Employer
Employer means, in addition to individuals (including self-employed persons) and organizations engaged in a trade or business, other entities exempt from income tax such as religious, charitable, and educational institutions, the governments of the United States, the individual States, Puerto Rico, the Virgin Islands, Guam, American Samoa, the Northern Mariana Islands, and the District of Columbia, and the agencies, instrumentalities, and political subdivisions of these governments.
Source
42 CFR § 411.101
Scoping language
As used in this subpart and in subparts F through H of this part -