Indigenous Maori in New Zealand have had the option of one of two electoral rolls. There's the general electoral roll and the Maori roll, and there are a number of Maori seats throughout the country. The number will increase or decrease with the movement in that population. It's increasing and it has been for years now because there's a higher birth rate amongst Maori than other New Zealanders. So only people of Maori descent may vote or stand for election for those seats, and they were introduced very early in the New Zealand Parliament's history as a way of ensuring representation from Maori. There have been calls in recent years to abolish them primarily on the basis that there are actually a disproportionate number of Maori MPs in the House. There are more MPs of Maori descent than there are Maori in the general population... No party really seems to be willing to be the one that abolishes them, so I imagine they are here for the time being.
On May 17th, 2016. See this statement in context.