The Speaker says there is a "clear set of rules" the Māori Party "chose to ignore".
The Speaker of the House is asking MPs for their thoughts on the matter.
The Prime Minister and Opposition leader will speak.
The Māori Party entered Parliament with a splash, refusing to swear the oath to the Queen alone.
Parliament's MPs are told not to list their phone numbers - but several have them listed online.
Insults and allegations were hurled all over the show.