permit

... Whenever military considerations permit, prisoner of war camps shall be indicated in the day-time 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. ...

... A prisoner of war shall be tried only by a military court, unless the existing laws of the Detaining Power expressly permit the civil courts to try a member of the armed forces of the Detaining Power in respect of the particular offence alleged to have been committed by the prisoner of war. ...

... Judicial investigations relating to a prisoner of war shall be conducted as rapidly as circumstances permit and so that his trial shall take place as soon as possible. A prisoner of war shall not be confined while awaiting trial unless a member of the armed forces of the Detaining Power would be so confined if he were accused of a similar offence, or if it is essential to do so in the interests of national security. In no circumstances shall this confinement exceed three months. ...

... The conditions which prisoners of war accommodated in a neutral country must fulfil in order to permit their repatriation shall be fixed, as shall likewise their status, by agreement between the Powers concerned. In general, prisoners of war who have been accommodated in a neutral country, and who belong to the following categories, should be repatriated: ...