The Waitangi Tribunal panel at the hearing into government reforms to Treaty clauses, from left Dr Paul Hamer, Chief Judge Dr Caren Fox and Derek Fox.

An iwi leader has described the coalition government as "the most racist, anti-Māori government ever to come to power", telling the Waitangi Tribunal its review of Treaty clauses across legislation amounted to an "unrelenting assault" on Māori rights.

Tukoroirangi Morgan appeared before the Tribunal on Wednesday for day two of the Treaty Principles Reform Urgent Inquiry, giving evidence on behalf of Te Whakakitenga o Waikato and the National Iwi Chairs Forum.

The inquiry is examining Cabinet decisions to amend, standardise or repeal references to the principles of Te Tiriti o Waitangi across 19 pieces of legislation.

When the amendments were announced last month, Justice Minister Paul Goldsmith said they would ensure references to the principles of the treaty are clear and consistent.