The commission talked a lot about tone and culture, Leavy says.
"So when you think about why governance matters, it's that the tone and the culture come from the top."
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Hobson Leavy is the sponsor of this year's Deloitte Top 200 Chairperson of the year.
This year's finalists are Port of Tauranga's David Pilkington, Transpower New Zealand's Pip Dunphy and Synlait's Graeme Milne.
When it comes to what makes a great chairperson stand out from a good one, Leavy has a few tips.
"I think it's important that the chair is a good listener, and actually that's one of things we see all the time is that the chair talks all the time and doesn't encourage debate," he says.
"You can't have a debate if there's only one person talking."
But it is a balancing act and they also have to hold management accountable.
"Sometimes governance is too soft and they rely on what they're told," Leavy says.
"The chair needs to set the right tempo. It's very easy just to kick everything down the road to the next board meeting. And sometimes you can't/ you've got to dig in and make a decision.
"So just knowing when something is critically urgent and you've got to move fast and knowing when it isn't is an important skill in the chair."
The stakes are higher now for boards, with a greater degree of personal liability.
That's meant directors having to take a more active role in their companies.
"In the past there was an idea that they were quite removed from the business," Leavy says.
"They were almost guardians not to interfere in the business in any way. That's been a bit dangerous because it has created the impression that they shouldn't get too involved or seek too much information."
Directors these days needed to be much more willing to "deep dive" into pockets of the business.
"I don't mean that they should be trying to run the place, that's not their role, but they do have to be prepared to keep asking questions and for more information than they historically might have.
"There was an example in the Hayne Commission Report where one of the banks had this internal audit report which had been referred to for four years and no one on the board had even asked to see it," Leavy says.
"And that was thing that bit them and ended up getting them into trouble."
Deloitte Top 200 Awards were established in 1990 and are held annually to recognise and applaud outstanding individual and management team performances among New Zealand's largest companies and trading organisations.
Last year's winner for the Chairperson of the Year award was Peter McBride of Zespri International.
All the Deloitte Top 200 winners will be revealed at a gala event being held at Auckland's Spark Arena on December 5.
The evening will also include two special awards – "Visionary Leader" and "Executive of the Decade" announced on the night. Click here for a full list of finalists.