Related Rule
Germany
Practice Relating to Rule 146. Reprisals against Protected Persons
Section A. Captured combatants and prisoners of war
Germany’s Soldiers’ Manual (1991) states: “Reprisals against prisoners of war are forbidden.” 
Germany, Taschenkarte, Humanitäres Völkerrecht in bewaffneten Konflikten – Grundsätze, Bearbeitet nach ZDv 15/2, Humanitäres Völkerrecht in bewaffneten Konflikten – Handbuch, Zentrum Innere Führung, June 1991, p. 7.
Germany’s Military Manual (1992), referring to Article 13 of the 1949 Geneva Convention III, provides: “It is expressly prohibited by agreement to make reprisals against: … prisoners of war (Art. 13 para 3 [of the 1949 Geneva Convention III])”. 
Germany, Humanitarian Law in Armed Conflicts – Manual, DSK VV207320067, edited by The Federal Ministry of Defence of the Federal Republic of Germany, VR II 3, August 1992, English translation of ZDv 15/2, Humanitäres Völkerrecht in bewaffneten KonfliktenHandbuch, August 1992, § 479.
In the part dealing with the protection of prisoners of war, and under a provision entitled “Fundamental rules for the treatment of prisoners of war”, the manual refers to Article 13 of the 1949 Geneva Convention III and provides: “Reprisals against prisoners of war are prohibited.” 
Germany, Humanitarian Law in Armed Conflicts – Manual, DSK VV207320067, edited by The Federal Ministry of Defence of the Federal Republic of Germany, VR II 3, August 1992, English translation of ZDv 15/2, Humanitäres Völkerrecht in bewaffneten KonfliktenHandbuch, August 1992, § 704.
Germany’s IHL Manual (1996) provides: “Reprisals are expressly prohibited against … prisoners of war”. 
Germany, ZDv 15/1, Humanitäres Völkerrecht in bewaffneten Konflikten – Grundsätze, DSK VV230120023, Bundesministerium der Verteidigung, June 1996, § 320.
Germany’s Soldiers’ Manual (2006) states: “Reprisals against prisoners of war are prohibited.” 
Germany, Druckschrift Einsatz Nr. 03, Humanitäres Völkerrecht in bewaffneten Konflikten – Grundsätze, Erarbeitet nach ZDv 15/2, Humanitäres Völkerrecht in bewaffneten Konflikten – Handbuch, DSK SF009320187, Bundesministerium der Verteidigung, R II 3, August 2006, p. 7.