Quick search by citation:

16 U.S. Code § 396 - Additional lands; acceptance of title

The Secretary of the Interior is authorized, in his discretion and upon submission of evidence of satisfactory title to him, to accept, on behalf of the United States, title to the lands referred to in section 391b of this title as may be deemed by him necessary or desirable for national-park purposes.

(June 20, 1938, ch. 530, § 2, 52 Stat. 784.)
Statutory Notes and Related Subsidiaries
Hawaiʻi Volcanoes National Park

Designation of portion of Hawaii National Park situated on island of Hawaii as Hawaiʻi Volcanoes National Park, effective Sept. 22, 1961, see section 391d of this title.