36 CFR §212.80

1. (a)Purpose. This subpart provides for a system of National Forest System roads, National Forest System trails, and areas on National Forest System lands that are designated for over-snow vehicle use. After these roads, trails, and areas are designated, over-snow vehicle use not in accordance with these designations is prohibited by 36 CFR 261.14. Over-snow vehicle use off designated roads and trails and outside designated areas is prohibited by 36 CFR 261.14.
2. (b)Scope. The Responsible Official may incorporate previous administrative decisions regarding over-snow vehicle use made under other authorities in designating National Forest System roads, National Forest System trails, and areas on National Forest System lands for over-snow vehicle use under this subpart.
3. (c)Definitions. For definitions of terms used in this subpart, refer to § 212.1.