43 CFR §6301.3

A BLM wilderness area is an area of public lands that Congress has designated for BLM to manage as a component of the National Wilderness Preservation System in accordance with the Wilderness Act of 1964. The Wilderness Act provides a detailed definition of wilderness that applies to BLM wilderness areas. See 16 U.S.C. 1131(c) and 43 U.S.C. 1702(i).