"Sometimes when someone has passed away and no one has succeeded their shares we have no idea where the ownership lies," he said.
The low thresholds on certain decisions will allow Rotoiti 15 more flexibility over how it uses the land, Mr Tahana said.
"In our minds there was no need to go to court for a lot of those things," he said.
"This brings us into line with other land legislation."
Mr Tahana said it was important for people to remember this was an "evolving space".
"It will never be perfect, but we're moving in the right direction," he said.
"We all own it together, we all work it together, we all benefit together."