54 U.S.C. § 100707

Information concerning the nature and specific location of a System resource that is endangered, threatened, rare, or commercially valuable, of mineral or paleontological objects within System units, or of objects of cultural patrimony within System units, may be withheld from the public in response to a request under section 552 of title 5 unless the Secretary determines that— (1) disclosure of the information would further the purposes of the System unit in which the resource or object is located and would not create an unreasonable risk of harm, theft, or destruction of the resource or object, including individual organic or inorganic specimens; and (2) disclosure is consistent with other laws protecting the resource or object.