"The principle is simple: it is still required to follow the official dress-code, but elegant minor deviations (that may, in particular, include appropriate jeans matching the jacket) are allowed."
"They were saying that jeans were generally not allowed. If it's generally not allowed, that must mean that there must be exceptions. And if I, with a decent attempt at an outfit apart from that, didn't meet that exception, I don't see what would, frankly."