Although a state license is only valid in the issuing state, because of the regional boards a dentist may be able to apply for licensure in any other state within the jurisdiction of their regional board. There are many cooperative agreements between states that allow recognition of another state's license so as to procure a license either via "licensure by credentials" or "licensure by reciprocity." Although a national licensure exam has yet to be made, the American Dental Association (ADA) has worked with education and examining groups to form such an exam.[28]