Two-person integrity (TPI) in SCI requires what?

• A. Two authorized individuals must participate in handling/approving certain SCI actions or SAP-related tasks.
• B. Two non-authorized individuals must participate in all actions.
• C. Two authorized individuals must not communicate about SCI.
• D. Two authorized individuals must be present to supervise but do not participate.

Answer: (A)

Two-person integrity requires that two authorized individuals actively participate in handling or approving actions related to SCI or SAP tasks. This dual participation ensures accountability and prevents a single person from handling sensitive material alone, reducing the risk of misuse or mistakes. The correct choice captures this by stating that two authorized individuals must participate in handling or approving SCI actions or SAP-related tasks. The other options don’t fit because involving non-authorized personnel is not allowed, supervision without participation does not meet the dual-control requirement, and requiring no communication would undermine the coordination that dual control relies on.