New Zealand First leader Winston Peters has again used parliamentary privilege to grill United Future leader Peter Dunne on leaking official documents.
In a select committee discussion on student loans this morning, Mr Peters asked the Mr Dunne, the Revenue Minister, whether the Inland Revenue Department prioritised and enforced privacy.
"Would any leak that [came] from the department be seriously investigated?" Mr Peters asked.
Mr Dunne said that the IRD had not dealt with any leaks of information, but if it did, it would be rigorously investigated.
He said that Mr Peters' questions about leaking information to the media were "speculation".
"I can assure you that I have never, ever released any information relating to any taxpayer in any situation."
Committee chair Sam Lotu-Iiga repeatedly urged Mr Peters to ask questions that were relevant to the discussion on student loans.
Mr Dunne invited Mr Peters to provide evidence of his allegations.
After the committee, Mr Dunne told media that he was not aware of any leaks at the IRD and he "had no idea" about Mr Peters' allegations.
Mr Peters has repeatedly accused Mr Dunne of leaking the Kitteridge report on the GCSB in the House and in select committees.
The report revealed more than 80 instances of potentially illegal spying on New Zealanders by the Government agency.