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two-person rules stresses
sec.sys.	правило "двух лиц"; правило выполнения операции напр. принятия решения о доступе двумя лицами, действующими согласованно (при разделении функций между ними)
English thesaurus
two-person rule
USA	A system designed to prohibit access by an individual to nuclear weapons and certain designated components by requiring the presence at all times of at least two authorized persons, each capable of detecting incorrect or unauthorized procedures with respect to the task to be performed