The Commission shall solicit subscriptions of funds from private and public sources to help meet the costs of carrying out its duties under this section; the costs of the construction, furnishing, and operation of the center; the costs of research programs and research staff positions, and reasonable administrative costs which may include, subject to the availability of funds, payment to members of the Commission of travel expenses, including per diem in lieu of subsistence, in the same manner as persons employed intermittently in the Government service are allowed expenses under
section 5703 of title 5. Any funds so received by the Commission shall be placed in a special deposit account with the Treasurer of the United States, and may be expended by the Commission only to meet the costs specified in this subparagraph.