Yesterday Prime Minister Jacinda Ardern said she expected the Green Party to support a waka-jumping bill, which would ensure a party proportional representation remained intact if a party expelled one of its MPs.
Ardern said the discretion in the bill for party leaders to manage their MPs should make it amenable to both NZ First and the Greens.
The bill, which is part of the Government's 100-day programme, is expected to have a high threshold for expelling an MP. One suggestion was to have at least two-thirds of caucus support before an MP could be kicked out.
The Greens can oppose government legislation as part of its confidence and supply arrangement with Labour.
But the same agreement also binds the Greens to act in good faith and allow Labour to comply with its agreement with NZ First, which specifies passing a waka-jumping bill.