Nu Tireni · Evidence Series · Part 21 · 1941

Te Heuheu: why can Te Tiriti not automatically override an Act of Parliament?

The Privy Council applied the act-of-state and treaty-incorporation doctrines: treaty obligations are not directly enforceable in domestic courts unless Parliament has incorporated them into New Zealand law.

Act of state · Treaty incorporation

Hoani Te Heuheu Tukino v Aotea District Māori Land Board is one of the most important cases in the entire bridge.

The Privy Council held that rights said to arise under a treaty of cession are not, merely because they appear in that treaty, directly enforceable in the municipal courts of the acquiring state. For a Treaty right to operate as domestic law, it must have been incorporated by legislation.

The judgment relied on the broader imperial “act of state” doctrine: the acquisition or annexation of territory is an act of state, whether brought about by conquest, treaty cession or occupation. Municipal courts created by the new sovereign do not sit in judgment on the sovereign act by which the territorial legal order was established.

This is much more significant than saying simply that “the Treaty is not law”. The decision structures the relationship between the founding agreement, the sovereign legal order and Parliament.

Parliament may choose to make Treaty obligations enforceable, as it later did in particular statutes. But the Treaty does not, under this orthodox doctrine, operate as a superior-law instrument capable by itself of invalidating an inconsistent Act of Parliament.

The court does not use Te Tiriti to test the validity of the sovereign legal order. The sovereign legal order decides when Te Tiriti is judicially enforceable.

Primary, judicial and official sources

NZHistory — Hoani Te Heuheu Tūkino VI and the 1941 Privy Council ruling ↗

Waitangi Tribunal — Stage 2 discussion of Te Heuheu and treaty incorporation ↗