The other members of the Commission shall be appointed by the President, by and with the advice and consent of the Senate, and serve on a part-time basis, and be compensated on a per diem basis at a rate of compensation equivalent to the daily rate for level V of the Executive Schedule under section
5316 of title
5 for each day that such member is employed in the actual performance of official business of the Commission as may be directed by the Chairman. Each member shall be reimbursed for travel expenses, including per diem in lieu of subsistence, as authorized by section
5703 of title
5 for persons in Government service employed intermittently.