Jag kan inte hitta något om det så mitt påstående var nog felaktigt. Däremot står det såhär:

"When youÂ’re here

you must not take up permanent employment (unless you apply for and are granted an ordinary work visa while youÂ’re here)

[*] you can enrol in one or more courses of training or study of up to three monthsÂ’ duration in total during your visit." - http://www.immigration.govt.nz/migrant/stream/work/workingholiday/sweden...

Hittade också detta!

"If you are in New Zealand on a working holiday visa and you are able to show you have undertaken three months or more of seasonal work in the horticulture and viticulture industries during your working holiday, you may apply for the Working Holidaymaker Extension Visa." - http://www.immigration.govt.nz/migrant/stream/work/hortandvit/workinghol...

Ber om ursäkt för det lösa påståendet tidigare.
Mvh, Nate