The latest round of hui kicked off on October 12 with the last Northland hui being held on Sunday - hui are still being held around the country and in Australia.
In a statement, Ngāti Manū said that at the consultation hui many hapū representatives spoke out against the Crown process.
"Only Ngāti Manu speaks for Ngāti Manu. Ngāti Manu continues to assert our hapū rangatiratanga," the statement said.
Introducing a hapū withdrawal mechanism was recommended by the Waitangi Tribunal following an urgent inquiry into the Crown's recognition of Tūhoronuku's mandate.
In a presentation prepared for the hui it said the Crown's ability to engage on mandate work with hapū will depend on Office of Treaty Settlements (OTS) resource and capacity at any given time.
It said at this time, OTS has no capacity for any additional mandate.
"Even if mandate for exited hapū is achieved that does not mean the Crown would be able to commence direct negotiations immediately. The Crown negotiating resources are already committed to the end of 2020," it said.
Feedback and submissions of the proposals will be assessed on October 23.
A final proposal will be considered on October 25 by Te Rōpū Tūhono, before further consultation and a potential vote in December, which will need 75 per cent member support and 65 per cent support of hapū to progress towards Treaty settlement negotiations.
Once finalised, the settlement is expected to be worth hundreds of millions of dollars to Ngāpuhi.