High Quality Content by WIKIPEDIA articles! The Official Opposition in New Zealand is usually the largest political party or coalition which is not a member of the ruling government. This means that the political party, while still involved with the political process in New Zealand, they do not have ministers or their supporters in a position of power. This is usually the second-largest party in a legislative house, although in certain unusual circumstances it may be the largest party (due to a larger Government bloc) or even a third or fourth party.