What investigation replaced the National Agency Check with Inquiries (NACI)?

The Tier 1 Investigation replaced the National Agency Check with Inquiries (NACI) as part of the updated security clearance process. The Tier 1 Investigation is designed to assess individuals for positions of moderate risk to national security, ensuring that they meet the necessary standards for trustworthiness and reliability.

This change reflects a shift towards a more standardized and comprehensive approach to personnel security, incorporating modernized methods of assessment while addressing the evolving risks associated with security clearances. The Tier 1 Investigation includes a review of criminal history, credit checks, and interviews with the candidate and references, making it a robust evaluation tool for safeguarding sensitive information and national interests.

In contrast, the other options listed do not represent the direct replacement for the NACI but instead suggest variations or different levels of background checks that serve specific purposes or risk levels within the personnel security framework.