I have already remarked, at [78] above that it is undesirable to use the convention "and/or" in a pleading like the present. I am by no means sure that the word "illegitimate" adds anything to "unlawful" in this context. Merkel J seems to have derived "illegitimate" from the analysis of Gyles J in Finance Sector Union v Commonwealth Bank (2000) 106 FCR 16 at 24 from where it can be traced through Schanka v Employment National (Administration) Pty Ltd (2000) 97 FCR 186 to the statement of McHugh JA in Crescendo Management Pty Ltd v Westpac Banking Corporation (1988) 19 NSWLR 40 at 46 that:
'Pressure will be illegitimate if it consists of unlawful threats or amounts to unconscionable conduct. But the categories are not closed. Even overwhelming pressure, not amounting to unconscionable or unlawful conduct, however, will not necessarily constitute economic duress.'
See also Cadbury Schweppes Pty Ltd v Australian Liquor Hospitality and Miscellaneous Workers' Union (2000) 106 FCR 148, where Finkelstein J remarked, at 153 [19];
'… … Pressure will be illegitimate if it involves unlawful action (eg breach of contract or commission of a tort) or the threat of unlawful action. However, as the cases show, there may be duress even if the action, or threatened action, is lawful. … …'
90 Those authorities suggest that "illegitimate" is largely, if not entirely, synonymous with "unlawful" but it may extend to conduct which, although not unlawful, is "unconscionable". However, whatever ultimately be held to be the reach of "illegitimate", it is necessary, I consider, for the applicant to specify separately each action or threat said to be "unlawful", each action or threat said further or alternatively to be "illegitimate" and each action or threat said further or alternatively to be "unconscionable." Particulars should then be given of the acts, circumstances and things said to constitute each unlawfulness, illegitimacy or unconscionability as the case may be. The particulars subjoined to the present par 59 go only to unlawfulness and are essentially circular. If it is to be alleged that the cancellation of the contract was unlawful as a breach of the contract, the particulars should say so with reference to the relevant provisions of the contract. As already explained, that form of unlawfulness could only be alleged against the third respondent as the only other party to the contract with W.M. Loud. However, if the allegation of unlawful action by Sheedy personally is to be persisted in, the relevant particulars should disclose matters amounting to his having procured, or threatened to procure, a breach of the contract by the third respondent.