The Yellowstone National Park shall be under the exclusive control of the Secretary of the Interior. In addition to the powers and duties enumerated in section
of this title not inconsistent with this section, he shall make regulations providing for the preservation, from injury or spoliation, of all timber, mineral deposits, natural curiosities, or wonders, within the park, and their retention in their natural condition. The Secretary may, in his discretion, grant leases for building purposes for terms not exceeding thirty years, of small parcels of ground, at such places in the park as may require the erection of buildings for the accommodation of visitors. He shall provide against the wanton destruction of the fish and game found within the park, and against their capture or destruction for the purposes of merchandise or profit. He shall also cause all persons trespassing upon the same to be removed therefrom, and generally is authorized to take all such measures as may be necessary or proper to fully carry out the objects and purposes of this section.