The Electoral Commission is urging anyone not yet enrolled to vote in the eastern Maori electorate of Ikaroa-Rawhiti to sign up before a by-election in June.
The seat was held by the late Parekura Horomia, and a by-election to select another Member of Parliament will take place on the 29 June.
The Maori and Labour parties are planning to put forward candidates for the seat, which Mr Horomia had held for Labour since 1999.
Maori people can enrol to vote if they have lived in the electorate for more than one month, are aged 18 years or older and have lived in New Zealand for more than one year continuously at some point in their lives.
Chief Electoral Officer Robert Peden says the deadline for enrolments is the day before the by-election, but people who sign up earlier will be given an EasyVote card, which will make it easier to take part.
There were 32,415 people enrolled to vote in Ikaroa-Rawhiti as of 30 April.