"The phrase 'in trade or commerce' in s 52 has a restrictive operation. It qualifies the prohibition against engaging in conduct of the specified kind. As a matter of language, a prohibition against engaging in conduct 'in trade or commerce' can be construed as encompassing conduct in the course of the myriad of activities which are not, of their nature, of a trading or commercial character but which are undertaken in the course of, or as incidental to, the carrying on of an overall trading or commercial business. If the words 'in trade or commerce' in s 52 are construed in that sense, the provisions of the section would extend, for example, to a case where the misleading or deceptive conduct was a failure by a driver to give the correct handsignal when driving a truck in the course of a corporation's haulage business. It would also extend to a case, such as the present, where the alleged misleading or deceptive conduct consisted of the giving of inaccurate information by one employee to another in the course of carrying on the building activities of a commercial builder. Alternatively, the reference to conduct 'in trade or commerce' in s 52 can be construed as referring only to conduct which is itself an aspect or element of activities or transactions which, of their nature, bear a trading or commercial character. So construed, to borrow and adapt words used by Dixon J in a different context in Bank of NSW v Commonwealth [1948] HCA 7; (1948) 76 CLR 1 at 381, the words 'in trade or commerce' refer to 'the central conception' of trade or commerce and not to the 'immense field of activities' in which corporations may engage in the course of, or for the purposes of, carrying on some overall trading or commercial business.
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It is plain that s 52 was not intended to extend to all conduct, regardless of its nature, in which a corporation might engage in the course of, or for the purposes of, its overall trading or commercial business. Put differently, the section was not intended to impose, by a side-wind, an overlay of Commonwealth law upon every field of legislative control into which a corporation might stray for the purposes of, or in connection with, carrying on its trading or commercial activities. What the section is concerned with is the conduct of a corporation towards persons, be they consumers or not, with whom it (or those whose interests it represents or is seeking to promote) has or may have dealings in the course of those activities or transactions which, of their nature, bear a trading or commercial character."