It sounds like the land itself is owned by the Crown, so I guess this is a lease ending?
Also:
Fea said people were given no warning, which had been the hardest thing.
"It's come out of the blue and the reasons they're giving us, they don't justify the 15 years maximum." Selwyn Huts
Fea said residents would be urging the council at the public meeting to reconsider its decision - ideally they would like 30 years before they have to leave.
It's a bit rough for sure but I feel like saying they have been given no warning is a bit odd given they are being given 15 years warning. But I'm guessing they can't exactly sell their houses to move.