This happened with the National Parks back in the 90’s. I didn’t realize Assateague was part of it though. Guess they included National Seashores as well. And, if I remember correctly, it is by treaty, not law, so it supercedes any laws.
Come to think of it, if it involves the National Parks, it does include Assateague as it is considered a national Park.......at least it does when it comes to the annual pass, which is good at all National Parks.
That reminds me, I need to renew mine. I’ll get my new one Wednesday, we’ll beover there anyway for the seafood festival :)