Clive Palmer asked the Australia High Court to overturn a new law preventing him from suing the Western Australian government.
The WA government introduced a legislation which aims to stop Mr Palmer from claiming $30 billion in damages from a previous Liberal government which disallowed assessment of the billionaire’s Balmoral iron ore project in Pilbara.
Mr Palmer said the law discriminated against him since he lives in Queensland, and the state government prevented him from selling the Balmoral project to a Chinese company.
The WA government disputed Palmer’s claim, stating the law would still apply even if he lived in the state.
The high court hearing is expected to run for over four days.