text: ____________________________________________________________________________________FM 2-22.3
  Such transport may also be used to convey:
  (a) Correspondence, lists and reports exchanged between the Central Information Agency
  referred to in Article 123 and the National Bureau referred to in Article 122;
  (b) Correspondence and reports relating to prisoners of war which the Protecting Powers, the
  International Committee of the Red Cross or any other body assisting the prisoners, exchange
  either with their own delegates or with the Parties to the conflict.
  These provisions in no way detract from the right of any Party to the conflict to arrange other
  means of transport, if it should so prefer, nor preclude the granting of safe-conducts, under
  mutually agreed conditions, to such means of transport.
  In the absence of special agreements, the costs occasioned by the use of such means of transport
  shall be borne proportionally by the Parties to the conflict whose nationals are benefited thereby.
  ARTICLE 76
  The censoring of correspondence addressed to prisoners of war or dispatched by them shall be
  done as quickly as possible. Mail shall be censored only by the dispatching State and the
  receiving State, and once only by each.
  The examination of consignments intended for prisoners of war shall not be carried out under
  conditions that will expose the goods contained in them to deterioration; except in the case of
  written or printed matter, it shall be done in the presence of the addressee, or of a fellow-
  prisoner duly delegated by him. The delivery to prisoners of individual or collective consignments
  shall not be delayed under the pretext of difficulties of censorship.
  Any prohibition of correspondence ordered by Parties to the conflict, either for military or
  political reasons, shall be only temporary and its duration shall be as short as possible.
  ARTICLE 77
  The Detaining Powers shall provide all facilities for the transmission, through the Protecting
  Power or the Central Prisoners of War Agency provided for in Article 123, of instruments, papers
  or documents intended for prisoners of war or dispatched by them, especially powers of attorney
  and wills.
  In all cases they shall facilitate the preparation and execution of such documents on behalf of
  prisoners of war; in particular, they shall allow them to consult a lawyer and shall take what
  measures are necessary for the authentication of their signatures.