Trans-Tasman Resources will argue the Environmental Protection Agency did not apply the law correctly when declining consent to mine the South Taranaki seabed.
The company released documents outlining the basis of its appeal this week which will ask the High Court to make the EPA reconsider its application.
TTR also wants compensation for the increased costs brought about by the appeal.
Among its arguments will be that the EPA did not base the decision on the best information available, did not adhere to the Exclusive Economic Zone Act requirements and failed to apply expert evidence to the decision. TTR will argue process was favoured over content with the hearings rushed to fit into a timeframe.
TTR announced its decision to appeal, as was widely expected, on July 1.
