Related Rule
Ecuador
Practice Relating to Rule 54. Attacks against Objects Indispensable to the Survival of the Civilian Population
Section A. Attacks against objects
Ecuador’s Naval Manual (1989) prohibits the “intentional destruction of food, crops, livestock, drinking water and other objects indispensable to the survival of the civilian population, for the specific purpose of denying the civilian population of their use”. 
Ecuador, Aspectos Importantes del Derecho Internacional Marítimo que Deben Tener Presente los Comandantes de los Buques, Academia de Guerra Naval, 1989, § 8.1.2.