43 CFR § 8223.0-5
Definitions
June 11, 2020
(a) Research natural area means an area that is established and maintained for the primary purpose of research and education because the land has one or more of the following characteristics:
(1) A typical representation of a common plant or animal association;
(2) An unusual plant or animal association;
(3) A threatened or endangered plant or animal species;
(4) A typical representation of common geologic, soil, or water features; or
(5) Outstanding or unusual geologic, soil, or water features.
(b) [Reserved]