994) 53 FCR 86 at 90 per Heerey J; PIPE Networks Pty Ltd v Commonwealth Superannuation Corporation [2013] FCA 444; 212 FCR 542 at [93] per Tracey J; Pearce, Statutory Interpretation in Australia (LexisNexis, 9th ed, 2019) at 126; cf Dietman v Brennan-Kuss [2015] SASCFC 73; 123 SASR 24 at [45]-[46] per Kourakis CJ, Bampton J and Muecke DCJ agreeing. For myself, I would reserve for an occasion when it arises whether this principle requires for its enlivenment the fact that the regulation was tabled before the relevant parliament at the time that the legislation was passed: see, e.g., Plaintiff M47/2012 at [56] per French CJ; Neill v Glacier Metal Co Ltd [1965] 1 QB 16 at 27 per Sachs J; Bailey and Norbury, Bennion, Bailey and Norbury on Statutory Interpretation (LexisNexis, 8th ed, 2020) at 768, citing Legal Services Commission v Loomba [2012] EWHC 29 (QB); 2 All ER 977 at [51], as affirmed in R (CXF) v Central Bedfordshire Council [2018] EWCA Civ 2852 at [24]; Greenberg, Craies on Legislation (Sweet & Maxwell, 12th ed, 2020) at 1118. Without expressing a concluded view, it may be difficult to discern parliamentary approval for the regulation if it cannot be shown that the legislature knew of it.
55 Accepting all of these differences, however, I do not think that any are material to the present appeal, at least not in a way which assists the First Respondent. Thus some benefit may be obtained by considering how facultative powers such as s 494A(1) have been approached in the context of s 109 of the Constitution, whilst keeping in mind the fact that the present question is concerned with the wording of s 504(1) ('not inconsistent with this Act') and s 13(2) of the Legislation Act ('is taken to be valid to the extent to which it is not in excess of that power').
56 So far as facultative powers in Commonwealth statutes are concerned, it has generally been concluded that no conflict with a State law arises until such time as the Commonwealth facultative power is exercised. In Victoria v Commonwealth (1937) 58 CLR 618 ('The Kakariki') the High Court held that a Victorian authority might proceed to exercise its statutory authority to remove the wreck of the steamship Kakariki in the absence of any intervention by the federal authority to exercise the power conferred by the Navigation Act 1912 (Cth) for the removal of wrecks. That approach to facultative powers has been repeatedly referred to with approval: R v Winneke; Ex parte Gallagher (1982) 152 CLR 211 at 216-217 per Gibbs CJ, 221 per Mason J, 233 per Wilson J; Flaherty v Girgis (1987) 162 CLR 574 at 588 per Mason ACJ, Wilson and Dawson JJ, 602 per Brennan J; Commonwealth v Western Australia (Mining Act Case) [1999] HCA 5; 196 CLR 392 at 417 [62] per Gleeson CJ and Gaudron J, 439-441 [138]-[145] per Gummow J, 478 [258] per Hayne J; Momcilovic v The Queen [2011] HCA 34; 245 CLR 1 at 112 [248] per Gummow J.
57 Of course, even where a Commonwealth facultative power is involved it may nevertheless be the case that the surrounding statutory context may make discernible an intention on the part of the Commonwealth Parliament to exclude the operation of any State law, a point made by Latham CJ in Carter v Egg and Egg Pulp Marketing Board (Vic) (1942) 66 CLR 557 at 574. In such a case, a consideration of the Commonwealth law as a whole may indicate that the Parliament intended to cover the field. Whilst the particular power might be facultative, the fact that it had not been exercised would not on this view be material since the field had been covered by the terms of the Commonwealth law viewed as a whole. A similar approach is discernible in the case of an Act and regulations made under it: see Plaintiff M47/2012 at 41-42 [133]-[134] per Gummow J.
58 However, that principle has no analogy with the present case. The terms of the Act do not show an intention on the part of Parliament to deal with the topic of how documents are given to persons to the exclusion of any regulation. On the contrary, the terms of the Act show that regulations on this topic were foreseen and intended since the regulation making power in s 504(1)(e) provides for regulations 'making provision for and in relation to: (i) the giving of documents to … any other person … for the purposes of this Act'.
59 Once it is accepted that the making of regulations about that topic is not excluded by terms of the Act, there is nothing to distinguish the facultative power in s 494A(1) from facultative powers of the kind considered in The Kakariki. The First Respondent submitted, however, that this case could be distinguished from The Kakariki. Here the point was that in The Kakariki there were two decision makers acting under separate enactments. By contrast, in this case there is but one decision maker potentially acting under two different provisions. Whilst I accept this is a difference I do not accept that it is a relevant difference. In particular, I do not think that the outcome would have been any different in The Kakariki if the State power had been conferred on the federal body as an exercise of co-operative federalism: Re Cram; Ex parte NSW Colliery Proprietors' Association Ltd (1987) 163 CLR 117 at 130-131 and Re Wakim; Ex parte McNally [1999] HCA 27; 198 CLR 511 at 576-577 [113] per Gummow and Hayne JJ. The State power to remove the wreck would remain available until such time as the federal power was exercised. I do not therefore accept that the present situation can be distinguished from The Kakariki on the suggested basis.
60 Consequently, and consistent with that line of authority starting with The Kakariki, no question of inconsistency between s 494A(1) and reg 2.55(3)(c) can arise until the power in s 494A(1) has actually been exercised. Since it has not been exercised, there can be no inconsistency.
61 Since no question of invalidity arises in this case, I do not think it is necessary or appropriate to enter upon the extent to which reg 2.55(3)(c) might need to be read down pursuant to s 13(2) of the Legislation Act. That question should await a case where the power in s 494A(1) is exercised.
62 For completeness, two further matters should be noted. The first is the decision of Mortimer J (as her Honour then was) in Butt v Minister for Immigration and Border Protection [2014] FCA 1354; 227 FCR 359 ('Butt'). In that case, her Honour concluded that ss 494A-494C could not apply, as a matter of construction, to a provision of the Act which required the notification of a cancellation decision to be given to a person in a 'prescribed way' (s 127(1)). I respectfully agree with this conclusion. Thus, whilst I accept that the regulations cannot validly operate where the power in s 494A(1) has been exercised, Butt demonstrates that the power in s 494A(1) is not available to be exercised in cases where the provision in question refers to the giving of a document in a 'prescribed way'.
63 The evidence before Mortimer J involved two notifications and both could be seen, at least as a matter of text, as exercises of power under both ss 494A-494C and reg 2.55. On the facts, her Honour found that the first notification had been validly given under the regulation. There was, therefore, no occasion for her Honour to consider the question posed by this appeal which is whether there is any inconsistency between the regulation and s 494A(1) where the latter has not been exercised.
64 The second matter is the Full Court's decision in Zhang v Minister for Immigration and Citizenship [2007] FCAFC 151; 161 FCR 419 ('Zhang'). There the Full Court rejected an argument that s 494A overrode reg 2.55. Although the application of Zhang to this case would lead to the same conclusion I would reach, namely, that the notification was validly given to the First Respondent under the regulation, I would prefer not to rely upon Zhang to arrive at that conclusion. There are a number of aspects of Zhang which appear to me to be problematic and I would reserve the correctness of that decision to an occasion when it is necessary to decide it.
65 In those circumstances, I would reject the First Respondent's contention that reg 2.55(3) is invalid. The facultative nature of the power in s 494A(1) was raised by the Court with the parties after the conclusion of the hearing and supplementary submissions were received. In due course, the Minister should have leave to amend his notice of appeal to raise the argument.
66 For those reasons, in my respectful opinion, the trial judge erred in concluding that reg 2.55(3) was invalid although, as I have said, the facultative nature of s 494A(1) was not put to him. For the same reasons, the conclusion of Driver J in EUF20 v Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs [2021] FCCA 436 that there was an inconsistency between reg 2.55(3) and s 494A(1) is incorrect and must be overruled.