New Zealand Prime Minister Bill English has called Australia's immigration changes "disappointing", saying they will force New Zealanders to wait longer for citizenship.
Mr English said there had been no formal contact between the Turnbull Government and himself or his ministers before Australia unveiled its immigration crackdown last week.
"The officials are going through a process of understanding exactly what the decision is. It was one that appeared on pretty short notice with very rapid application so we want to make sure that all the implications are understood," he said in New Zealand on Monday.
"But on the face of it, it's disappointing that New Zealanders would have to wait longer."
The changes require New Zealanders and others seeking Australian citizenship to be permanent residents for four years before being eligible, up from one year.
Migrants will also face a tougher citizenship test which will assess their commitment to Australia and their attitudes to religious freedom and gender equality.
