Former Te Tai Tokerau MP Hone Harawira set the ball rolling by setting up teams to run checkpoints to ensure outsiders were not sneaking in to the region.
Harawira told Morning Report that Māori would be "whacked" if Covid-19 got into his community.
"For us the greatest concern is the fact that Māori have those existing pre-conditions, medical conditions which are a breeding ground for Covid. We're talking lung cancer, respiratory problems, pneumonia, rheumatism, kidney disease, liver disease those things are rife within Māori communities.
"Our concern is simply that if we downgrade the alert now and Covid does get into our communities it's going to be too late to try to get it out later and our people will get whacked."
He said the vast majority of people supported the checkpoints into the region.
"We've had close discussions with the police about what we do and they've suggested how we should change the way we're doing things and we're really adaptable to ensure that traffic flows, it's not being held up for hours and hours. But that we're passing on genuine warnings and health information and giving numbers to people should they be concerned so they know where they can go to."
Harawira said it was not the intention to drag out level 4 restrictions "forever and a day".
"I am concerned however that having gone there [level 4] we relax it, Covid-19 gets into rural communities and we can't get it out again, that's the concern - it's not about we want to drag this on forever and a day."