Division 17 Secured Areas protected against eavesdropping shall be designated technically Secured Areas. The following additional requirements shall apply:

such areas shall be IDS equipped, be locked when not occupied and be guarded when occupied. Any keys shall be controlled in accordance with Section VI;

all persons and material entering such areas shall be controlled;

such areas shall be regularly physically and/or technically inspected as required by the competent security authority. Such inspections shall also be conducted following any unauthorised entry or suspicion of such entry; and

such areas shall be free of unauthorised communication lines, unauthorised telephones or other unauthorised communication devices and electrical or electronic equipment.