Mr Horan had claimed in a complaint to Speaker of the House David Carter that Parliamentary Service funding to run NZ First's offices in Parliament had been used for party political purposes including fundraising activities.
However, a spokesman for Mr Carter this morning said an investigation into the claims had been concluded and "no further action will be taken unless further evidence is produced".
"NZ First is disappointed that both it, and Parliamentary Services, have been forced into an extensive, time-wasting exercise because of baseless claims by a disgruntled member of Parliament, Brendan Horan", Leader Winston Peters said this morning.
"NZ First's parliamentary staff have been put through unnecessary scrutiny, because of these claims.
"This has been a disgraceful abuse by an MP of the process around parliamentary funding, and New Zealand First is concerned at the undue media attention and time this MP's abuse of process has been given."
Mr Peters noted that the National Government had given some if its question time in Parliament to Mr Horan to enable him to make "a number of baseless allegations".
"NZ First believes that MP and the Government should now apologise to New Zealand First, the Speaker, and the public for these dirty underhand tactics."
- Adam Bennett of the New Zealand Herald
