Funny usually PA is the one behind the times, but we went to 3 several years ago. Does get a little tricky when I fish the Ohio RIver. Main stem is governed by WV so I can use unlimited. If I go up a tributary on the Ohio side it is 2 and if I venture into PA then I can have 3. I sometimes have to think about where I am at especially when I am on the New Cumberland pool, as I can end up in all 3 states. Being a PA resident this makes me have license in all 3 states too.