A refugee organisation says legislation addressing a potential mass arrival of asylum seekers should not be passed, despite improvements in the bill.
The Government has the numbers to press ahead with the legislation, after United Future leader, Peter Dunne, negotiated changes in exchange for his support.
As drafted, the bill would have meant asylum seekers arriving in a group of 11 or more could be detained under a group warrant, but that number will be raised to 30.
There will also be a review of family reunification.
The ChangeMakers Refugee Forum in Wellington said that although the changes are better, the bill will create a second class of refugees.