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Ecuador
Practice Relating to Rule 65. Perfidy
Section E. Simulation of an intention to negotiate under the white flag of truce
Ecuador’s Naval Manual (1989) provides that it is unlawful to use the flag of truce to gain a military advantage over the enemy. It adds: “Misuse of protective signs, signals and symbols … in order to injure, kill, or capture the enemy constitutes an act of perfidy.” 
Ecuador, Aspectos Importantes del Derecho Internacional Marítimo que Deben Tener Presente los Comandantes de los Buques, Academia de Guerra Naval, 1989, § 12.2.