Apparently there is a time limit set by some one, I don't really know who. You may colonize some native peoples if your country is strong (eg China, Britain). However you must do it within certain unwritten mode and time constraints. Otherwise it will end up like New Zealand.
Captain Cook landed at the Bay of Plenty (Tauranga), planted the Union Jack and claimed this land for the Queen. Even today we have a governor general in Wellington, representing the Queen!
There is a slight difference in this case (from Sarawak). NZ is not considered a colony of Britain. It is one of the commonwealth countries (same as Australia and Canada).
Also during the colonization process, Maori fought the British and won many battles both in the Waikato and elsewhere. Both parties ended the conflict by signing a treaty of peace at Waitangi.
