Definitions.

(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]