FIPS 199 (Standards for Security Categorization of Federal Information and Information Systems) defines three impact levels — Low, Moderate, High — based on the potential impact of a security breach on confidentiality, integrity, and availability. The categorization determines which NIST 800-53 controls must be applied.
is a regulation concept federal contractors and grant writers run into across solicitations, regulations, and award filings
FIPS 199 is part of the federal regulatory framework that governs procurement, performance, or compliance. For contractors, FIPS 199 is not just background — it shapes solicitation language, evaluation criteria, source-selection authority, and what counts as compliant performance. Understanding when FIPS 199 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 FIPS 199 as common vocabulary, so reading their decisions, modifications, and source-selection memoranda gets easier when the regulation is in your working memory. Pair FIPS 199 with the related terms above to see how it interacts with adjacent regulatory mechanisms.
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