As of midnight tomorrow (15 March 2020) every person arriving in New Zealand apart from those coming from the Pacific islands will have to self- isolate for 14 days, Prime Minister Jacinda Ardern says. The measures will be reviewed in 16 days and there will be more measures and advice for self isolation next week.
For full transcript see here https://www.rnz.co.nz/news/national/411738/live-everyone-travelling-to-nz-from-overseas-to-self-isolate
Update 17 March 2020
Prime Minister Jacinda Ardern said any tourists that enter New Zealand after 16 March and don't quarantine would be deported.
Health MInister Dr Clark stated "We absolutely are interested in any information on anybody that is looking to flout the arrangements that are in place and we will deport them.
"We make no apology, people who are not going to abide by the way we are doing things are not welcome in New Zealand," he said.
Dr Clark said police were seeking tourists that weren't self-isolating, but wasn't aware if any had been found.