NIST SP 800-171 establishes 110 security requirements for protecting Controlled Unclassified Information (CUI) in non-federal systems. Required by DFARS 252.204-7012. Basis for CMMC Level 2.
is a regulation concept federal contractors and grant writers run into across solicitations, regulations, and award filings
NIST SP 800-171 is part of the federal regulatory framework that governs procurement, performance, or compliance. For contractors, NIST SP 800-171 is not just background — it shapes solicitation language, evaluation criteria, source-selection authority, and what counts as compliant performance. Understanding when NIST SP 800-171 applies and (more importantly) when it doesn't apply is the difference between a proposal that's competitive within its actual constraint set and one that over-engineers compliance. Contracting officers use NIST SP 800-171 as common vocabulary, so reading their decisions, modifications, and source-selection memoranda gets easier when the regulation is in your working memory. Pair NIST SP 800-171 with the related terms above to see how it interacts with adjacent regulatory mechanisms.
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