Русско-англо-русский юридический словарь

In U.S. criminal law, necessity may be either a possible justification or an exculpation for breaking the law. Defendants seeking to rely on this defense argue that they should not be held liable for their actions as a crime because their conduct was necessary to prevent some greater harm and when that conduct is not excused under some other more specific provision of law such as self defense. (Wikipedia)

Necessity: A defense that permits a person to act in a criminal manner when an emergency situation, not of the person's own creation compels the person to act in a criminal manner to avoid greater harm from occurring. (http://nationalparalegal.edu)

At the same time, the funding of the museum sector is subject to reconsideration, and government budget funding is being reduced, which leads to the necessity to seek charitable and sponsor support. (policy brief of the United Nations Educational, Scientific and Cultural Organization)

A war crime is an act that constitutes a serious violation of the laws of war that gives rise to individual criminal responsibility. Examples of war crimes include intentionally killing civilians or prisoners, torturing, destroying civilian property, taking hostages, performing a perfidy, raping, using child soldiers, pillaging, declaring that no quarter will be given, and seriously violating the principles of distinction, proportionality, and military necessity. (Wikipedia)