The alleged offences were committed between January 2011-July 2013. The total of unpaid tax is estimated to be about $950,000.
The Crown allege while trading under the name Nga Uri o Tupoto, the five knowingly did not provide information on Income Tax and GST returns to the Commissioner of Inland Revenue when required to do so by law.
The group is challenging the District Court's jurisdiction to hear their case, claiming they've been acquitted of wrongdoing by the Ngai Tupoto Native Council in Hokianga, and that its mana superseded that of a court of law.
They handed over a copy of the council's judgment during their first court appearance in April last year.
A kaumatua from Hokianga spoke in court then and said a hui was convened where the case was heard and a decision made.
He said their rangatira court was being subordinated by the District Court through proceedings filed by the IRD.
All are self-represented and refused legal representation until yesterday's appearance when they asked Judge de Ridder time to engage a lawyer. They are presently assisted by a court-appointed amicus curiae.
All were released on bail to re-appear in court this morning. The trial is set down for two weeks.