Public agency means -
(1) A state, the Commonwealth of Puerto Rico, the Virgin Islands, American Samoa, the Trust Territory of the Pacific Islands, the Government of the Northern Marianas, Guam, or any agency of those entities;
(2) A municipality or other political subdivision;
(3) A tax-supported organization; or
(4) An Indian tribe or pueblo.
14 CFR § 152.3
The following are definitions of terms used throughout this part: