The Green Party has voted to leave the door open to a confidence and supply agreement with National after the general election in November.
Before the last election, the Greens announced they could not form a Government with the National Party, or support it on confidence and supply, but could work with it in areas where they have common ground.
At their annual meeting in Auckland on Sunday, the Greens made a final decision that they could form a Government with the Labour Party or support it on confidence and supply.
But they ruled out forming a Government with National.
They said they could work with National on confidence and supply, though such an arrangement would be highly unlikely.
Priority on lifting children out of poverty
Co-leader Metiria Turei has put forward a plan she says will lift 100,000 children out of poverty.
She told the conference that about 240,000 children live in poverty in New Zealand, which is a disgrace.
She says the Greens would introduce an in-work tax credit for beneficiaries and extend the training incentive allowance.
Ms Turei said that finding the money to make the changes is a question of choice for the Government.
She said a Green Government would make getting children out of poverty a high priority.