Соответствующая норма
Practice Relating to Rule 20. Advance Warning
Togo’s Military Manual (1996) states: “If the tactical situation allows for it, a timely warning must be given in case of attacks which may affect the civilian population.” 
Togo, Le Droit de la Guerre, III fascicules, Etat-major Général des Forces Armées Togolaises, Ministère de la Défense nationale, 1996, Fascicule III, p. 11; see also Fascicule III, p. 14 and Fascicule II, p. 7.