Соответствующая норма
Practice Relating to Rule 125. Correspondence of Persons Deprived of Their Liberty
Poland’s Prisoner of War Handling Procedures (2009) states: “Within seven days of arrival at the prisoner-of-war camp or hospital, prisoners shall be permitted to write a letter to their families, in order to inform them of their address and state of health … These letters … shall be dispatched as soon as possible.” 
Poland, Norma Obronna NO-02-A020:2000, Procedury postępowania z jeńcami wojennymi, enacted by decision No. 134/MON related to the Approval and Enforcement of Regulatory Instruments in Respect of State Defence and Security, 21 April 2009, published in the Official Gazette of the Ministry of National Defence, No. 8, Item 99, April 2009, Section 2.3.3.