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Burundi
Practice Relating to Rule 62. Improper Use of Flags or Military Emblems, Insignia or Uniforms of the Adversary
Burundi’s Regulations on International Humanitarian Law (2007) states that “it is prohibited to use the flags, emblems or uniforms of the adversary … during an engagement in combat action [or] … in order to conceal, be to the advantage of, or prevent, military operations.” 
Burundi, Règlement n° 98 sur le droit international humanitaire, Ministère de la Défense Nationale et des Anciens Combattants, Projet “Moralisation” (BDI/B-05), August 2007, Part I bis, p. 94.
Burundi’s Law on Genocide, Crimes against Humanity and War Crimes (2003) states:
[The following are] considered as war crimes:
B. Other serious violations of the laws and customs applicable in international armed conflicts, within the established framework of international law, namely, any of the following acts:
g) making improper use … of the military insignia and uniform of the enemy … , resulting in death or serious personal injury. 
Burundi, Law on Genocide, Crimes against Humanity and War Crimes, 2003, Article 4(B)(g).
Burundi’s Penal Code (2009) states:
“War crimes” means crimes which are committed as part of a plan or policy or as part of a large-scale commission of such crimes, in particular:
2. … [S]erious violations of the laws and customs applicable in international armed conflict, within the established framework of international law, namely, any of the following acts:
7°. Making improper use … of the flag or of the military insignia and uniform of the enemy … , resulting in death or serious personal injury. 
Burundi, Penal Code, 2009, Article 198(2)(7°).