Admissions to and discharges from any Alabama state veterans' home shall be in accordance with the policies and procedures as established by the State Board of Veterans' Affairs at the time application for admission or for discharge is presented; provided, however, that the State Board of Veterans' Affairs may admit and discharge veterans to any Alabama veterans' home who qualify for care and treatment under Title 38, U.S.C., Section 101 (19) and Section 641, and may adopt appropriate rules consistent with accepted medical considerations to carry out this function.