16 U.S.C. § 797a : US Code - Section 797A: Congressional authorization for permits, licenses, leases, or authorizations for dams, conduits, reservoirs, etc., within national parks or monuments

Search 16 U.S.C. § 797a : US Code - Section 797A: Congressional authorization for permits, licenses, leases, or authorizations for dams, conduits, reservoirs, etc., within national parks or monuments

On and after March 3, 1921, no permit, license, lease, or
authorization for dams, conduits, reservoirs, power houses,
transmission lines, or other works for storage or carriage of
water, or for the development, transmission, or utilization of
power within the limits as constituted, March 3, 1921, of any
national park or national monument shall be granted or made without
specific authority of Congress.