material

... (b) Industries connected with the production or the extraction of raw materials, and manufacturing industries, with the exception of metallurgical, machinery and chemical industries; public works and building operations which have no military character or purpose; ...

... Prisoners of war shall be allowed to receive by post or by any other means individual parcels or collective shipments containing, in particular, foodstuffs, clothing, medical supplies and articles of a religious, educational or recreational character which may meet their needs, including books, devotional articles, scientific equipment, examination papers, musical instruments, sports outfits and materials allowing prisoners of war to pursue their studies or their cultural activities. ...

... 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.). ...

... Subject to the measures which the Detaining Powers may consider essential to ensure their security or to meet any other reasonable need, the representatives of religious organizations, relief societies, or any other organization assisting prisoners of war, shall receive from the said Powers, for themselves and their duly accredited agents, all necessary facilities for visiting the prisoners, distributing relief supplies and material, from any source, intended for religious, educational or recreative purposes, and for assisting them in organizing their leisure time within the camps. Such societies or organizations may be constituted in the territory of the Detaining Power or in any other country, or they may have an international character. ...

... As soon as relief supplies or material intended for the above-mentioned purposes are handed over to prisoners of war, or very shortly afterwards, receipts for each consignment, signed by the prisoners' representative, shall be forwarded to the relief society or organization making the shipment. At the same time, receipts for these consignments shall be supplied by the administrative authorities responsible for guarding the prisoners. ...