Comes down to 'when in Rome, do as the Romans do'.
I was aware, and made my kids aware, that the schools are a lot hotter on uniform and enforcement of it than they were in NZ, that we might think it was over the top, but that's the way it is, and just as in NZ, if they broke the rules and the school punished them for it, then we'd be backing the school. Certainly when it comes to anything as minor as uniform.
The kids haven't had a problem, and we haven't had a problem.
In reality, we've found that the school is a lot more relaxed about it, than it looks when you're reading their rules and regulations. I see girls wearing what they call a skirt which I'd call a belt, with a face full of slap, nails looking like talons and I'm buggered if I know what they've done to make their shirt look like that.
I'm way stricter than the school lol, I require them to wear school uniform looking like they're school children attending a school, rather than attending a party dressed up in their old school uniform, trying their hardest to pull. . .