Norma relacionada
United Kingdom of Great Britain and Northern Ireland
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
The UK LOAC Manual (2004) states:
Military action may only be taken for the purpose of attacking, destroying, removing or rendering useless “foodstuffs, agricultural areas for the production of foodstuffs, crops, livestock, drinking water installations and supplies and irrigation works” if they are used by an adverse party:
a. “as sustenance solely for the members of its armed forces”; or
b. “if not as sustenance, then in direct support of military action”.
In the latter case, no action may be taken against these objects if it “may be expected to leave the civilian population with such inadequate food or water as to cause its starvation or force its movement”. 
United Kingdom, The Manual of the Law of Armed Conflict, Ministry of Defence, 1 July 2004, § 5.19.