Related Rule
Germany
Practice Relating to Rule 58. Improper Use of the White Flag of Truce
Germany’s Military Manual (1992) provides: “It is prohibited to make improper use of a flag of truce.” 
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, § 473.
Germany’s Law Introducing the International Crimes Code (2002) punishes anyone who, in connection with an international or a non-international armed conflict, “makes improper use … of the flag of truce … thereby causing a person’s death or serious injury”. 
Germany, Law Introducing the International Crimes Code, 2002, Article 1, § 10(2).