16 U.S.C. § 1911 : US Code - Section 1911: Acquisition of land by Secretary

Search 16 U.S.C. § 1911 : US Code - Section 1911: Acquisition of land by Secretary

Nothing in this chapter shall be construed to limit the authority
of the Secretary to acquire lands and interests in lands within the
boundaries of any unit of the National Park System. The Secretary
is to give prompt and careful consideration to any offer made by
the owner of any valid right or other property within the areas
named in section 1905 of this title to sell such right or other
property, if such owner notifies the Secretary that the continued
ownership of such right or property is causing, or would result in,
undue hardship.