The legal issue was costs apportionment. The ordinary starting point is that costs follow the event, meaning the successful party usually gets its costs. Because Mercato Centrale had ultimately succeeded overall, that starting point favoured a costs order in its favour. But that was not the end of the matter.
The Court also recognised that costs can be apportioned where a successful party failed on discrete factual or legal issues that were significant and separable. The judgment referred to the Full Court's decision in Les Laboratoires Servier v Apotex Pty Ltd for that principle. Caporaso argued that Mercato Centrale should recover only 50% of its costs because Mercato Centrale had failed on important issues, including arguments under s 41 and s 88(2)(c), and because Caporaso had succeeded on deceptive similarity in relation to the Plain Word Mark.
The Court therefore had to weigh several things at once. It considered Caporaso's success on deceptive similarity, the significance of Mercato Centrale's failed distinctiveness-related arguments, the fact that Mercato Centrale's success on ownership rested on a narrower factual basis than the broader case it had advanced, and Caporaso's complaint about the cost of two senior counsel. It also had to consider the effect of Caporaso abandoning ACL, passing off, personal and some infringement claims during the trial.
This is a very practical issue for businesses. A costs dispute is often not about who won every point. It is about whether the unsuccessful points were substantial enough, and separate enough, to justify reducing the successful party's recoverable costs, and whether the losing party itself caused unnecessary expense by the way it ran the case.