Соответствующая норма
Practice Relating to Rule 106. Conditions for Prisoner-of-War Status
Section C. Situations where combatants cannot distinguish themselves
Ecuador’s Naval Manual (1989) provides that guerrilleros and members of resistance movements are considered combatants if they meet certain requirements, including “wearing a uniform or some form of identification recognizable from a distance [and] carrying arms openly”. 
Ecuador, Aspectos Importantes del Derecho Internacional Marítimo que Deben Tener Presente los Comandantes de los Buques, Academia de Guerra Naval, 1989, § 11.8.