In some parts of the country, it is illegal to move firewood of any kind. In other places, only some types of wood are legally restricted. And in other places, there are no rules at all. It is confusing, of course.
This brings me to a recent question I got from Carmen, a visitor to this site. The place names on this email have been slightly changed to make it anonymous.
Dear Don't Move Firewood,
I run a maintenance dept at Smith Center, a facility in Woodbridge NJ. I have a contractor cutting down trees and I'm not sure if the tree trunks can be moved from the facility by others to burn. We were in the quarantine zone at one time, but not sure if the quarantine zone is still viable. Thank You for your help.
By far the easiest and fastest way to get an answer to this kind of question is to look up your local State Plant Health Director and call them up. Visit this map of all 50 states to figure out who to call. They'll either have the answer on hand, or be able to tell you where to go next.
If you know that a certain pest is a particular issue in your area, you can also search around on emeraldashborer.info (for emerald ash borer) or beetlebusters.info (for Asian longhorned beetle). Those sites are also very helpful.