text: Chapter 4
  4-32. The display of the distinctive emblem is under the direction of the competent military or civilian
  authority (GWS art. 39; GWS Sea art. 41; consider AP I art. 18 and AP II art. 12). The distinctive emblem
  may be removed by competent authority for camouflage integrity or other tactical reasons. The fact that
  medical personnel, land facilities, units, or transports are not displaying the distinctive emblem does not
  entitle an opposing force to attack them if their status is apparent or otherwise has been established. They
  retain their protections as long as their mission and use is consistent with their protected status. However, the
  absence of the distinctive emblem may increase the risk that enemy forces will not recognize the protected
  status of military medical and religious personnel and other protected persons and objects, and attack them
  in error (see DOD Law of War Manual, 7.15.3.1).
  DISPLAY BY PERSONNEL
  4-33. Personnel entitled to wear the distinctive emblem, when authorized by competent authority, include:
  * Military medical personnel and chaplains (GWS art. 39, 40; GWS Sea art. 41, 42; consider AP I,
  Amended Annex I, art. 5(4));
  * Auxiliary medical personnel, while carrying out their medical duties (GWS art. 41);
  * Members and medical staff of the Red Cross Movement; that is, official representatives of the
  ICRC, the International Federation of Red Cross and Red Crescent Societies, and national Red
  Cross societies in accordance with the GWS (see GWS art. 44);
  * Staff of recognized aid societies of neutral countries (see GWS art. 27); and
  * Staff of national societies or other voluntary aid societies, auxiliary to, or assisting, the military
  medical services in accordance with the GWS (see GWS art. 26).
  4-34. Wearing of the Red Cross armlet by U.S. military medical personnel is subject to service authorization
  and may be limited by tactical conditions. The emblem does not in itself confer protected status, but it
  facilitates the identification of protected objects and persons (DOD Law of War Manual, 7.15.3.2). When
  authorized, such military medical personnel, staff of national Red Cross societies, and staff of recognized aid
  societies of neutral countries, may wear on the left arm an armlet displaying the appropriate distinctive
  emblem and issued and stamped by competent military authority (see GWS art. 40). Such personnel are
  required to bear an identity card that states in what capacity its possessor is entitled to protection under the
  GWS and that is embossed with the stamp of the military authority (see GC art. 40). Auxiliary medical
  personnel require similar authorization to wear an armlet in a similar manner and carry similar identification,
  but such armlets are to bear a smaller distinctive emblem (see GWS art. 41).
  DISPLAY BY MEDICAL UNITS AND ESTABLISHMENTS
  4-35. The GWS provides for military medical units, both fixed and mobile, and military medical
  establishments of parties to a conflict to display the distinctive emblem when they are entitled to protection
  under the GWS, subject to authorization by competent military authority (see GWS art. 42). The GWS also
  provides for such display by medical units belonging to neutral countries, when authorized to lend their
  services to a belligerent (see GWS arts. 27, 43).
  DISPLAY BY MILITARY MEDICAL AIRCRAFT
  4-36. The GWS and GWS Sea require that military medical aircraft (those aircraft exclusively employed for
  the removal of the wounded, sick, and shipwrecked, and for the transport of medical personnel and
  equipment), shall bear the distinctive emblem, together with their national insignia, on their lower, upper and
  lateral surfaces (see GWS art. 36; GWS Sea art. 39).
  MANDATORY REMOVAL OF DISTINCTIVE EMBLEM FROM VEHICLES AND AIRCRAFT
  4-37. Ground transport or aircraft no longer exclusively employed for medical work related to its former
  protected status should no longer bear the distinctive emblem.
  4-38. If ground transport or aircraft is used temporarily for medical transport work, such ground transport or
  aircraft should bear the distinctive emblem only while on the medical mission and will be entitled to
  protection of the Conventions only for its duration. If the vehicle or aircraft is to be used for tactical purposes,