More big-name law firms have lined up to criticise regulations that would get tough on company directors.
An amendment before the commerce select committee would make it a criminal offence if a director was in "serious breach" of their obligations to act in the best interest of a business and protect it from risk of serious loss.
This month Chapman Tripp publicly released its submission on the changes and told the Government the costs of reform would outweigh its benefits.
The heavyweight law firm said the proposed provisions may make directors more afraid of taking risks, which is at loggerheads with boosting innovation, productivity and growth.
While the changes are based on an apparent hole in existing law, Chapman Tripp said there was no evidence that "errant directors are escaping accountability" and pointed to the recent prosecutions of failed finance company directors.