From USAJOBS Help
Qualifying educational institutions/programs include: a high school/GED whose curriculum has been approved by a state or local governing body, or a home-school curriculum; and any accredited technical or vocational school, 2- or 4-year college or university, a graduate or professional school, or a post-secondary home-school curriculum.
A post-secondary certificate program must have been completed at a qualifying educational institution equivalent to at least 1 academic year of full-time study that is part of an accredited college-level, technical, trade, vocational, or business school curriculum.
Education completed outside of the United States must be deemed equivalent to that gained in conventional/accredited U.S. education programs to be acceptable for Federal employment. If you received a degree abroad, contact the agency to which you are applying for guidance regarding having your degree reviewed by a U.S.-based credential evaluation service.