r 18(1)
The official vertical datums are:
New Zealand Vertical Datum 2016 (NZVD2016):
One Tree Point 1964:
Auckland 1946:
Moturiki 1953:
Gisborne 1926:
Napier 1962:
Taranaki 1970:
Wellington 1953:
Nelson 1955:
Lyttelton 1937:
Dunedin 1958:
Dunedin–Bluff 1960:
Bluff 1955:
Stewart Island 1977.
NZVD2016 is defined in LINZS25009: Standard for New Zealand Vertical Datum 2016.