Hi,
My current understanding of permanent residence is that there are no travel restrictions and it does not expire. However, I came across this page on NZ immigration website that states:
Does anyone know if this is a mistake or if something has changed?Option C: Apply for a second or subsequent permanent resident visa
Apply within 2 years of your visa expiring and we can grant you travel conditions that will last 2 years from the day your visa expired. You will have the remaining time to return to New Zealand.
You must show us that you are still eligible for the visa and that you have complied with its conditions.
-> Second or subsequent permanent resident visa