Mary will need to be registered in the other state she wants to work with.
Explanation:
Some professionals have professions that need to be registered in the professional's state of operation so that he or she is able to practice their profession. This is the case with Mary's profession that is registered in her state and that state restricts the use of the title "Certified Interior Designer". Mary is only entitled to practice in the state in which she is registered, so if a client has contacted Mary to work in another state, she must apply for registration in that state.
