internment

... 1. Persons belonging, or having belonged, to the armed forces of the occupied country, if the occupying Power considers it necessary by reason of such allegiance to intern them, even though it has originally liberated them while hostilities were going on outside the territory it occupies, in particular where such persons have made an unsuccessful attempt to rejoin the armed forces to which they belong and which are engaged in combat, or where they fail to comply with a summons made to them with a view to internment. ...

... The Detaining Power may subject prisoners of war to internment. It may impose on them the obligation of not leaving, beyond certain limits, the camp where they are interned, or if the said camp is fenced in, of not going outside its perimeter. Subject to the provisions of the present Convention relative to penal and disciplinary sanctions, prisoners of war may not be held in close confinement except where necessary to safeguard their health and then only during the continuation of the circumstances which make such confinement necessary. ...

... 2. Place of internment or confinement; ...

... Throughout the duration of hostilities, Parties to the conflict shall endeavour, with the cooperation of the neutral Powers concerned, to make arrangements for the accommodation in neutral countries of the sick and wounded prisoners of war referred to in the second paragraph of the following Article. They may, in addition, conclude agreements with a view to the direct repatriation or internment in a neutral country of able-bodied prisoners of war who have undergone a long period of captivity. ...

... Representatives or delegates of the Protecting Powers shall have permission to go to all places where prisoners of war may be, particularly to places of internment, imprisonment and labour, and shall have access to all premises occupied by prisoners of war; they shall also be allowed to go to the places of departure, passage and arrival of prisoners who are being transferred. They shall be able to interview the prisoners, and in particular the prisoners' representatives, without witnesses, either personally or through an interpreter. ...