It is based on Council security policy and risk assessment, or imposed by parameters covering the operational environment, the lowest level of personnel security clearance, the highest classification of information handled, the security mode of operation or user requirements.
Podlago ima v varnostni politiki Sveta in v ocenah tveganj ali v parametrih, ki se določajo glede na okolje delovanja, najnižjo stopnjo preverjene varnostne zanesljivosti osebja, najvišjo stopnjo tajnosti obdelovanih podatkov, način delovanja z varovanjem tajnosti ali zahteve uporabnikov.