Ill-health has forced King Tuheitia to stand down from public-speaking arrangements and choose his eldest son to represent him in the immediate future.
A King's Council will also be established to advise the son, Whatumoana Te Aa Paki.
Iwi leaders and members of the kahui ariki (royal family) met at Turangawaewae House, Ngaruawahia, yesterday where King Tuheitia, who is 58, told them that Te Kaunihera a te Kiingi (the King's Council) had been established, and his elder son would represent him until his health improves.
A statement from the King's office said his ill-health was affecting his ability to carry out his official duties.
Waikato Tainui tribal heavyweight and former MP Tukoroirangi Morgan, who was appointed a member of the King's Council, said iwi leaders endorsed Whatumoana filling in in his father's absence.