On the laws and regulations section, I'm not sure how you plan to change the USA section. It would seem to me that there should be both an FDA (national) section and a State/Local section. The national and local governments frequently have different regulations going on and it might help to keep them separated.
Yup, I thought about this and still don't know the right answer.
I think it can be dealt with using prefixes, but the danger there is that the FDA stuff drops off the page if there's mucho state/town action.