There's an insane amount of different things all of which have different rules for for parents, or under age 25, or over age 65, or single, or getting something from ACC, or has a medical certificate, etc.

Also of course you get people applying policies that are out of date or that some manager decided on their own without consulting anyone.

And then there's the various rules suspensions that happen whenever there's a natural disaster, or a catastrophic IT failure, or an angry government, or a lawsuit.