; and (B) the 7-mile segment exclusively on public land within the Custer National Forest from immediately below, but not including, the outlet of East Rosebud Lake downstream to the point at which the Creek enters private property for the first time, to be administered by the Secretary of Agriculture as a recreational river. . (b) Adjacent management (1) In general Nothing in paragraph (213) of section 3(a) of the Wild and Scenic Rivers Act ( 16 U.S.C. 1274(a) ) (as added by subsection (a)) creates a protective perimeter or buffer zone outside the designated boundary of the river segment designated by that paragraph. (2) Outside activities The fact that an otherwise authorized activity or use can be seen or heard within the boundary of the river segment designated by paragraph (213) of section 3(a) of the Wild and Scenic Rivers Act ( 16 U.S.C. 1274(a) ) (as added by subsection (a)) shall not preclude the activity or use outside the boundary of the river segment.