Interned belligerents and wounded cared for by neutrals - Art. 53.
Art. 53. A neutral State which receives on its territory troops belonging to the belligerent armies shall intern them, as far as possible, at a distance from the theatre of war.
It may keep them in camps and even confine them in fortresses or in places set apart for this purpose.
It shall decide whether officers can be left at liberty on giving their parole not to leave the neutral territory without permission.