95 The criterion of "appropriate and adapted" has continued to be used in determining whether or not legislation can properly be characterized as legislation that gives effect to treaty or convention obligations: see Richardson v Forestry Commission (1988) 164 CLR 261 at 288-289, 291 per Mason CJ and Brennan J, 303 per Wilson J, 309-312, 314 per Deane J, 336 per Toohey J and 342 per Gaudron J; Victoria v Commonwealth (1996) 187 CLR 416 at 546-547 per Brennan CJ, Toohey, Gaudron, McHugh and Gummow JJ; and Toben v Jones (2003) 129 FCR 515 ('Toben v Jones') at 524 per Carr J, at 528 per Kiefel J and 550 per Allsop J.
96 The question on this appeal is not whether s 22 of the SDA, read with s 9(4) and (10), is constitutionally valid. It plainly is a law capable of being reasonably considered appropriate and adapted to give effect to the Convention. This is because the operation of s 22, read with s 9(4) and (10), depends on whether, in relation to discrimination against women, the prohibition against discrimination on the basis of sex, pregnancy or potential pregnancy, and marital status in the supply of goods and services, gives effect to the Convention: see Queensland v Commonwealth at 239.
97 This appeal is concerned with the question whether, as a matter of statutory construction, s 22, when read with s 9(4) and (10), gives effect to obligations arising from the Convention. Again, an affirmative answer must be given. Under art 2(b), (c) and (e), the State Parties undertook, amongst other things, to adopt appropriate legislation prohibiting discrimination against women; to establish legal protection of the rights of women on an equal basis with men; and to take all appropriate measures to eliminate discrimination against women by any person, organisation or enterprise. Further, the State Parties agreed, by art 5, to take all appropriate measures to modify the social and cultural patterns of men and women, with a view to eliminating prejudices and practices based on the idea of inferiority or superiority of the sexes or stereotyped roles for men and women. Whilst these provisions leave a large measure of discretion to the State Parties, they nonetheless give rise to obligations: compare Tasmanian Dam Case at 132-133 per Mason J, 178 per Murphy J, 231 per Brennan J and 261-262 per Deane J; and Toben v Jones at 550 per Allsop J and the authorities there cited.
98 Section 22, when read with s 9(4) and (10), gives effect to the obligations in these articles. The words in s 9(10) "… in relation to discrimination against women" confine the operation of s 22 to discrimination against women: see below at [70]. There can be little doubt that the legislative prohibition in s 22, given effect by s 9(10), gives effect to the obligations in art 2(b), (c) and (e), in so far as it prohibits discrimination against women on the basis of sex and pregnancy or potential pregnancy by persons engaged in the supply of goods and services. The legislative prohibition could also be viewed as a means of giving effect to art 5 of the Convention.
99 Is the legislative prohibition in s 22 against discrimination on the ground of marital status relevantly different? A short examination of Australian history shows that discrimination against women on the ground of marital status has been commonplace. For example, until relatively recently, there were discriminatory laws throughout Australia against the employment of married women: see "Discrimination in Employment or Occupation on the Basis of Marital Status-I" (1962) 85 International Labour Review 262. Until 1968, only married and unmarried men and unmarried women could be employed under s 49 of the Public Service Act 1922 (Cth). Married women could not be employed unless there were special circumstances justifying their employment. Section 104 of the Commonwealth Banks Act 1959 (Cth) and s 53 of the Broadcasting and Television Act 1942 (Cth) were to similar effect. They were both repealed in 1968.
100 Discrimination against women also took the form of discrimination against women on the basis of their marital status in other countries: see 85 International Labour Review 262. As already noted, the Convention recognises the prevalence of this form of discrimination against women with respect to employment, nationality and choice of identity.
101 In view of this history, in relation to discrimination against women, it is plain enough that the legislative prohibition in s 22, given effect by s 9(10), against discrimination on the ground of marital status by persons engaged in the supply of goods and services also gives effect to the obligations in art 2(b), (c) and (e). Further, the prohibition can also seen as giving effect to the obligation in art 5 - which looks to the modification of social and cultural patterns of conduct to eliminate prejudices based on stereotyped roles for men and women. To the extent that the Registrar argued to the contrary, I would reject those submissions.
102 This does not, however, conclude this case. The final question concerns the meaning and effect of the expression "… in relation to discrimination against women" in s 9(10) of the SDA. As already stated, the words in s 9(10) "… in relation to discrimination against women" confine the operation of s 22 to discrimination against women. Thus, s 22, when effective under s 9(4) and (10), is concerned with discrimination against women in the supply of goods and services and not with discrimination against men in these activities: compare Aldridge v Booth (1988) 80 ALR 1 at 17-18 per Spender J. AB concedes that, by virtue of these words, s 22 cannot protect a man against discrimination on the basis of marital status in the supply of services. The prohibition in s 30C of the State Registration Act is a prohibition directed to all married persons. Does this prohibition nevertheless collide with the prohibition in s 22, as having effect by s 9(4) and (10)? The answer depends on the operation of the words "in relation to discrimination against women" in s 9(10).
103 The application of the limitation in s 9(10) is straight-forward in the case of sex, pregnancy and potential pregnancy discrimination where the victim is a woman. In these cases, the discrimination will necessarily be "in relation to discrimination against women" because the discrimination will flow from the fact that the victim is a woman. As we have seen, this result gives effect to the Convention. As the present case shows, marital status discrimination is different in this sense. Discrimination on the basis of marital status may involve discrimination against women, where, for example, married women are not treated in the same way as married men. Discrimination on the basis of marital status may, however, be gender-neutral, where, for example, all unmarried persons are subject to one regime and all married persons subject to another. In such a case, marriage may be a legitimate criterion for differential treatment.
104 AB argues that s 22, read with s 9(4) and (10), will apply wherever a married woman is the victim of discrimination in the supply of services on account of being a married person. Equally, on AB's argument, s 22, read with s 9(4) and (10), will apply wherever an unmarried woman is the victim of discrimination in the supply of services on account of being an unmarried person. On AB's approach, where the victim of discrimination in the supply of services is a woman, s 22, read with s 9(4) and (10), prohibits discrimination on the ground of marital status per se. The Registrar contends that the effect of these words in s 9(10) is to limit the operation of s 22 to discrimination on the ground of marital status when such discrimination also involves discrimination against women in comparison with men. For the reasons stated below, I accept the Registrar's submissions in this regard.
105 The words "in relation to" in the expression "in relation to discrimination against women" are equivalent to "relating to" and "with respect to". Like them, they have an expansive operation, although one that is necessarily limited by statutory context and purpose: see O'Grady v Northern Queensland Co Ltd (1990) 169 CLR 356 at 367 per Dawson J and 374 per Toohey and Gaudron JJ; Technical Products Pty Ltd v State Government Insurance Office (1989) 167 CLR 45 at 47 per Brennan, Deane and Gaudron JJ; Workers' Compensation Board of Queensland v Technical Products Pty Ltd (1988) 165 CLR 642 at 653-654 per Deane, Dawson and Toohey JJ; and Hatfield v Health Insurance Commission (1987) 15 FCR 487 at 491 per Davies J. In the context of s 9(10), the words "in relation to" require a connection between "discrimination against women" and the prescribed provisions of Pt II, or, relevantly in this case, s 22.
106 The SDA does not define the expression "discrimination against women", but, as we have seen, art 1 of the Convention does. Since s 9(10) makes the operation of provisions such as s 22 depend on the Convention, the definition in the Convention is a relevant guide. In this context, the legislature can be presumed to use the expression in s 9(10) in the same way as it is used in the Convention.
107 Whilst the definition of "discrimination against women" in art 1 is premised on the principle of equality of rights for men and women, the definition also reflects the fact that the means chosen to vindicate the principle depend on placing women's rights on an equal footing with men's: compare arts 1 and 10. This is not the same as securing equality of treatment for unmarried and married persons, where marriage, not sex, is the criterion for discrimination. The definition in art 1 makes adverse discrimination on the basis of being female the touchstone for "discrimination against women".
108 Naturally, the provisions of remedial legislation such as this are to be given a liberal construction that would promote its objects: see Acts Interpretation Act 1901 (Cth), s 15AA. The task of the court is therefore to identify the underlying objects and determine how it may best comply with the injunction in s 15AA. Even so, remedial provisions of this kind cannot be given a meaning they cannot reasonably support. The objects of the SDA are set out above at [15]. Three are presently relevant - as stated in s 3(a), (b) and (d). The first, as stated in s 3(a), has special importance, since, by virtue of s 9(10), s 22 is to have effect to the extent that s 22 gives effect to the Convention. As we have seen, the Convention is not concerned with marital status discrimination per se. The Convention is concerned with discrimination on the basis of marital status that also involves discrimination against women. That is, the Convention is not concerned with circumstances in which all married persons are treated in the same way as one another although differently from unmarried persons.
109 The Registrar's submissions are to be accepted because they take account of the scope of the Convention. The words "in relation to discrimination against women" in s 9(10) limit the operation of s 22 to discrimination on the ground of marital status when such discrimination also involves discrimination against women, where men's rights and freedoms are the standards for comparison. This is the discrimination with which the Convention is concerned. So construed, s 22 gives effect to the obligations created by the Convention. If, as AB maintained, s 22 was construed so as to prohibit discrimination on the ground of marital status per se, wherever the victim was a woman, then the prohibition would travel outside the obligations created by the Convention. This is precisely the result s 9(10) seeks to avoid.
110 If s 22, when read with s 9(4) and (10), is construed to prohibit discrimination on the ground of marital status in so far as such discrimination involves discrimination against women (as a class), the prohibition in s 30C(3) of the State Registration Act, which is directed to all married persons, does not collide with s 22 of the SDA. Section 30C(3) requires the Registrar to discriminate against all married persons on the basis of their marital status. The provision does not require women to be treated less favourably than men on account of being women. Accordingly, there is no discrimination against women, for the purposes of s 9(10), and there is no relationship between discrimination against women and s 22, of the kind required by s 9(4) and (10), in order to give effect to s 22. It follows that s 22 is not given effect by s 9(4) and (10) in the circumstances under consideration.
111 The fact that the prohibition in the State Act may, as in this case, prevent a married person, who has undergone sex affirmation surgery, from having her birth registration altered from male to female, does not affect this conclusion. The State Act would operate in precisely the same way in the case of a married person who has undergone the surgery and seeks to have their birth registration altered from female to male. In this case, the criterion for discrimination is not sex, but marriage.
112 When the other application provisions of s 9 of the SDA are considered, it is obvious that s 9(10) is different from them. This is because, save for s 9(10), the other application provisions give s 22 (and the other prescribed provisions of Pt II) effect on a gender-neutral basis. Section 9(10), however, directs attention to the fact that, if the Convention is in force, then s 22 will have effect "in relation to discrimination against women", to the extent that it gives effect to the Convention. Where s 22 has effect by virtue of other application provisions, it will have a gender-neutral operation.
113 For these reasons, I reject the proposition that, in so far as the State Registration Act operates to prevent the Registrar from altering a post-operative transsexual person's birth registration where that person is in an existing marriage, it is inconsistent with s 22 of the SDA, as applied by s 9(4) and (10). Accordingly, s 109 of the Constitution does not operate to render any part of the State Act invalid. I would dismiss the appeal.
114 I acknowledge that there are some unsatisfactory features of this conclusion. In particular, this conclusion means that, when read with s 9(4) and (10), s 22 ceases to be gender-neutral. This may seem a curious result in view of the gender-neutral language of s 22 itself and the predominantly gender-neutral approach of the SDA. Generally speaking, the SDA is aimed at eliminating sex discrimination in various forms, whether against women or men. The legislature no doubt considered that this was the preferred means of vindicating the principle of equality of men and women: ALRC, Report 59 Pt II at [3.28].
115 The occasion for this difficulty, if this is what it is, lies outside this proceeding - in the Constitution, the SDA and the Convention. In this context, it may be recalled that the SDA does not contain any general prohibition of discrimination on the ground of sex. This has led some legal scholars to criticise the SDA for its limited operation, as well as its undue focus on formal equality: see, e.g., Krysti Guest The Elusive Promise of Equality: Analysing the Limits of the Sex Discrimination Act 1984 (30 March 1999, Research Paper 16, 1998-99, Law and Bills Digest Group). In this regard, it is helpful to recall that the SDA was introduced over twenty years ago. It was a watershed in the legal landscape, in so far as it reflected legislative appreciation of the invidious nature of sex discrimination. Some of its limitations flow from the understanding of the limits on Commonwealth power that then prevailed. Perceived constitutional limits may explain the lack of any general prohibition on sex discrimination and the fact that the application provisions in s 9 are not particularly suited to giving well-ordered effect to the legislation to which they relate. The application provisions are a kind of grab-bag of constitutional legislative powers designed to give as broad a reach as possible to the legislation. In relying on the external affairs power for validity in s 9(10), the legislature was limited by the Convention itself, which as others have said, embodies only a limited concept of equality: see, e.g., Hilary Charlesworth, "Concepts of Equality in International Law" in Grant Huscroft and Paul Rushworth (eds), Litigating Rights: Perspectives from Domestic and International Law (2002, Hart Publishing); and Sally Engle Merry, "Gender Violence and the CEDAW Process" in Human Rights & Gender Violence: Translating International Law into Local Justice (2006, Chicago Series in Law and Society) at 78 and the scholarly works there cited. These considerations may explain what some might regard as the unsatisfactory features of the operation of the SDA, as revealed on this appeal.