The intent of the rules are quite clear.
Every country in the world is going to have different citizenship laws (some relatively tough like ours, some very lax like Saint Kits and Nevis and for that matter Vanuatu).
So to make sure there is no dodgy stuff going on FIFA correctly made some very clear, very simple, very easy, yes and no answers if you possessed two passports
1: Born there - no
2: Parents born there - no
3: Grandparents born there - no
4: lived there for 5 years since the age of 18 (bitch of a rule for age group players, but a rules a rule - NO, NO, NO
What is so difficult for NZ football to figure out?
lol possibly intent according to Auckland Nix perspective. Plenty of comment here sees a bigger pic.