Legislation modernising the rules about Royal succession to the throne has passed its third and final reading in Parliament.
The Royal Succession Bill puts in place changes that were agreed to in 2011 by the 16 countries that share the Queen as Head of State.
It will mean the order of succession will no longer be based on gender and will allow an elder daughter to precede a younger son as heir to the throne.
The new rule will apply to any children in the line of succession born after 28 October, 2011, including Prince George of Cambridge.
Monarchy New Zealand has welcomed the passing of the Bill saying it cuts out discrimination against women.
Vice chair of Monarchy New Zealand Chloe Oldfield says women should have equal rights in succession to the throne.
She says that principal reflects New Zealand society and its values.
However, deputy chair of the Republican movement, known as Savage, says New Zealanders should choose their own head of state.
He says Catholics remain unable to be king or queen which entrenches discrimination in the head of state which he says is counter to the views of most New Zealanders.