Related Rule
Practice Relating to Rule 65. Perfidy
Section D. Simulation of surrender
Belgium’s Teaching Manual for Officers (1994) prohibits perfidy. For example, “feigning to surrender and then opening fire at the enemy who collects you as ‘prisoner of war’ is an aggravated act of perfidy if the white flag, which is a protective sign, is used”. 
Belgium, Droit de la Guerre, Manuel d’Instruction pour Officiers, Etat-Major Général, Division Opérations, 1994, Part I, Title II, p. 33.
Belgium’s Teaching Manual for Soldiers states: “Using a white flag or feigning surrender in order to attack an adversary is strictly prohibited and constitutes a grave breach of the laws of war.” 
Belgium, Droit de la Guerre, Dossier d’Instruction pour Soldat, à l’attention des officiers instructeurs, JS3, Etat-Major Général, Forces Armées belges, undated, p. 15.