public agency
(13) “public agency” means the United States, any State of the United States, the District of Columbia, the Commonwealth of Puerto Rico, the Virgin Islands of the United States, Guam, American Samoa, the Trust Territory of the Pacific Islands, the Commonwealth of the Northern Mariana Islands, and any territory or possession of the United States, or any unit of local government, department, agency, or instrumentality of any of the foregoing, and includes (as may be prescribed by regulation hereunder) a legally organized volunteer fire department that is a nonprofit entity and provides services without regard to any particular relationship (such as a subscription) a member of the public may have with such a department; and