"The runanga will not share any private and confidential details relating to Raniera's employment contract, including pay or leave entitlements," said communications manager Tio Taiaki.
Mr Tau's remuneration for his roles at the Runanga, according to the 2015 Ngapuhi Annual Report, is $92,500 for the 2015 year.
Mr Tau has also voluntarily resigned from his roles as directors of Ngapuhi Iwi Social Services, Ngapuhi Service Station, Ngapuhi Books and Stationary and Ngapuhi Food and Beverage.
He will also extend his stand-down period as director for the Ngapuhi Asset Holding Company for a further three months, making his total stand-down period 16 months.
Te Tai Tokerau MP Kelvin Davis said he believed Mr Tau needed to step down from his role as chairman.
"I think it's appropriate he has voluntarily resigned from those positions. However, I think he should resign from chair and seek a fresh mandate."
Ms Dodd said Mr Tau had apologised for his actions.
"Trustees fully considered the views, opinions and feedback of our people, and it is important to our beneficiaries and Ngapuhi katoa that we continue to move forward in pursuit of our vision, Kia tu tika ai te whare tapu o Ngapuhi - That the sacred House of Ngapuhi stands firm."