text: ____________________________________________________________________________________FM 2-22.3
  ARTICLE 22
  Prisoners of war may be interned only in premises located on land and affording every guarantee
  of hygiene and healthfulness. Except in particular cases which are justified by the interest of the
  prisoners themselves, they shall not be interned in penitentiaries.
  Prisoners of war interned in unhealthy areas, or where the climate is injurious for them, shall be
  removed as soon as possible to a more favorable climate.
  The Detaining Power shall assemble prisoners of war in camps or camp compounds according to
  their nationality, language and customs, provided that such prisoners shall not be separated
  from prisoners of war belonging to the armed forces with which they were serving at the time of
  their capture, except with their consent.
  ARTICLE 23
  No prisoner of war may at any time be sent to or detained in areas where he may be exposed to
  the fire of the combat zone, nor may his presence be used to render certain points or areas
  immune from military operations.
  Prisoners of war shall have shelters against air bombardment and other hazards of war, to the
  same extent as the local civilian population. With the exception of those engaged in the
  protection of their quarters against the aforesaid hazards, they may enter such shelters as soon
  as possible after the giving of the alarm. Any other protective measure taken in favor of the
  population shall also apply to them.
  Detaining Powers shall give the Powers concerned, through the intermediary of the Protecting
  Powers, all useful information regarding the geographical location of prisoner of war camps.
  Whenever military considerations permit, prisoner of war camps shall be indicated in the
  daytime by the letters PW or PG, placed so as to be clearly visible from the air. The Powers
  concerned may, however, agree upon any other system of marking. Only prisoner of war camps
  shall be marked as such.
  ARTICLE 24
  Transit or screening camps of a permanent kind shall be fitted out under conditions similar to
  those described in the present Section, and the prisoners therein shall have the same treatment
  as in other camps.
  CHAPTER II QUARTERS, FOOD AND CLOTHING OF PRISONERS OF
  WAR
  ARTICLE 25
  Prisoners of war shall be quartered under conditions as favorable as those for the forces of the
  Detaining Power who are billeted in the same area. The said conditions shall make allowance for
  the habits and customs of the prisoners and shall in no case be prejudicial to their health.