A student may appeal the vice president's decision imposing a required medical leave of absence to the medical leave of absence review board (review board). The appeal must be filed in writing with the vice president of student services within twenty days of service of the vice president's decision. Service of the vice president's decision shall be complete upon deposit in the United States mail to the student, postage prepaid and properly addressed to the student at the last known address on file with the registrar's office, or by personal service on the student.