It was submitted by Mr. Davies Q.C., who appeared for the State of Queensland, that the "purpose" and "result" of the definition of employment in s. 136 of the Assessment Act are not to widen the content of the definition of "employee" in that Act. In my view, that submission should be accepted at least in so far as the "result" of the definition is concerned. There is no use of the word "employment" in any of the four definitions (i.e. those of "employee", "future employee", "former employee" and "current employee") which, in combination, determine the meaning of "employee" for the purposes of that Act. As has been said, the definition of "employment" in the Assessment Act plainly does not operate to extend the scope of the definition of employee in s. 221A(1) of the Income Tax Assessment Act. The only arguable way in which the definition of "employment" could be used to widen the class of persons who are "employees" for the purposes of the Assessment Act would be by the application of the definition to extend the ordinary meaning of the word "employed" in the one place where that word is used (in any tense) in any of those four definitions, namely, in the reference to "a person employed by a State or by an authority of a State" in the additional words of the definition of "current employee". There are, however, two reasons why the definition of "employment" should not be applied in that way. The first is that the Assessment Act contains no provision to the effect that the verb "employ" is to bear a corresponding meaning to the expanded meaning of the noun "employment". The second, and more substantial, reason is that, if the word "employed" in the additional words of the definition of "current employee" were to be given such an extended meaning, the effect would be, when the Assessment Act is read with the Fringe Benefits Tax Act 1986 Cth ("the Tax Act"), to impose upon the States a liability of a different kind to that imposed upon other employers in that the States would be required to pay fringe benefits tax in respect of relevant payments to persons who do not stand in a relationship of a kind which attracts liability to such tax in the case of other employers. In other words, the effect of giving such an extended meaning to the word "employed" in the reference to persons "employed by a State or by an authority of a State" would be to single out the States to make them "the objects of special burdens or disabilities": cf. Melbourne Corporation v. The Commonwealth [56] . That being so, the effect of the application of the definition of "employment" to give an extended meaning to the word "employed" in that special reference to State employees would be to discriminate against the States in a manner that is inconsistent with a fundamental implication of the Commonwealth Constitution: see, generally, Queensland Electricity Commission v. The Commonwealth [57] . In these circumstances, the word "employed" in the definition of "current employee" should, as a matter of construction, be given its ordinary meaning. Even if that were not so and the definition of "employment" would otherwise be applicable to give it an extended meaning, that definition of employment would need to be read down to validity by precluding its application in that regard. On either approach, the result is that, putting to one side a member of a State Parliament, an office holder of a State, who is not "employed" by the State in the ordinary sense of that word, is not an "employee" or "current employee" for the purposes of the Assessment Act. Such an office holder is not an "employee" for the purposes of Div. 2 of Pt VI of the Income Tax Assessment Act: he or she does not come within the general words of the definition of employee in s. 221A(1) since he or she does not receive payments "paid to an employee as such"; he or she does not come within the special provisions of cl. (b) of that definition since he or she is not "employed". Nor, not being "employed", is such an office holder within the additional words in the definition of current employee in s. 136 of the Assessment Act.