Article 21

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.

Prisoners of war may be partially or wholly released on parole or promise, in so far as is allowed by the laws of the Power on which they depend. Such measures shall be taken particularly in cases where this may contribute to the improvement of their state of health. No prisoner of war shall be compelled to accept liberty on parole or promise.

Upon the outbreak of hostilities, each Party to the conflict shall notify the adverse Party of the laws and regulations allowing or forbidding its own nationals to accept liberty on parole or promise. Prisoners of war who are paroled or who have given their promise in conformity with the laws and regulations so notified, are bound on their personal honour scrupulously to fulfil, both towards the Power on which they depend and towards the Power which has captured them, the engagements of their paroles or promises. In such cases, the Power on which they depend is bound neither to require nor to accept from them any service incompatible with the parole or promise given.