Any residential address in South Waikato or Bay of Plenty that connects to the UFF network is eligible.
Available 1st - 31st October for South Waikato customers or 18th - 31st for Bay of Plenty customers.
Availability map: https://www.ultrafastfibre.co.nz/nz-fibre-map/
Almost (if not) all ISP are eligible: https://www.ultrafastfibre.co.nz/internet-providers-nz/
Why are there suddenly additional incentives to get stuff that benefits you already?