(a)
Establishment
In conformity with the conservation and management plans prepared for each unit and the purposes of assuring the preservation, protection, and proper management of any conservation system unit, the Secretary may establish sites and visitor facilities—
(1)
within the unit, if compatible with the purposes for which the unit is established, expanded, or designated by this Act, and the other provisions of this Act, or
(2)
outside the boundaries of, and in the vicinity of, the unit.
To the extent practicable and desirable, the Secretary shall attempt to locate such sites and facilities on Native lands in the vicinity of the unit.