No exclusive privilege shall be granted within said park, or on or over the roads and trails therein, except upon ground leased for the erection of buildings or camps thereon.
16 U.S.C. § 45d
No exclusive privilege shall be granted within said park, or on or over the roads and trails therein, except upon ground leased for the erection of buildings or camps thereon.
16 U.S.C. § 45d