It is a willing agreement to a set of values and procedures, and a standard of conduct.
Both of these procedures are arbitrary in their principle, and liable to be erratic in their application.
We perceive then that the fundamental problems of sidereal science are closely linked up with the elementary and indispensable procedures of celestial measurement.
The procedures for accessing the keypads were strict: only those authorized to do so were allowed to, and then only when no one unauthorized was in the room and the door sealed with the alarm activated.
Red-spiderall these and similar procedures timed to ~catch the pest at a vulnerable stage are intelligent and profitable prophylactic measures, as has been repeatedly shown.