Clive Palmer says he will challenge the decision of an international tribunal to dismiss his claim for $305bn in compensation from the commonwealth government, by appealing to a court in Switzerland.

On Saturday the attorney general, Michelle Rowland, announced that the permanent court of arbitration, in The Hague, the Netherlands, had ruled against the Queensland mining magnate.

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The investor-state arbitral tribunal, which mediates free trade disputes between foreign investors and the states in which they invest, dismissed Palmer’s claim that a decision blocking a Pilbara mining proposal violated international law. It ordered him to pay more than $13m, Rowland said. The decision has not yet been published on the court’s website.

“Mr Palmer is not a ‘fo

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