HUBZone certification is for small businesses with a principal office located in a designated Historically Underutilized Business Zone, and at least 35 percent of employees living in one too. It is the one certification tied entirely to geography and staffing rather than ownership, and it can drift out of compliance as you hire, even if nothing about your ownership changes. Certified firms get access to HUBZone set-asides and a price evaluation preference in some open competitions.

In a sentence

"This requirement is a total HUBZone set-aside under NAICS 561210." Only firms SBA has certified as HUBZone may bid, and certification depends on your office address and your employees' addresses, not on anything you do day to day.