36 C.F.R. § 254.37
Conveyance of parcels 40 acres or less that no longer meet National Forest System objectives
(a) This subpart allows conveyance of parcels of 40 acres or less that are determined by Forest Service officials to:
(1) be physically isolated from other Federal land; or
(2) be inaccessible; or
(3) have lost National Forest character.
(b) [Reserved]