NAICS was developed specifically for the collection and publication of statistical data to show the economic status of the United States.
The NAICS categories and definitions were not developed to meet the needs of procurement and/or regulatory applications.
However, other federal agencies trade associations, and regulation boards have adopted NAICS to use for procurement and regulatory purposes even though it does not entirely fit their specific needs.
The U.S. Census Bureau has no formal role as an arbitrator of statistical classification. For questions regarding other agencies’ use of the NAICS system, contact the specific agency. For access to a list of Federal government agencies, visit this site.