Former Labour MP Chris Carter will be voting with the Green Party from now on.
The Te Atatu MP is an independent in Parliament. He was expelled from the Labour Party in October following disciplinary action after he sent an anonymous letter to news media alleging a coup against leader Phil Goff.
Mr Carter pledged his proxy vote to Labour saying he still believed in the party's principles.
However, he today issued a statement saying that the Greens would now be casting his vote and he had signed an agreement with them.
He said Labour had only irregularly used his vote and one of the party's MPs, Trevor Mallard, said publicly that he had not given it to the party.
The Greens would let him vote with Labour when he chose.
"The Greens are a progressive party which is similar to Labour in many values and policies. However there may well be issues where we differ and I have the opportunity to vote with Labour on those occasions."
Under the agreement the Greens would use Mr Carter's votes with their own except on issues where he told them he wanted to vote differently. The party also gets his supplementary questions except when he decides to use them.
Green Party musterer (whip) Kennedy Graham said the agreement was about representation.
"Our sole aim is to help the voters of Te Atatu have their voice heard in Parliament. It is impractical, otherwise, for an independent MP to be present in the House for every vote on every Bill, every amendment, every motion, etc."
He said the party would use Mr Carter's proxy as long as he was an MP and either party could withdraw should they wish.
"Given the Government's majority this term, the agreement may not have much material effect, but that's not the point. The point is that the people of Te Atatu have elected a Member of Parliament to represent them and, like all New Zealanders, they deserve full representation and for their vote to count. We are making that happen."
NZPA