United Future leader Peter Dunne has welcomed the Speaker's decision to renew the party's recognition, effective today.
Speaker David Carter withdrew recognition of United Future as a parliamentary party in late June because it failed to produce the 500 signed membership forms it needed to register as a party.
Mr Dunne, United Future's sole MP, has been treated as an independent since.
He said last month he was submitting more than 500 individually signed declarations from party members to the Electoral Commission in support of an application for re-registration.
Mr Dunne says today's decision by the Speaker is great news and brings to an end what has been a difficult 10 weeks for the party.
The decision means United Future "can get on with business as usual, without unnecessary distraction," he said.
"I want to thank all those party volunteers who worked so hard to secure our re-registration, and commit to them to them that we will now focus fully on the challenge of preparing fully for the 2014 election," Mr Dunne said.
Last month Labour MP Trevor Mallard, and the entire New Zealand First caucus, staged a walk-out from Parliament after the Speaker gave United Future up to eight weeks to apply to be re-registered as a party.