Maori and possible Pacific Island. I'm not sure how it was justified but I imagine probably because of worse health outcomes for those groups.
Trying to correct an inequality with another inequality is still discrimination. People who want that should be honest and identify themselves as racists, not the ones who want to stop racism.
But I can now see there is more to the issue. Racism is classically believing one (your) race is better than another, and the implication of "race-based" X is the favour one race based one that belief.
Trying to correct historical inequalities isn't an obvious case of "racism".
There are Maori people who want to favor their own race based on the belief that they have more rights than other races due to their ancestry. They call themselves "people of the land" to distinguish themselves from "people of the treaty" - or people whose ancestors signed up for those rights instead of inheriting them. This is a widely popular belief. So even by your definition, that's racist. It doesn't just stop being racist when there are also people of other races believing the same thing.
this sounds like a suspicious characterisation - how are they trying to undo systemic racism, and what do they identify as "systemic racism"?