A lawyer may communicate the fact that the lawyer does or does not practice in particular fields of law. A lawyer shall not state or imply that the lawyer is a specialist except as follows:
(a) a lawyer admitted to engage in patent practice before the United States Patent and Trademark Office may use the designation "patent attorney" or a substantially similar designation;
(b) a lawyer engaged in admiralty practice may use the designation "admiralty," "proctor in admiralty" or a substantially similar designation; and
(c) a lawyer who has been recognized as a specialist under the Arkansas Plan of Specialization approved by the Arkansas Supreme Court may communicate the fact during the period that he or she is a "Board Recognized Specialist in (insert field in which recognized ) Law" under the plan.