What occurs when an agency submits a hit involving the KST file?

When an agency submits a hit involving the KST file, it triggers a notification to the Terrorist Screening Center (TSC). This step is crucial because the KST (Known or Suspected Terrorist) file is specifically designed to identify individuals who may pose a threat to national security. The notification helps ensure that law enforcement and national security agencies are informed about possible threats and allows them to coordinate responses effectively. This communication is vital for maintaining security and responding proactively to situations involving individuals flagged in the KST file.

In contrast, other options do not accurately reflect the procedure associated with KST file hits. Immediate arrest, while a potential outcome in certain scenarios, is not mandated by a hit submission. A further background check may indeed be performed, but it is not the primary or automatic result of submitting a KST file hit. Lastly, it is not appropriate to assume that no action is required in the case of a KST hit since notifying the TSC constitutes a necessary protocol to follow.