It is prohibited to possess or operate an over-snow vehicle on National Forest System lands in violation of a restriction or prohibition established pursuant to 36 CFR part 212, subpart C, provided that the following uses are exempted from this section:
(a)
Limited administrative use by the Forest Service;
(b)
Use of any fire, military, emergency, or law enforcement vehicle for emergency purposes;
(c)
Authorized use of any combat or combat support vehicle for national defense purposes;
(d)
Law enforcement response to violations of law, including pursuit;
(e)
Use by over-snow vehicles that is specifically authorized under a written authorization issued under Federal law or regulations; and
(f)
Use of a road or trail that is authorized by a legally documented right-of-way held by a State, county, or other local public road authority.
Code of Federal Regulations
[70 FR 68291, Nov. 9, 2005]