Ten people have been fined after travelling to New Zealand without proof they tested negative for Covid-19.
Customs said more than 23,000 people - or 99.5 per cent of travellers - had complied with the requirement introduced in January.
About 800 people have been exempt.
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The rule does not apply to children younger than 2, some diplomats, some air crew, and travellers from Australia, Antarctica and most Pacific Islands.
Forty-five people were given warnings because they could not prove they were exempt, or had a negative test result before travelling.
Of the 10 people fined, four have paid.
The maximum fine is $1000.