The New York-based firm warned it was "virtually impossible" for it to comply with listing rules for the 2012 financial statements if a waiver wasn't granted.
"It is simply impracticable to seek to appoint a new auditor that meets the technical requirements of the ARA (Auditor Regulations Act 2011) and have DIL's financial statements completed within the timeframe required by the US regulatory authorities and NZX," the decision said.
Diligent said its shareholders shouldn't bear the brunt of extra costs from appointing a new auditor, and will be harmed if the financial statements have to be delayed.
The government introduced tougher auditing requirements from July last year, having worked with industry since the collapse of Enron in 2001 sparked the dissolution of Arthur Anderson and raised concerns about the oversight of auditing processes.
The new rules got a hurry-up from the collapse of New Zealand's non-bank finance sector, where second-tier auditors were ticked off for lacking the rigour and skill to review those firms.
Diligent's auditor oversight is another embarrassment for the firm after it found it had inadvertently issued executives more options than they were entitled to, tarnishing an otherwise strong operational year.
The company's board found those missteps didn't need the financial statements to be restated.
Diligent's shares slipped 0.2 per cent to $6.30 yesterday, and have gained 15 per cent this year. It shrugged off a 'please explain' from the stock exchange earlier this month after the share price climbed by more than a quarter in a week on volumes that were ten times the norm.