The first paragraph of this section is from act June 4, 1906, as amended by act Mar. 2, 1907, which changed the authorized term of leasing from ten years to twenty years as set out above. It superseded earlier provisions covering similar matter contained in the first sentence of act Aug. 3, 1894.

The second paragraph of the section is from act Aug. 3, 1894, which contained a further proviso that “persons or corporations now holding leases of ground in the park may, upon the surrender thereof, be granted new leases hereunder, and upon the terms and stipulations contained in their present leases, with such modifications, restrictions, and reservations as the Secretary of the Interior may prescribe” which has been omitted as temporary and executed.

A further provision that “so much of that portion of the act of March third, eighteen hundred and eighty-three, relating to the Yellowstone Park as conflict with the act, be and the same is hereby, repealed” and the portion of the act March 3, 1883, referred to in such provision, have been omitted from the Code, the last named portion having been superseded by the Acts cited to text.