In addition to any other authority the Commission may have, the Commission is authorized, without regard to the provisions of section 6101 of title 41, to lease land, and to sell, lease, including leases with options to purchase, and otherwise dispose of improvements thereon, and such equipment and other personal property as is determined to be directly related thereto, in the Commission’s Hanford project in and near Richland, Washington, upon a determination by the Commission that such disposition will serve to prevent or reduce the adverse economic impact of actual or anticipated reductions in Commission programs in that area: Provided, however, That the compensation to the Government for any such disposition shall be the estimated fair market value or estimated fair rental value of the property as determined by the Commission: Provided further, That before the Commission makes any disposition of property under the authority of this section, the basis for the proposed disposition (with necessary background and explanatory data) shall be submitted to the Committee on Energy and Natural Resources of the Senate and the Committee on Energy and Commerce of the House of Representatives, and a period of forty-five days shall elapse while Congress is in session (in computing such forty-five-days, there shall be excluded the days on which either House is not in session because of adjournment of more than three days): Provided, however, That those Committees, after having received the basis for the proposed disposition, may by resolution in writing waive the conditions of, or all or any portion of, such forty-five-day period.