New Zealand First has added the retention of the Accident Compensation Scheme in its current form to its list of bottom lines.
Party leader Winston Peters has already stated a rewrite of the Reserve Bank Act would also be non-negotiable after the election.
He says the bank should have to take account of factors other than inflation when it raises interest rates.
On TV One's Agenda programme on Sunday 2 November, Mr Peters said National's policy on ACC equates to privatisation, and retaining the corporation in its present form would be a bottom line for his party.
However, National is standing by its decision to rule out any post-election relationship with New Zealand First, or Mr Peters.
