freedom

... No derogation from the preceding provisions shall be made by special agreements between Powers one of which is restricted, even temporarily, in its freedom to negotiate with the other Power or its allies by reason of military events, more particularly where the whole, or a substantial part, of the territory of the said Power is occupied. ...

... Prisoners' representatives may appoint from amongst the prisoners such assistants as they may require. All material facilities shall be granted them, particularly a certain freedom of movement necessary for the accomplishment of their duties (inspection of labour detachments, receipt of supplies, etc.). ...