Control: The organisation employs a technical surveillance countermeasures survey at [Assignment: organisation-defined locations] [Selection (one or more): [Assignment: organisation-defined frequency]; [Assignment: organisation-defined events or indicators occur]].
Technical Surveillance Countermeasures Survey Supplemental Guidance:
Technical surveillance countermeasures surveys are performed by qualified personnel to detect the presence of technical surveillance devices/hazards and to identify technical security weaknesses that could aid in the conduct of technical penetrations of surveyed facilities. Such surveys provide evaluations of the technical security postures of organisations and facilities and typically include thorough visual, electronic, and physical examinations in and about surveyed facilities. The surveys also provide useful input into risk assessments and organisational exposure to potential adversaries.