Prime Minister Jacinda Ardern met with the surviving victims of the Christchurch Mosque Attacks and families at the Nga Hau E Wha National Marae in Christchurch on Sunday.
Those at the meeting received an advance copy of the commission's report.
After the meeting, she said that some of the recommendations of the Royal Commission will be acted on immediately, which others will take more time.
Speaking to Morning Report, Ardern reaffirmed her commitment to ensuring action comes out of the 800-page long report.
"I found it very difficult to read, it really does go through and give an account of a lot of detail. We cannot put the community through that without making sure that we are responding to what it finds."
Ardern also commented on witnesses' complaints they will not be able to access the report until a couple of hours before its release on Tuesday.
She said if witnesses were also given the report in advance the list would grow too large.
"When you take into account the larger number of those who were affected by being witnesses - and we absolutely acknowledge they were deeply affected by March 15 - that starts numbering into roughly 200. And so yes, it is unusual to do what we've done releasing something so early, but we did have to make a call, as to how widely it was distributed."
Ardern said the point of giving the injured and bereaved copies of the report was to give them the chance to digest the information in private.
"If we are in the order of 200 being distributed, you know, we do run the risk of not having that space for people to take it privately."
