Relevant principles
15 The power to make the injunctions sought by the applicants is found in, as applicable, s 23 of the Federal Court of Australia Act 1976 (Cth), s 115(2) of the Copyright Act 1968 (Cth) (Copyright Act), s 126(1) of the Trade Marks Act 1995 (Cth) (Trade Marks Act) and s 80(2) of the Competition and Consumer Act 2010 (Cth) (Competition and Consumer Act).
16 Derrimut must establish that there is a serious question to be tried and that the balance of convenience favours the granting of the injunctions: Australian Broadcasting Corporation v O'Neill [2006] HCA 46; 227 CLR 57 at [19] per Gleeson CJ and Crennan J and [65]-[72] per Gummow and Hayne JJ.
17 As indicated, the applicants seek a mandatory injunction as well as a prohibitory injunction. The principles relevant to the granting of interlocutory injunctions generally, and mandatory interlocutory injunction specifically, were summarised as follows by Edelman J in Ocean Dynamics Charter Pty Ltd v Hamilton Island Enterprises Limited [2015] FCA 460:
26 The principles concerning interlocutory injunctions were not in dispute. They were clearly set out by the Full Federal Court in Samsung Electronics Co Limited v Apple Inc [2011] FCAFC 156; (2011) 217 FCR 238. Where an interlocutory injunction is sought in respect of private rights, it is necessary to identify the legal or equitable rights which are to be determined at the trial and in respect of which the final relief is sought (Samsung, 256 [52]). There are two questions:
(1) has the applicant established a prima facie case (in the sense that if the evidence remains as it is there is a probability that at the trial of the action the applicant will be held entitled to relief); and
(2) does the balance of convenience and justice favour the grant of an injunction or the refusal of that relief?
27 The balance of convenience includes a consideration of whether the refusal of the injunction would have the effect that the applicant will suffer irreparable injury for which damages will not be adequate compensation (Samsung, 259-260 [61] - [63]).
28 The two questions are not independent (Samsung, 261 [67]). The more that the balance of convenience supports a respondent, and the more serious the consequences for a respondent, the stronger will be the prima facie case that the applicant may need to establish to support an interlocutory injunction. Conversely, in a case like this where the balance of convenience strongly favours the applicant, then the strength of the prima facie case required to support the interlocutory injunction diminishes.
29 Although the court will often examine the strength of a case for an interlocutory injunction, the court will not normally "undertake a preliminary trial" and will rarely attempt to resolve disputes of fact: Beecham Group Ltd v Bristol Laboratories Pty Ltd (1968) 118 CLR 618, 622 (Kitto, Taylor, Menzies, and Owen JJ) quoting Linfield Linen Pty Ltd v Nejain (1951) 51 SR (NSW) 280, 281 (Roper CJ in Eq). And the extent to which the court will consider the merits of disputes as to legal issues will depend on the circumstances of the case. There is no inflexible rule (Samsung, 260 [64]).
30 There has been conflict in the authorities about whether these principles should apply equally to mandatory interlocutory injunctions. As I explained in JTA Le Roux Pty Ltd v Lawson (No 2) [2013] WASC 373 [15] - [23], I consider that the same principles should apply.
31 There are a number of authorities which suggest that different tests could apply depending on whether the interlocutory injunction is mandatory or prohibitory: Australian Airlines Commission v Commonwealth (1986) 17 FCR 445, 451 - 452; Midland Milk Pty Ltd v Victorian Dairy Industry Authority (1987) 82 ALR 279, 291; Active Leisure (Sports) Pty Ltd v Sportsman's Australia Ltd [1991] 1 Qd R 301, 304; 314 - 315; Storm Financial Ltd v Commonwealth Bank of Australia [2008] FCA 1991 [5]; Ryan v Electricity Networks Corporation [2009] FCA 734; (2009) 185 IR 201, 203 [7]; BGC Construction Pty Ltd v Minister for Works [2009] WASC 398 [19]; Parmalat Australia Pty Ltd v VIP Plastic Packaging Pty Ltd [2013] FCA 119; (2013) 210 FCR 1, 11 [17].
32. These authorities generally followed comments of Gibbs CJ sitting at first instance in the High Court of Australia in The State of Queensland v Australian Telecommunications Commission (1985) 59 ALR 243, 245. The Chief Justice quoted from Halsbury's Laws of England and from Megarry J and said that a mandatory interlocutory injunction will not normally be granted; the court should have a "high degree of assurance" that following a final contested hearing the result would be no different to the result if the injunction were issued. It might be doubted whether Gibbs CJ intended that these remarks be taken as a general rule. In any event, the remarks were, however, qualified by his Honour's observations (which do not appear to have been intended to be exhaustive) of various circumstances in which a mandatory interlocutory injunction might be granted.
33 The better approach is, as Kiefel J has explained, that the classification of an injunction as 'mandatory' should not automatically attract a requirement that the Court should have further confidence in the correctness of the order: Racecourse Totalizators Pty Ltd v Totalisator Administration Board of Queensland (1995) 58 FCR 119, 123. The focus should be on the effect of the proposed order. A prohibitory injunction is capable, in some cases, of having a more serious effect on the parties than a mandatory one. There can also be a fine line between an order which requires something to be done and an order which prohibits something from being done; sometimes the former can be re-characterised as the latter. Merely characterising an interlocutory order as "mandatory" should not invite a different approach.
34 Nevertheless, there will often be characteristics of a mandatory interlocutory injunction that weigh against making such an order. One of those characteristics is the potential for mandatory orders to interfere with a person's liberty to a greater degree than a prohibitory order. Another is where an interlocutory mandatory injunction will have the effect that a defendant who has raised a triable issue will be deprived, by a mandatory order, of a full hearing of the issue if the effect of that mandatory order is final determination of the proceedings …