V okoliščinah, navedenih v pododstavkih (d), (e) in (f) se v največji možni meri uporablja metoda ugotavljanja zanesljivosti. Če naj bi se osebe, za katere ne velja "potreba vedeti", zaposlile v okoliščinah, v katerih bi lahko imele dostop do tajnih podatkov EU (npr. sli, varnostni agenti, vzdrževalno in čistilno osebje itd.), morajo biti najprej ustrezno varnostno preverjene.
In the circumstances outlined in subparagraphs (d), (e) and (f), the fullest practicable use shall be made of the technique of background investigation. When persons not having an established "need to know" are to be employed in circumstances in which they may have access to EU classified information (e.g. messengers, security agents, maintenance personnel and cleaners, etc.), they shall first be appropriately security-cleared.