Related Rule
Israel
Practice Relating to Rule 54. Attacks against Objects Indispensable to the Survival of the Civilian Population
Section B. Attacks against objects used to sustain or support the adverse party
Israel’s Manual on the Laws of War (1998) states:
It is allowed, of course, to attack the enemy army’s means of support or targets forming the foundation for the direct support of the enemy army, provided that the attack does not leave the civilian population with insufficient means to ward off its starvation. 
Israel, Laws of War in the Battlefield, Manual, Military Advocate General Headquarters, Military School, 1998, p. 35.
Israel’s Manual on the Rules of Warfare (2006) states:
It is permissible, of course, to attack the sustenance provisions of the enemy’s army or infrastructure targets directly supporting the enemy’s army, providing the attack does not leave the civilian population without enough food. 
Israel, Rules of Warfare on the Battlefield, Military Advocate-General’s Corps Command, IDF School of Military Law, Second Edition, 2006, p. 25.
The Manual on the Rules of Warfare (2006) is a second edition of the Manual on the Laws of War (1998).