The Green Party says new legislation before the Rugby World Cup giving the SIS more powers is unnecessary.
The New Zealand Security Intelligence Service Amendment Bill was passed by Parliament on Tuesday night, allowing the SIS to monitor and intercept cellphone calls, texts and emails.
Attorney General Chris Finlayson says the new powers will be in place before New Zealand hosts the Rugby World Cup.
Green MP Keith Locke says he does not expect the SIS will play any part in the tournament's security.
He says the bill is unnecessary because New Zealand does not have any enemies.