F. The use of force in armed conflict (32) In armed conflict, what constitutes an ‘arbitrary’ deprivation of life during the conduct of hostilities is to be determined by reference to international humanitarian law. This law does not prohibit the use of force in hostilities against lawful targets (for example combatants or civilians directly participating in hostilities) if necessary from a military perspective, provided that, in all circumstances, the rules of distinction, proportionality and precaution in attack are observed. Any violation of international humanitarian law resulting in death, including war crimes, will be an arbitrary deprivation of life. (33) International humanitarian law on the conduct of hostilities must only be applied during an armed conflict and where the use of force is part of the armed conflict. In all other situations of violence, including internal disturbances, tensions or riots, international human rights rules governing law enforcement operations apply. (34) Where military necessity does not require parties to an armed conflict to use lethal force in achieving a legitimate military objective against otherwise lawful targets, but allows the target for example to be captured rather than killed, the respect for the right to life can be best ensured by pursuing this option. (35) The use during hostilities of new weapons technologies such as remote controlled aircraft should only be envisaged if they strengthen the protection of the right to life of those affected. Any machine autonomy in the selection of human targets or the use of force should be subject to meaningful human control. The use of such new technologies should follow the established rules of international law. G. State obligations with respect to persons held in custody (36) When the State deprives an individual of liberty, its control of the situation yields a heightened level of responsibility to protect that individual’s rights. This includes a positive obligation to protect all detained persons from violence or from emergencies 15