The Chief of Engineers, under the supervision of the Secretary of the Army, is authorized to construct, maintain, and operate public park and recreational facilities at water resource development projects under the control of the Department of the Army, to permit the construction of such facilities by local interests (particularly those to be operated and maintained by such interests), and to permit the maintenance and operation of such facilities by local interests. The Secretary of the Army is also authorized to grant leases of lands, including structures or facilities thereon, at water resource development projects for such periods, and upon such terms and for such purposes as he may deem reasonable in the public interest: Provided, That leases to nonprofit organizations for park or recreational purposes may be granted at reduced or nominal considerations in recognition of the public service to be rendered in utilizing the leased premises: Provided further, That preference shall be given to federally recognized Indian tribes and Federal, State, or local governmental agencies, and licenses or leases where appropriate, may be granted without monetary considerations, to such Indian tribes or agencies for the use of all or any portion of a project area for any public purpose, when the Secretary of the Army determines such action to be in the public interest, and for such periods of time and upon such conditions as he may find advisable: And provided further, That in any such lease or license to a federally recognized Indian tribe 1

The Chief of Engineers, under the supervision of the Secretary of the Army, is authorized to amend any lease entered into providing for the construction, maintenance, and operation of commercial recreational facilities at a water resource development project under the jurisdiction of the Secretary of the Army so as to provide for the adjustment, either by increase or decrease, from time to time during the term of such lease of the amount of rental or other consideration payable to the United States under such lease, when and to the extent he determines such adjustment or extension to be necessary or advisable in the public interest. No adjustment shall be made under the authority of this section so as to increase or decrease the amount of rental or other consideration payable under such lease for any period prior to the date of such adjustment.

The Secretary of Agriculture is authorized to amend any lease entered into with respect to lands under the jurisdiction of the Forest Service providing for the construction, maintenance, and operation of commercial recreational facilities at a Federal reservoir project so as to provide for the adjustment, either by increase or decrease, from time to time during the term of such lease of the amount of rental or other consideration payable to the United States under such lease, when and to the extent he determines such adjustment to be necessary or advisable in the public interest. No adjustment shall be made under the authority of this section so as to increase or decrease the amount of rental or other consideration payable under such lease for any period prior to the date of such adjustment.

The Secretary of the Army may, under such terms and conditions as the Secretary deems appropriate, contract with any public or private entity to provide visitor reservation services. Any such contract in effect on or after October 1, 2004, may provide that the contractor shall be permitted to deduct a commission to be fixed by the Secretary from the amount charged the public for providing such services and to remit the net proceeds therefrom to the contracting agency.