"They only pick pieces of the Treaty when they want to and they don't consult, they don't talk to us about it and they just go ahead and make the process, for example the asset sales."
However a narrow majority "felt that this is the only opportunity for us to express our feelings about the Government if they come on.
"Others say that if we stop them coming on the country will ask why and then we can tell them."
While the Government has favoured the Iwi Leaders Forum as a key group through which to engage with Maori, Mr Taurua questioned that group's mandate. The forum this morning began a two-day meeting at Waitangi's Copthorne Hotel.
But Mr Taurua questioned their mandate to represent Maori.
"We don't know what their discussions are, we don't know what they're talking about because they didn't even come in here (to Te Tii) today.
"They went straight to the Copthorne and they're waiting for the Prime Minister. The policy is they're not supposed to drive past here they're supposed to come on to the marae and be welcomed here before they move on. They don't come on because they'll be challenged, for the fact is that they are also undermining the Treaty."
When he arrives at Te Tii tomorrow Mr Key will be met by a hikoi opposed to mining in Northland, which the Prime Minister will tomorrow endorse in his speech as an opportunity to develop the sluggish Northland economy.
But Bryce Smith, a spokesman for Te Wakameninga o nga hapu Ngapuhi, a group which opposes mining told the Herald that protesters were ready "to elaborate" on previous protests.
"Our people are going to deliver a strong message. Key's not going to get it, he never does, none of them ever do. He's not coming to listen.
"My message to him is don't come."
On a more gentler note Education Minister Hekia Parata and Mana Party leader Hone Harawira, along with Mr Taurua and other kaumatua and kuia were among those at a Kawe Mate or tribute to former Labour Maori Affairs Minister Parekura Horomia at Te Tii today.
Mr Horomia, who died in April last year was remembered fondly in a series of speeches which drew many smiles and much laughter.
"I didn't used to like coming here with Parekura", Mr Harawira said in tribute to Mr Horomia's standing at the marae.
"Everyone would say hello to him and not to me."