Constitution Act 1986

Section 5 - Demise of the Crown

• The death of the Sovereign shall have the effect of transferring all the functions, duties, powers, authorities, rights, privileges, and dignities belonging to the Crown to the Sovereign's successor, as determined in accordance with the enactment of the Parliament of England intituled The Act of Settlement (12 & 13 Will 3, c 2) and any other law relating to the succession to the Throne, but shall otherwise have no effect in law for any purpose.
   
• Every reference to the Sovereign in any document or instrument in force on or after the commencement of this Act shall, unless the context otherwise requires, be deemed to include a reference to the Sovereign's heirs and successors.

What does that mean?

The functions, duties, powers, authorities, rights, privileges, and dignities belonging to the Crown of England, are transferred to the Sovereign's heir's and successors. The Sovereign's heir's and successors are the Crown of the Mauri Nation as Mandated in Te Tiriti o Waitangi 1840.