Type 1. A primitive area which by its size or location is in effect untouched by urban civilization, and can offer the experience of solitude and self-reliance. Since lands at the higher elevations are important for protection of watersheds, are ecologically vulnerable if unwisely altered by human interference, and may be uneconomic for logging or construction, they may be suitable for this classification.
Type 2. A unit of importance for all the natural sciences, especially ecology, and with outstanding value for education, research, and appreciation of natural processes. Preservation in the desired natural condition is the prevailing purpose of these holdings. Visitation shall be regulated to ensure this preservation on a permanent basis.
Type 3. An area which is not of ecological or primitive stature, but which has the appearance of being in an untouched natural state or is capable of attaining that appearance if held and managed for this purpose.
Md. Code, NR § 5-1201