text: FM 2-22.3 ____________________________________________________________________________________
  Prisoners shall have opportunities for taking physical exercise, including sports and games, and
  for being out of doors. Sufficient open spaces shall be provided for this purpose in all camps.
  CHAPTER VI DISCIPLINE
  ARTICLE 39
  Every prisoner of war camp shall be put under the immediate authority of a responsible
  commissioned officer belonging to the regular armed forces of the Detaining Power. Such officer
  shall have in his possession a copy of the present Convention; he shall ensure that its provisions
  are known to the camp staff and the guard and shall be responsible, under the direction of his
  government, for its application.
  Prisoners of war, with the exception of officers, must salute and show to all officers of the
  Detaining Power the external marks of respect provided for by the regulations applying in their
  own forces.
  Officer prisoners of war are bound to salute only officers of a higher rank of the Detaining Power;
  they must, however, salute the camp commander regardless of his rank.
  ARTICLE 40
  The wearing of badges of rank and nationality, as well as of decorations, shall be permitted.
  ARTICLE 41
  In every camp the text of the present Convention and its Annexes and the contents of any special
  agreement provided for in Article 6, shall be posted, in the prisoners' own language, at places
  where all may read them. Copies shall be supplied, on request, to the prisoners who cannot have
  access to the copy which has been posted.
  Regulations, orders, notices and publications of every kind relating to the conduct of prisoners of
  war shall be issued to them in a language which they understand. Such regulations, orders and
  publications shall be posted in the manner described above and copies shall be handed to the
  prisoners' representative. Every order and command addressed to prisoners of war individually
  must likewise be given in a language which they understand.
  ARTICLE 42
  The use of weapons against prisoners of war, especially against those who are escaping or
  attempting to escape, shall constitute an extreme measure, which shall always be preceded by
  warnings appropriate to the circumstances.
  CHAPTER VII RANK OF PRISONERS OF WAR
  ARTICLE 43
  Upon the outbreak of hostilities, the Parties to the conflict shall communicate to one another the
  titles and ranks of all the persons mentioned in Article 4 of the present Convention, in order to
  ensure equality of treatment between prisoners of equivalent rank. Titles and ranks which are
  subsequently created shall form the subject of similar communications.