What defines a service-disabled veteran-owned small business (SDVOSB)?

The Small Business Act defines an SDVOSB as a business that is (1) at least 51% owned directly and unconditionally by a service-disabled veteran and (2) managed and controlled by a service-disabled veteran, or spouse or permanent caregiver of a service-disabled veteran with a permanent and severe disability. (See 13 C.F.R. 125.8-125.10).