The Gisborne-Tolaga Bay area is expected to be bursting at the seams over the next few days during Parekura Horomia's tangi.
David Shearer will lead a Labour party delegation to Hauiti marae today.
Acting leader Grant Robertson says it will be quite an occasion.
"The people of Tolaga Bay have always loved and respected Parekura, and they'll be pulling out all the stops.
"This will be one of the largest tangi we've seen, certainly in my lifetime in New Zealand, and that'll be a mark of respect for the man he was."
Mr Robertson says Horomia would not want people to be morose.
"This needs to be a celebration of Parekura's life, and what he has contributed, and there will be plenty of stories.
"We'll all be running through those great phrases - like 'matrix of dysfuctionalism' - that he used to use in Parliament."
And politicians will wait until after Parekura Horomia's funeral on Saturday before turning their attention to the by-election in the Ikaroa-Rawhiti seat.
Parliament's Speaker will announce to Parliament, most likely next week, that there is a vacancy in the Maori electorate.
The Governor-General will have 21 days to act on the advice of the Prime Minister and announce a by-election date.
Newstalk ZB political editor Barry Soper says it is somewhat ironic that John Key will be offering advice in a by-election that National will not be standing in.
Other parties will reveal their plans for others, after mourning for Mr Horomia is over.
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