Don't know if this helps but most states now have all their statutes on a searchable database where you can search "photographer" and other similar words and phrases. I have done this several times looking for any bans on photography that the police keep referring to (I've yet to find any that actually exist around here.) Some states may license occupations and those agencies have their own administrative codes, so you need to search those as well. Don't forget county and municipal ordinances where you live/work. There are also court rulings that could effect you. It can get pretty complicated!

Doug