How well do you get on with him? If you have a good working relationship, I would in the first instance ask him (in person, not by e-mail, as it's easier to convey tone and make it a freindly enquiry, not an accusation)
If that isn't possible, or if you don't feel he would react well, then an e-mail along the lines Joy suggests -
"I hadn't realised that County needed that kind of detail - is this a new thing? Can you calirify whether it is mandatory to provide this information,and if so, why?"