Any device or material designed, constructed or adapted to kill or injure and which functions unexpectedly when a person disturbs or approaches an apparently harmless objects or performs an apparently safe act. Booby-traps also include manually-emplaced devices designed to kill, injure or damage and which are actuated by remote control or automatically after a lapse of time. Their use is prohibited by precise rules.
ROGERS Anthony P.V., “Mines, Booby-Traps and other Devices”, in IRRC, No. 279, November-December 1990, pp. 521-534.