Related Rule
Germany
Practice relating to Rule 66. Non-Hostile Contacts between the Parties to the Conflict
Section B. Use of the white flag of truce
Germany’s Soldiers’ Manual (1991) recognizes the white flag as the flag of parlementaires and the flag of surrendering combatants. 
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. 6.
Germany’s Military Manual (1992) states that parlementaires “make themselves known by a white flag”. 
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, § 223, see also Appendix 1/2.
Germany’s IHL Manual (1996) recognizes the white flag as the flag of parlementaires. 
Germany, ZDv 15/1, Humanitäres Völkerrecht in bewaffneten Konflikten – Grundsätze, DSK VV230120023, Bundesministerium der Verteidigung, June 1996, Appendix 1/2, No. 11.
Germany’s Soldiers’ Manual (2006) recognizes the white flag as the flag of parlementaires and the flag of surrendering combatants. 
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. 6.